annotate src/video/SDL_surface.c @ 1052:68f607298ca9

Some work on using accelerated alpha blits with hardware surfaces. From Stephane Marchesin's fork, don't know who originally wrote it.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 17 Apr 2005 10:40:41 +0000
parents c2f2370ac1e5
children 91569ec25acd
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdio.h>
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29 #include <stdlib.h>
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30 #include <string.h>
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31
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32 #include "SDL_error.h"
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33 #include "SDL_video.h"
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34 #include "SDL_sysvideo.h"
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35 #include "SDL_cursor_c.h"
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36 #include "SDL_blit.h"
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37 #include "SDL_RLEaccel_c.h"
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38 #include "SDL_pixels_c.h"
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39 #include "SDL_memops.h"
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40 #include "SDL_leaks.h"
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41
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42 /* Public routines */
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43 /*
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44 * Create an empty RGB surface of the appropriate depth
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45 */
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46 SDL_Surface * SDL_CreateRGBSurface (Uint32 flags,
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47 int width, int height, int depth,
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48 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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49 {
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50 SDL_VideoDevice *video = current_video;
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51 SDL_VideoDevice *this = current_video;
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52 SDL_Surface *screen;
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53 SDL_Surface *surface;
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54
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55 /* Make sure the size requested doesn't overflow our datatypes */
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56 /* Next time I write a library like SDL, I'll use int for size. :) */
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57 if ( width >= 16384 || height >= 65536 ) {
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58 SDL_SetError("Width or height is too large");
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59 return(NULL);
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60 }
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61
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62 /* Check to see if we desire the surface in video memory */
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63 if ( video ) {
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64 screen = SDL_PublicSurface;
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65 } else {
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66 screen = NULL;
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67 }
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68 if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) {
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69 if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) {
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70 flags |= SDL_HWSURFACE;
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71 }
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72 if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
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73 if ( ! current_video->info.blit_hw_CC ) {
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74 flags &= ~SDL_HWSURFACE;
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75 }
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76 }
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77 if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
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78 if ( ! current_video->info.blit_hw_A ) {
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79 flags &= ~SDL_HWSURFACE;
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80 }
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81 }
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82 } else {
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83 flags &= ~SDL_HWSURFACE;
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84 }
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85
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86 /* Allocate the surface */
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87 surface = (SDL_Surface *)malloc(sizeof(*surface));
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88 if ( surface == NULL ) {
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89 SDL_OutOfMemory();
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90 return(NULL);
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91 }
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92 surface->flags = SDL_SWSURFACE;
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93 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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94 if ((Amask) && (video->displayformatalphapixel))
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95 {
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96 depth = video->displayformatalphapixel->BitsPerPixel;
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97 Rmask = video->displayformatalphapixel->Rmask;
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98 Gmask = video->displayformatalphapixel->Gmask;
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99 Bmask = video->displayformatalphapixel->Bmask;
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100 Amask = video->displayformatalphapixel->Amask;
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101 }
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102 else
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103 {
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104 depth = screen->format->BitsPerPixel;
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105 Rmask = screen->format->Rmask;
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106 Gmask = screen->format->Gmask;
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107 Bmask = screen->format->Bmask;
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108 Amask = screen->format->Amask;
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109 }
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110 }
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111 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask);
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112 if ( surface->format == NULL ) {
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113 free(surface);
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114 return(NULL);
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115 }
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116 if ( Amask ) {
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117 surface->flags |= SDL_SRCALPHA;
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118 }
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119 surface->w = width;
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120 surface->h = height;
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121 surface->pitch = SDL_CalculatePitch(surface);
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122 surface->pixels = NULL;
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123 surface->offset = 0;
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124 surface->hwdata = NULL;
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125 surface->locked = 0;
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126 surface->map = NULL;
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127 surface->unused1 = 0;
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128 SDL_SetClipRect(surface, NULL);
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129 SDL_FormatChanged(surface);
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130
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131 /* Get the pixels */
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132 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) ||
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133 (video->AllocHWSurface(this, surface) < 0) ) {
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134 if ( surface->w && surface->h ) {
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135 surface->pixels = malloc(surface->h*surface->pitch);
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136 if ( surface->pixels == NULL ) {
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137 SDL_FreeSurface(surface);
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138 SDL_OutOfMemory();
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139 return(NULL);
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140 }
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141 /* This is important for bitmaps */
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142 memset(surface->pixels, 0, surface->h*surface->pitch);
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143 }
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144 }
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145
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146 /* Allocate an empty mapping */
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147 surface->map = SDL_AllocBlitMap();
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148 if ( surface->map == NULL ) {
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149 SDL_FreeSurface(surface);
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150 return(NULL);
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151 }
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152
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153 /* The surface is ready to go */
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154 surface->refcount = 1;
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155 #ifdef CHECK_LEAKS
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156 ++surfaces_allocated;
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157 #endif
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158 return(surface);
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159 }
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160 /*
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161 * Create an RGB surface from an existing memory buffer
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162 */
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163 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels,
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164 int width, int height, int depth, int pitch,
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165 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
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166 {
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167 SDL_Surface *surface;
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168
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169 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth,
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170 Rmask, Gmask, Bmask, Amask);
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171 if ( surface != NULL ) {
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172 surface->flags |= SDL_PREALLOC;
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173 surface->pixels = pixels;
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174 surface->w = width;
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175 surface->h = height;
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176 surface->pitch = pitch;
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177 SDL_SetClipRect(surface, NULL);
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178 }
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179 return(surface);
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180 }
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181 /*
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182 * Set the color key in a blittable surface
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183 */
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184 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key)
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185 {
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186 /* Sanity check the flag as it gets passed in */
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187 if ( flag & SDL_SRCCOLORKEY ) {
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188 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) {
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189 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK);
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190 } else {
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191 flag = SDL_SRCCOLORKEY;
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192 }
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193 } else {
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194 flag = 0;
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195 }
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196
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197 /* Optimize away operations that don't change anything */
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198 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) &&
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199 (key == surface->format->colorkey) ) {
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200 return(0);
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201 }
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202
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203 /* UnRLE surfaces before we change the colorkey */
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204 if ( surface->flags & SDL_RLEACCEL ) {
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205 SDL_UnRLESurface(surface, 1);
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206 }
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207
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208 if ( flag ) {
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209 SDL_VideoDevice *video = current_video;
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210 SDL_VideoDevice *this = current_video;
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211
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212
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213 surface->flags |= SDL_SRCCOLORKEY;
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214 surface->format->colorkey = key;
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215 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
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216 if ( (video->SetHWColorKey == NULL) ||
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217 (video->SetHWColorKey(this, surface, key) < 0) ) {
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218 surface->flags &= ~SDL_HWACCEL;
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219 }
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220 }
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diff changeset
221 if ( flag & SDL_RLEACCELOK ) {
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222 surface->flags |= SDL_RLEACCELOK;
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diff changeset
223 } else {
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diff changeset
224 surface->flags &= ~SDL_RLEACCELOK;
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parents:
diff changeset
225 }
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diff changeset
226 } else {
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227 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK);
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diff changeset
228 surface->format->colorkey = 0;
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diff changeset
229 }
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230 SDL_InvalidateMap(surface->map);
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231 return(0);
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diff changeset
232 }
431
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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parents: 422
diff changeset
233 /* This function sets the alpha channel of a surface */
0
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234 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value)
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parents:
diff changeset
235 {
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236 Uint32 oldflags = surface->flags;
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237 Uint32 oldalpha = surface->format->alpha;
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238
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parents:
diff changeset
239 /* Sanity check the flag as it gets passed in */
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parents:
diff changeset
240 if ( flag & SDL_SRCALPHA ) {
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parents:
diff changeset
241 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) {
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diff changeset
242 flag = (SDL_SRCALPHA | SDL_RLEACCELOK);
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parents:
diff changeset
243 } else {
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diff changeset
244 flag = SDL_SRCALPHA;
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diff changeset
245 }
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diff changeset
246 } else {
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diff changeset
247 flag = 0;
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diff changeset
248 }
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diff changeset
249
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parents:
diff changeset
250 /* Optimize away operations that don't change anything */
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parents:
diff changeset
251 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) &&
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parents:
diff changeset
252 (!flag || value == oldalpha) ) {
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diff changeset
253 return(0);
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parents:
diff changeset
254 }
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diff changeset
255
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diff changeset
256 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL))
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diff changeset
257 SDL_UnRLESurface(surface, 1);
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parents:
diff changeset
258
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parents:
diff changeset
259 if ( flag ) {
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diff changeset
260 SDL_VideoDevice *video = current_video;
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diff changeset
261 SDL_VideoDevice *this = current_video;
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parents:
diff changeset
262
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diff changeset
263 surface->flags |= SDL_SRCALPHA;
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diff changeset
264 surface->format->alpha = value;
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parents:
diff changeset
265 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
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parents:
diff changeset
266 if ( (video->SetHWAlpha == NULL) ||
74212992fb08 Initial revision
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diff changeset
267 (video->SetHWAlpha(this, surface, value) < 0) ) {
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diff changeset
268 surface->flags &= ~SDL_HWACCEL;
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parents:
diff changeset
269 }
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diff changeset
270 }
74212992fb08 Initial revision
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diff changeset
271 if ( flag & SDL_RLEACCELOK ) {
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parents:
diff changeset
272 surface->flags |= SDL_RLEACCELOK;
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parents:
diff changeset
273 } else {
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diff changeset
274 surface->flags &= ~SDL_RLEACCELOK;
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parents:
diff changeset
275 }
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diff changeset
276 } else {
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diff changeset
277 surface->flags &= ~SDL_SRCALPHA;
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diff changeset
278 surface->format->alpha = SDL_ALPHA_OPAQUE;
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parents:
diff changeset
279 }
74212992fb08 Initial revision
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parents:
diff changeset
280 /*
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parents:
diff changeset
281 * The representation for software surfaces is independent of
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parents:
diff changeset
282 * per-surface alpha, so no need to invalidate the blit mapping
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parents:
diff changeset
283 * if just the alpha value was changed. (If either is 255, we still
74212992fb08 Initial revision
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parents:
diff changeset
284 * need to invalidate.)
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diff changeset
285 */
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diff changeset
286 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL
74212992fb08 Initial revision
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parents:
diff changeset
287 || oldflags != surface->flags
74212992fb08 Initial revision
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parents:
diff changeset
288 || (((oldalpha + 1) ^ (value + 1)) & 0x100))
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parents:
diff changeset
289 SDL_InvalidateMap(surface->map);
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diff changeset
290 return(0);
74212992fb08 Initial revision
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parents:
diff changeset
291 }
431
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
292 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value)
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
293 {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
294 int row, col;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
295 int offset;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
296 Uint8 *buf;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
297
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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parents: 422
diff changeset
298 if ( (surface->format->Amask != 0xFF000000) &&
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
299 (surface->format->Amask != 0x000000FF) ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
300 SDL_SetError("Unsupported surface alpha mask format");
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
301 return -1;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
302 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
303
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
304 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
305 if ( surface->format->Amask == 0xFF000000 ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
306 offset = 3;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
307 } else {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
308 offset = 0;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
309 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
310 #else
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
311 if ( surface->format->Amask == 0xFF000000 ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
312 offset = 0;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
313 } else {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
314 offset = 3;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
315 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
316 #endif /* Byte ordering */
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
317
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
318 /* Quickly set the alpha channel of an RGBA or ARGB surface */
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
319 if ( SDL_MUSTLOCK(surface) ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
320 if ( SDL_LockSurface(surface) < 0 ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
321 return -1;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
322 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
323 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
324 row = surface->h;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
325 while (row--) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
326 col = surface->w;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
327 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
328 while(col--) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
329 *buf = value;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
330 buf += 4;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
331 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
332 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
333 if ( SDL_MUSTLOCK(surface) ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
334 SDL_UnlockSurface(surface);
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
335 }
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
336 return 0;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
337 }
0
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parents:
diff changeset
338
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parents:
diff changeset
339 /*
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parents:
diff changeset
340 * A function to calculate the intersection of two rectangles:
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parents:
diff changeset
341 * return true if the rectangles intersect, false otherwise
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 */
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parents:
diff changeset
343 static __inline__
130
14af14ff7c19 The rectangle argument to SDL_SetClipRect is really const
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
344 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection)
0
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parents:
diff changeset
345 {
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parents:
diff changeset
346 int Amin, Amax, Bmin, Bmax;
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parents:
diff changeset
347
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parents:
diff changeset
348 /* Horizontal intersection */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 Amin = A->x;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 Amax = Amin + A->w;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 Bmin = B->x;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 Bmax = Bmin + B->w;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 if(Bmin > Amin)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 Amin = Bmin;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 intersection->x = Amin;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 if(Bmax < Amax)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 Amax = Bmax;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0;
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parents:
diff changeset
359
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parents:
diff changeset
360 /* Vertical intersection */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 Amin = A->y;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 Amax = Amin + A->h;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 Bmin = B->y;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 Bmax = Bmin + B->h;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 if(Bmin > Amin)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 Amin = Bmin;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 intersection->y = Amin;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 if(Bmax < Amax)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 Amax = Bmax;
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parents:
diff changeset
370 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0;
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parents:
diff changeset
371
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 return (intersection->w && intersection->h);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 * Set the clipping rectangle for a blittable surface
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 */
130
14af14ff7c19 The rectangle argument to SDL_SetClipRect is really const
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
377 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 SDL_Rect full_rect;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380
74212992fb08 Initial revision
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parents:
diff changeset
381 /* Don't do anything if there's no surface to act on */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 if ( ! surface ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 return SDL_FALSE;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 /* Set up the full surface rectangle */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 full_rect.x = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 full_rect.y = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 full_rect.w = surface->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 full_rect.h = surface->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 /* Set the clipping rectangle */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 if ( ! rect ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 surface->clip_rect = full_rect;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
396 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 if ( surface && rect ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 *rect = surface->clip_rect;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 * Set up a blit between two surfaces -- split into three parts:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 * The upper part, SDL_UpperBlit(), performs clipping and rectangle
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 * verification. The lower part is a pointer to a low level
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 * accelerated blitting function.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 *
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 * These parts are separated out and each used internally by this
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 * library in the optimimum places. They are exported so that if
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 * you know exactly what you are doing, you can optimize your code
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 * by calling the one(s) you need.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 SDL_Surface *dst, SDL_Rect *dstrect)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 SDL_blit do_blit;
462
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
420 SDL_Rect hw_srcrect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
421 SDL_Rect hw_dstrect;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 /* Check to make sure the blit mapping is valid */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 if ( (src->map->dst != dst) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 (src->map->dst->format_version != src->map->format_version) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 if ( SDL_MapSurface(src, dst) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 /* Figure out which blitter to use */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
462
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
433 if ( src == SDL_VideoSurface ) {
519
c7da0cd5ae5e *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 462
diff changeset
434 hw_srcrect = *srcrect;
462
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
435 hw_srcrect.x += current_video->offset_x;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
436 hw_srcrect.y += current_video->offset_y;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
437 srcrect = &hw_srcrect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
438 }
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
439 if ( dst == SDL_VideoSurface ) {
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
440 hw_dstrect = *dstrect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
441 hw_dstrect.x += current_video->offset_x;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
442 hw_dstrect.y += current_video->offset_y;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
443 dstrect = &hw_dstrect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
444 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 do_blit = src->map->hw_blit;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 do_blit = src->map->sw_blit;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 return(do_blit(src, srcrect, dst, dstrect));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 SDL_Surface *dst, SDL_Rect *dstrect)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 SDL_Rect fulldst;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 int srcx, srcy, w, h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 /* Make sure the surfaces aren't locked */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 if ( ! src || ! dst ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 SDL_SetError("SDL_UpperBlit: passed a NULL surface");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 if ( src->locked || dst->locked ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 SDL_SetError("Surfaces must not be locked during blit");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 /* If the destination rectangle is NULL, use the entire dest surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 if ( dstrect == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 fulldst.x = fulldst.y = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 dstrect = &fulldst;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 /* clip the source rectangle to the source surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 if(srcrect) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 int maxw, maxh;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 srcx = srcrect->x;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 w = srcrect->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 if(srcx < 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 w += srcx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 dstrect->x -= srcx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 srcx = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 maxw = src->w - srcx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 if(maxw < w)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 w = maxw;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 srcy = srcrect->y;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 h = srcrect->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 if(srcy < 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 h += srcy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 dstrect->y -= srcy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 srcy = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 maxh = src->h - srcy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 if(maxh < h)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 h = maxh;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
501 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 srcx = srcy = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 w = src->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 h = src->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507 /* clip the destination rectangle against the clip rectangle */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509 SDL_Rect *clip = &dst->clip_rect;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
510 int dx, dy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 dx = clip->x - dstrect->x;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 if(dx > 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 w -= dx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 dstrect->x += dx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 srcx += dx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 dx = dstrect->x + w - clip->x - clip->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 if(dx > 0)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 w -= dx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 dy = clip->y - dstrect->y;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 if(dy > 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524 h -= dy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 dstrect->y += dy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 srcy += dy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 dy = dstrect->y + h - clip->y - clip->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 if(dy > 0)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 h -= dy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 if(w > 0 && h > 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 SDL_Rect sr;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535 sr.x = srcx;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 sr.y = srcy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 sr.w = dstrect->w = w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 sr.h = dstrect->h = h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539 return SDL_LowerBlit(src, &sr, dst, dstrect);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541 dstrect->w = dstrect->h = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 return 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544
532
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
545 static int SDL_FillRect1(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
546 {
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
547 /* FIXME: We have to worry about packing order.. *sigh* */
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
548 SDL_SetError("1-bpp rect fill not yet implemented");
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
549 return -1;
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
550 }
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
551
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
552 static int SDL_FillRect4(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
553 {
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
554 /* FIXME: We have to worry about packing order.. *sigh* */
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
555 SDL_SetError("4-bpp rect fill not yet implemented");
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
556 return -1;
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
557 }
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
558
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560 * This function performs a fast fill of the given rectangle with 'color'
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 int x, y;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567 Uint8 *row;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
568
532
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
569 /* This function doesn't work on surfaces < 8 bpp */
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
570 if ( dst->format->BitsPerPixel < 8 ) {
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
571 switch(dst->format->BitsPerPixel) {
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
572 case 1:
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
573 return SDL_FillRect1(dst, dstrect, color);
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
574 break;
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
575 case 4:
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
576 return SDL_FillRect4(dst, dstrect, color);
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
577 break;
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
578 default:
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
579 SDL_SetError("Fill rect on unsupported surface format");
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
580 return(-1);
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
581 break;
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
582 }
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
583 }
058d47b7a3b4 Return an error with color fills on less than 8 bpp surfaces.
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
584
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
585 /* If 'dstrect' == NULL, then fill the whole surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
586 if ( dstrect ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
587 /* Perform clipping */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
588 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 dstrect = &dst->clip_rect;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595 /* Check for hardware acceleration */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 video->info.blit_fill ) {
462
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
598 SDL_Rect hw_rect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
599 if ( dst == SDL_VideoSurface ) {
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
600 hw_rect = *dstrect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
601 hw_rect.x += current_video->offset_x;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
602 hw_rect.y += current_video->offset_y;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
603 dstrect = &hw_rect;
1be0cdaf8092 Fixed offset bug in hardware accelerated fills and blits
Sam Lantinga <slouken@libsdl.org>
parents: 441
diff changeset
604 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605 return(video->FillHWRect(this, dst, dstrect, color));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
607
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
608 /* Perform software fill */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
609 if ( SDL_LockSurface(dst) != 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
610 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
611 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
612 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
613 dstrect->x*dst->format->BytesPerPixel;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
614 if ( dst->format->palette || (color == 0) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
615 x = dstrect->w*dst->format->BytesPerPixel;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
616 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
617 int n = x >> 2;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
618 for ( y=dstrect->h; y; --y ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
619 SDL_memset4(row, 0, n);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
621 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
622 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
623 #ifdef __powerpc__
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
624 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
625 * memset() on PPC (both glibc and codewarrior) uses
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
626 * the dcbz (Data Cache Block Zero) instruction, which
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
627 * causes an alignment exception if the destination is
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
628 * uncachable, so only use it on software surfaces
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
629 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
630 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
631 if(dstrect->w >= 8) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
632 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
633 * 64-bit stores are probably most
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
634 * efficient to uncached video memory
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
635 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
636 double fill;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
637 memset(&fill, color, (sizeof fill));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
638 for(y = dstrect->h; y; y--) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
639 Uint8 *d = row;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
640 unsigned n = x;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
641 unsigned nn;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
642 Uint8 c = color;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
643 double f = fill;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
644 while((unsigned long)d
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
645 & (sizeof(double) - 1)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
646 *d++ = c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
647 n--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
648 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
649 nn = n / (sizeof(double) * 4);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
650 while(nn) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
651 ((double *)d)[0] = f;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
652 ((double *)d)[1] = f;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
653 ((double *)d)[2] = f;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
654 ((double *)d)[3] = f;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
655 d += 4*sizeof(double);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
656 nn--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
657 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
658 n &= ~(sizeof(double) * 4 - 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
659 nn = n / sizeof(double);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
660 while(nn) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
661 *(double *)d = f;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
662 d += sizeof(double);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
663 nn--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
664 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
665 n &= ~(sizeof(double) - 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
666 while(n) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
667 *d++ = c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
668 n--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
669 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
670 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
671 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
672 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
673 /* narrow boxes */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
674 for(y = dstrect->h; y; y--) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
675 Uint8 *d = row;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
676 Uint8 c = color;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
677 int n = x;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
678 while(n) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
679 *d++ = c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
680 n--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
681 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
682 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
683 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
684 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
685 } else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
686 #endif /* __powerpc__ */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
687 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
688 for(y = dstrect->h; y; y--) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
689 memset(row, color, x);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
690 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
691 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
692 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
693 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
694 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
695 switch (dst->format->BytesPerPixel) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
696 case 2:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
697 for ( y=dstrect->h; y; --y ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
698 Uint16 *pixels = (Uint16 *)row;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
699 Uint16 c = color;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
700 Uint32 cc = (Uint32)c << 16 | c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
701 int n = dstrect->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
702 if((unsigned long)pixels & 3) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
703 *pixels++ = c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
704 n--;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
705 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
706 if(n >> 1)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
707 SDL_memset4(pixels, cc, n >> 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
708 if(n & 1)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
709 pixels[n - 1] = c;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
710 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
711 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
712 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
713
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
714 case 3:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
715 if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
716 color <<= 8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
717 for ( y=dstrect->h; y; --y ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
718 Uint8 *pixels = row;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
719 for ( x=dstrect->w; x; --x ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
720 memcpy(pixels, &color, 3);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
721 pixels += 3;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
722 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
723 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
724 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
725 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
726
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
727 case 4:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
728 for(y = dstrect->h; y; --y) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
729 SDL_memset4(row, color, dstrect->w);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
730 row += dst->pitch;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
731 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
732 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
733 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
734 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
735 SDL_UnlockSurface(dst);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
736
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
737 /* We're done! */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
738 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
739 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
740
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
741 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
742 * Lock a surface to directly access the pixels
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
743 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
744 int SDL_LockSurface (SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
745 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
746 if ( ! surface->locked ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
747 /* Perform the lock */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
748 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
749 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
750 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
751 if ( video->LockHWSurface(this, surface) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
752 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
753 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
754 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
755 if ( surface->flags & SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
756 SDL_UnRLESurface(surface, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
757 surface->flags |= SDL_RLEACCEL; /* save accel'd state */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
758 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
759 /* This needs to be done here in case pixels changes value */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
760 surface->pixels = (Uint8 *)surface->pixels + surface->offset;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
761 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
762
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
763 /* Increment the surface lock count, for recursive locks */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
764 ++surface->locked;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
765
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
766 /* Ready to go.. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
767 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
768 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
769 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
770 * Unlock a previously locked surface
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
771 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
772 void SDL_UnlockSurface (SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
773 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
774 /* Only perform an unlock if we are locked */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
775 if ( ! surface->locked || (--surface->locked > 0) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
776 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
777 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
778
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
779 /* Perform the unlock */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
780 surface->pixels = (Uint8 *)surface->pixels - surface->offset;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
781
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
782 /* Unlock hardware or accelerated surfaces */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
783 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
784 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
785 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
786 video->UnlockHWSurface(this, surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
787 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
788 /* Update RLE encoded surface with new data */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
789 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
790 surface->flags &= ~SDL_RLEACCEL; /* stop lying */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
791 SDL_RLESurface(surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
792 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
793 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
794 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
795
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
796 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
797 * Convert a surface into the specified pixel format.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
798 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
799 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
800 SDL_PixelFormat *format, Uint32 flags)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
801 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
802 SDL_Surface *convert;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
803 Uint32 colorkey = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
804 Uint8 alpha = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
805 Uint32 surface_flags;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
806 SDL_Rect bounds;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
807
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
808 /* Check for empty destination palette! (results in empty image) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
809 if ( format->palette != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
810 int i;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
811 for ( i=0; i<format->palette->ncolors; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
812 if ( (format->palette->colors[i].r != 0) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
813 (format->palette->colors[i].g != 0) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
814 (format->palette->colors[i].b != 0) )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
815 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
816 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
817 if ( i == format->palette->ncolors ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
818 SDL_SetError("Empty destination palette");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
819 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
820 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
821 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
822
264
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
823 /* Only create hw surfaces with alpha channel if hw alpha blits
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
824 are supported */
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
825 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) {
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
826 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
827 if(!vi || !vi->blit_hw_A)
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
828 flags &= ~SDL_HWSURFACE;
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
829 }
c9cd3b564e4b *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
830
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
831 /* Create a new surface with the desired format */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
832 convert = SDL_CreateRGBSurface(flags,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
833 surface->w, surface->h, format->BitsPerPixel,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
834 format->Rmask, format->Gmask, format->Bmask, format->Amask);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
835 if ( convert == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
836 return(NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
837 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
838
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
839 /* Copy the palette if any */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
840 if ( format->palette && convert->format->palette ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
841 memcpy(convert->format->palette->colors,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
842 format->palette->colors,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
843 format->palette->ncolors*sizeof(SDL_Color));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
844 convert->format->palette->ncolors = format->palette->ncolors;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
845 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
846
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
847 /* Save the original surface color key and alpha */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
848 surface_flags = surface->flags;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
849 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
850 /* Convert colourkeyed surfaces to RGBA if requested */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
851 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
852 && format->Amask) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
853 surface_flags &= ~SDL_SRCCOLORKEY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
854 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
855 colorkey = surface->format->colorkey;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
856 SDL_SetColorKey(surface, 0, 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
857 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
858 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
859 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
431
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
860 /* Copy over the alpha channel to RGBA if requested */
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
861 if ( format->Amask ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
862 surface->flags &= ~SDL_SRCALPHA;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
863 } else {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
864 alpha = surface->format->alpha;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
865 SDL_SetAlpha(surface, 0, 0);
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
866 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
867 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
868
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
869 /* Copy over the image data */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
870 bounds.x = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
871 bounds.y = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
872 bounds.w = surface->w;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
873 bounds.h = surface->h;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
874 SDL_LowerBlit(surface, &bounds, convert, &bounds);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
875
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
876 /* Clean up the original surface, and update converted surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
877 if ( convert != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
878 SDL_SetClipRect(convert, &surface->clip_rect);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
879 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
880 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
881 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
882 if ( convert != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
883 Uint8 keyR, keyG, keyB;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
884
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
885 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
886 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK),
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
887 SDL_MapRGB(convert->format, keyR, keyG, keyB));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
888 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
889 SDL_SetColorKey(surface, cflags, colorkey);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
890 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
891 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
892 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
893 if ( convert != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
894 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK),
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
895 alpha);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
896 }
431
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
897 if ( format->Amask ) {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
898 surface->flags |= SDL_SRCALPHA;
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
899 } else {
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
900 SDL_SetAlpha(surface, aflags, alpha);
41cadcba32e8 Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents: 422
diff changeset
901 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
902 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
903
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
904 /* We're ready to go! */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
905 return(convert);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
906 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
907
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
908 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
909 * Free a surface created by the above function.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
910 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
911 void SDL_FreeSurface (SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
912 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
913 /* Free anything that's not NULL, and not the screen surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
914 if ((surface == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
915 (current_video &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
916 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
917 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
918 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
919 if ( --surface->refcount > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
920 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
921 }
915
01cddd0f2efb You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents: 845
diff changeset
922 while ( surface->locked > 0 ) {
01cddd0f2efb You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents: 845
diff changeset
923 SDL_UnlockSurface(surface);
01cddd0f2efb You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents: 845
diff changeset
924 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
925 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
926 SDL_UnRLESurface(surface, 0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
927 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
928 if ( surface->format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
929 SDL_FreeFormat(surface->format);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
930 surface->format = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
931 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
932 if ( surface->map != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
933 SDL_FreeBlitMap(surface->map);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
934 surface->map = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
935 }
422
b1b9ee41be70 Memory leak fix for DirectX software surfaces
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
936 if ( surface->hwdata ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
937 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
938 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
939 video->FreeHWSurface(this, surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
940 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
941 if ( surface->pixels &&
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
942 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
943 free(surface->pixels);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
944 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
945 free(surface);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
946 #ifdef CHECK_LEAKS
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
947 --surfaces_allocated;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
948 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
949 }