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annotate src/video/fbcon/SDL_fb3dfx.c @ 4590:1ad70fb49fcb

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Fix so many things that there is little place in this column to list them all but the result is that blending modes just work now for drawing primitives. Fixes involved: 1. Fix handling of alpha channel when SDL_BLENDMODE_NONE is set. 2. Make xrendercolor use floating-point values for color channels and then convert to 16 bit ints. 3. Fix handling of visuals in SDL_x11modes.c so that a 32 bit ARGB visual is used. 4. Fix the background pixel value in SDL_x11window.c so that the window background has an alpha value of 0xFF and not 0.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 09 Jul 2010 21:36:41 +0530
parents f7b03b6838cb
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "../SDL_blit.h"
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26 #include "SDL_fb3dfx.h"
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27 #include "3dfx_mmio.h"
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28
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29
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30 /* Wait for vertical retrace */
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31 static void
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32 WaitVBL(_THIS)
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33 {
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34 /* find start of retrace */
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35 tdfx_waitidle();
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36 while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE);
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37 /* wait until we're past the start */
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38 while ((tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0);
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39 }
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40
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41 static void
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42 WaitIdle(_THIS)
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43 {
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44 tdfx_waitidle();
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45 }
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46
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47 /* Sets video mem colorkey and accelerated blit function */
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48 static int
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49 SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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50 {
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51 return (0);
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52 }
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53
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54 static int
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55 FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
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56 {
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57 int bpp;
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58 char *dst_base;
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59 Uint32 format;
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60 int dstX, dstY;
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61
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62 /* Don't blit to the display surface when switched away */
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63 if (switched_away) {
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64 return -2; /* no hardware access */
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65 }
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66 if (dst == this->screen) {
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67 SDL_mutexP(hw_lock);
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68 }
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69
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70 /* Set the destination pixel format */
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71 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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72 bpp = dst->format->BitsPerPixel;
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73 format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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74
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75 /* Calculate source and destination base coordinates */
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76 dstX = rect->x;
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77 dstY = rect->y;
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78
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79 /* Execute the fill command */
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80 tdfx_wait(6);
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81 tdfx_out32(DSTBASE, (Uint32) dst_base);
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82 tdfx_out32(DSTFORMAT, format);
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83 tdfx_out32(COLORFORE, color);
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84 tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
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85 tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
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86 tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
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87
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88 FB_AddBusySurface(dst);
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89
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90 if (dst == this->screen) {
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91 SDL_mutexV(hw_lock);
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92 }
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93 return (0);
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94 }
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95
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96 static int
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97 HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
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98 SDL_Surface * dst, SDL_Rect * dstrect)
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99 {
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100 SDL_VideoDevice *this = current_video;
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101 int bpp;
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102 Uint32 src_format;
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103 Uint32 dst_format;
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104 char *src_base;
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105 char *dst_base;
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106 int srcX, srcY;
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107 int dstX, dstY;
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108 Uint32 blitop;
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109 Uint32 use_colorkey;
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110
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111 /* Don't blit to the display surface when switched away */
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112 if (switched_away) {
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113 return -2; /* no hardware access */
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114 }
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115 if (dst == this->screen) {
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116 SDL_mutexP(hw_lock);
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117 }
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118
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119 /* Set the source and destination pixel format */
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120 src_base = (char *) ((char *) src->pixels - mapped_mem);
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121 bpp = src->format->BitsPerPixel;
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122 src_format = src->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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123 dst_base = (char *) ((char *) dst->pixels - mapped_mem);
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124 bpp = dst->format->BitsPerPixel;
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125 dst_format = dst->pitch | ((bpp + ((bpp == 8) ? 0 : 8)) << 13);
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126
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127 srcX = srcrect->x;
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128 srcY = srcrect->y;
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129 dstX = dstrect->x;
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130 dstY = dstrect->y;
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131
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132 /* Assemble the blit operation */
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133 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
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134 if (srcX <= dstX) {
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135 blitop |= BIT(14);
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136 srcX += (dstrect->w - 1);
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137 dstX += (dstrect->w - 1);
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138 }
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139 if (srcY <= dstY) {
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140 blitop |= BIT(15);
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141 srcY += (dstrect->h - 1);
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142 dstY += (dstrect->h - 1);
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143 }
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144
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145 /* Perform the blit! */
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146 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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147 tdfx_wait(3);
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148 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
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149 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
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150 tdfx_out32(ROP_2D, 0xAA00);
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151 use_colorkey = 1;
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152 } else {
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153 use_colorkey = 0;
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154 }
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155 tdfx_wait(9);
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156 tdfx_out32(SRCBASE, (Uint32) src_base);
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157 tdfx_out32(SRCFORMAT, src_format);
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158 tdfx_out32(DSTBASE, (Uint32) dst_base);
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159 tdfx_out32(DSTFORMAT, src_format);
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160 tdfx_out32(COMMAND_2D, blitop);
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161 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
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162 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
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163 tdfx_out32(DSTXY, dstX | (dstY << 16));
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164 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
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165
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166 FB_AddBusySurface(src);
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167 FB_AddBusySurface(dst);
106
63ec24e0575f Merged DGA video surface handling improvements, unified locking code.
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168
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169 if (dst == this->screen) {
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170 SDL_mutexV(hw_lock);
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171 }
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172 return (0);
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173 }
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174
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175 static int
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176 CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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177 {
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178 int accelerated;
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179
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180 /* Set initial acceleration on */
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181 src->flags |= SDL_HWACCEL;
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182
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183 /* Set the surface attributes */
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184 if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA) {
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185 if (!this->info.blit_hw_A) {
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186 src->flags &= ~SDL_HWACCEL;
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187 }
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188 }
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189 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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190 if (!this->info.blit_hw_CC) {
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191 src->flags &= ~SDL_HWACCEL;
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192 }
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193 }
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194
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195 /* Check to see if final surface blit is accelerated */
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196 accelerated = !!(src->flags & SDL_HWACCEL);
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197 if (accelerated) {
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198 src->map->hw_blit = HWAccelBlit;
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199 }
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200 return (accelerated);
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201 }
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202
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203 void
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204 FB_3DfxAccel(_THIS, __u32 card)
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205 {
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206 /* We have hardware accelerated surface functions */
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207 this->CheckHWBlit = CheckHWBlit;
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208 wait_vbl = WaitVBL;
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209 wait_idle = WaitIdle;
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210
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211 /* Reset the 3Dfx controller */
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212 tdfx_out32(BRESERROR0, 0);
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213 tdfx_out32(BRESERROR1, 0);
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214
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215 /* The 3Dfx has an accelerated color fill */
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216 this->info.blit_fill = 1;
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217 this->FillHWRect = FillHWRect;
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218
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219 /* The 3Dfx has accelerated normal and colorkey blits */
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220 this->info.blit_hw = 1;
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221 this->info.blit_hw_CC = 1;
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222 this->SetHWColorKey = SetHWColorKey;
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223 }
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224
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225 /* vi: set ts=4 sw=4 expandtab: */