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annotate src/video/dummy/SDL_nullrender.c @ 2896:1ef2f1e75ff7

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Date: Sat, 20 Dec 2008 23:25:19 +0100 From: Couriersud Subject: 32 & 16 bit versions of blendrect and blendline attached are 32, 16 and 15 bit versions of the blendrect and blendline functionality. There was an issue with the bresenham alg. in drawline which I also fixed.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 23:19:20 +0000
parents 32e8bbba1e94
children 133601e3b255
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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_sysvideo.h"
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26 #include "../SDL_yuv_sw_c.h"
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27 #include "../SDL_renderer_sw.h"
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28
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29
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30 /* SDL surface based renderer implementation */
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31
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32 static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
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33 Uint32 flags);
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34 static int SDL_DUMMY_SetDrawColor(SDL_Renderer * renderer);
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35 static int SDL_DUMMY_SetDrawBlendMode(SDL_Renderer * renderer);
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36 static int SDL_DUMMY_RenderLine(SDL_Renderer * renderer, int x1, int y1,
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37 int x2, int y2);
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38 static int SDL_DUMMY_RenderFill(SDL_Renderer * renderer,
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39 const SDL_Rect * rect);
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40 static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer,
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41 SDL_Texture * texture,
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42 const SDL_Rect * srcrect,
1985
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43 const SDL_Rect * dstrect);
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44 static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
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45 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
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46
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47
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48 SDL_RenderDriver SDL_DUMMY_RenderDriver = {
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49 SDL_DUMMY_CreateRenderer,
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50 {
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51 "dummy",
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52 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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53 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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54 SDL_RENDERER_PRESENTDISCARD),
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55 }
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56 };
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57
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58 typedef struct
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59 {
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60 int current_screen;
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61 SDL_Surface *screens[3];
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62 } SDL_DUMMY_RenderData;
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63
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64 SDL_Renderer *
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65 SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
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66 {
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67 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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68 SDL_DisplayMode *displayMode = &display->current_mode;
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69 SDL_Renderer *renderer;
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70 SDL_DUMMY_RenderData *data;
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71 int i, n;
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72 int bpp;
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73 Uint32 Rmask, Gmask, Bmask, Amask;
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74
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75 if (!SDL_PixelFormatEnumToMasks
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76 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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77 SDL_SetError("Unknown display format");
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78 return NULL;
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79 }
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80
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81 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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82 if (!renderer) {
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83 SDL_OutOfMemory();
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84 return NULL;
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85 }
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86
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87 data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
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88 if (!data) {
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89 SDL_DUMMY_DestroyRenderer(renderer);
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90 SDL_OutOfMemory();
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91 return NULL;
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92 }
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93 SDL_zerop(data);
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94
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95 renderer->SetDrawColor = SDL_DUMMY_SetDrawColor;
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96 renderer->SetDrawBlendMode = SDL_DUMMY_SetDrawBlendMode;
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97 renderer->RenderLine = SDL_DUMMY_RenderLine;
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98 renderer->RenderFill = SDL_DUMMY_RenderFill;
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99 renderer->RenderCopy = SDL_DUMMY_RenderCopy;
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100 renderer->RenderPresent = SDL_DUMMY_RenderPresent;
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101 renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
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102 renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
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103 renderer->info.flags = 0;
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104 renderer->window = window->id;
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105 renderer->driverdata = data;
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106 Setup_SoftwareRenderer(renderer);
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107
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108 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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109 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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110 n = 2;
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111 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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112 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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113 n = 3;
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114 } else {
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115 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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116 n = 1;
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117 }
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118 for (i = 0; i < n; ++i) {
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119 data->screens[i] =
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120 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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121 Bmask, Amask);
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122 if (!data->screens[i]) {
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123 SDL_DUMMY_DestroyRenderer(renderer);
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124 return NULL;
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125 }
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126 SDL_SetSurfacePalette(data->screens[i], display->palette);
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127 }
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128 data->current_screen = 0;
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129
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130 return renderer;
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131 }
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132
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133 static int
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134 SDL_DUMMY_SetDrawColor(SDL_Renderer * renderer)
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135 {
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136 return 0;
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137 }
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138
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139 static int
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140 SDL_DUMMY_SetDrawBlendMode(SDL_Renderer * renderer)
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141 {
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142 return 0;
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143 }
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144
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145 static int
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146 SDL_DUMMY_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
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147 {
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148 SDL_DUMMY_RenderData *data =
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149 (SDL_DUMMY_RenderData *) renderer->driverdata;
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150 SDL_Surface *target = data->screens[data->current_screen];
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151 int status;
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152
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153 if (renderer->blendMode == SDL_BLENDMODE_NONE) {
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154 Uint32 color =
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155 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
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156 renderer->a);
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157
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158 status = SDL_DrawLine(target, x1, y1, x2, y2, color);
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159 } else {
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160 status =
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161 SDL_BlendLine(target, x1, y1, x2, y2, renderer->blendMode,
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162 renderer->r, renderer->g, renderer->b, renderer->a);
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163 }
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164 return status;
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165 }
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166
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167 static int
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168 SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
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169 {
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170 SDL_DUMMY_RenderData *data =
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171 (SDL_DUMMY_RenderData *) renderer->driverdata;
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172 SDL_Surface *target = data->screens[data->current_screen];
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173 SDL_Rect real_rect = *rect;
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174 int status;
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175
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176 if (renderer->blendMode == SDL_BLENDMODE_NONE) {
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177 Uint32 color =
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178 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
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179 renderer->a);
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180
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181 status = SDL_FillRect(target, &real_rect, color);
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182 } else {
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183 status =
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184 SDL_BlendRect(target, &real_rect, renderer->blendMode,
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185 renderer->r, renderer->g, renderer->b, renderer->a);
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186 }
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187 return status;
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188 }
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189
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190 static int
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191 SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
1985
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192 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
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193 {
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194 SDL_DUMMY_RenderData *data =
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195 (SDL_DUMMY_RenderData *) renderer->driverdata;
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196 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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197 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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198
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199 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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200 SDL_Surface *target = data->screens[data->current_screen];
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201 void *pixels =
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202 (Uint8 *) target->pixels + dstrect->y * target->pitch +
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203 dstrect->x * target->format->BytesPerPixel;
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204 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
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diff changeset
205 srcrect, display->current_mode.format,
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diff changeset
206 dstrect->w, dstrect->h, pixels,
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diff changeset
207 target->pitch);
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diff changeset
208 } else {
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209 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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diff changeset
210 SDL_Surface *target = data->screens[data->current_screen];
2267
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diff changeset
211 SDL_Rect real_srcrect = *srcrect;
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diff changeset
212 SDL_Rect real_dstrect = *dstrect;
1908
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diff changeset
213
2267
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diff changeset
214 return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
1908
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diff changeset
215 }
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diff changeset
216 }
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diff changeset
217
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diff changeset
218 static void
1895
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diff changeset
219 SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
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diff changeset
220 {
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diff changeset
221 static int frame_number;
1912
8d384b647307 Setting up the OpenGL support
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diff changeset
222 SDL_DUMMY_RenderData *data =
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diff changeset
223 (SDL_DUMMY_RenderData *) renderer->driverdata;
1895
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diff changeset
224
1908
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diff changeset
225 /* Send the data to the display */
1895
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diff changeset
226 if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
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diff changeset
227 char file[128];
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diff changeset
228 SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
229 renderer->window, ++frame_number);
1908
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diff changeset
230 SDL_SaveBMP(data->screens[data->current_screen], file);
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diff changeset
231 }
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diff changeset
232
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diff changeset
233 /* Update the flipping chain, if any */
1965
a788656ca29a SDL constants are all uppercase.
Sam Lantinga <slouken@libsdl.org>
parents: 1912
diff changeset
234 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
1908
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parents: 1907
diff changeset
235 data->current_screen = (data->current_screen + 1) % 2;
1965
a788656ca29a SDL constants are all uppercase.
Sam Lantinga <slouken@libsdl.org>
parents: 1912
diff changeset
236 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
1908
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diff changeset
237 data->current_screen = (data->current_screen + 1) % 3;
1895
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diff changeset
238 }
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diff changeset
239 }
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diff changeset
240
1908
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diff changeset
241 static void
1895
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parents:
diff changeset
242 SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
243 {
1912
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diff changeset
244 SDL_DUMMY_RenderData *data =
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diff changeset
245 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
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diff changeset
246 int i;
1895
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diff changeset
247
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
248 if (data) {
1908
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parents: 1907
diff changeset
249 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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diff changeset
250 if (data->screens[i]) {
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parents: 1907
diff changeset
251 SDL_FreeSurface(data->screens[i]);
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diff changeset
252 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
253 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254 SDL_free(data);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
255 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 SDL_free(renderer);
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parents:
diff changeset
257 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
258
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259 /* vi: set ts=4 sw=4 expandtab: */