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annotate src/video/dummy/SDL_nullrender.c @ 2888:32e8bbba1e94

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Added stubs for software implementations of blending fills and line drawing
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 13:14:28 +0000
parents 9dde605c7540
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,
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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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diff changeset
209 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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diff changeset
210 SDL_Surface *target = data->screens[data->current_screen];
2267
c785543d1843 Okay, still some bugs, but everything builds again...
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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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parents:
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
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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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parents:
diff changeset
247
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
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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parents:
diff changeset
256 SDL_free(renderer);
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Sam Lantinga <slouken@libsdl.org>
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: */