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annotate src/video/dummy/SDL_nullrender.c @ 2702:11eb9ae3c88c

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Reverted revision 3416, fixing bug #589 http://bugzilla.libsdl.org/show_bug.cgi?id=589 I was going to add the current window to the OpenGL context info, but that doesn't fix the case where you set the current context to NULL and then set the current context to the same window it had before. This also doesn't take into account changes to the window that might affect the context, such as viewport changing or fullscreen/windowed mode changing. Any ideas?
author Sam Lantinga <slouken@libsdl.org>
date Mon, 26 May 2008 12:43:37 +0000
parents c785543d1843
children c3e7c0698cbb 99210400e8b9
rev   line source
1895
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
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35 Uint8 b, Uint8 a, const SDL_Rect * rect);
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36 static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer,
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37 SDL_Texture * texture,
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38 const SDL_Rect * srcrect,
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39 const SDL_Rect * dstrect);
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40 static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
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41 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
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42
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43
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44 SDL_RenderDriver SDL_DUMMY_RenderDriver = {
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45 SDL_DUMMY_CreateRenderer,
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46 {
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47 "dummy",
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48 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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49 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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50 SDL_RENDERER_PRESENTDISCARD),
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51 }
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52 };
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53
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54 typedef struct
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55 {
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56 int current_screen;
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57 SDL_Surface *screens[3];
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58 } SDL_DUMMY_RenderData;
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59
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60 SDL_Renderer *
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61 SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
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62 {
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63 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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64 SDL_DisplayMode *displayMode = &display->current_mode;
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65 SDL_Renderer *renderer;
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66 SDL_DUMMY_RenderData *data;
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67 int i, n;
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68 int bpp;
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69 Uint32 Rmask, Gmask, Bmask, Amask;
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70
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71 if (!SDL_PixelFormatEnumToMasks
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72 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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73 SDL_SetError("Unknown display format");
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74 return NULL;
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75 }
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76
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77 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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78 if (!renderer) {
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79 SDL_OutOfMemory();
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80 return NULL;
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81 }
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82
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83 data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
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84 if (!data) {
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85 SDL_DUMMY_DestroyRenderer(renderer);
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86 SDL_OutOfMemory();
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87 return NULL;
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88 }
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89 SDL_zerop(data);
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90
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91 renderer->RenderFill = SDL_DUMMY_RenderFill;
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92 renderer->RenderCopy = SDL_DUMMY_RenderCopy;
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93 renderer->RenderPresent = SDL_DUMMY_RenderPresent;
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94 renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
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95 renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
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96 renderer->info.flags = 0;
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97 renderer->window = window->id;
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98 renderer->driverdata = data;
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99 Setup_SoftwareRenderer(renderer);
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100
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101 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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102 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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103 n = 2;
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104 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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105 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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106 n = 3;
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107 } else {
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108 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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109 n = 1;
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110 }
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111 for (i = 0; i < n; ++i) {
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112 data->screens[i] =
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113 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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114 Bmask, Amask);
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115 if (!data->screens[i]) {
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116 SDL_DUMMY_DestroyRenderer(renderer);
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117 return NULL;
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118 }
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119 SDL_SetSurfacePalette(data->screens[i], display->palette);
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120 }
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121 data->current_screen = 0;
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122
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123 return renderer;
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124 }
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125
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126 static int
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127 SDL_DUMMY_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
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128 Uint8 a, const SDL_Rect * rect)
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129 {
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130 SDL_DUMMY_RenderData *data =
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131 (SDL_DUMMY_RenderData *) renderer->driverdata;
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132 SDL_Surface *target = data->screens[data->current_screen];
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133 Uint32 color;
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134 SDL_Rect real_rect = *rect;
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135
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136 color = SDL_MapRGBA(target->format, r, g, b, a);
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137
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138 return SDL_FillRect(target, &real_rect, color);
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139 }
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140
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141 static int
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142 SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
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143 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
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144 {
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145 SDL_DUMMY_RenderData *data =
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146 (SDL_DUMMY_RenderData *) renderer->driverdata;
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147 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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148 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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149
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150 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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151 SDL_Surface *target = data->screens[data->current_screen];
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152 void *pixels =
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153 (Uint8 *) target->pixels + dstrect->y * target->pitch +
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154 dstrect->x * target->format->BytesPerPixel;
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155 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
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156 srcrect, display->current_mode.format,
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157 dstrect->w, dstrect->h, pixels,
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158 target->pitch);
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159 } else {
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160 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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161 SDL_Surface *target = data->screens[data->current_screen];
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162 SDL_Rect real_srcrect = *srcrect;
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163 SDL_Rect real_dstrect = *dstrect;
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164
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165 return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
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166 }
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167 }
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168
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169 static void
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170 SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
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171 {
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172 static int frame_number;
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173 SDL_DUMMY_RenderData *data =
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174 (SDL_DUMMY_RenderData *) renderer->driverdata;
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175
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176 /* Send the data to the display */
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177 if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
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178 char file[128];
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179 SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
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180 renderer->window, ++frame_number);
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181 SDL_SaveBMP(data->screens[data->current_screen], file);
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182 }
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183
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184 /* Update the flipping chain, if any */
1965
a788656ca29a SDL constants are all uppercase.
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diff changeset
185 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
1908
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186 data->current_screen = (data->current_screen + 1) % 2;
1965
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187 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
1908
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188 data->current_screen = (data->current_screen + 1) % 3;
1895
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189 }
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190 }
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191
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diff changeset
192 static void
1895
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193 SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
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194 {
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195 SDL_DUMMY_RenderData *data =
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196 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
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diff changeset
197 int i;
1895
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198
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199 if (data) {
1908
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diff changeset
200 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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diff changeset
201 if (data->screens[i]) {
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diff changeset
202 SDL_FreeSurface(data->screens[i]);
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diff changeset
203 }
1895
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diff changeset
204 }
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parents:
diff changeset
205 SDL_free(data);
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parents:
diff changeset
206 }
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parents:
diff changeset
207 SDL_free(renderer);
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parents:
diff changeset
208 }
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
209
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
210 /* vi: set ts=4 sw=4 expandtab: */