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annotate src/video/dummy/SDL_nullrender.c @ 2236:741afd8402cf

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author Sam Lantinga <slouken@libsdl.org>
date Sun, 12 Aug 2007 18:53:51 +0000
parents bb67fd5ccfdb
children bee005ace1bf
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 #include "../SDL_rendercopy.h"
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29
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30
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31 /* SDL surface based renderer implementation */
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32
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33 static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
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34 Uint32 flags);
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35 static int SDL_DUMMY_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
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36 Uint8 b, Uint8 a, const SDL_Rect * rect);
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37 static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer,
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38 SDL_Texture * texture,
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39 const SDL_Rect * srcrect,
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40 const SDL_Rect * dstrect);
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41 static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
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42 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
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43
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44
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45 SDL_RenderDriver SDL_DUMMY_RenderDriver = {
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46 SDL_DUMMY_CreateRenderer,
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47 {
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48 "dummy",
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49 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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50 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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51 SDL_RENDERER_PRESENTDISCARD),
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52 }
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53 };
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54
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55 typedef struct
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56 {
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57 int current_screen;
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58 SDL_Surface *screens[3];
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59 } SDL_DUMMY_RenderData;
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60
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61 SDL_Renderer *
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62 SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
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63 {
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64 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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65 SDL_DisplayMode *displayMode = &display->current_mode;
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66 SDL_Renderer *renderer;
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67 SDL_DUMMY_RenderData *data;
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68 int i, n;
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69 int bpp;
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70 Uint32 Rmask, Gmask, Bmask, Amask;
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71
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72 if (!SDL_PixelFormatEnumToMasks
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73 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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74 SDL_SetError("Unknown display format");
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75 return NULL;
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76 }
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77
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78 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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79 if (!renderer) {
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80 SDL_OutOfMemory();
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81 return NULL;
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82 }
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83
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84 data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
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85 if (!data) {
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86 SDL_DUMMY_DestroyRenderer(renderer);
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87 SDL_OutOfMemory();
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88 return NULL;
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89 }
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90 SDL_zerop(data);
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91
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92 renderer->RenderFill = SDL_DUMMY_RenderFill;
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93 renderer->RenderCopy = SDL_DUMMY_RenderCopy;
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94 renderer->RenderPresent = SDL_DUMMY_RenderPresent;
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95 renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
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96 renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
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97 renderer->info.flags = 0;
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98 renderer->window = window->id;
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99 renderer->driverdata = data;
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100 Setup_SoftwareRenderer(renderer);
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101
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102 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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103 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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104 n = 2;
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105 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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106 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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107 n = 3;
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108 } else {
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109 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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110 n = 1;
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111 }
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112 for (i = 0; i < n; ++i) {
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113 data->screens[i] =
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114 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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115 Bmask, Amask);
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116 if (!data->screens[i]) {
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117 SDL_DUMMY_DestroyRenderer(renderer);
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118 return NULL;
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119 }
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120 SDL_SetSurfacePalette(data->screens[i], display->palette);
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121 }
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122 data->current_screen = 0;
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123
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124 return renderer;
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125 }
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126
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127 static int
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128 SDL_DUMMY_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
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129 Uint8 a, const SDL_Rect * rect)
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130 {
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diff changeset
131 SDL_DUMMY_RenderData *data =
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132 (SDL_DUMMY_RenderData *) renderer->driverdata;
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diff changeset
133 SDL_Surface *target = data->screens[data->current_screen];
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diff changeset
134 Uint32 color;
1908
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diff changeset
135 SDL_Rect real_rect = *rect;
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diff changeset
136
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diff changeset
137 color = SDL_MapRGBA(target->format, r, g, b, a);
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138
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diff changeset
139 return SDL_FillRect(target, &real_rect, color);
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diff changeset
140 }
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diff changeset
141
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diff changeset
142 static int
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diff changeset
143 SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
1985
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144 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
1908
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145 {
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146 SDL_DUMMY_RenderData *data =
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147 (SDL_DUMMY_RenderData *) renderer->driverdata;
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148 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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149 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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150
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diff changeset
151 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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152 SDL_Surface *target = data->screens[data->current_screen];
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153 void *pixels =
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154 (Uint8 *) target->pixels + dstrect->y * target->pitch +
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155 dstrect->x * target->format->BytesPerPixel;
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156 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
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157 srcrect, display->current_mode.format,
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158 dstrect->w, dstrect->h, pixels,
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diff changeset
159 target->pitch);
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diff changeset
160 } else {
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diff changeset
161 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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diff changeset
162 SDL_Surface *target = data->screens[data->current_screen];
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163 SDL_RenderCopyFunc copyfunc = (SDL_RenderCopyFunc) surface->userdata;
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164
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diff changeset
165 if (copyfunc) {
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166 SDL_RenderCopyData copydata;
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167
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168 copydata.src =
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diff changeset
169 (Uint8 *) surface->pixels + srcrect->y * surface->pitch +
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diff changeset
170 srcrect->x * surface->format->BytesPerPixel;
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diff changeset
171 copydata.src_w = srcrect->w;
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172 copydata.src_h = srcrect->h;
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173 copydata.src_pitch = surface->pitch;
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diff changeset
174 copydata.dst =
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175 (Uint8 *) target->pixels + dstrect->y * target->pitch +
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diff changeset
176 dstrect->x * target->format->BytesPerPixel;
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177 copydata.dst_w = dstrect->w;
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178 copydata.dst_h = dstrect->h;
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179 copydata.dst_pitch = target->pitch;
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180 copydata.flags = 0;
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diff changeset
181 if (texture->modMode & SDL_TEXTUREMODULATE_COLOR) {
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182 copydata.flags |= SDL_RENDERCOPY_MODULATE_COLOR;
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diff changeset
183 copydata.r = texture->r;
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184 copydata.g = texture->g;
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185 copydata.b = texture->b;
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diff changeset
186 }
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187 if (texture->modMode & SDL_TEXTUREMODULATE_ALPHA) {
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188 copydata.flags |= SDL_RENDERCOPY_MODULATE_ALPHA;
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diff changeset
189 copydata.a = texture->a;
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diff changeset
190 }
1990
7b573c59cb1f The dummy renderer can task advantage of the MASK optimization too, though performance probably doesn't matter here...
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diff changeset
191 if (texture->blendMode & SDL_TEXTUREBLENDMODE_MASK) {
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diff changeset
192 copydata.flags |= SDL_RENDERCOPY_MASK;
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diff changeset
193 } else if (texture->blendMode & SDL_TEXTUREBLENDMODE_BLEND) {
1985
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194 copydata.flags |= SDL_RENDERCOPY_BLEND;
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diff changeset
195 } else if (texture->blendMode & SDL_TEXTUREBLENDMODE_ADD) {
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diff changeset
196 copydata.flags |= SDL_RENDERCOPY_ADD;
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diff changeset
197 } else if (texture->blendMode & SDL_TEXTUREBLENDMODE_MOD) {
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diff changeset
198 copydata.flags |= SDL_RENDERCOPY_MOD;
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199 }
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diff changeset
200 if (texture->scaleMode) {
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diff changeset
201 copydata.flags |= SDL_RENDERCOPY_NEAREST;
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diff changeset
202 }
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diff changeset
203 return copyfunc(&copydata);
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diff changeset
204 } else {
1985
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diff changeset
205 SDL_Rect real_srcrect = *srcrect;
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diff changeset
206 SDL_Rect real_dstrect = *dstrect;
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diff changeset
207
1912
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diff changeset
208 return SDL_LowerBlit(surface, &real_srcrect, target,
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diff changeset
209 &real_dstrect);
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diff changeset
210 }
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diff changeset
211 }
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diff changeset
212 }
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diff changeset
213
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diff changeset
214 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
215 SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
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parents:
diff changeset
216 {
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parents:
diff changeset
217 static int frame_number;
1912
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diff changeset
218 SDL_DUMMY_RenderData *data =
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diff changeset
219 (SDL_DUMMY_RenderData *) renderer->driverdata;
1895
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parents:
diff changeset
220
1908
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diff changeset
221 /* Send the data to the display */
1895
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parents:
diff changeset
222 if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
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parents:
diff changeset
223 char file[128];
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parents:
diff changeset
224 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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parents:
diff changeset
225 renderer->window, ++frame_number);
1908
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parents: 1907
diff changeset
226 SDL_SaveBMP(data->screens[data->current_screen], file);
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diff changeset
227 }
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
228
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parents: 1907
diff changeset
229 /* Update the flipping chain, if any */
1965
a788656ca29a SDL constants are all uppercase.
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parents: 1912
diff changeset
230 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
231 data->current_screen = (data->current_screen + 1) % 2;
1965
a788656ca29a SDL constants are all uppercase.
Sam Lantinga <slouken@libsdl.org>
parents: 1912
diff changeset
232 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
233 data->current_screen = (data->current_screen + 1) % 3;
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
234 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
235 }
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
236
1908
e079dafea2bf Implemented fully featured dummy renderer
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diff changeset
237 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
238 SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
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
239 {
1912
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
240 SDL_DUMMY_RenderData *data =
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
241 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
242 int i;
1895
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
243
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
244 if (data) {
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
245 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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parents: 1907
diff changeset
246 if (data->screens[i]) {
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
247 SDL_FreeSurface(data->screens[i]);
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
248 }
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
249 }
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
250 SDL_free(data);
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
251 }
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
252 SDL_free(renderer);
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
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
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
255 /* vi: set ts=4 sw=4 expandtab: */