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annotate src/video/SDL_renderer_sw.c @ 1683:396a35389351 SDL-1.3

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Finished palettized display handling. Added support for surface palette sharing.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 17 Jun 2006 06:45:14 +0000
parents 80a5e6a4e1e2
children c4aa1a2f48f1
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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
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27
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28 /* SDL surface based renderer implementation */
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29
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30 static SDL_Renderer *SDL_SW_CreateRenderer(SDL_Window * window, Uint32 flags);
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31 static int SDL_SW_CreateTexture(SDL_Renderer * renderer,
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32 SDL_Texture * texture);
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33 static int SDL_SW_QueryTexturePixels(SDL_Renderer * renderer,
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34 SDL_Texture * texture, void **pixels,
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35 int *pitch);
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36 static int SDL_SW_SetTexturePalette(SDL_Renderer * renderer,
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37 SDL_Texture * texture,
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38 const SDL_Color * colors, int firstcolor,
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39 int ncolors);
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40 static int SDL_SW_GetTexturePalette(SDL_Renderer * renderer,
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41 SDL_Texture * texture, SDL_Color * colors,
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42 int firstcolor, int ncolors);
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43 static int SDL_SW_UpdateTexture(SDL_Renderer * renderer,
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44 SDL_Texture * texture, const SDL_Rect * rect,
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45 const void *pixels, int pitch);
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46 static int SDL_SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
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47 const SDL_Rect * rect, int markDirty,
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48 void **pixels, int *pitch);
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49 static void SDL_SW_UnlockTexture(SDL_Renderer * renderer,
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50 SDL_Texture * texture);
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51 static void SDL_SW_DirtyTexture(SDL_Renderer * renderer,
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52 SDL_Texture * texture, int numrects,
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53 const SDL_Rect * rects);
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54 static void SDL_SW_SelectRenderTexture(SDL_Renderer * renderer,
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55 SDL_Texture * texture);
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56 static void SDL_SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
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57 Uint32 color);
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58 static int SDL_SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
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59 const SDL_Rect * srcrect,
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60 const SDL_Rect * dstrect, int blendMode,
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61 int scaleMode);
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62 static int SDL_SW_RenderReadPixels(SDL_Renderer * renderer,
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63 const SDL_Rect * rect, void *pixels,
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64 int pitch);
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65 static int SDL_SW_RenderWritePixels(SDL_Renderer * renderer,
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66 const SDL_Rect * rect, const void *pixels,
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67 int pitch);
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68 static void SDL_SW_RenderPresent(SDL_Renderer * renderer);
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69 static void SDL_SW_DestroyTexture(SDL_Renderer * renderer,
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70 SDL_Texture * texture);
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71 static void SDL_SW_DestroyRenderer(SDL_Renderer * renderer);
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72
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73
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74 SDL_RenderDriver SDL_SW_RenderDriver = {
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75 SDL_SW_CreateRenderer,
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76 {
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77 "software",
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78 (SDL_Renderer_PresentDiscard |
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79 SDL_Renderer_PresentCopy |
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80 SDL_Renderer_PresentFlip2 |
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81 SDL_Renderer_PresentFlip3 | SDL_Renderer_RenderTarget),
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82 (SDL_TextureBlendMode_None |
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83 SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend),
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84 (SDL_TextureScaleMode_None | SDL_TextureScaleMode_Fast),
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85 11,
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86 {
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87 SDL_PixelFormat_Index8,
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88 SDL_PixelFormat_RGB555,
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89 SDL_PixelFormat_RGB565,
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90 SDL_PixelFormat_RGB888,
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91 SDL_PixelFormat_BGR888,
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92 SDL_PixelFormat_ARGB8888,
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93 SDL_PixelFormat_RGBA8888,
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94 SDL_PixelFormat_ABGR8888,
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95 SDL_PixelFormat_BGRA8888,
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96 SDL_PixelFormat_YUY2,
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97 SDL_PixelFormat_UYVY},
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98 32768,
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99 32768}
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100 };
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101
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102 typedef struct
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103 {
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104 int current_screen;
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105 SDL_Surface *screens[3];
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106 SDL_Surface *target;
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107 SDL_Renderer *renderer;
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108 } SDL_SW_RenderData;
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109
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110 SDL_Renderer *
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111 SDL_SW_CreateRenderer(SDL_Window * window, Uint32 flags)
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112 {
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113 SDL_DisplayMode *displayMode = &window->display->current_mode;
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114 SDL_Renderer *renderer;
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115 SDL_SW_RenderData *data;
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116 int i, n;
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117 int bpp;
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118 Uint32 Rmask, Gmask, Bmask, Amask;
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119
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120 if (!SDL_PixelFormatEnumToMasks
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121 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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122 SDL_SetError("Unknown display format");
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123 return NULL;
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124 }
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125
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126 renderer = (SDL_Renderer *) SDL_malloc(sizeof(*renderer));
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127 if (!renderer) {
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128 SDL_OutOfMemory();
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129 return NULL;
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130 }
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131 SDL_zerop(renderer);
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132
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133 data = (SDL_SW_RenderData *) SDL_malloc(sizeof(*data));
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134 if (!data) {
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135 SDL_SW_DestroyRenderer(renderer);
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136 SDL_OutOfMemory();
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137 return NULL;
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138 }
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139 SDL_zerop(data);
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140
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141 renderer->CreateTexture = SDL_SW_CreateTexture;
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142 renderer->QueryTexturePixels = SDL_SW_QueryTexturePixels;
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143 renderer->SetTexturePalette = SDL_SW_SetTexturePalette;
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144 renderer->GetTexturePalette = SDL_SW_GetTexturePalette;
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145 renderer->UpdateTexture = SDL_SW_UpdateTexture;
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146 renderer->LockTexture = SDL_SW_LockTexture;
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147 renderer->UnlockTexture = SDL_SW_UnlockTexture;
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diff changeset
148 renderer->DirtyTexture = SDL_SW_DirtyTexture;
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diff changeset
149 renderer->SelectRenderTexture = SDL_SW_SelectRenderTexture;
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diff changeset
150 renderer->RenderFill = SDL_SW_RenderFill;
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diff changeset
151 renderer->RenderCopy = SDL_SW_RenderCopy;
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diff changeset
152 renderer->RenderReadPixels = SDL_SW_RenderReadPixels;
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diff changeset
153 renderer->RenderWritePixels = SDL_SW_RenderWritePixels;
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parents:
diff changeset
154 renderer->RenderPresent = SDL_SW_RenderPresent;
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diff changeset
155 renderer->DestroyTexture = SDL_SW_DestroyTexture;
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diff changeset
156 renderer->DestroyRenderer = SDL_SW_DestroyRenderer;
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diff changeset
157 renderer->info = SDL_SW_RenderDriver.info;
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diff changeset
158 renderer->window = window;
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diff changeset
159 renderer->driverdata = data;
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parents:
diff changeset
160
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diff changeset
161 renderer->info.flags = SDL_Renderer_RenderTarget;
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diff changeset
162
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diff changeset
163 if (flags & SDL_Renderer_PresentFlip2) {
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diff changeset
164 renderer->info.flags |= SDL_Renderer_PresentFlip2;
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diff changeset
165 n = 2;
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parents:
diff changeset
166 } else if (flags & SDL_Renderer_PresentFlip3) {
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diff changeset
167 renderer->info.flags |= SDL_Renderer_PresentFlip3;
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diff changeset
168 n = 3;
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diff changeset
169 } else {
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diff changeset
170 renderer->info.flags |= SDL_Renderer_PresentCopy;
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diff changeset
171 n = 1;
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parents:
diff changeset
172 }
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diff changeset
173 for (i = 0; i < n; ++i) {
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diff changeset
174 data->screens[i] =
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diff changeset
175 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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176 Bmask, Amask);
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177 if (!data->screens[i]) {
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178 SDL_SW_DestroyRenderer(renderer);
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179 return NULL;
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180 }
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181 SDL_SetSurfacePalette(data->screens[i], window->display->palette);
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182 }
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183 data->current_screen = 0;
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184 data->target = data->screens[0];
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185
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diff changeset
186 /* Find a render driver that we can use to display data */
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187 for (i = 0; i < window->display->num_render_drivers; ++i) {
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188 SDL_RenderDriver *driver = &window->display->render_drivers[i];
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189 if (driver->info.name != SDL_SW_RenderDriver.info.name) {
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diff changeset
190 data->renderer =
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191 driver->CreateRenderer(window, SDL_Renderer_PresentDiscard);
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diff changeset
192 if (data->renderer) {
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diff changeset
193 break;
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194 }
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195 }
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196 }
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diff changeset
197 if (i == window->display->num_render_drivers) {
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198 SDL_SW_DestroyRenderer(renderer);
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199 SDL_SetError("Couldn't find display render driver");
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diff changeset
200 return NULL;
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diff changeset
201 }
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diff changeset
202 return renderer;
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diff changeset
203 }
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204
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205 static int
1676
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206 SDL_SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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diff changeset
207 {
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diff changeset
208 SDL_Surface *surface;
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diff changeset
209 int bpp;
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diff changeset
210 Uint32 Rmask, Gmask, Bmask, Amask;
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diff changeset
211
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diff changeset
212 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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parents:
diff changeset
213 /* FIXME: implement this */
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diff changeset
214 return -1;
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parents:
diff changeset
215 }
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
216
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parents:
diff changeset
217 if (!SDL_PixelFormatEnumToMasks
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
218 (texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
219 SDL_SetError("Unknown texture format");
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
220 return -1;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
221 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
222
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
223 surface =
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parents:
diff changeset
224 SDL_CreateRGBSurface(0, texture->w, texture->h, bpp, Rmask, Gmask,
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
225 Bmask, Amask);
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
226 if (!surface) {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
227 return -1;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
228 }
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
229
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
230 texture->driverdata = surface;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
231 return 0;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
232 }
e136f3ffdc1b Adding software renderer implementation
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diff changeset
233
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diff changeset
234 static int
1678
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
235 SDL_SW_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
90bf530ced8e SDL_SetVideoMode() compiles now...
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parents: 1676
diff changeset
236 void **pixels, int *pitch)
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
parents: 1676
diff changeset
237 {
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
parents: 1676
diff changeset
238 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
239
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
240 *pixels = surface->pixels;
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
241 *pitch = surface->pitch;
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
parents: 1676
diff changeset
242 return 0;
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
parents: 1676
diff changeset
243 }
90bf530ced8e SDL_SetVideoMode() compiles now...
Sam Lantinga <slouken@libsdl.org>
parents: 1676
diff changeset
244
1680
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
245 static int
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
246 SDL_SW_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
1681
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
247 const SDL_Color * colors, int firstcolor,
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
248 int ncolors)
1680
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
249 {
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
250 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
251
1683
396a35389351 Finished palettized display handling.
Sam Lantinga <slouken@libsdl.org>
parents: 1681
diff changeset
252 return SDL_SetPaletteColors(surface->format->palette, colors, firstcolor,
396a35389351 Finished palettized display handling.
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parents: 1681
diff changeset
253 ncolors);
1680
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
254 }
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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diff changeset
255
9488fca10677 Dummy video driver works again in high color video modes. Yay!
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parents: 1678
diff changeset
256 static int
1681
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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diff changeset
257 SDL_SW_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
258 SDL_Color * colors, int firstcolor, int ncolors)
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
259 {
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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diff changeset
260 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
261
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
262 SDL_memcpy(colors, &surface->format->palette->colors[firstcolor],
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
263 ncolors * sizeof(*colors));
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
264 return 0;
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
265 }
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
Sam Lantinga <slouken@libsdl.org>
parents: 1680
diff changeset
266
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
267 static int
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e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
268 SDL_SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
1681
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
269 const SDL_Rect * rect, const void *pixels, int pitch)
1676
e136f3ffdc1b Adding software renderer implementation
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diff changeset
270 {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
271 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
272 Uint8 *src, *dst;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
273 int row;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
274 size_t length;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
275
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
276 src = (Uint8 *) pixels;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
277 dst =
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
278 (Uint8 *) surface->pixels + rect->y * surface->pitch +
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
279 rect->x * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
280 length = rect->w * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
281 for (row = 0; row < rect->h; ++row) {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
282 SDL_memcpy(dst, src, length);
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
283 src += pitch;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
284 dst += surface->pitch;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
285 }
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
286 return 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
287 }
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
288
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diff changeset
289 static int
1676
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
290 SDL_SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
1681
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parents: 1680
diff changeset
291 const SDL_Rect * rect, int markDirty, void **pixels,
80a5e6a4e1e2 Working on paletted display and texture support (two different issues)
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parents: 1680
diff changeset
292 int *pitch)
1676
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parents:
diff changeset
293 {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
294 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
295
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
296 *pixels =
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
297 (void *) ((Uint8 *) surface->pixels + rect->y * surface->pitch +
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
298 rect->x * surface->format->BytesPerPixel);
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299 *pitch = surface->pitch;
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diff changeset
300 return 0;
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diff changeset
301 }
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diff changeset
302
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303 static void
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304 SDL_SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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305 {
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306 }
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diff changeset
307
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diff changeset
308 static void
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diff changeset
309 SDL_SW_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
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310 int numrects, const SDL_Rect * rects)
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311 {
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312 }
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diff changeset
313
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diff changeset
314 static void
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315 SDL_SW_SelectRenderTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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parents:
diff changeset
316 {
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317 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
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318
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319 if (texture) {
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320 data->target = (SDL_Surface *) texture->driverdata;
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321 } else {
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322 data->target = data->screens[data->current_screen];
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323 }
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324 }
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325
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326 static void
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327 SDL_SW_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
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328 Uint32 color)
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329 {
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330 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
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331 SDL_Rect real_rect = *rect;
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332 Uint8 r, g, b, a;
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333
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334 a = (Uint8) ((color >> 24) & 0xFF);
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335 r = (Uint8) ((color >> 16) & 0xFF);
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336 g = (Uint8) ((color >> 8) & 0xFF);
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337 b = (Uint8) (color & 0xFF);
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338 color = SDL_MapRGBA(data->target->format, r, g, b, a);
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339
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340 SDL_FillRect(data->target, &real_rect, color);
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341 }
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342
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343 static int
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344 SDL_SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
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345 const SDL_Rect * srcrect, const SDL_Rect * dstrect,
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346 int blendMode, int scaleMode)
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347 {
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348 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
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349 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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350 SDL_Rect real_srcrect = *srcrect;
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351 SDL_Rect real_dstrect = *dstrect;
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352
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353 if (blendMode & (SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend)) {
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354 SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
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355 } else {
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356 SDL_SetAlpha(surface, 0, 0);
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357 }
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diff changeset
358 if (scaleMode != SDL_TextureScaleMode_None &&
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diff changeset
359 (srcrect->w != dstrect->w || srcrect->h != dstrect->h)) {
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360 return SDL_SoftStretch(surface, &real_srcrect, data->target,
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diff changeset
361 &real_dstrect);
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362 } else {
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diff changeset
363 return SDL_LowerBlit(surface, &real_srcrect, data->target,
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diff changeset
364 &real_dstrect);
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diff changeset
365 }
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parents:
diff changeset
366 }
e136f3ffdc1b Adding software renderer implementation
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diff changeset
367
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diff changeset
368 static int
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diff changeset
369 SDL_SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
1676
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diff changeset
370 void *pixels, int pitch)
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parents:
diff changeset
371 {
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diff changeset
372 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
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diff changeset
373 SDL_Surface *surface = data->target;
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diff changeset
374 Uint8 *src, *dst;
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diff changeset
375 int row;
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parents:
diff changeset
376 size_t length;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
377
e136f3ffdc1b Adding software renderer implementation
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diff changeset
378 src =
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diff changeset
379 (Uint8 *) surface->pixels + rect->y * surface->pitch +
e136f3ffdc1b Adding software renderer implementation
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diff changeset
380 rect->x * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
381 dst = (Uint8 *) pixels;
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diff changeset
382 length = rect->w * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
383 for (row = 0; row < rect->h; ++row) {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
384 SDL_memcpy(dst, src, length);
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
385 src += surface->pitch;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
386 dst += pitch;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
387 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
388 return 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
389 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
390
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diff changeset
391 static int
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diff changeset
392 SDL_SW_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
1676
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diff changeset
393 const void *pixels, int pitch)
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
394 {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
395 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
396 SDL_Surface *surface = data->target;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
397 Uint8 *src, *dst;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
398 int row;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
399 size_t length;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
400
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
401 src = (Uint8 *) pixels;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
402 dst =
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
403 (Uint8 *) surface->pixels + rect->y * surface->pitch +
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
404 rect->x * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
405 length = rect->w * surface->format->BytesPerPixel;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
406 for (row = 0; row < rect->h; ++row) {
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
407 SDL_memcpy(dst, src, length);
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
408 src += pitch;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
409 dst += surface->pitch;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
410 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
411 return 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
412 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
413
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diff changeset
414 static void
1676
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
415 SDL_SW_RenderPresent(SDL_Renderer * renderer)
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
416 {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
417 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
418 SDL_Surface *surface = data->screens[data->current_screen];
e136f3ffdc1b Adding software renderer implementation
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parents:
diff changeset
419 SDL_Rect rect;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
420 int new_screen;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
421
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
422 /* Send the data to the display */
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
423 /* FIXME: implement dirty rect updates */
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
424 rect.x = 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
425 rect.y = 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
426 rect.w = surface->w;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
427 rect.h = surface->h;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
428 data->renderer->RenderWritePixels(data->renderer, &rect, surface->pixels,
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
429 surface->pitch);
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
430 data->renderer->RenderPresent(data->renderer);
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
431
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
432 /* Update the flipping chain, if any */
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
433 if (renderer->info.flags & SDL_Renderer_PresentFlip2) {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
434 new_screen = (data->current_screen + 1) % 2;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
435 } else if (renderer->info.flags & SDL_Renderer_PresentFlip3) {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
436 new_screen = (data->current_screen + 1) % 3;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
437 } else {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
438 new_screen = 0;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
439 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
440 if (data->target == data->screens[data->current_screen]) {
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
441 data->target = data->screens[new_screen];
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
442 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
443 data->current_screen = new_screen;
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
444 }
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
445
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diff changeset
446 static void
1676
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
447 SDL_SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
e136f3ffdc1b Adding software renderer implementation
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
448 {
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449 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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450
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451 SDL_FreeSurface(surface);
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452 }
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453
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9488fca10677 Dummy video driver works again in high color video modes. Yay!
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454 static void
1676
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455 SDL_SW_DestroyRenderer(SDL_Renderer * renderer)
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456 {
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457 SDL_SW_RenderData *data = (SDL_SW_RenderData *) renderer->driverdata;
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458 int i;
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459
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460 if (data) {
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461 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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462 if (data->screens[i]) {
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463 SDL_FreeSurface(data->screens[i]);
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464 }
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465 }
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466 SDL_free(data);
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467 }
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468 SDL_free(renderer);
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469 }
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470
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471 /* vi: set ts=4 sw=4 expandtab: */