annotate src/video/dummy/SDL_nullrender.c @ 3473:7bdc10624cba

This is terrible, but the OpenGL standard says that lines are half open, which means that one endpoint is not covered so adjoining lines don't overlap. It also doesn't define which end is open, and indeed Mac OS X and Linux differ. Mac OS X seems to leave the second endpoint open, but Linux uses the right-most endpoint for x major lines and the bottom-most endpoint for y major lines.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Nov 2009 07:14:21 +0000
parents a65f7b3a2524
children 0267b8b1595c
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "../SDL_sysvideo.h"
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26 #include "../SDL_yuv_sw_c.h"
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27 #include "../SDL_renderer_sw.h"
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28
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29
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30 /* SDL surface based renderer implementation */
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31
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32 static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
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33 Uint32 flags);
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34 static int SDL_DUMMY_RenderPoint(SDL_Renderer * renderer, int x, int y);
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35 static int SDL_DUMMY_RenderLine(SDL_Renderer * renderer, int x1, int y1,
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36 int x2, int y2);
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37 static int SDL_DUMMY_RenderFill(SDL_Renderer * renderer,
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38 const SDL_Rect * rect);
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39 static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer,
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40 SDL_Texture * texture,
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41 const SDL_Rect * srcrect,
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42 const SDL_Rect * dstrect);
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43 static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,
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44 const SDL_Rect * rect,
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45 Uint32 format,
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46 void * pixels, int pitch);
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47 static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,
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48 const SDL_Rect * rect,
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49 Uint32 format,
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50 const void * pixels, int pitch);
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51 static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
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52 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
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53
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54
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55 SDL_RenderDriver SDL_DUMMY_RenderDriver = {
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56 SDL_DUMMY_CreateRenderer,
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57 {
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58 "dummy",
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59 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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60 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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61 SDL_RENDERER_PRESENTDISCARD),
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62 }
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63 };
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64
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65 typedef struct
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66 {
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67 int current_screen;
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68 SDL_Surface *screens[3];
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69 } SDL_DUMMY_RenderData;
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70
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71 SDL_Renderer *
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72 SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
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73 {
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74 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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75 SDL_DisplayMode *displayMode = &display->current_mode;
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76 SDL_Renderer *renderer;
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77 SDL_DUMMY_RenderData *data;
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78 int i, n;
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79 int bpp;
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80 Uint32 Rmask, Gmask, Bmask, Amask;
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81
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82 if (!SDL_PixelFormatEnumToMasks
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83 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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84 SDL_SetError("Unknown display format");
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85 return NULL;
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86 }
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87
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88 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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89 if (!renderer) {
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90 SDL_OutOfMemory();
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91 return NULL;
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92 }
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93
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94 data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
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95 if (!data) {
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96 SDL_DUMMY_DestroyRenderer(renderer);
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97 SDL_OutOfMemory();
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98 return NULL;
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99 }
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100 SDL_zerop(data);
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101
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102 renderer->RenderPoint = SDL_DUMMY_RenderPoint;
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103 renderer->RenderLine = SDL_DUMMY_RenderLine;
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104 renderer->RenderFill = SDL_DUMMY_RenderFill;
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105 renderer->RenderCopy = SDL_DUMMY_RenderCopy;
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106 renderer->RenderReadPixels = SDL_DUMMY_RenderReadPixels;
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107 renderer->RenderWritePixels = SDL_DUMMY_RenderWritePixels;
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108 renderer->RenderPresent = SDL_DUMMY_RenderPresent;
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109 renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
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110 renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
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111 renderer->info.flags = 0;
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112 renderer->window = window->id;
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113 renderer->driverdata = data;
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114 Setup_SoftwareRenderer(renderer);
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115
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116 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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117 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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118 n = 2;
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119 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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120 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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121 n = 3;
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122 } else {
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123 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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124 n = 1;
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125 }
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diff changeset
126 for (i = 0; i < n; ++i) {
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diff changeset
127 data->screens[i] =
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parents: 1907
diff changeset
128 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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parents: 1907
diff changeset
129 Bmask, Amask);
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parents: 1907
diff changeset
130 if (!data->screens[i]) {
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parents: 1907
diff changeset
131 SDL_DUMMY_DestroyRenderer(renderer);
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parents: 1907
diff changeset
132 return NULL;
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
133 }
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Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
134 SDL_SetSurfacePalette(data->screens[i], display->palette);
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
135 }
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
136 data->current_screen = 0;
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
137
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
138 return 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
139 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
diff changeset
140
1908
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parents: 1907
diff changeset
141 static int
2901
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parents: 2888
diff changeset
142 SDL_DUMMY_RenderPoint(SDL_Renderer * renderer, int x, int y)
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
143 {
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parents: 2888
diff changeset
144 SDL_DUMMY_RenderData *data =
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
145 (SDL_DUMMY_RenderData *) renderer->driverdata;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
146 SDL_Surface *target = data->screens[data->current_screen];
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
147 int status;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
148
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
149 if (renderer->blendMode == SDL_BLENDMODE_NONE ||
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
150 renderer->blendMode == SDL_BLENDMODE_MASK) {
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
151 Uint32 color =
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
152 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
153 renderer->a);
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parents: 2888
diff changeset
154
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
155 status = SDL_DrawPoint(target, x, y, color);
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
156 } else {
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
157 status =
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
158 SDL_BlendPoint(target, x, y, renderer->blendMode, renderer->r,
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
159 renderer->g, renderer->b, renderer->a);
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
160 }
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
161 return status;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
162 }
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
163
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
164 static int
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
165 SDL_DUMMY_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
166 {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
167 SDL_DUMMY_RenderData *data =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
168 (SDL_DUMMY_RenderData *) renderer->driverdata;
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
169 SDL_Surface *target = data->screens[data->current_screen];
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
170 int status;
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
171
2901
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
172 if (renderer->blendMode == SDL_BLENDMODE_NONE ||
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
173 renderer->blendMode == SDL_BLENDMODE_MASK) {
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
174 Uint32 color =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
175 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
176 renderer->a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
177
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
178 status = SDL_DrawLine(target, x1, y1, x2, y2, color);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
179 } else {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
180 status =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
181 SDL_BlendLine(target, x1, y1, x2, y2, renderer->blendMode,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
182 renderer->r, renderer->g, renderer->b, renderer->a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
183 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
184 return status;
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
185 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
186
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
187 static int
2884
9dde605c7540 Date: Fri, 19 Dec 2008 20:17:35 +0100
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parents: 2859
diff changeset
188 SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
189 {
1912
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
190 SDL_DUMMY_RenderData *data =
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
191 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
192 SDL_Surface *target = data->screens[data->current_screen];
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
193 SDL_Rect real_rect = *rect;
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
194 int status;
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
195
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
196 if (renderer->blendMode == SDL_BLENDMODE_NONE) {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
197 Uint32 color =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
198 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
199 renderer->a);
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
200
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
201 status = SDL_FillRect(target, &real_rect, color);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
202 } else {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2884
diff changeset
203 status =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
204 SDL_BlendRect(target, &real_rect, renderer->blendMode,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2884
diff changeset
205 renderer->r, renderer->g, renderer->b, renderer->a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2884
diff changeset
206 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2884
diff changeset
207 return status;
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
208 }
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
209
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
210 static int
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
211 SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1965
diff changeset
212 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
213 {
1912
8d384b647307 Setting up the OpenGL support
Sam Lantinga <slouken@libsdl.org>
parents: 1908
diff changeset
214 SDL_DUMMY_RenderData *data =
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
215 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
216 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
217 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
218
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
219 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
220 SDL_Surface *target = data->screens[data->current_screen];
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
221 void *pixels =
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
222 (Uint8 *) target->pixels + dstrect->y * target->pitch +
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
223 dstrect->x * target->format->BytesPerPixel;
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
224 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
225 srcrect, display->current_mode.format,
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
226 dstrect->w, dstrect->h, pixels,
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
227 target->pitch);
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
228 } else {
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
229 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
230 SDL_Surface *target = data->screens[data->current_screen];
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
231 SDL_Rect real_srcrect = *srcrect;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
232 SDL_Rect real_dstrect = *dstrect;
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
233
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
234 return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
235 }
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
236 }
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
237
3451
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
238 static int
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
239 SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
240 Uint32 format, void * pixels, int pitch)
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
241 {
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
242 SDL_DUMMY_RenderData *data =
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
243 (SDL_DUMMY_RenderData *) renderer->driverdata;
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
244 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
245 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
246 SDL_Surface *screen = data->screens[data->current_screen];
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
247 Uint32 screen_format = display->current_mode.format;
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
248 Uint8 *screen_pixels = (Uint8 *) screen->pixels +
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
249 rect->y * screen->pitch +
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
250 rect->x * screen->format->BytesPerPixel;
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
251 int screen_pitch = screen->pitch;
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
252
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
253 return SDL_ConvertPixels(rect->w, rect->h,
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
254 screen_format, screen_pixels, screen_pitch,
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
255 format, pixels, pitch);
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
256 }
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
257
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
parents: 2927
diff changeset
258 static int
a65f7b3a2524 Implemented SDL_RenderReadPixels()/SDL_RenderWritePixels() for the dummy renderer.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
259 SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
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260 Uint32 format, const void * pixels, int pitch)
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261 {
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262 SDL_DUMMY_RenderData *data =
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263 (SDL_DUMMY_RenderData *) renderer->driverdata;
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264 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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265 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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266 SDL_Surface *screen = data->screens[data->current_screen];
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267 Uint32 screen_format = display->current_mode.format;
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268 Uint8 *screen_pixels = (Uint8 *) screen->pixels +
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269 rect->y * screen->pitch +
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270 rect->x * screen->format->BytesPerPixel;
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271 int screen_pitch = screen->pitch;
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272
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273 return SDL_ConvertPixels(rect->w, rect->h,
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274 format, pixels, pitch,
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275 screen_format, screen_pixels, screen_pitch);
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276 }
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277
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278 static void
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279 SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
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280 {
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281 static int frame_number;
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282 SDL_DUMMY_RenderData *data =
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283 (SDL_DUMMY_RenderData *) renderer->driverdata;
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284
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285 /* Send the data to the display */
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286 if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
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287 char file[128];
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288 SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
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289 renderer->window, ++frame_number);
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290 SDL_SaveBMP(data->screens[data->current_screen], file);
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291 }
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292
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293 /* Update the flipping chain, if any */
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294 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
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295 data->current_screen = (data->current_screen + 1) % 2;
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296 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
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297 data->current_screen = (data->current_screen + 1) % 3;
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298 }
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299 }
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300
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301 static void
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302 SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
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303 {
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304 SDL_DUMMY_RenderData *data =
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305 (SDL_DUMMY_RenderData *) renderer->driverdata;
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306 int i;
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307
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308 if (data) {
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309 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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310 if (data->screens[i]) {
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311 SDL_FreeSurface(data->screens[i]);
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312 }
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313 }
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314 SDL_free(data);
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315 }
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316 SDL_free(renderer);
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317 }
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318
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319 /* vi: set ts=4 sw=4 expandtab: */