annotate src/video/dummy/SDL_nullrender.c @ 3406:8ae607392409

There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct value after the first scanline. Ugh.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 23:21:15 +0000
parents 2133d2d300fd
children a65f7b3a2524
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 void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
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44 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
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45
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46
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47 SDL_RenderDriver SDL_DUMMY_RenderDriver = {
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48 SDL_DUMMY_CreateRenderer,
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49 {
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50 "dummy",
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51 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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52 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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53 SDL_RENDERER_PRESENTDISCARD),
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54 }
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55 };
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56
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57 typedef struct
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58 {
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59 int current_screen;
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60 SDL_Surface *screens[3];
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61 } SDL_DUMMY_RenderData;
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62
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63 SDL_Renderer *
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64 SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
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65 {
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66 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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67 SDL_DisplayMode *displayMode = &display->current_mode;
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68 SDL_Renderer *renderer;
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69 SDL_DUMMY_RenderData *data;
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70 int i, n;
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71 int bpp;
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72 Uint32 Rmask, Gmask, Bmask, Amask;
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73
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74 if (!SDL_PixelFormatEnumToMasks
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75 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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76 SDL_SetError("Unknown display format");
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77 return NULL;
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78 }
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79
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80 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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81 if (!renderer) {
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82 SDL_OutOfMemory();
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83 return NULL;
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84 }
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85
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86 data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
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87 if (!data) {
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88 SDL_DUMMY_DestroyRenderer(renderer);
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89 SDL_OutOfMemory();
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90 return NULL;
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91 }
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92 SDL_zerop(data);
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93
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94 renderer->RenderPoint = SDL_DUMMY_RenderPoint;
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95 renderer->RenderLine = SDL_DUMMY_RenderLine;
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96 renderer->RenderFill = SDL_DUMMY_RenderFill;
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97 renderer->RenderCopy = SDL_DUMMY_RenderCopy;
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98 renderer->RenderPresent = SDL_DUMMY_RenderPresent;
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99 renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
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100 renderer->info.name = SDL_DUMMY_RenderDriver.info.name;
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101 renderer->info.flags = 0;
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102 renderer->window = window->id;
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103 renderer->driverdata = data;
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104 Setup_SoftwareRenderer(renderer);
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105
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106 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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107 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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108 n = 2;
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109 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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110 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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111 n = 3;
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112 } else {
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113 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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114 n = 1;
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115 }
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116 for (i = 0; i < n; ++i) {
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117 data->screens[i] =
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118 SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
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119 Bmask, Amask);
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120 if (!data->screens[i]) {
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121 SDL_DUMMY_DestroyRenderer(renderer);
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122 return NULL;
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123 }
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124 SDL_SetSurfacePalette(data->screens[i], display->palette);
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125 }
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126 data->current_screen = 0;
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127
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128 return renderer;
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129 }
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130
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diff changeset
131 static int
2901
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diff changeset
132 SDL_DUMMY_RenderPoint(SDL_Renderer * renderer, int x, int y)
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diff changeset
133 {
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diff changeset
134 SDL_DUMMY_RenderData *data =
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diff changeset
135 (SDL_DUMMY_RenderData *) renderer->driverdata;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
136 SDL_Surface *target = data->screens[data->current_screen];
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
137 int status;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
138
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
139 if (renderer->blendMode == SDL_BLENDMODE_NONE ||
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
140 renderer->blendMode == SDL_BLENDMODE_MASK) {
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
141 Uint32 color =
133601e3b255 Added RenderPiont() API
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diff changeset
142 SDL_MapRGBA(target->format, renderer->r, renderer->g, renderer->b,
133601e3b255 Added RenderPiont() API
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diff changeset
143 renderer->a);
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diff changeset
144
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
145 status = SDL_DrawPoint(target, x, y, color);
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
146 } else {
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
147 status =
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
148 SDL_BlendPoint(target, x, y, renderer->blendMode, renderer->r,
133601e3b255 Added RenderPiont() API
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diff changeset
149 renderer->g, renderer->b, renderer->a);
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diff changeset
150 }
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
151 return status;
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
152 }
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
153
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
154 static int
2888
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diff changeset
155 SDL_DUMMY_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
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diff changeset
156 {
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diff changeset
157 SDL_DUMMY_RenderData *data =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
158 (SDL_DUMMY_RenderData *) renderer->driverdata;
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
159 SDL_Surface *target = data->screens[data->current_screen];
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diff changeset
160 int status;
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diff changeset
161
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diff changeset
162 if (renderer->blendMode == SDL_BLENDMODE_NONE ||
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diff changeset
163 renderer->blendMode == SDL_BLENDMODE_MASK) {
2888
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diff changeset
164 Uint32 color =
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diff changeset
165 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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diff changeset
166 renderer->a);
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diff changeset
167
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
168 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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diff changeset
169 } else {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
170 status =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
171 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
172 renderer->r, renderer->g, renderer->b, renderer->a);
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diff changeset
173 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
174 return status;
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diff changeset
175 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
176
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
177 static int
2884
9dde605c7540 Date: Fri, 19 Dec 2008 20:17:35 +0100
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parents: 2859
diff changeset
178 SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
1908
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diff changeset
179 {
1912
8d384b647307 Setting up the OpenGL support
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diff changeset
180 SDL_DUMMY_RenderData *data =
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181 (SDL_DUMMY_RenderData *) renderer->driverdata;
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diff changeset
182 SDL_Surface *target = data->screens[data->current_screen];
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diff changeset
183 SDL_Rect real_rect = *rect;
2888
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diff changeset
184 int 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 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
187 Uint32 color =
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diff changeset
188 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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diff changeset
189 renderer->a);
1908
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diff changeset
190
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
191 status = SDL_FillRect(target, &real_rect, color);
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diff changeset
192 } else {
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
193 status =
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
194 SDL_BlendRect(target, &real_rect, renderer->blendMode,
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diff changeset
195 renderer->r, renderer->g, renderer->b, renderer->a);
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diff changeset
196 }
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
197 return status;
1908
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diff changeset
198 }
e079dafea2bf Implemented fully featured dummy renderer
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diff changeset
199
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diff changeset
200 static int
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diff changeset
201 SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
1985
8055185ae4ed Added source color and alpha modulation support.
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parents: 1965
diff changeset
202 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
1908
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diff changeset
203 {
1912
8d384b647307 Setting up the OpenGL support
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diff changeset
204 SDL_DUMMY_RenderData *data =
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diff changeset
205 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
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diff changeset
206 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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diff changeset
207 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
e079dafea2bf Implemented fully featured dummy renderer
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diff changeset
208
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
209 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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diff changeset
210 SDL_Surface *target = data->screens[data->current_screen];
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
211 void *pixels =
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
212 (Uint8 *) target->pixels + dstrect->y * target->pitch +
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
213 dstrect->x * target->format->BytesPerPixel;
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
214 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
215 srcrect, display->current_mode.format,
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
216 dstrect->w, dstrect->h, pixels,
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
217 target->pitch);
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
218 } else {
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
219 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
220 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
221 SDL_Rect real_srcrect = *srcrect;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
222 SDL_Rect real_dstrect = *dstrect;
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
223
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
224 return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
225 }
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
226 }
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
227
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
228 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
229 SDL_DUMMY_RenderPresent(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
230 {
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
231 static int frame_number;
1912
8d384b647307 Setting up the OpenGL support
Sam Lantinga <slouken@libsdl.org>
parents: 1908
diff changeset
232 SDL_DUMMY_RenderData *data =
8d384b647307 Setting up the OpenGL support
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parents: 1908
diff changeset
233 (SDL_DUMMY_RenderData *) renderer->driverdata;
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
234
1908
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
235 /* Send the data to the display */
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
236 if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
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
237 char file[128];
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
238 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 renderer->window, ++frame_number);
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
240 SDL_SaveBMP(data->screens[data->current_screen], file);
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
241 }
e079dafea2bf Implemented fully featured dummy renderer
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parents: 1907
diff changeset
242
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
243 /* Update the flipping chain, if any */
1965
a788656ca29a SDL constants are all uppercase.
Sam Lantinga <slouken@libsdl.org>
parents: 1912
diff changeset
244 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
245 data->current_screen = (data->current_screen + 1) % 2;
1965
a788656ca29a SDL constants are all uppercase.
Sam Lantinga <slouken@libsdl.org>
parents: 1912
diff changeset
246 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
247 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248 }
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
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
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
251 static void
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
252 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
253 {
1912
8d384b647307 Setting up the OpenGL support
Sam Lantinga <slouken@libsdl.org>
parents: 1908
diff changeset
254 SDL_DUMMY_RenderData *data =
8d384b647307 Setting up the OpenGL support
Sam Lantinga <slouken@libsdl.org>
parents: 1908
diff changeset
255 (SDL_DUMMY_RenderData *) renderer->driverdata;
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
256 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
257
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
258 if (data) {
1908
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
259 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
260 if (data->screens[i]) {
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
261 SDL_FreeSurface(data->screens[i]);
e079dafea2bf Implemented fully featured dummy renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1907
diff changeset
262 }
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
263 }
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
264 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
265 }
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
266 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
267 }
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
268
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
269 /* vi: set ts=4 sw=4 expandtab: */