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annotate src/video/nds/SDL_ndsrender.c @ 2672:74ac057679d5 gsoc2008_nds

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NDS video driver is now functional, using software rendering and framebuffer.
author Darren Alton <dalton@stevens.edu>
date Tue, 17 Jun 2008 08:26:36 +0000
parents c3e7c0698cbb
children 24a6b3588eac
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
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23 #include <stdio.h>
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24 #include <stdlib.h>
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25 #include <nds.h>
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26
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27 #include "SDL_config.h"
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28
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29 #include "SDL_video.h"
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30 #include "../SDL_sysvideo.h"
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31 #include "../SDL_yuv_sw_c.h"
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32 #include "../SDL_renderer_sw.h"
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33
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34
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35 /* SDL surface based renderer implementation */
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36
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37 static SDL_Renderer *SDL_NDS_CreateRenderer(SDL_Window * window,
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38 Uint32 flags);
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39 static int SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
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40 Uint8 b, Uint8 a, const SDL_Rect * rect);
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41 static int SDL_NDS_RenderCopy(SDL_Renderer * renderer,
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42 SDL_Texture * texture,
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43 const SDL_Rect * srcrect,
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44 const SDL_Rect * dstrect);
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45 static void SDL_NDS_RenderPresent(SDL_Renderer * renderer);
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46 static void SDL_NDS_DestroyRenderer(SDL_Renderer * renderer);
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47
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48
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49 SDL_RenderDriver SDL_NDS_RenderDriver = {
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50 SDL_NDS_CreateRenderer,
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51 {"nds", SDL_RENDERER_PRESENTCOPY}
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52 /* (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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53 SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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54 SDL_RENDERER_PRESENTDISCARD),*/
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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 int ultimate_answer;
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62 } SDL_NDS_RenderData;
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63
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64
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65
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66 /* this is mainly hackish testing/debugging stuff to get cleaned up soon
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67 anything named sdlds_blah shouldn't make it into the stable version
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68 */
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69
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70 u16
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71 sdlds_rgb2bgr(u16 c) {
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72 /* hack to get the colors right until I actually add BGR555 to the headers */
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73 u16 Rmask = 0x7C00, Bmask = 0x001F, GAmask = 0x83E0, r, b;
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74 r = (c & Rmask) >> 10;
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75 b = (c & Bmask) << 10;
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76 return (c & GAmask) | r | b;
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77 }
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78
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79 void
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80 sdlds_surf2vram(SDL_Surface * s)
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81 {
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82
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83 int i;
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84 /*for (i = 0; i < 30; ++i) swiWaitForVBlank();*/
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85 for (i = 0; i < 256 * 192; ++i) {
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86 ((u16 *) VRAM_A)[i] = sdlds_rgb2bgr(((u16 *) (s->pixels))[i+160]);
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87 }
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88 }
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89
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90 void
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91 sdlds_print_pixfmt_info(SDL_PixelFormat *f) {
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92 if(!f) return;
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93 printf("bpp: %d\nRGBA: %x %x %x %x\n",
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94 f->BitsPerPixel, f->Rmask, f->Gmask, f->Bmask, f->Amask);
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95 }
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96
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97 void
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98 sdlds_print_surface_info(SDL_Surface *s) {
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99 if(!s) return;
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100 printf("flags: %x\nsize: %dx%d, pitch: %d\nlocked: %d, refcount: %d\n",
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101 s->flags, s->w, s->h, s->pitch, s->locked, s->refcount);
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102 sdlds_print_pixfmt_info(s->format);
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103 }
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104
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105
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106
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107 SDL_Renderer *
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108 SDL_NDS_CreateRenderer(SDL_Window * window, Uint32 flags)
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109 {
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110 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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111 SDL_DisplayMode *displayMode = &display->current_mode;
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112 SDL_Renderer *renderer;
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113 SDL_NDS_RenderData *data;
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114 int i, n;
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115 int bpp = 15;
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116 /*/
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117 Uint32 Rmask = 0x7C00, Gmask = 0x03E0, Bmask = 0x001F, Amask = 0x8000;
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118 /*/
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119 Uint32 Rmask = 0x001F, Gmask = 0x03E0, Bmask = 0x7C00, Amask = 0x8000;
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120 //*/
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121
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122 #if 0
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123 printf("SDL_NDS_CreateRenderer(window, 0x%x)\n", flags);
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124 printf(" window: (%d,%d), %dx%d\n",
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125 window->x, window->y, window->w, window->h);
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126 #endif
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127
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128 /* hard coded this to ARGB1555 for now
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129 if (!SDL_PixelFormatEnumToMasks
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130 (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
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131 SDL_SetError("Unknown display format");
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132 return NULL;
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133 } */
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134
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135 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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136 if (!renderer) {
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137 SDL_OutOfMemory();
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138 return NULL;
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139 }
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140
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141 data = (SDL_NDS_RenderData *) SDL_malloc(sizeof(*data));
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142 if (!data) {
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143 SDL_NDS_DestroyRenderer(renderer);
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144 SDL_OutOfMemory();
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145 return NULL;
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146 }
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147 SDL_zerop(data);
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148
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149 renderer->RenderFill = SDL_NDS_RenderFill;
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150 renderer->RenderCopy = SDL_NDS_RenderCopy;
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151 renderer->RenderPresent = SDL_NDS_RenderPresent;
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152 renderer->DestroyRenderer = SDL_NDS_DestroyRenderer;
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153 renderer->info.name = SDL_NDS_RenderDriver.info.name;
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154 renderer->info.flags = 0;
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155 renderer->window = window->id;
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156 renderer->driverdata = data;
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157 Setup_SoftwareRenderer(renderer);
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158
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159 if (flags & SDL_RENDERER_PRESENTFLIP2) {
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160 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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161 n = 2;
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162 } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
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163 renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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164 n = 3;
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165 } else {
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166 renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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167 n = 1;
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168 }
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169 for (i = 0; i < n; ++i) {
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170 data->screens[i] =
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171 SDL_CreateRGBSurface(0, 256, 192, bpp, Rmask, Gmask, Bmask, Amask);
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172 if (!data->screens[i]) {
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173 SDL_NDS_DestroyRenderer(renderer);
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174 return NULL;
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175 }
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176 SDL_SetSurfacePalette(data->screens[i], display->palette);
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177 }
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178
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179 data->current_screen = 0;
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180 data->ultimate_answer = 42;
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181
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182 return renderer;
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183 }
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184
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185 static int
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186 SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
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187 Uint8 a, const SDL_Rect * rect)
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188 {
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189 SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
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190 SDL_Surface *target = data->screens[data->current_screen];
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191 Uint32 color;
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192 SDL_Rect real_rect = *rect;
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193
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194 color = SDL_MapRGBA(target->format, r, g, b, a);
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195
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196 return SDL_FillRect(target, &real_rect, color);
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197 }
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198
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199 static int
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200 SDL_NDS_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
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201 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
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202 {
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203 SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
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204 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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205 SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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206 #if 0
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207 printf("SDL_NDS_RenderCopy(renderer, texture, srcrect, dstrect)\n");
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208 printf(" renderer: %s\n", renderer->info.name);
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209 printf(" texture: %dx%d\n", texture->w, texture->h);
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210 printf(" srcrect: (%d,%d), %dx%d\n", srcrect->x, srcrect->y, srcrect->w,
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211 srcrect->h);
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212 printf(" dstrect: (%d,%d), %dx%d\n", dstrect->x, dstrect->y, dstrect->w,
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213 dstrect->h);
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214 #endif
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215 if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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216 SDL_Surface *target = data->screens[data->current_screen];
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217 void *pixels =
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218 (Uint8 *) target->pixels + dstrect->y * target->pitch +
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219 dstrect->x * target->format->BytesPerPixel;
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220 return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
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221 srcrect, display->current_mode.format,
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222 dstrect->w, dstrect->h, pixels,
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223 target->pitch);
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224 } else {
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225 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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226 SDL_Surface *target = data->screens[data->current_screen];
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227 SDL_Rect real_srcrect = *srcrect;
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228 SDL_Rect real_dstrect = *dstrect;
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229 /*sdlds_print_surface_info(surface);
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230 sdlds_print_surface_info(target);*/
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231 sdlds_surf2vram(surface);
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232 return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
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233 }
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234 #if 0
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235 /* copy it directly to vram */
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236 SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
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237 int sx = srcrect->x, sy = srcrect->y, sw = srcrect->w, sh = srcrect->h;
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238 int dx = dstrect->x, dy = dstrect->y, dw = dstrect->w, dh = dstrect->h;
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239 int si, sj, di, dj;
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240 for (sj = 0, dj = 0; sj < sh && dj < dh; ++sj, ++dj) {
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241 for (si = 0, di = 0; si < sw && di < dw; ++si, ++di) {
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242 VRAM_A[(dj + dy) * 256 + di + dx] =
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243 ((Uint16 *) surface->pixels)[(sj + sy) * (surface->w) + si + sx];
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244 }
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245 }
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246 return 0;
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247 #endif
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248 }
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249
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250
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251 static void
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252 SDL_NDS_RenderPresent(SDL_Renderer * renderer)
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253 {
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254 SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
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255 #if 0
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256 printf("SDL_NDS_RenderPresent(renderer)\n");
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257 printf(" renderer: %s\n", renderer->info.name);
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258 #endif
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259 /* Send the data to the display */
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260 /*sdlds_surf2vram(data->screens[data->current_screen]);*/
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261
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262 /* Update the flipping chain, if any */
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263 if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
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264 data->current_screen = (data->current_screen + 1) % 2;
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265 } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
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266 data->current_screen = (data->current_screen + 1) % 3;
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267 }
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268 }
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269
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270 static void
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271 SDL_NDS_DestroyRenderer(SDL_Renderer * renderer)
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272 {
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273 SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
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274 int i;
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275
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276 printf("SDL_NDS_DestroyRenderer(renderer)\n");
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277 printf(" renderer: %s\n", renderer->info.name);
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278 if (data) {
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279 for (i = 0; i < SDL_arraysize(data->screens); ++i) {
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280 if (data->screens[i]) {
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281 SDL_FreeSurface(data->screens[i]);
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282 }
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283 }
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284 SDL_free(data);
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285 }
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286 SDL_free(renderer);
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287 }
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288
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289 /* vi: set ts=4 sw=4 expandtab: */