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annotate test/testbitmap.c @ 5266:595814f561f7

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There is only one width and height for the window. If those are changed during the course of a fullscreen mode change, then they'll stay that size when returning to windowed mode.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Feb 2011 20:49:13 -0800
parents c0ce3380742d
children
rev   line source
0
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1
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2 /* Simple program: Test bitmap blits */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <string.h>
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7
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8 #include "SDL.h"
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9 #include "picture.xbm"
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10
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11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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12 static void
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13 quit(int rc)
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14 {
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15 SDL_Quit();
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16 exit(rc);
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17 }
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18
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19 SDL_Surface *
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20 LoadXBM(SDL_Surface * screen, int w, int h, Uint8 * bits)
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21 {
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22 SDL_Surface *bitmap;
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23 Uint8 *line;
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24
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25 /* Allocate the bitmap */
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26 bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0);
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27 if (bitmap == NULL) {
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28 fprintf(stderr, "Couldn't allocate bitmap: %s\n", SDL_GetError());
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29 return (NULL);
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30 }
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31
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32 /* Copy the pixels */
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33 line = (Uint8 *) bitmap->pixels;
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34 w = (w + 7) / 8;
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35 while (h--) {
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36 memcpy(line, bits, w);
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37 /* X11 Bitmap images have the bits reversed */
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38 {
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39 int i, j;
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40 Uint8 *buf, byte;
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41 for (buf = line, i = 0; i < w; ++i, ++buf) {
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42 byte = *buf;
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43 *buf = 0;
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44 for (j = 7; j >= 0; --j) {
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45 *buf |= (byte & 0x01) << j;
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46 byte >>= 1;
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47 }
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48 }
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49 }
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50 line += bitmap->pitch;
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51 bits += w;
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52 }
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53 return (bitmap);
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54 }
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55
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56 int
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57 main(int argc, char *argv[])
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58 {
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59 SDL_Surface *screen;
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60 SDL_Surface *bitmap;
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61 Uint8 video_bpp;
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62 Uint32 videoflags;
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63 Uint8 *buffer;
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64 int i, k, done;
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65 SDL_Event event;
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66 Uint16 *buffer16;
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67 Uint16 color;
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68 Uint8 gradient;
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69 SDL_Color palette[256];
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70
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71 int video_w, video_h;
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72
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73 /* Initialize SDL */
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74 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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75 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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76 return (1);
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77 }
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78
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79 video_bpp = 0;
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80 videoflags = SDL_SWSURFACE;
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81 while (argc > 1) {
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82 --argc;
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83 if (strcmp(argv[argc - 1], "-bpp") == 0) {
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84 video_bpp = atoi(argv[argc]);
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85 --argc;
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86 } else if (strcmp(argv[argc], "-warp") == 0) {
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87 videoflags |= SDL_HWPALETTE;
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88 } else if (strcmp(argv[argc], "-hw") == 0) {
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89 videoflags |= SDL_HWSURFACE;
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90 } else if (strcmp(argv[argc], "-fullscreen") == 0) {
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91 videoflags |= SDL_FULLSCREEN;
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92 } else {
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93 fprintf(stderr,
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94 "Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n",
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95 argv[0]);
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96 quit(1);
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97 }
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98 }
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99
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100 #ifdef __IPHONEOS__
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101 video_w = 320;
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102 video_h = 480;
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103 #else
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104 video_w = 640;
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105 video_h = 480;
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106 #endif
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107
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108 /* Set 640x480 video mode */
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109 if ((screen =
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110 SDL_SetVideoMode(video_w, video_h, video_bpp, videoflags)) == NULL) {
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111 fprintf(stderr, "Couldn't set %dx%d %d video mode: %s\n", video_w,
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112 video_h, video_bpp, SDL_GetError());
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113 quit(2);
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114 }
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115
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116 if (video_bpp == 8) {
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117 /* Set a gray colormap, reverse order from white to black */
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118 for (i = 0; i < 256; ++i) {
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119 palette[i].r = 255 - i;
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120 palette[i].g = 255 - i;
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121 palette[i].b = 255 - i;
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122 }
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123 SDL_SetColors(screen, palette, 0, 256);
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124 }
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125
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126 /* Set the surface pixels and refresh! */
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127 if (SDL_LockSurface(screen) < 0) {
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128 fprintf(stderr, "Couldn't lock the display surface: %s\n",
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129 SDL_GetError());
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130 quit(2);
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131 }
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132 buffer = (Uint8 *) screen->pixels;
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133 if (screen->format->BytesPerPixel != 2) {
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134 for (i = 0; i < screen->h; ++i) {
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135 memset(buffer, (i * 255) / screen->h, screen->pitch);
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136 buffer += screen->pitch;
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137 }
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138 } else {
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139 for (i = 0; i < screen->h; ++i) {
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140 gradient = ((i * 255) / screen->h);
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141 color = SDL_MapRGB(screen->format, gradient, gradient, gradient);
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142 buffer16 = (Uint16 *) buffer;
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143 for (k = 0; k < screen->w; k++) {
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144 *(buffer16 + k) = color;
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145 }
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146 buffer += screen->pitch;
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609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
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147 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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148 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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149 SDL_UnlockSurface(screen);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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150 SDL_UpdateRect(screen, 0, 0, 0, 0);
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151
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152 /* Load the bitmap */
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153 bitmap = LoadXBM(screen, picture_width, picture_height,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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154 (Uint8 *) picture_bits);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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155 if (bitmap == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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156 quit(1);
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157 }
0
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158
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159 /* Wait for a keystroke */
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160 done = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
161 while (!done) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
162 /* Check for events */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
163 while (SDL_PollEvent(&event)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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164 switch (event.type) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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165 case SDL_MOUSEBUTTONDOWN:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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166 {
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diff changeset
167 SDL_Rect dst;
0
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168
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169 dst.x = event.button.x - bitmap->w / 2;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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170 dst.y = event.button.y - bitmap->h / 2;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
171 dst.w = bitmap->w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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172 dst.h = bitmap->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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173 SDL_BlitSurface(bitmap, NULL, screen, &dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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174 SDL_UpdateRects(screen, 1, &dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
175 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
176 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
177 case SDL_KEYDOWN:
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178 /* Any key press quits the app... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
179 done = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
180 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
181 case SDL_QUIT:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
182 done = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1151
diff changeset
183 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
184 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
185 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
186 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
187 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
188 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
189 SDL_FreeSurface(bitmap);
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diff changeset
190 SDL_Quit();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
191 return (0);
0
74212992fb08 Initial revision
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diff changeset
192 }