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annotate test/testbitmap.c @ 5172:ededa1ccf91c

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Switched the SDL 1.2 compatibility to use the window surface, so it's fast even when there's no hardware acceleration available. This means that the YUV overlay now uses software, but that's okay since fast YUV code should be using the textures now anyway.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 03 Feb 2011 21:13:55 -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 }
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148 }
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149 SDL_UnlockSurface(screen);
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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,
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154 (Uint8 *) picture_bits);
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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;
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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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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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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);
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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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177 case SDL_KEYDOWN:
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178 /* Any key press quits the app... */
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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:
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diff changeset
182 done = 1;
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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:
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diff changeset
185 break;
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186 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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 }
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diff changeset
189 SDL_FreeSurface(bitmap);
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190 SDL_Quit();
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diff changeset
191 return (0);
0
74212992fb08 Initial revision
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diff changeset
192 }