annotate test/testalpha.c @ 4211:3ce5bfddbaf6 SDL-1.2

Fixed bug #572 Please merge this patch for the PA driver in SDL. http://0pointer.de/public/sdl-pulse-rework.patch This patch: - fixes buffering (i.e. reduces number of "fragments" to 2, doesn't defer filling up of the buffer until the entire buffer ran completely empty.) - drops $PASERVER and $PADEVICE env var support, since this is a duplication of $PULSE_SERVER and $PULSE_SINK which the PA libs honor anyway. This fixes the sound issues in all games I tested.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 08:03:00 +0000
parents b2f59aadec0d
children
rev   line source
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1
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2 /* Simple program: Fill a colormap with gray and stripe it down the screen,
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3 Then move an alpha valued sprite around the screen.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <string.h>
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9 #include <math.h>
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10
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11 #include "SDL.h"
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12
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13 #define FRAME_TICKS (1000/30) /* 30 frames/second */
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14
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15 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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16 static void quit(int rc)
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17 {
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18 SDL_Quit();
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19 exit(rc);
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20 }
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21
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22 /* Fill the screen with a gradient */
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23 static void FillBackground(SDL_Surface *screen)
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24 {
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25 Uint8 *buffer;
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26 Uint16 *buffer16;
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27 Uint16 color;
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28 Uint8 gradient;
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29 int i, k;
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30
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31 /* Set the surface pixels and refresh! */
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32 if ( SDL_LockSurface(screen) < 0 ) {
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33 fprintf(stderr, "Couldn't lock the display surface: %s\n",
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34 SDL_GetError());
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35 quit(2);
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36 }
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37 buffer=(Uint8 *)screen->pixels;
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38 if (screen->format->BytesPerPixel!=2) {
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39 for ( i=0; i<screen->h; ++i ) {
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40 memset(buffer,(i*255)/screen->h, screen->w*screen->format->BytesPerPixel);
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41 buffer += screen->pitch;
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42 }
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43 }
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44 else
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45 {
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46 for ( i=0; i<screen->h; ++i ) {
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47 gradient=((i*255)/screen->h);
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48 color = (Uint16)SDL_MapRGB(screen->format, gradient, gradient, gradient);
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49 buffer16=(Uint16*)buffer;
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50 for (k=0; k<screen->w; k++)
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51 {
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52 *(buffer16+k)=color;
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53 }
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54 buffer += screen->pitch;
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55 }
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56 }
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57
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58 SDL_UnlockSurface(screen);
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59 SDL_UpdateRect(screen, 0, 0, 0, 0);
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60 }
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61
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62 /* Create a "light" -- a yellowish surface with variable alpha */
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63 SDL_Surface *CreateLight(int radius)
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64 {
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65 Uint8 trans, alphamask;
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66 int range, addition;
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67 int xdist, ydist;
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68 Uint16 x, y;
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69 Uint16 skip;
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70 Uint32 pixel;
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71 SDL_Surface *light;
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72
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73 #ifdef LIGHT_16BIT
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74 Uint16 *buf;
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75
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76 /* Create a 16 (4/4/4/4) bpp square with a full 4-bit alpha channel */
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77 /* Note: this isn't any faster than a 32 bit alpha surface */
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78 alphamask = 0x0000000F;
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79 light = SDL_CreateRGBSurface(SDL_SWSURFACE, 2*radius, 2*radius, 16,
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80 0x0000F000, 0x00000F00, 0x000000F0, alphamask);
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81 #else
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82 Uint32 *buf;
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83
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84 /* Create a 32 (8/8/8/8) bpp square with a full 8-bit alpha channel */
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85 alphamask = 0x000000FF;
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86 light = SDL_CreateRGBSurface(SDL_SWSURFACE, 2*radius, 2*radius, 32,
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87 0xFF000000, 0x00FF0000, 0x0000FF00, alphamask);
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88 if ( light == NULL ) {
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89 fprintf(stderr, "Couldn't create light: %s\n", SDL_GetError());
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90 return(NULL);
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91 }
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92 #endif
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93
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94 /* Fill with a light yellow-orange color */
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95 skip = light->pitch-(light->w*light->format->BytesPerPixel);
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96 #ifdef LIGHT_16BIT
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97 buf = (Uint16 *)light->pixels;
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98 #else
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99 buf = (Uint32 *)light->pixels;
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100 #endif
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101 /* Get a tranparent pixel value - we'll add alpha later */
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102 pixel = SDL_MapRGBA(light->format, 0xFF, 0xDD, 0x88, 0);
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103 for ( y=0; y<light->h; ++y ) {
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104 for ( x=0; x<light->w; ++x ) {
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105 *buf++ = pixel;
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106 }
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107 buf += skip; /* Almost always 0, but just in case... */
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108 }
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109
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110 /* Calculate alpha values for the surface. */
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111 #ifdef LIGHT_16BIT
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112 buf = (Uint16 *)light->pixels;
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113 #else
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114 buf = (Uint32 *)light->pixels;
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115 #endif
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116 for ( y=0; y<light->h; ++y ) {
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117 for ( x=0; x<light->w; ++x ) {
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118 /* Slow distance formula (from center of light) */
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119 xdist = x-(light->w/2);
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120 ydist = y-(light->h/2);
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121 range = (int)sqrt(xdist*xdist+ydist*ydist);
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122
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123 /* Scale distance to range of transparency (0-255) */
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124 if ( range > radius ) {
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125 trans = alphamask;
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126 } else {
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127 /* Increasing transparency with distance */
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128 trans = (Uint8)((range*alphamask)/radius);
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129
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130 /* Lights are very transparent */
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131 addition = (alphamask+1)/8;
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132 if ( (int)trans+addition > alphamask ) {
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133 trans = alphamask;
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134 } else {
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135 trans += addition;
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136 }
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137 }
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138 /* We set the alpha component as the right N bits */
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139 *buf++ |= (255-trans);
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140 }
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141 buf += skip; /* Almost always 0, but just in case... */
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142 }
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143 /* Enable RLE acceleration of this alpha surface */
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144 SDL_SetAlpha(light, SDL_SRCALPHA|SDL_RLEACCEL, 0);
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145
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146 /* We're done! */
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147 return(light);
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148 }
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149
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150 static Uint32 flashes = 0;
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151 static Uint32 flashtime = 0;
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152
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153 void FlashLight(SDL_Surface *screen, SDL_Surface *light, int x, int y)
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154 {
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155 SDL_Rect position;
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156 Uint32 ticks1;
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157 Uint32 ticks2;
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158
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159 /* Easy, center light */
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160 position.x = x-(light->w/2);
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161 position.y = y-(light->h/2);
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162 position.w = light->w;
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163 position.h = light->h;
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164 ticks1 = SDL_GetTicks();
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165 SDL_BlitSurface(light, NULL, screen, &position);
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166 ticks2 = SDL_GetTicks();
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167 SDL_UpdateRects(screen, 1, &position);
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168 ++flashes;
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169
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170 /* Update time spend doing alpha blitting */
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171 flashtime += (ticks2-ticks1);
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172 }
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173
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174 static int sprite_visible = 0;
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175 static SDL_Surface *sprite;
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176 static SDL_Surface *backing;
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177 static SDL_Rect position;
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178 static int x_vel, y_vel;
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179 static int alpha_vel;
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180
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181 int LoadSprite(SDL_Surface *screen, char *file)
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182 {
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183 SDL_Surface *converted;
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184
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185 /* Load the sprite image */
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186 sprite = SDL_LoadBMP(file);
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187 if ( sprite == NULL ) {
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188 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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189 return(-1);
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190 }
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191
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192 /* Set transparent pixel as the pixel at (0,0) */
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193 if ( sprite->format->palette ) {
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194 SDL_SetColorKey(sprite, SDL_SRCCOLORKEY,
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195 *(Uint8 *)sprite->pixels);
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196 }
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197
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198 /* Convert sprite to video format */
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199 converted = SDL_DisplayFormat(sprite);
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200 SDL_FreeSurface(sprite);
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201 if ( converted == NULL ) {
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202 fprintf(stderr, "Couldn't convert background: %s\n",
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203 SDL_GetError());
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204 return(-1);
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205 }
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206 sprite = converted;
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207
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208 /* Create the background */
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209 backing = SDL_CreateRGBSurface(SDL_SWSURFACE, sprite->w, sprite->h, 8,
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210 0, 0, 0, 0);
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211 if ( backing == NULL ) {
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212 fprintf(stderr, "Couldn't create background: %s\n",
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213 SDL_GetError());
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214 SDL_FreeSurface(sprite);
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215 return(-1);
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216 }
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217
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218 /* Convert background to video format */
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219 converted = SDL_DisplayFormat(backing);
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220 SDL_FreeSurface(backing);
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221 if ( converted == NULL ) {
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222 fprintf(stderr, "Couldn't convert background: %s\n",
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223 SDL_GetError());
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224 SDL_FreeSurface(sprite);
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225 return(-1);
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226 }
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227 backing = converted;
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228
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229 /* Set the initial position of the sprite */
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230 position.x = (screen->w-sprite->w)/2;
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231 position.y = (screen->h-sprite->h)/2;
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232 position.w = sprite->w;
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233 position.h = sprite->h;
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234 x_vel = 0; y_vel = 0;
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235 alpha_vel = 1;
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236
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parents:
diff changeset
237 /* We're ready to roll. :) */
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238 return(0);
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parents:
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239 }
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240
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241 void AttractSprite(Uint16 x, Uint16 y)
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242 {
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243 x_vel = ((int)x-position.x)/10;
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244 y_vel = ((int)y-position.y)/10;
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245 }
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246
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247 void MoveSprite(SDL_Surface *screen, SDL_Surface *light)
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248 {
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249 SDL_Rect updates[2];
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250 int alpha;
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251
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252 /* Erase the sprite if it was visible */
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diff changeset
253 if ( sprite_visible ) {
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254 updates[0] = position;
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255 SDL_BlitSurface(backing, NULL, screen, &updates[0]);
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diff changeset
256 } else {
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257 updates[0].x = 0; updates[0].y = 0;
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258 updates[0].w = 0; updates[0].h = 0;
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259 sprite_visible = 1;
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diff changeset
260 }
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261
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parents:
diff changeset
262 /* Since the sprite is off the screen, we can do other drawing
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diff changeset
263 without being overwritten by the saved area behind the sprite.
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diff changeset
264 */
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parents:
diff changeset
265 if ( light != NULL ) {
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266 int x, y;
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diff changeset
267
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268 SDL_GetMouseState(&x, &y);
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diff changeset
269 FlashLight(screen, light, x, y);
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diff changeset
270 }
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diff changeset
271
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parents:
diff changeset
272 /* Move the sprite, bounce at the wall */
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diff changeset
273 position.x += x_vel;
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diff changeset
274 if ( (position.x < 0) || (position.x >= screen->w) ) {
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275 x_vel = -x_vel;
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diff changeset
276 position.x += x_vel;
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diff changeset
277 }
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diff changeset
278 position.y += y_vel;
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diff changeset
279 if ( (position.y < 0) || (position.y >= screen->h) ) {
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diff changeset
280 y_vel = -y_vel;
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diff changeset
281 position.y += y_vel;
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parents:
diff changeset
282 }
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diff changeset
283
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parents:
diff changeset
284 /* Update transparency (fade in and out) */
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parents:
diff changeset
285 alpha = sprite->format->alpha;
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parents:
diff changeset
286 if ( (alpha+alpha_vel) < 0 ) {
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parents:
diff changeset
287 alpha_vel = -alpha_vel;
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parents:
diff changeset
288 } else
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parents:
diff changeset
289 if ( (alpha+alpha_vel) > 255 ) {
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parents:
diff changeset
290 alpha_vel = -alpha_vel;
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parents:
diff changeset
291 }
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diff changeset
292 SDL_SetAlpha(sprite, SDL_SRCALPHA, (Uint8)(alpha+alpha_vel));
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diff changeset
293
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diff changeset
294 /* Save the area behind the sprite */
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diff changeset
295 updates[1] = position;
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diff changeset
296 SDL_BlitSurface(screen, &updates[1], backing, NULL);
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diff changeset
297
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parents:
diff changeset
298 /* Blit the sprite onto the screen */
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diff changeset
299 updates[1] = position;
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diff changeset
300 SDL_BlitSurface(sprite, NULL, screen, &updates[1]);
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parents:
diff changeset
301
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parents:
diff changeset
302 /* Make it so! */
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parents:
diff changeset
303 SDL_UpdateRects(screen, 2, updates);
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diff changeset
304 }
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parents:
diff changeset
305
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diff changeset
306 void WarpSprite(SDL_Surface *screen, int x, int y)
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parents:
diff changeset
307 {
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diff changeset
308 SDL_Rect updates[2];
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diff changeset
309
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parents:
diff changeset
310 /* Erase, move, Draw, update */
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parents:
diff changeset
311 updates[0] = position;
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diff changeset
312 SDL_BlitSurface(backing, NULL, screen, &updates[0]);
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diff changeset
313 position.x = x-sprite->w/2; /* Center about X */
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parents:
diff changeset
314 position.y = y-sprite->h/2; /* Center about Y */
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parents:
diff changeset
315 updates[1] = position;
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parents:
diff changeset
316 SDL_BlitSurface(screen, &updates[1], backing, NULL);
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diff changeset
317 updates[1] = position;
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diff changeset
318 SDL_BlitSurface(sprite, NULL, screen, &updates[1]);
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diff changeset
319 SDL_UpdateRects(screen, 2, updates);
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parents:
diff changeset
320 }
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parents:
diff changeset
321
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parents:
diff changeset
322 int main(int argc, char *argv[])
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parents:
diff changeset
323 {
74212992fb08 Initial revision
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parents:
diff changeset
324 const SDL_VideoInfo *info;
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parents:
diff changeset
325 SDL_Surface *screen;
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
326 int w, h;
0
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diff changeset
327 Uint8 video_bpp;
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parents:
diff changeset
328 Uint32 videoflags;
1293
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329 int i, done;
0
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diff changeset
330 SDL_Event event;
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parents:
diff changeset
331 SDL_Surface *light;
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parents:
diff changeset
332 int mouse_pressed;
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parents:
diff changeset
333 Uint32 ticks, lastticks;
691
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
334
0
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parents:
diff changeset
335
74212992fb08 Initial revision
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parents:
diff changeset
336 /* Initialize SDL */
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parents:
diff changeset
337 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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parents:
diff changeset
338 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
339 return(1);
0
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parents:
diff changeset
340 }
74212992fb08 Initial revision
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parents:
diff changeset
341
74212992fb08 Initial revision
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parents:
diff changeset
342 /* Alpha blending doesn't work well at 8-bit color */
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
343 #ifdef _WIN32_WCE
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
344 /* Pocket PC */
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
345 w = 240;
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
346 h = 320;
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
347 #else
1293
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
348 w = 640;
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
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diff changeset
349 h = 480;
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
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diff changeset
350 #endif
0
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diff changeset
351 info = SDL_GetVideoInfo();
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parents:
diff changeset
352 if ( info->vfmt->BitsPerPixel > 8 ) {
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parents:
diff changeset
353 video_bpp = info->vfmt->BitsPerPixel;
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parents:
diff changeset
354 } else {
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diff changeset
355 video_bpp = 16;
691
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
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parents: 0
diff changeset
356 fprintf(stderr, "forced 16 bpp mode\n");
0
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diff changeset
357 }
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parents:
diff changeset
358 videoflags = SDL_SWSURFACE;
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
359 for ( i = 1; argv[i]; ++i ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
360 if ( strcmp(argv[i], "-bpp") == 0 ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
361 video_bpp = atoi(argv[++i]);
691
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
362 if (video_bpp<=8) {
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
363 video_bpp=16;
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
364 fprintf(stderr, "forced 16 bpp mode\n");
609543e2b3a1 Date: Fri, 15 Aug 2003 09:13:59 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
365 }
0
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parents:
diff changeset
366 } else
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
367 if ( strcmp(argv[i], "-hw") == 0 ) {
0
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parents:
diff changeset
368 videoflags |= SDL_HWSURFACE;
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parents:
diff changeset
369 } else
1293
23b1ef7d003b Added some useful command line arguments for testing
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parents: 1152
diff changeset
370 if ( strcmp(argv[i], "-warp") == 0 ) {
0
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parents:
diff changeset
371 videoflags |= SDL_HWPALETTE;
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parents:
diff changeset
372 } else
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
373 if ( strcmp(argv[i], "-width") == 0 && argv[i+1] ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
374 w = atoi(argv[++i]);
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
375 } else
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
376 if ( strcmp(argv[i], "-height") == 0 && argv[i+1] ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
377 h = atoi(argv[++i]);
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
378 } else
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
379 if ( strcmp(argv[i], "-resize") == 0 ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
380 videoflags |= SDL_RESIZABLE;
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
381 } else
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
382 if ( strcmp(argv[i], "-noframe") == 0 ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
383 videoflags |= SDL_NOFRAME;
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
384 } else
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
385 if ( strcmp(argv[i], "-fullscreen") == 0 ) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 videoflags |= SDL_FULLSCREEN;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388 fprintf(stderr,
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
389 "Usage: %s [-width N] [-height N] [-bpp N] [-warp] [-hw] [-fullscreen]\n",
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 argv[0]);
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
391 quit(1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
395 /* Set video mode */
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
396 if ( (screen=SDL_SetVideoMode(w,h,video_bpp,videoflags)) == NULL ) {
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
397 fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1293
diff changeset
398 w, h, video_bpp, SDL_GetError());
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
399 quit(2);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 }
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
401 FillBackground(screen);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 /* Create the light */
1516
4d241ea8a1cd Updated MacOS Classic build
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
404 light = CreateLight(82);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 if ( light == NULL ) {
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
406 quit(1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 /* Load the sprite */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 if ( LoadSprite(screen, "icon.bmp") < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 SDL_FreeSurface(light);
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
412 quit(1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414
886
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
415 /* Print out information about our surfaces */
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
416 printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel);
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
417 if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
418 printf("Screen is in video memory\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
419 } else {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
420 printf("Screen is in system memory\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
421 }
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
422 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
423 printf("Screen has double-buffering enabled\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
424 }
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
425 if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
426 printf("Sprite is in video memory\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
427 } else {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
428 printf("Sprite is in system memory\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
429 }
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
430
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
431 /* Run a sample blit to trigger blit acceleration */
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
432 MoveSprite(screen, NULL);
886
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
433 if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
434 printf("Sprite blit uses hardware alpha acceleration\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
435 } else {
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
436 printf("Sprite blit dosn't uses hardware alpha acceleration\n");
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
437 }
05c551e5bc64 Date: Sat, 24 Apr 2004 15:13:32 +0300
Sam Lantinga <slouken@libsdl.org>
parents: 691
diff changeset
438
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 /* Set a clipping rectangle to clip the outside edge of the screen */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 { SDL_Rect clip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 clip.x = 32;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 clip.y = 32;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 clip.w = screen->w-(2*32);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 clip.h = screen->h-(2*32);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 SDL_SetClipRect(screen, &clip);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 /* Wait for a keystroke */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 lastticks = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 done = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 mouse_pressed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 while ( !done ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 /* Update the frame -- move the sprite */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 if ( mouse_pressed ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 MoveSprite(screen, light);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 mouse_pressed = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 MoveSprite(screen, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 /* Slow down the loop to 30 frames/second */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 ticks = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 if ( (ticks-lastticks) < FRAME_TICKS ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 #ifdef CHECK_SLEEP_GRANULARITY
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 fprintf(stderr, "Sleeping %d ticks\n", FRAME_TICKS-(ticks-lastticks));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 SDL_Delay(FRAME_TICKS-(ticks-lastticks));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 #ifdef CHECK_SLEEP_GRANULARITY
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 fprintf(stderr, "Slept %d ticks\n", (SDL_GetTicks()-ticks));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 lastticks = ticks;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 /* Check for events */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
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475 while ( SDL_PollEvent(&event) ) {
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476 switch (event.type) {
1293
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
diff changeset
477 case SDL_VIDEORESIZE:
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
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478 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, video_bpp, videoflags);
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
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479 if ( screen ) {
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
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480 FillBackground(screen);
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
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481 }
23b1ef7d003b Added some useful command line arguments for testing
Sam Lantinga <slouken@libsdl.org>
parents: 1152
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482 break;
0
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483 /* Attract sprite while mouse is held down */
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484 case SDL_MOUSEMOTION:
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485 if (event.motion.state != 0) {
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486 AttractSprite(event.motion.x,
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487 event.motion.y);
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488 mouse_pressed = 1;
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489 }
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parents:
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490 break;
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491 case SDL_MOUSEBUTTONDOWN:
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492 if ( event.button.button == 1 ) {
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493 AttractSprite(event.button.x,
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Sam Lantinga <slouken@lokigames.com>
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494 event.button.y);
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495 mouse_pressed = 1;
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496 } else {
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497 SDL_Rect area;
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498
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499 area.x = event.button.x-16;
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500 area.y = event.button.y-16;
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501 area.w = 32;
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502 area.h = 32;
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Sam Lantinga <slouken@lokigames.com>
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503 SDL_FillRect(screen, &area, 0);
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504 SDL_UpdateRects(screen,1,&area);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507 case SDL_KEYDOWN:
3868
b2f59aadec0d Fixed bug #294
Sam Lantinga <slouken@libsdl.org>
parents: 1779
diff changeset
508 #ifndef _WIN32_WCE
1779
67fc81efcfc3 Made it easier to test some things on the framebuffer console
Sam Lantinga <slouken@libsdl.org>
parents: 1516
diff changeset
509 if ( event.key.keysym.sym == SDLK_ESCAPE ) {
67fc81efcfc3 Made it easier to test some things on the framebuffer console
Sam Lantinga <slouken@libsdl.org>
parents: 1516
diff changeset
510 done = 1;
67fc81efcfc3 Made it easier to test some things on the framebuffer console
Sam Lantinga <slouken@libsdl.org>
parents: 1516
diff changeset
511 }
3868
b2f59aadec0d Fixed bug #294
Sam Lantinga <slouken@libsdl.org>
parents: 1779
diff changeset
512 #else
b2f59aadec0d Fixed bug #294
Sam Lantinga <slouken@libsdl.org>
parents: 1779
diff changeset
513 // there is no ESC key at all
b2f59aadec0d Fixed bug #294
Sam Lantinga <slouken@libsdl.org>
parents: 1779
diff changeset
514 done = 1;
b2f59aadec0d Fixed bug #294
Sam Lantinga <slouken@libsdl.org>
parents: 1779
diff changeset
515 #endif
1779
67fc81efcfc3 Made it easier to test some things on the framebuffer console
Sam Lantinga <slouken@libsdl.org>
parents: 1516
diff changeset
516 break;
0
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parents:
diff changeset
517 case SDL_QUIT:
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parents:
diff changeset
518 done = 1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 default:
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 SDL_FreeSurface(light);
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parents:
diff changeset
526 SDL_FreeSurface(sprite);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 SDL_FreeSurface(backing);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528
74212992fb08 Initial revision
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parents:
diff changeset
529 /* Print out some timing information */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 if ( flashes > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 printf("%d alpha blits, ~%4.4f ms per blit\n",
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 flashes, (float)flashtime/flashes);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 }
1151
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
534
be9c9c8f6d53 Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents: 886
diff changeset
535 SDL_Quit();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 }