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annotate test/testspriteminimal.c @ 5275:7aba0406c273

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Frank Zago to sdl The following patch fixes some of the bitrot for the Nintendo DS port. The support is still basic at the moment, but it allows to run the "general" test under the current head of tree (parent: 5269:11bd1585efb5 tip). Most of the patch is mine, but I integrated a couple changes that John Magnotti posted on Feb 1st.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 12 Feb 2011 11:36:56 -0800
parents b3ccd1947786
children
rev   line source
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1 /* Simple program: Move N sprites around on the screen as fast as possible */
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2
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3 #include <stdlib.h>
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4 #include <stdio.h>
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5 #include <time.h>
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6
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7 #include "SDL.h"
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8
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9 #define WINDOW_WIDTH 640
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10 #define WINDOW_HEIGHT 480
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11 #define NUM_SPRITES 100
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12 #define MAX_SPEED 1
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13
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14 static SDL_Texture *sprite;
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15 static SDL_Rect positions[NUM_SPRITES];
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16 static SDL_Rect velocities[NUM_SPRITES];
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17 static int sprite_w, sprite_h;
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18
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19 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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20 static void
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21 quit(int rc)
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22 {
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23 exit(rc);
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24 }
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25
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26 int
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27 LoadSprite(char *file, SDL_Renderer *renderer)
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28 {
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29 SDL_Surface *temp;
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30
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31 /* Load the sprite image */
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32 temp = SDL_LoadBMP(file);
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33 if (temp == NULL) {
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34 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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35 return (-1);
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36 }
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37 sprite_w = temp->w;
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38 sprite_h = temp->h;
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39
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40 /* Set transparent pixel as the pixel at (0,0) */
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41 if (temp->format->palette) {
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42 SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels);
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43 } else {
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44 switch (temp->format->BitsPerPixel) {
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45 case 15:
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46 SDL_SetColorKey(temp, SDL_TRUE,
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47 (*(Uint16 *) temp->pixels) & 0x00007FFF);
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48 break;
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49 case 16:
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50 SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
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51 break;
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52 case 24:
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53 SDL_SetColorKey(temp, SDL_TRUE,
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54 (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
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55 break;
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56 case 32:
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57 SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
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58 break;
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59 }
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60 }
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61
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62 /* Create textures from the image */
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63 sprite = SDL_CreateTextureFromSurface(renderer, temp);
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64 if (!sprite) {
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65 fprintf(stderr, "Couldn't create texture: %s\n", SDL_GetError());
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66 SDL_FreeSurface(temp);
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67 return (-1);
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68 }
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69 SDL_FreeSurface(temp);
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70
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71 /* We're ready to roll. :) */
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72 return (0);
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73 }
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74
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75 void
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76 MoveSprites(SDL_Window * window, SDL_Renderer * renderer, SDL_Texture * sprite)
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77 {
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78 int i;
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79 int window_w = WINDOW_WIDTH;
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80 int window_h = WINDOW_HEIGHT;
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81 SDL_Rect *position, *velocity;
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82
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83 /* Draw a gray background */
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84 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
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85 SDL_RenderClear(renderer);
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86
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87 /* Move the sprite, bounce at the wall, and draw */
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88 for (i = 0; i < NUM_SPRITES; ++i) {
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89 position = &positions[i];
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90 velocity = &velocities[i];
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91 position->x += velocity->x;
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92 if ((position->x < 0) || (position->x >= (window_w - sprite_w))) {
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93 velocity->x = -velocity->x;
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94 position->x += velocity->x;
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95 }
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96 position->y += velocity->y;
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97 if ((position->y < 0) || (position->y >= (window_h - sprite_h))) {
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98 velocity->y = -velocity->y;
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99 position->y += velocity->y;
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100 }
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101
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102 /* Blit the sprite onto the screen */
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103 SDL_RenderCopy(renderer, sprite, NULL, position);
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104 }
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105
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106 /* Update the screen! */
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107 SDL_RenderPresent(renderer);
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108 }
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109
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110 int
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111 main(int argc, char *argv[])
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112 {
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113 SDL_Window *window;
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114 SDL_Renderer *renderer;
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115 int i, done;
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116 SDL_Event event;
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117
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118 window = SDL_CreateWindow("Happy Smileys",
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119 SDL_WINDOWPOS_UNDEFINED,
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120 SDL_WINDOWPOS_UNDEFINED,
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121 WINDOW_WIDTH, WINDOW_HEIGHT,
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122 SDL_WINDOW_SHOWN);
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123 if (!window) {
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124 quit(2);
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125 }
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126
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127 renderer = SDL_CreateRenderer(window, -1, 0);
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128 if (!renderer) {
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129 quit(2);
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130 }
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131
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132 if (LoadSprite("icon.bmp", renderer) < 0) {
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133 quit(2);
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134 }
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135
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136 /* Initialize the sprite positions */
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137 srand(time(NULL));
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138 for (i = 0; i < NUM_SPRITES; ++i) {
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139 positions[i].x = rand() % (WINDOW_WIDTH - sprite_w);
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140 positions[i].y = rand() % (WINDOW_HEIGHT - sprite_h);
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141 positions[i].w = sprite_w;
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142 positions[i].h = sprite_h;
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143 velocities[i].x = 0;
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144 velocities[i].y = 0;
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145 while (!velocities[i].x && !velocities[i].y) {
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146 velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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147 velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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148 }
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149 }
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150
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151 /* Main render loop */
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152 done = 0;
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153 while (!done) {
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154 /* Check for events */
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155 while (SDL_PollEvent(&event)) {
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156 if (event.type == SDL_QUIT || event.type == SDL_KEYDOWN) {
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157 done = 1;
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158 }
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159 }
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160 MoveSprites(window, renderer, sprite);
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161 }
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162
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163 quit(0);
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164 }
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165
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166 /* vi: set ts=4 sw=4 expandtab: */