Mercurial > sdl-ios-xcode

comparison Xcode-iPhoneOS/Demos/src/accelerometer.c @ 5211:78db79f5a4e2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Updated the iPhone demos for the new API
author Sam Lantinga <slouken@libsdl.org>
date Sun, 06 Feb 2011 09:02:10 -0800
parents e431b888ac6c
children
comparison
equal deleted inserted replaced
5210:443a850284a1 5211:78db79f5a4e2
29 29
30 static SDL_Texture *ship = 0; /* texture for spaceship */ 30 static SDL_Texture *ship = 0; /* texture for spaceship */
31 static SDL_Texture *space = 0; /* texture for space (background */ 31 static SDL_Texture *space = 0; /* texture for space (background */
32 32
33 void 33 void
34 render(void) 34 render(SDL_Renderer *renderer)
35 { 35 {
36 36
37 37
38 /* get joystick (accelerometer) axis values and normalize them */ 38 /* get joystick (accelerometer) axis values and normalize them */
39 float ax = SDL_JoystickGetAxis(accelerometer, 0); 39 float ax = SDL_JoystickGetAxis(accelerometer, 0);
95 shipData.y = miny; 95 shipData.y = miny;
96 shipData.vy = -shipData.vy * DAMPING; 96 shipData.vy = -shipData.vy * DAMPING;
97 } 97 }
98 98
99 /* draw the background */ 99 /* draw the background */
100 SDL_RenderCopy(space, NULL, NULL); 100 SDL_RenderCopy(renderer, space, NULL, NULL);
101 101
102 /* draw the ship */ 102 /* draw the ship */
103 shipData.rect.x = shipData.x; 103 shipData.rect.x = shipData.x;
104 shipData.rect.y = shipData.y; 104 shipData.rect.y = shipData.y;
105 105
106 SDL_RenderCopy(ship, NULL, &shipData.rect); 106 SDL_RenderCopy(renderer, ship, NULL, &shipData.rect);
107 107
108 /* update screen */ 108 /* update screen */
109 SDL_RenderPresent(); 109 SDL_RenderPresent(renderer);
110 110
111 } 111 }
112 112
113 void 113 void
114 initializeTextures() 114 initializeTextures(SDL_Renderer *renderer)
115 { 115 {
116 116
117 SDL_Surface *bmp_surface; 117 SDL_Surface *bmp_surface;
118 SDL_Surface *bmp_surface_rgba;
119 int format = SDL_PIXELFORMAT_ABGR8888; /* desired texture format */
120 Uint32 Rmask, Gmask, Bmask, Amask; /* masks for desired format */
121 int bpp; /* bits per pixel for desired format */
122 118
123 /* load the ship */ 119 /* load the ship */
124 bmp_surface = SDL_LoadBMP("ship.bmp"); 120 bmp_surface = SDL_LoadBMP("ship.bmp");
125 if (bmp_surface == NULL) { 121 if (bmp_surface == NULL) {
126 fatalError("could not ship.bmp"); 122 fatalError("could not ship.bmp");
127 } 123 }
128 /* set blue to transparent on the ship */ 124 /* set blue to transparent on the ship */
129 SDL_SetColorKey(bmp_surface, 1, 125 SDL_SetColorKey(bmp_surface, 1,
130 SDL_MapRGB(bmp_surface->format, 0, 0, 255)); 126 SDL_MapRGB(bmp_surface->format, 0, 0, 255));
131 SDL_PixelFormatEnumToMasks(format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
132 /*
133 create a new RGBA surface and blit the bmp to it
134 this is an extra step, but it seems to be necessary for the color key to work
135
136 does the fact that this is necessary indicate a bug in SDL?
137 */
138 bmp_surface_rgba =
139 SDL_CreateRGBSurface(0, bmp_surface->w, bmp_surface->h, bpp, Rmask,
140 Gmask, Bmask, Amask);
141 SDL_BlitSurface(bmp_surface, NULL, bmp_surface_rgba, NULL);
142 127
143 /* create ship texture from surface */ 128 /* create ship texture from surface */
144 ship = SDL_CreateTextureFromSurface(format, bmp_surface_rgba); 129 ship = SDL_CreateTextureFromSurface(renderer, bmp_surface);
145 if (ship == 0) { 130 if (ship == 0) {
146 fatalError("could not create ship texture"); 131 fatalError("could not create ship texture");
147 } 132 }
148 SDL_SetTextureBlendMode(ship, SDL_BLENDMODE_BLEND); 133 SDL_SetTextureBlendMode(ship, SDL_BLENDMODE_BLEND);
149 134
150 /* set the width and height of the ship from the surface dimensions */ 135 /* set the width and height of the ship from the surface dimensions */
151 shipData.rect.w = bmp_surface->w; 136 shipData.rect.w = bmp_surface->w;
152 shipData.rect.h = bmp_surface->h; 137 shipData.rect.h = bmp_surface->h;
153 138
154 SDL_FreeSurface(bmp_surface_rgba);
155 SDL_FreeSurface(bmp_surface); 139 SDL_FreeSurface(bmp_surface);
156 140
157 /* load the space background */ 141 /* load the space background */
158 bmp_surface = SDL_LoadBMP("space.bmp"); 142 bmp_surface = SDL_LoadBMP("space.bmp");
159 if (bmp_surface == NULL) { 143 if (bmp_surface == NULL) {
160 fatalError("could not load space.bmp"); 144 fatalError("could not load space.bmp");
161 } 145 }
162 /* create space texture from surface */ 146 /* create space texture from surface */
163 space = SDL_CreateTextureFromSurface(format, bmp_surface); 147 space = SDL_CreateTextureFromSurface(renderer, bmp_surface);
164 if (space == 0) { 148 if (space == 0) {
165 fatalError("could not create space texture"); 149 fatalError("could not create space texture");
166 } 150 }
167 SDL_FreeSurface(bmp_surface); 151 SDL_FreeSurface(bmp_surface);
168 152
173 int 157 int
174 main(int argc, char *argv[]) 158 main(int argc, char *argv[])
175 { 159 {
176 160
177 SDL_Window *window; /* main window */ 161 SDL_Window *window; /* main window */
162 SDL_Renderer *renderer;
178 Uint32 startFrame; /* time frame began to process */ 163 Uint32 startFrame; /* time frame began to process */
179 Uint32 endFrame; /* time frame ended processing */ 164 Uint32 endFrame; /* time frame ended processing */
180 Uint32 delay; /* time to pause waiting to draw next frame */ 165 Uint32 delay; /* time to pause waiting to draw next frame */
181 int done; /* should we clean up and exit? */ 166 int done; /* should we clean up and exit? */
182 167
187 172
188 /* create main window and renderer */ 173 /* create main window and renderer */
189 window = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 174 window = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
190 SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | 175 SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN |
191 SDL_WINDOW_BORDERLESS); 176 SDL_WINDOW_BORDERLESS);
192 SDL_CreateRenderer(window, 0, 0); 177 renderer = SDL_CreateRenderer(window, 0, 0);
193 178
194 /* print out some info about joysticks and try to open accelerometer for use */ 179 /* print out some info about joysticks and try to open accelerometer for use */
195 printf("There are %d joysticks available\n", SDL_NumJoysticks()); 180 printf("There are %d joysticks available\n", SDL_NumJoysticks());
196 printf("Default joystick (index 0) is %s\n", SDL_JoystickName(0)); 181 printf("Default joystick (index 0) is %s\n", SDL_JoystickName(0));
197 accelerometer = SDL_JoystickOpen(0); 182 accelerometer = SDL_JoystickOpen(0);
206 SDL_JoystickNumBalls(accelerometer)); 191 SDL_JoystickNumBalls(accelerometer));
207 printf("joystick number of buttons = %d\n", 192 printf("joystick number of buttons = %d\n",
208 SDL_JoystickNumButtons(accelerometer)); 193 SDL_JoystickNumButtons(accelerometer));
209 194
210 /* load graphics */ 195 /* load graphics */
211 initializeTextures(); 196 initializeTextures(renderer);
212 197
213 /* setup ship */ 198 /* setup ship */
214 shipData.x = (SCREEN_WIDTH - shipData.rect.w) / 2; 199 shipData.x = (SCREEN_WIDTH - shipData.rect.w) / 2;
215 shipData.y = (SCREEN_HEIGHT - shipData.rect.h) / 2; 200 shipData.y = (SCREEN_HEIGHT - shipData.rect.h) / 2;
216 shipData.vx = 0.0f; 201 shipData.vx = 0.0f;
224 while (SDL_PollEvent(&event)) { 209 while (SDL_PollEvent(&event)) {
225 if (event.type == SDL_QUIT) { 210 if (event.type == SDL_QUIT) {
226 done = 1; 211 done = 1;
227 } 212 }
228 } 213 }
229 render(); 214 render(renderer);
230 endFrame = SDL_GetTicks(); 215 endFrame = SDL_GetTicks();
231 216
232 /* figure out how much time we have left, and then sleep */ 217 /* figure out how much time we have left, and then sleep */
233 delay = MILLESECONDS_PER_FRAME - (endFrame - startFrame); 218 delay = MILLESECONDS_PER_FRAME - (endFrame - startFrame);
234 if (delay < 0) { 219 if (delay < 0) {