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comparison render_sdl.c @ 342:13f994c88c34

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Get frame time correct and frame rate sort of correct for EUR region
author Mike Pavone <pavone@retrodev.com>
date Thu, 16 May 2013 09:37:53 -0700
parents 58a085cfc6bd
children 15dd6418fe67
comparison
equal deleted inserted replaced
341:6ad8e36de685 342:13f994c88c34
12 12
13 int32_t color_map[1 << 12]; 13 int32_t color_map[1 << 12];
14 uint8_t levels[] = {0, 27, 49, 71, 87, 103, 119, 130, 146, 157, 174, 190, 206, 228, 255}; 14 uint8_t levels[] = {0, 27, 49, 71, 87, 103, 119, 130, 146, 157, 174, 190, 206, 228, 255};
15 15
16 uint32_t min_delay; 16 uint32_t min_delay;
17 uint32_t frame_delay = 1000/60;
17 18
18 void render_init(int width, int height, char * title) 19 void render_init(int width, int height, char * title)
19 { 20 {
20 if (SDL_Init(SDL_INIT_VIDEO) < 0) { 21 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
21 fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError()); 22 fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
227 #define BUTTON_A 0x10 228 #define BUTTON_A 0x10
228 #define BUTTON_B 0x10 229 #define BUTTON_B 0x10
229 #define BUTTON_START 0x20 230 #define BUTTON_START 0x20
230 #define BUTTON_C 0x20 231 #define BUTTON_C 0x20
231 232
232 #define FRAME_DELAY 16
233 #define MIN_DELAY 5
234 uint32_t frame_counter = 0; 233 uint32_t frame_counter = 0;
235 uint32_t start = 0; 234 uint32_t start = 0;
236 int wait_render_frame(vdp_context * context, int frame_limit) 235 int wait_render_frame(vdp_context * context, int frame_limit)
237 { 236 {
238 FILE * outfile; 237 FILE * outfile;
360 } 359 }
361 } 360 }
362 if (frame_limit) { 361 if (frame_limit) {
363 //TODO: Adjust frame delay so we actually get 60 FPS rather than 62.5 FPS 362 //TODO: Adjust frame delay so we actually get 60 FPS rather than 62.5 FPS
364 uint32_t current = SDL_GetTicks(); 363 uint32_t current = SDL_GetTicks();
365 uint32_t desired = last_frame + FRAME_DELAY; 364 uint32_t desired = last_frame + frame_delay;
366 if (current < desired) { 365 if (current < desired) {
367 uint32_t delay = last_frame + FRAME_DELAY - current; 366 uint32_t delay = last_frame + frame_delay - current;
368 //TODO: Calculate MIN_DELAY at runtime 367 if (delay > min_delay) {
369 if (delay > MIN_DELAY) { 368 SDL_Delay((delay/min_delay)*min_delay);
370 SDL_Delay((delay/MIN_DELAY)*MIN_DELAY);
371 } 369 }
372 while ((desired) >= SDL_GetTicks()) { 370 while ((desired) >= SDL_GetTicks()) {
373 } 371 }
374 } 372 }
375 } 373 }
387 frame_counter = 0; 385 frame_counter = 0;
388 }*/ 386 }*/
389 return ret; 387 return ret;
390 } 388 }
391 389
392 390 void render_fps(uint32_t fps)
391 {
392 frame_delay = 1000/fps;
393 }
394
395