video.c

   1 #include "video.h"
   2 #include <stdbool.h>
   3
   4 SDL_Surface *surface;
   5 bool fullscreen_active;
   6 struct vo_desc video;
   7
   8 void video_init(void) {
   9         SDL_Init(SDL_INIT_VIDEO);
  10         surface = SDL_SetVideoMode(VMODE_W, VMODE_H, 32, SDL_RESIZABLE | SDL_HWPALETTE);
  11         video.mem = surface->pixels;
  12         video.pitch = surface->pitch;
  13         video.width = VMODE_W;
  14         video.height = VMODE_H;
  15         fullscreen_active = 0;
  16 }
  17
  18 void video_cleanup(void) {
  19         if(fullscreen_active) SDL_WM_ToggleFullScreen(surface);
  20         SDL_QuitSubSystem(SDL_INIT_VIDEO);
  21 }
  22
  23 void video_update_region(int x, int y, int w, int h) {
  24         SDL_UpdateRect(surface, x, y, w, h);
  25 }
  26
  27 void video_update(void) {
  28         SDL_UpdateRect(surface, 0, 0, video.width, video.height);
  29 }
  30
  31 #include "sdl_rgb.h"
  32
  33 void video_save_rect(int x, int y, int w, int h, void* buf) {
  34         sdl_rgb_t *ptr = (sdl_rgb_t *) surface->pixels;
  35         sdl_rgb_t *out = (sdl_rgb_t *) buf;
  36         unsigned pitch = surface->pitch/4;
  37         int ix, iy;
  38         for(iy = y; iy < VMODE_H && iy < y+h; iy++) for (ix = x; ix < VMODE_W && ix < x+w; ix++) {
  39                 *out++ = ptr[iy*pitch + ix];
  40         }
  41 }
  42
  43 void video_restore_rect(int x, int y, int w, int h, const void* buf) {
  44         sdl_rgb_t *ptr = (sdl_rgb_t *) surface->pixels;
  45         const sdl_rgb_t *in = (const sdl_rgb_t *) buf;
  46         unsigned pitch = surface->pitch/4;
  47         int ix, iy;
  48         for(iy = y; iy < VMODE_H && iy < y+h; iy++) for (ix = x; ix < VMODE_W && ix < x+w; ix++) {
  49                 ptr[iy*pitch + ix] = *in++;
  50         }
  51 }
  52
  53 void video_darken_screen(void) {
  54         sdl_rgb_t *ptr = (sdl_rgb_t *) surface->pixels;
  55         unsigned pitch = surface->pitch/4;
  56         unsigned x, y;
  57         for(y = 0; y < VMODE_H; y++) for (x = 0; x < VMODE_W; x++) {
  58                 sdl_rgb_t col = ptr[y*pitch + x];
  59                 col.colors.r /= 2;
  60                 col.colors.g /= 2;
  61                 col.colors.b /= 2;
  62                 ptr[y*pitch + x] = col;
  63         }
  64 }
  65
  66 void clear_screen(void) {
  67         sdl_rgb_t *ptr = (sdl_rgb_t *) surface->pixels;
  68         unsigned pitch = surface->pitch/4;
  69         unsigned x, y;
  70         for(y = 0; y < VMODE_H; y++) for (x = 0; x < VMODE_W; x++)
  71                 ptr[y*pitch + x] = SRGB_BLACK;
  72 }
  73
  74 void toggle_fullscreen(void) {
  75         fullscreen_active = !fullscreen_active;
  76         SDL_WM_ToggleFullScreen(surface);
  77         SDL_Delay(1);
  78         clear_screen();
  79         SDL_UpdateRect(surface,0,0,VMODE_W,VMODE_H);
  80         SDL_Delay(1);
  81 }