mirror of
https://github.com/joel16/SDL2.git
synced 2024-12-13 14:07:38 +00:00
590 lines
13 KiB
C
590 lines
13 KiB
C
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/* Bring up a window and play with it */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#define BENCHMARK_SDL
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#define NOTICE(X) printf("%s", X);
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#define WINDOW_WIDTH 640
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#define WINDOW_HEIGHT 480
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#include "SDL.h"
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SDL_Surface *screen, *pic;
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SDL_Overlay *overlay;
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int scale;
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int monochrome;
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int luminance;
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int w, h;
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/* NOTE: These RGB conversion functions are not intended for speed,
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only as examples.
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*/
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void RGBtoYUV(Uint8 *rgb, int *yuv, int monochrome, int luminance)
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{
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int i;
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if (monochrome)
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{
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#if 1 /* these are the two formulas that I found on the FourCC site... */
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yuv[0] = 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
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yuv[1] = 128;
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yuv[2] = 128;
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#else
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yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
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yuv[1] = 128;
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yuv[2] = 128;
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#endif
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}
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else
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{
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#if 1 /* these are the two formulas that I found on the FourCC site... */
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yuv[0] = 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
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yuv[1] = (rgb[2]-yuv[0])*0.565 + 128;
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yuv[2] = (rgb[0]-yuv[0])*0.713 + 128;
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#else
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yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
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yuv[1] = 128 - (0.148 * rgb[0]) - (0.291 * rgb[1]) + (0.439 * rgb[2]);
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yuv[2] = 128 + (0.439 * rgb[0]) - (0.368 * rgb[1]) - (0.071 * rgb[2]);
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#endif
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}
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if (luminance!=100)
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{
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yuv[0]=yuv[0]*luminance/100;
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if (yuv[0]>255)
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yuv[0]=255;
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}
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/* clamp values...if you need to, we don't seem to have a need */
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/*
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for(i=0;i<3;i++)
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{
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if(yuv[i]<0)
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yuv[i]=0;
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if(yuv[i]>255)
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yuv[i]=255;
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}
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*/
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}
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ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
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{
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int x,y;
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int yuv[3];
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Uint8 *p,*op[3];
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SDL_LockSurface(s);
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SDL_LockYUVOverlay(o);
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/* Black initialization */
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/*
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memset(o->pixels[0],0,o->pitches[0]*o->h);
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memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
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memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
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*/
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/* Convert */
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for(y=0; y<s->h && y<o->h; y++)
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{
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p=((Uint8 *) s->pixels)+s->pitch*y;
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op[0]=o->pixels[0]+o->pitches[0]*y;
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op[1]=o->pixels[1]+o->pitches[1]*(y/2);
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op[2]=o->pixels[2]+o->pitches[2]*(y/2);
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for(x=0; x<s->w && x<o->w; x++)
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{
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RGBtoYUV(p, yuv, monochrome, luminance);
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*(op[0]++)=yuv[0];
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if(x%2==0 && y%2==0)
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{
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*(op[1]++)=yuv[2];
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*(op[2]++)=yuv[1];
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}
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p+=s->format->BytesPerPixel;
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}
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}
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SDL_UnlockYUVOverlay(o);
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SDL_UnlockSurface(s);
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}
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ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
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{
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int x,y;
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int yuv[3];
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Uint8 *p,*op[3];
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SDL_LockSurface(s);
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SDL_LockYUVOverlay(o);
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/* Black initialization */
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/*
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memset(o->pixels[0],0,o->pitches[0]*o->h);
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memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
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memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
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*/
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/* Convert */
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for(y=0; y<s->h && y<o->h; y++)
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{
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p=((Uint8 *) s->pixels)+s->pitch*y;
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op[0]=o->pixels[0]+o->pitches[0]*y;
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op[1]=o->pixels[1]+o->pitches[1]*(y/2);
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op[2]=o->pixels[2]+o->pitches[2]*(y/2);
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for(x=0; x<s->w && x<o->w; x++)
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{
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RGBtoYUV(p,yuv, monochrome, luminance);
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*(op[0]++)=yuv[0];
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if(x%2==0 && y%2==0)
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{
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*(op[1]++)=yuv[1];
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*(op[2]++)=yuv[2];
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}
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p+=s->format->BytesPerPixel;
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}
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}
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SDL_UnlockYUVOverlay(o);
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SDL_UnlockSurface(s);
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}
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ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
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{
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int x,y;
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int yuv[3];
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Uint8 *p,*op;
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SDL_LockSurface(s);
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SDL_LockYUVOverlay(o);
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for(y=0; y<s->h && y<o->h; y++)
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{
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p=((Uint8 *) s->pixels)+s->pitch*y;
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op=o->pixels[0]+o->pitches[0]*y;
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for(x=0; x<s->w && x<o->w; x++)
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{
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RGBtoYUV(p, yuv, monochrome, luminance);
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if(x%2==0)
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{
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*(op++)=yuv[1];
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*(op++)=yuv[0];
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*(op++)=yuv[2];
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}
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else
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*(op++)=yuv[0];
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p+=s->format->BytesPerPixel;
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}
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}
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SDL_UnlockYUVOverlay(o);
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SDL_UnlockSurface(s);
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}
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ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
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{
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int x,y;
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int yuv[3];
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Uint8 *p,*op;
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SDL_LockSurface(s);
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SDL_LockYUVOverlay(o);
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for(y=0; y<s->h && y<o->h; y++)
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{
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p=((Uint8 *) s->pixels)+s->pitch*y;
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op=o->pixels[0]+o->pitches[0]*y;
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for(x=0; x<s->w && x<o->w; x++)
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{
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RGBtoYUV(p,yuv, monochrome, luminance);
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if(x%2==0)
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{
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*(op++)=yuv[0];
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*(op++)=yuv[2];
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op[1]=yuv[1];
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}
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else
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{
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*op=yuv[0];
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op+=2;
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}
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p+=s->format->BytesPerPixel;
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}
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}
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SDL_UnlockYUVOverlay(o);
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SDL_UnlockSurface(s);
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}
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ConvertRGBtoYUY2(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
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{
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int x,y;
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int yuv[3];
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Uint8 *p,*op;
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SDL_LockSurface(s);
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SDL_LockYUVOverlay(o);
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for(y=0; y<s->h && y<o->h; y++)
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{
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p=((Uint8 *) s->pixels)+s->pitch*y;
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op=o->pixels[0]+o->pitches[0]*y;
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for(x=0; x<s->w && x<o->w; x++)
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{
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RGBtoYUV(p,yuv, monochrome, luminance);
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if(x%2==0)
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{
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*(op++)=yuv[0];
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*(op++)=yuv[1];
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op[1]=yuv[2];
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}
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else
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{
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*op=yuv[0];
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op+=2;
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}
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p+=s->format->BytesPerPixel;
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}
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}
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SDL_UnlockYUVOverlay(o);
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SDL_UnlockSurface(s);
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}
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void Draw()
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{
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SDL_Rect rect;
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int i;
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int disp;
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if(!scale)
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{
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rect.w=overlay->w;
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rect.h=overlay->h;
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for(i=0; i<h-rect.h && i<w-rect.w; i++)
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{
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rect.x=i;
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rect.y=i;
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SDL_DisplayYUVOverlay(overlay,&rect);
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}
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}
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else
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{
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rect.w=overlay->w/2;
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rect.h=overlay->h/2;
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rect.x=(w-rect.w)/2;
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rect.y=(h-rect.h)/2;
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disp=rect.y-1;
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for(i=0; i<disp; i++)
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{
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rect.w+=2;
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rect.h+=2;
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rect.x--;
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rect.y--;
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SDL_DisplayYUVOverlay(overlay,&rect);
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}
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}
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printf("Displayed %d times.\n",i);
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}
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static void PrintUsage(char *argv0)
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{
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fprintf(stderr, "Usage: %s [arg] [arg] [arg] ...\n", argv0);
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fprintf(stderr, "Where 'arg' is one of:\n");
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fprintf(stderr, " -delay <seconds>\n");
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fprintf(stderr, " -width <pixels>\n");
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fprintf(stderr, " -height <pixels>\n");
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fprintf(stderr, " -bpp <bits>\n");
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fprintf(stderr, " -format <fmt> (one of the: YV12, IYUV, YUY2, UYVY, YVYU)\n");
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fprintf(stderr, " -hw\n");
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fprintf(stderr, " -flip\n");
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fprintf(stderr, " -scale (test scaling features, from 50%% upto window size)\n");
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fprintf(stderr, " -mono (use monochromatic RGB2YUV conversion)\n");
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fprintf(stderr, " -lum <perc> (use luminance correction during RGB2YUV conversion,\n");
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fprintf(stderr, " from 0%% to unlimited, normal is 100%%)\n");
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fprintf(stderr, " -help (shows this help)\n");
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fprintf(stderr, " -fullscreen (test overlay in fullscreen mode)\n");
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}
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int main(int argc, char **argv)
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{
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char *argv0 = argv[0];
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int flip;
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int delay;
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int desired_bpp;
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Uint32 video_flags, overlay_format;
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char *bmpfile;
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#ifdef BENCHMARK_SDL
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Uint32 then, now;
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#endif
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int i;
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/* Set default options and check command-line */
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flip = 0;
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scale=0;
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monochrome=0;
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luminance=100;
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delay = 1;
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w = WINDOW_WIDTH;
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h = WINDOW_HEIGHT;
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desired_bpp = 0;
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video_flags = 0;
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overlay_format = SDL_YV12_OVERLAY;
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while ( argc > 1 ) {
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if ( strcmp(argv[1], "-delay") == 0 ) {
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if ( argv[2] ) {
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delay = atoi(argv[2]);
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -delay option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-width") == 0 ) {
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if ( argv[2] && ((w = atoi(argv[2])) > 0) ) {
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -width option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-height") == 0 ) {
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if ( argv[2] && ((h = atoi(argv[2])) > 0) ) {
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -height option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-bpp") == 0 ) {
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if ( argv[2] ) {
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desired_bpp = atoi(argv[2]);
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -bpp option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-lum") == 0 ) {
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if ( argv[2] ) {
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luminance = atoi(argv[2]);
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -lum option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-format") == 0 ) {
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if ( argv[2] ) {
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if(!strcmp(argv[2],"YV12"))
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overlay_format = SDL_YV12_OVERLAY;
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else if(!strcmp(argv[2],"IYUV"))
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overlay_format = SDL_IYUV_OVERLAY;
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else if(!strcmp(argv[2],"YUY2"))
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overlay_format = SDL_YUY2_OVERLAY;
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else if(!strcmp(argv[2],"UYVY"))
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overlay_format = SDL_UYVY_OVERLAY;
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else if(!strcmp(argv[2],"YVYU"))
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overlay_format = SDL_YVYU_OVERLAY;
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else
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{
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fprintf(stderr, "The -format option %s is not recognized\n",argv[2]);
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exit(1);
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}
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argv += 2;
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argc -= 2;
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} else {
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fprintf(stderr,
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"The -format option requires an argument\n");
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exit(1);
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}
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} else
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if ( strcmp(argv[1], "-hw") == 0 ) {
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video_flags |= SDL_HWSURFACE;
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argv += 1;
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argc -= 1;
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} else
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if ( strcmp(argv[1], "-flip") == 0 ) {
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video_flags |= SDL_DOUBLEBUF;
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argv += 1;
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argc -= 1;
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} else
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if ( strcmp(argv[1], "-scale") == 0 ) {
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scale = 1;
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argv += 1;
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argc -= 1;
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} else
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if ( strcmp(argv[1], "-mono") == 0 ) {
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monochrome = 1;
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argv += 1;
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argc -= 1;
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} else
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if (( strcmp(argv[1], "-help") == 0 ) || (strcmp(argv[1], "-h") == 0)) {
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PrintUsage(argv0);
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exit(1);
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} else
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if ( strcmp(argv[1], "-fullscreen") == 0 ) {
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video_flags |= SDL_FULLSCREEN;
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argv += 1;
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argc -= 1;
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} else
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break;
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}
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if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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fprintf(stderr,
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"Couldn't initialize SDL: %s\n", SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit); /* Clean up on exit */
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/* Initialize the display */
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screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
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if ( screen == NULL ) {
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fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
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w, h, desired_bpp, SDL_GetError());
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exit(1);
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}
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printf("Set%s %dx%dx%d mode\n",
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screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
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screen->w, screen->h, screen->format->BitsPerPixel);
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printf("(video surface located in %s memory)\n",
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(screen->flags&SDL_HWSURFACE) ? "video" : "system");
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if ( screen->flags & SDL_DOUBLEBUF ) {
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printf("Double-buffering enabled\n");
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flip = 1;
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}
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/* Set the window manager title bar */
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SDL_WM_SetCaption("SDL test overlay", "testoverlay");
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/* Load picture */
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bmpfile=(argv[1]?argv[1]:"sample.bmp");
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pic = SDL_LoadBMP(bmpfile);
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if ( pic == NULL ) {
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fprintf(stderr, "Couldn't load %s: %s\n", bmpfile,
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SDL_GetError());
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exit(1);
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}
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/* Convert the picture to 32bits, for easy conversion */
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{
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SDL_Surface *newsurf;
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SDL_PixelFormat format;
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format.palette=NULL;
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format.BitsPerPixel=32;
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format.BytesPerPixel=4;
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#if SDL_BYTEORDER == SDL_LIL_ENDIAN
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format.Rshift=0;
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format.Gshift=8;
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format.Bshift=16;
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#else
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format.Rshift=24;
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format.Gshift=16;
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format.Bshift=8;
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#endif
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format.Ashift=0;
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format.Rmask=0xff<<format.Rshift;
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format.Gmask=0xff<<format.Gshift;
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format.Bmask=0xff<<format.Bshift;
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format.Amask=0;
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format.Rloss=0;
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format.Gloss=0;
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format.Bloss=0;
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format.Aloss=8;
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format.colorkey=0;
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format.alpha=0;
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newsurf=SDL_ConvertSurface(pic, &format, SDL_SWSURFACE);
|
|
if(!newsurf)
|
|
{
|
|
fprintf(stderr, "Couldn't convert picture to 32bits RGB: %s\n",
|
|
SDL_GetError());
|
|
exit(1);
|
|
}
|
|
SDL_FreeSurface(pic);
|
|
pic=newsurf;
|
|
}
|
|
|
|
/* Create the overlay */
|
|
overlay = SDL_CreateYUVOverlay(pic->w, pic->h, overlay_format, screen);
|
|
if ( overlay == NULL ) {
|
|
fprintf(stderr, "Couldn't create overlay: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
printf("Created %dx%dx%d %s %s overlay\n",overlay->w,overlay->h,overlay->planes,
|
|
overlay->hw_overlay?"hardware":"software",
|
|
overlay->format==SDL_YV12_OVERLAY?"YV12":
|
|
overlay->format==SDL_IYUV_OVERLAY?"IYUV":
|
|
overlay->format==SDL_YUY2_OVERLAY?"YUY2":
|
|
overlay->format==SDL_UYVY_OVERLAY?"UYVY":
|
|
overlay->format==SDL_YVYU_OVERLAY?"YVYU":
|
|
"Unknown");
|
|
for(i=0; i<overlay->planes; i++)
|
|
{
|
|
printf(" plane %d: pitch=%d\n", i, overlay->pitches[i]);
|
|
}
|
|
|
|
/* Convert to YUV, and draw to the overlay */
|
|
#ifdef BENCHMARK_SDL
|
|
then = SDL_GetTicks();
|
|
#endif
|
|
switch(overlay->format)
|
|
{
|
|
case SDL_YV12_OVERLAY:
|
|
ConvertRGBtoYV12(pic,overlay,monochrome,luminance);
|
|
break;
|
|
case SDL_UYVY_OVERLAY:
|
|
ConvertRGBtoUYVY(pic,overlay,monochrome,luminance);
|
|
break;
|
|
case SDL_YVYU_OVERLAY:
|
|
ConvertRGBtoYVYU(pic,overlay,monochrome,luminance);
|
|
break;
|
|
case SDL_YUY2_OVERLAY:
|
|
ConvertRGBtoYUY2(pic,overlay,monochrome,luminance);
|
|
break;
|
|
case SDL_IYUV_OVERLAY:
|
|
ConvertRGBtoIYUV(pic,overlay,monochrome,luminance);
|
|
break;
|
|
default:
|
|
printf("cannot convert RGB picture to obtained YUV format!\n");
|
|
exit(1);
|
|
break;
|
|
}
|
|
#ifdef BENCHMARK_SDL
|
|
now = SDL_GetTicks();
|
|
printf("Conversion Time: %d milliseconds\n", now-then);
|
|
#endif
|
|
|
|
/* Do all the drawing work */
|
|
#ifdef BENCHMARK_SDL
|
|
then = SDL_GetTicks();
|
|
#endif
|
|
Draw();
|
|
#ifdef BENCHMARK_SDL
|
|
now = SDL_GetTicks();
|
|
printf("Time: %d milliseconds\n", now-then);
|
|
#endif
|
|
SDL_Delay(delay*1000);
|
|
return(0);
|
|
}
|
|
|