SDL_stretch.c File Reference

#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_blit.h"

Go to the source code of this file.

Macros
#define	DEFINE_COPY_ROW(name, type)

Functions
static void	copy_row3 (Uint8 *src, int src_w, Uint8 *dst, int dst_w)
int	SDL_SoftStretch (SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect)
	Perform a fast, low quality, stretch blit between two surfaces of the same pixel format. More...

Macro Definition Documentation

#define DEFINE_COPY_ROW	(		name,
			type
	)

Value:

static void name(type *src, int src_w, type *dst, int dst_w)    \
{                                           \
    int i;                                  \
    int pos, inc;                           \
    type pixel = 0;                         \
                                            \
    pos = 0x10000;                          \
    inc = (src_w << 16) / dst_w;            \
    for ( i=dst_w; i>0; --i ) {             \
        while ( pos >= 0x10000L ) {         \
            pixel = *src++;                 \
            pos -= 0x10000L;                \
        }                                   \
        *dst++ = pixel;                     \
        pos += inc;                         \
    }                                       \
}

Definition at line 151 of file SDL_stretch.c.

Function Documentation

static void copy_row3 ( Uint8 *  src, int  src_w, Uint8 *  dst, int  dst_w  )

static

Definition at line 177 of file SDL_stretch.c.

References i.

Referenced by SDL_SoftStretch().

int SDL_SoftStretch	(	SDL_Surface *	src,
		const SDL_Rect *	srcrect,
		SDL_Surface *	dst,
		const SDL_Rect *	dstrect
	)

Perform a fast, low quality, stretch blit between two surfaces of the same pixel format.

Note

This function uses a static buffer, and is not thread-safe.

Definition at line 203 of file SDL_stretch.c.

References SDL_PixelFormat::BytesPerPixel, copy_row3(), SDL_Surface::format, SDL_PixelFormat::format, SDL_Rect::h, SDL_Surface::h, if(), NULL, SDL_Surface::pitch, SDL_Surface::pixels, pop, SDL_FALSE, SDL_LockSurface(), SDL_MUSTLOCK, SDL_SetError(), SDL_TRUE, SDL_UnlockSurface(), SDL_Rect::w, SDL_Surface::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_LowerBlitScaled(), and SDL_SW_CopyYUVToRGB().