---

blit_macros.h File Reference

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Compounds
struct	SDL_PixelFormat
Defines
#define	FORMAT_EQUAL(A, B)
#define	RGB_FROM_PIXEL(pixel, fmt, r, g, b)
#define	DISEMBLE_RGB(buf, bpp, fmt, pixel, r, g, b)
#define	PIXEL_FROM_RGB(pixel, fmt, r, g, b)
#define	ASSEMBLE_RGB(buf, bpp, fmt, r, g, b)
#define	RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a)
#define	DISEMBLE_RGBA(buf, bpp, fmt, pixel, r, g, b, a)
#define	PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a)
#define	ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a)
#define	ALPHA_BLEND(sR, sG, sB, A, Adiv, dR, dG, dB)

---

Define Documentation

#define ALPHA_BLEND( sR, sG, sB, A, Adiv, dR, dG, dB )

Value: { \ dR = ((unsigned short)sR*(Adiv-A) + (unsigned short)dR*A) / Adiv; \ dG = ((unsigned short)sG*(Adiv-A) + (unsigned short)dG*A) / Adiv; \ dB = ((unsigned short)sB*(Adiv-A) + (unsigned short)dB*A) / Adiv; \ } Definition at line 198 of file blit_macros.h.

#define ASSEMBLE_RGB( buf, bpp, fmt, r, g, b )

Value: { \ switch (bpp) { \ case 2: { \ unsigned short pixel; \ \ PIXEL_FROM_RGB(pixel, fmt, r, g, b); \ *((unsigned short *)(buf)) = pixel; \ } \ break; \ \ case 3: { \ *((buf)+fmt->Rshift/8) = r; \ *((buf)+fmt->Gshift/8) = g; \ *((buf)+fmt->Bshift/8) = b; \ } \ break; \ \ case 4: { \ unsigned int pixel; \ \ PIXEL_FROM_RGB(pixel, fmt, r, g, b); \ *((unsigned int *)(buf)) = pixel; \ } \ break; \ } \ } Definition at line 100 of file blit_macros.h.

#define ASSEMBLE_RGBA( buf, bpp, fmt, r, g, b, a )

Value: { \ switch (bpp) { \ case 2: { \ unsigned short pixel; \ \ PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \ *((unsigned short *)(buf)) = pixel; \ } \ break; \ \ case 3: { \ *((buf)+fmt->Rshift/8) = r; \ *((buf)+fmt->Gshift/8) = g; \ *((buf)+fmt->Bshift/8) = b; \ } \ break; \ \ case 4: { \ unsigned int pixel; \ \ PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \ *((unsigned int *)(buf)) = pixel; \ } \ break; \ } \ } Definition at line 169 of file blit_macros.h.

#define DISEMBLE_RGB( buf, bpp, fmt, pixel, r, g, b )

Value: { \ switch (bpp) { \ case 2: \ pixel = *((unsigned short *)(buf)); \ RGB_FROM_PIXEL(pixel, fmt, r, g, b); \ break; \ \ case 3: \ r = *(((unsigned char *)buf)+fmt->Rshift/8); \ g = *(((unsigned char *)buf)+fmt->Gshift/8); \ b = *(((unsigned char *)buf)+fmt->Bshift/8); \ pixel = (r<<fmt->Rshift)| \ (g<<fmt->Gshift)| \ (b<<fmt->Bshift); \ break; \ \ case 4: \ pixel = *((unsigned int *)(buf)); \ RGB_FROM_PIXEL(pixel, fmt, r, g, b); \ break; \ } \ } Definition at line 70 of file blit_macros.h.

#define DISEMBLE_RGBA( buf, bpp, fmt, pixel, r, g, b, a )

Value: { \ switch (bpp) { \ case 2: \ pixel = *((unsigned short *)(buf)); \ RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a); \ pixel &= ~fmt->Amask; \ break; \ \ case 3: \ r = *(((unsigned char *)buf)+fmt->Rshift/8); \ g = *(((unsigned char *)buf)+fmt->Gshift/8); \ b = *(((unsigned char *)buf)+fmt->Bshift/8); \ a = 0; \ pixel = (r<<fmt->Rshift)| \ (g<<fmt->Gshift)| \ (b<<fmt->Bshift); \ break; \ \ case 4: \ pixel = *((unsigned int *)(buf)); \ RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a); \ pixel &= ~fmt->Amask; \ break; \ } \ } Definition at line 135 of file blit_macros.h.

#define FORMAT_EQUAL( A, B )

Value: (((A)->BitsPerPixel == (B)->BitsPerPixel) && ((A)->Rmask == (B)->Rmask)) Definition at line 60 of file blit_macros.h.

#define PIXEL_FROM_RGB( pixel, fmt, r, g, b )

Value: { \ pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ ((g>>fmt->Gloss)<<fmt->Gshift)| \ ((b>>fmt->Bloss)<<fmt->Bshift); \ } Definition at line 94 of file blit_macros.h.

#define PIXEL_FROM_RGBA( pixel, fmt, r, g, b, a )

Value: { \ pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ ((g>>fmt->Gloss)<<fmt->Gshift)| \ ((b>>fmt->Bloss)<<fmt->Bshift)| \ (a<<fmt->Ashift); \ } Definition at line 162 of file blit_macros.h.

#define RGBA_FROM_PIXEL( pixel, fmt, r, g, b, a )

Value: { \ r = (((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ g = (((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ b = (((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ a = ((pixel&fmt->Amask)>>fmt->Ashift); \ } Definition at line 128 of file blit_macros.h.

#define RGB_FROM_PIXEL( pixel, fmt, r, g, b )

Value: { \ r = (((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ g = (((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ b = (((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ } Definition at line 64 of file blit_macros.h.

---