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GRAPHICS: Add some docs and sanity checks to the YUV to RGB code

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This commit is contained in:
Matthew Hoops 2011-05-18 09:41:08 -04:00
parent f8323cc672
commit affb6a38a1
2 changed files with 25 additions and 0 deletions
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7
graphics/yuv_to_rgb.cpp
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@ -203,6 +203,13 @@ namespace Graphics {
*((uint32 *)(d)) = (L[cr_r] | L[crb_g] | L[cb_b])
void convertYUV420ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
// Sanity checks
assert(dst && dst->pixels);
assert(dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4);
assert(ySrc && uSrc && vSrc);
assert((yWidth & 1) == 0);
assert((yHeight & 1) == 0);
const YUVToRGBLookup *lookup = YUVToRGBMan.getLookup(dst->format);
byte *dstPtr = (byte *)dst->pixels;

18
graphics/yuv_to_rgb.h
View File

@ -23,6 +23,12 @@
*
*/
/**
* @file
* YUV to RGB conversion used in engines:
* - sword25
*/
#ifndef GRAPHICS_YUV_TO_RGB_H
#define GRAPHICS_YUV_TO_RGB_H
@ -33,6 +39,18 @@ namespace Graphics {
struct Surface;
/**
* Convert a YUV420 image to an RGB surface
*
* @param dst the destination surface
* @param ySrc the source of the y component
* @param uSrc the source of the u component
* @param vSrc the source of the v component
* @param yWidth the width of the y surface (must be divisible by 2)
* @param yHeight the height of the y surface (must be divisible by 2)
* @param yPitch the pitch of the y surface
* @param uvPitch the pitch of the u and v surfaces
*/
void convertYUV420ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch);
} // End of namespace Graphics