void BitmapUtil::roughScale(const U8 *srcBuffer, U8 *dstBuffer, S32 components,
S32 srcWidth, S32 srcHeight, S32 dstWidth, S32 dstHeight) {
int NumPixels = dstHeight;
int IntPart = (srcHeight / dstHeight) * srcWidth;
int FractPart = srcHeight % dstHeight;
int E = 0;
const U8 *PrevSource = NULL;
while (NumPixels-- > 0) {
if (srcBuffer == PrevSource) {
memcpy(dstBuffer, dstBuffer - dstWidth * components,
dstWidth * sizeof(*dstBuffer) * components);
} else {
scaleLine(srcBuffer, dstBuffer, components, srcWidth, dstWidth);
PrevSource = srcBuffer;
} /* if */
dstBuffer += dstWidth*components;
srcBuffer += IntPart*components;
E += FractPart;
if (E >= dstHeight) {
E -= dstHeight;
srcBuffer += srcWidth*components;
}
}
}
/**
* Scales a passed surface, creating a new surface with the result
* @param srcImage Source image to scale
* @param NewWidth New width for scaled image
* @param NewHeight New height for scaled image
* @remarks Caller is responsible for freeing the returned surface
*/
static GfxSurface ResizeSurface(GfxSurface &src, int xSize, int ySize, int transIndex) {
GfxSurface s;
s.create(xSize, ySize);
Graphics::Surface srcImage = src.lockSurface();
Graphics::Surface destImage = s.lockSurface();
int *horizUsage = scaleLine(xSize, srcImage.w);
int *vertUsage = scaleLine(ySize, srcImage.h);
// Loop to create scaled version
for (int yp = 0; yp < ySize; ++yp) {
byte *destP = (byte *)destImage.getBasePtr(0, yp);
if (vertUsage[yp] == -1) {
Common::set_to(destP, destP + xSize, transIndex);
} else {
const byte *srcP = (const byte *)srcImage.getBasePtr(0, vertUsage[yp]);
for (int xp = 0; xp < xSize; ++xp) {
if (horizUsage[xp] != -1) {
const byte *tempSrcP = srcP + horizUsage[xp];
*destP++ = *tempSrcP++;
} else {
// Pixel overrun at the end of the line
*destP++ = transIndex;
}
}
}
}
// Unlock surfaces
src.unlockSurface();
s.unlockSurface();
// Delete arrays and return surface
delete[] horizUsage;
delete[] vertUsage;
return s;
}
static YOPTIMIZE_SPEED int
bltLineExt(unsigned char *opixels, int owidth, int oformat,
const unsigned char *ipixels, int iwidth, int iformat,
int *map)
{
int ibpp, obpp;
int ialphaidx;
int oalphaidx;
if (owidth <= 0) {
return YMAGINE_OK;
}
if (iwidth <= 0) {
return YMAGINE_ERROR;
}
ibpp = colorBpp(iformat);
obpp = colorBpp(oformat);
if (owidth == iwidth) {
if (iformat == oformat) {
/* Neither scaling or color transformation */
memcpy(opixels, ipixels, owidth * obpp);
return YMAGINE_OK;
}
/* No scaling but color conversion */
if (iformat == VBITMAP_COLOR_RGB) {
if (oformat == VBITMAP_COLOR_rgbA || oformat == VBITMAP_COLOR_RGBA) {
RGBtoRGBA(opixels, ipixels, iwidth);
if (oformat == VBITMAP_COLOR_rgbA) {
premultiplyRGBA(opixels, owidth, obpp);
}
return YMAGINE_OK;
}
if (oformat == VBITMAP_COLOR_Argb || oformat == VBITMAP_COLOR_ARGB) {
RGBtoARGB(opixels, ipixels, iwidth);
if (oformat == VBITMAP_COLOR_Argb) {
premultiplyARGB(opixels, owidth, obpp);
}
return YMAGINE_OK;
}
}
if (iformat == VBITMAP_COLOR_RGBA) {
if (oformat == VBITMAP_COLOR_ARGB) {
memcpy(opixels, ipixels, owidth * obpp);
RGBAtoARGB(opixels, owidth, obpp);
return YMAGINE_OK;
}
if (oformat == VBITMAP_COLOR_Argb) {
memcpy(opixels, ipixels, owidth * obpp);
RGBAtoARGB(opixels, owidth, obpp);
premultiplyARGB(opixels, owidth, obpp);
return YMAGINE_OK;
}
if (oformat == VBITMAP_COLOR_rgbA) {
memcpy(opixels, ipixels, owidth * obpp);
premultiplyRGBA(opixels, owidth, obpp);
return YMAGINE_OK;
}
}
}
if (iformat != oformat) {
int valid = 0;
/* Only support a limited set of colorspace conversions */
if (oformat == VBITMAP_COLOR_RGBA|| oformat == VBITMAP_COLOR_ARGB ||
oformat == VBITMAP_COLOR_rgbA || oformat == VBITMAP_COLOR_Argb ||
oformat == VBITMAP_COLOR_RGB) {
if (iformat == VBITMAP_COLOR_RGBA|| iformat == VBITMAP_COLOR_ARGB ||
iformat == VBITMAP_COLOR_rgbA || iformat == VBITMAP_COLOR_Argb ||
iformat == VBITMAP_COLOR_RGB || iformat == VBITMAP_COLOR_CMYK) {
valid = 1;
}
}
if (!valid) {
return YMAGINE_ERROR;
}
}
if (iformat == VBITMAP_COLOR_RGB && oformat == VBITMAP_COLOR_RGBA) {
scaleLine(opixels, owidth, VBITMAP_COLOR_RGBA, 4, 3,
ipixels, iwidth, VBITMAP_COLOR_RGB, 3, -1,
map);
} else if (iformat == VBITMAP_COLOR_RGB && oformat == VBITMAP_COLOR_rgbA) {
scaleLine(opixels, owidth, VBITMAP_COLOR_rgbA, 4, 3,
ipixels, iwidth, VBITMAP_COLOR_RGB, 3, -1,
map);
} else if (iformat == VBITMAP_COLOR_RGBA && oformat == VBITMAP_COLOR_RGBA) {
scaleLine(opixels, owidth, VBITMAP_COLOR_RGBA, 4, 3,
ipixels, iwidth, VBITMAP_COLOR_RGBA, 4, 3,
map);
} else if (iformat == VBITMAP_COLOR_RGBA && oformat == VBITMAP_COLOR_rgbA) {
scaleLine(opixels, owidth, VBITMAP_COLOR_RGBA, 4, 3,
ipixels, iwidth, VBITMAP_COLOR_rgbA, 4, 3,
map);
} else {
if (iformat == VBITMAP_COLOR_RGBA) {
ialphaidx = 3;
} else {
ialphaidx = -1;
}
if (oformat == VBITMAP_COLOR_RGBA) {
oalphaidx = 3;
} else {
oalphaidx = -1;
}
scaleLine(opixels, owidth, oformat, obpp, oalphaidx,
ipixels, iwidth, iformat, ibpp, ialphaidx,
map);
}
return YMAGINE_OK;
}
