// Flips an image over its x axis
ILboolean ilFlipImage(ILimage* image)
{
if (image == NULL) {
il2SetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
image->Origin = (image->Origin == IL_ORIGIN_LOWER_LEFT) ?
IL_ORIGIN_UPPER_LEFT : IL_ORIGIN_LOWER_LEFT;
iFlipBuffer(image->Data, image->Depth, image->Bps, image->Height);
return IL_TRUE;
}
// Internal function used to save the Hdr.
ILboolean iSaveHdrInternal()
{
ILimage *TempImage;
rgbe_header_info stHeader;
unsigned char rgbe[4];
ILubyte *buffer;
ILfloat *data;
ILuint i;
ILboolean bRet;
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
stHeader.exposure = 0;
stHeader.gamma = 0;
stHeader.programtype[0] = 0;
stHeader.valid = 0;
if (iCurImage->Format != IL_UNSIGNED_BYTE) {
TempImage = iConvertImage(iCurImage, IL_RGB, IL_FLOAT);
if (TempImage == NULL)
return IL_FALSE;
}
else
TempImage = iCurImage;
if (!RGBE_WriteHeader(TempImage->Width, TempImage->Height, &stHeader))
return IL_FALSE;
if (TempImage->Origin == IL_ORIGIN_LOWER_LEFT)
iFlipBuffer(TempImage->Data,TempImage->Depth,TempImage->Bps,TempImage->Height);
data = (ILfloat*)TempImage->Data;
if ((TempImage->Width < 8)||(TempImage->Width > 0x7fff)) {
/* run length encoding is not allowed so write flat*/
bRet = RGBE_WritePixels(data,TempImage->Width*TempImage->Height);
if (iCurImage != TempImage)
ilCloseImage(TempImage);
return bRet;
}
buffer = (ILubyte*)ialloc(sizeof(ILubyte)*4*TempImage->Width);
if (buffer == NULL) {
/* no buffer space so write flat */
bRet = RGBE_WritePixels(data,TempImage->Width*TempImage->Height);
if (iCurImage != TempImage)
ilCloseImage(TempImage);
return bRet;
}
while(TempImage->Height-- > 0) {
rgbe[0] = 2;
rgbe[1] = 2;
rgbe[2] = TempImage->Width >> 8;
rgbe[3] = TempImage->Width & 0xFF;
if (iwrite(rgbe, sizeof(rgbe), 1) < 1) {
free(buffer);
if (iCurImage != TempImage)
ilCloseImage(TempImage);
return IL_FALSE;
}
for(i=0;i<TempImage->Width;i++) {
float2rgbe(rgbe,data[RGBE_DATA_RED],data[RGBE_DATA_GREEN],data[RGBE_DATA_BLUE]);
buffer[i] = rgbe[0];
buffer[i+TempImage->Width] = rgbe[1];
buffer[i+2*TempImage->Width] = rgbe[2];
buffer[i+3*TempImage->Width] = rgbe[3];
data += RGBE_DATA_SIZE;
}
/* write out each of the four channels separately run length encoded */
/* first red, then green, then blue, then exponent */
for(i=0;i<4;i++) {
if (RGBE_WriteBytes_RLE(&buffer[i*TempImage->Width],TempImage->Width) != IL_TRUE) {
ifree(buffer);
if (iCurImage != TempImage)
ilCloseImage(TempImage);
return IL_FALSE;
}
}
}
ifree(buffer);
if (iCurImage != TempImage)
ilCloseImage(TempImage);
return IL_TRUE;
}
