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#import <Accelerate/Accelerate.h>
#import <QuartzCore/QuartzCore.h>
#import <Quartz/Quartz.h>
#include "llimagej2cquartz.h"
#if defined(__BIG_ENDIAN__)
CGImageAlphaInfo const kDefaultAlphaLocation = kCGImageAlphaPremultipliedLast;
#else
CGImageAlphaInfo const kDefaultAlphaLocation = kCGImageAlphaPremultipliedFirst;
#endif
BOOL decodeJ2CQuartz(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, S32 first_channel, S32 max_channel_count)
{
U8 *srcData = (U8*)base.getData();
int srcLen = base.getDataSize();
llinfos << "[1] compressed image size: '" << srcLen << "'" << llendl;
int width = base.getWidth();
int height = base.getHeight();
int components = base.getComponents();
S32 channels = components - first_channel;
if( channels > max_channel_count )
channels = max_channel_count;
llinfos << "[2] components: '" << components << "' - channels: '" << channels << "' - first_channel: '" << first_channel << "' - max_channel_count: '" << max_channel_count << "'" << llendl;
if(components <= first_channel || components > 4)
return FALSE;
llinfos << "[3] attempting to decode a texture: '" << width << "'X'" << height << "'@'" << components * 8 << "'" << llendl;
U8 *tgt = (U8*)raw_image.getData();
if (!tgt)
return FALSE;
raw_image.resize(width, height, channels);
size_t rowBytes = width * components;
int realLen = width * height * components;
llinfos << "[4] allocating buffer of size: '" << realLen << "' to hold temp texture data" << llendl;
unsigned char* dataplane;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSBitmapImageRep *rep = [NSBitmapImageRep alloc];
switch (components)
{
case 1:
{
rep = [[rep
initWithBitmapDataPlanes:nil
pixelsWide:width
pixelsHigh:height
bitsPerSample:8
samplesPerPixel:1
hasAlpha:NO
isPlanar:NO
colorSpaceName:NSDeviceWhiteColorSpace
bytesPerRow:rowBytes
bitsPerPixel:8
] autorelease];
memcpy([rep bitmapData], srcData, srcLen);
dataplane = (unsigned char*)malloc(realLen);
memcpy(dataplane, [rep bitmapData], realLen);
[rep release];
}
break;
case 3:
{
NSData *data = [NSData dataWithBytes:srcData length:srcLen];
rep = [rep initWithData:data];
dataplane = (unsigned char*)malloc(realLen);
memcpy(dataplane, [rep bitmapData], realLen);
[data release];
[rep release];
}
break;
case 4:
{
NSData *data = [NSData dataWithBytes:srcData length:srcLen];
rep = [rep initWithData:data];
int imgLen = [rep pixelsHigh] * [rep bytesPerRow];
if (imgLen != realLen)
{
llwarns << "decoded image buffer size (" << imgLen << ") != expected buffer size (" << realLen << ") !" << llendl;
[rep release];
[data release];
return FALSE;
}
dataplane = (unsigned char*)malloc(realLen);
memcpy(dataplane, [rep bitmapData], realLen);
vImage_Buffer vb;
vb.data = dataplane;
vb.height = [rep pixelsHigh];
vb.width = [rep pixelsWide];
vb.rowBytes = [rep bytesPerRow];
llinfos << "Attempting Alpha Unpremultiplication" << llendl;
vImageUnpremultiplyData_RGBA8888(&vb, &vb, 0);
llinfos << "Unpremultiplied Alpha" << llendl;
llwarns << "after decoding: " << [rep pixelsWide] << "'X'" << [rep pixelsHigh] << "'@'" << [rep bitsPerPixel] << "'" << llendl;
[rep release];
[data release];
}
break;
}
if (dataplane)
{
for (int h=height-1; h>=0; h--)
{
for (int w=0; w<rowBytes; w+=(first_channel + channels))
{
for (int c=first_channel; c<(first_channel + channels); c++)
memcpy(tgt++, &dataplane[h*rowBytes + w + c], sizeof(unsigned char));
}
}
free(dataplane);
llinfos << "[5] size of decoded image is: '" << width*height*channels << "'" << llendl;
return TRUE;
}
else
{
llwarns << "[5] cannot decode image !" << llendl;
}
return FALSE;
}
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