74 lines
2.1 KiB
Matlab
74 lines
2.1 KiB
Matlab
|
//
|
||
|
|
// rwpng_cocoa.m
|
||
|
|
// pngquant
|
||
|
|
//
|
||
|
|
|
||
|
|
#include "rwpng.h"
|
||
|
|
|
||
|
|
#ifdef USE_COCOA
|
||
|
|
|
||
|
|
#import <Cocoa/Cocoa.h>
|
||
|
|
#import <CoreGraphics/CoreGraphics.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "lib/libimagequant.h"
|
||
|
|
#include "lib/pam.h"
|
||
|
|
|
||
|
|
int rwpng_read_image24_cocoa(FILE *fp, png24_image *out)
|
||
|
|
{
|
||
|
|
rgba_pixel *pixel_data;
|
||
|
|
int width, height;
|
||
|
|
@autoreleasepool {
|
||
|
|
NSFileHandle *fh = [[NSFileHandle alloc] initWithFileDescriptor:fileno(fp)];
|
||
|
|
NSData *data = [fh readDataToEndOfFile];
|
||
|
|
out->file_size = [data length];
|
||
|
|
CGImageRef image = [[NSBitmapImageRep imageRepWithData:data] CGImage];
|
||
|
|
[fh release];
|
||
|
|
|
||
|
|
if (!image) return READ_ERROR;
|
||
|
|
|
||
|
|
width = CGImageGetWidth(image);
|
||
|
|
height = CGImageGetHeight(image);
|
||
|
|
|
||
|
|
pixel_data = calloc(width*height,4);
|
||
|
|
|
||
|
|
CGColorSpaceRef colorspace = CGColorSpaceCreateWithName(kCGColorSpaceSRGB);
|
||
|
|
|
||
|
|
CGContextRef context = CGBitmapContextCreate(pixel_data,
|
||
|
|
width, height,
|
||
|
|
8, width*4,
|
||
|
|
colorspace,
|
||
|
|
kCGImageAlphaPremultipliedLast);
|
||
|
|
|
||
|
|
CGColorSpaceRelease(colorspace);
|
||
|
|
|
||
|
|
if (!context) return READ_ERROR;
|
||
|
|
|
||
|
|
CGContextDrawImage(context, CGRectMake(0.0, 0.0, width, height), image);
|
||
|
|
CGContextRelease(context);
|
||
|
|
}
|
||
|
|
// reverse premultiplication
|
||
|
|
|
||
|
|
for(int i=0; i < width*height; i++) {
|
||
|
|
if (pixel_data[i].a) {
|
||
|
|
pixel_data[i] = (rgba_pixel){
|
||
|
|
.a = pixel_data[i].a,
|
||
|
|
.r = pixel_data[i].r*255/pixel_data[i].a,
|
||
|
|
.g = pixel_data[i].g*255/pixel_data[i].a,
|
||
|
|
.b = pixel_data[i].b*255/pixel_data[i].a,
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
out->gamma = 0.45455;
|
||
|
|
out->width = width;
|
||
|
|
out->height = height;
|
||
|
|
out->rgba_data = (unsigned char *)pixel_data;
|
||
|
|
out->row_pointers = malloc(sizeof(out->row_pointers[0])*out->height);
|
||
|
|
for(int i=0; i < out->height; i++) {
|
||
|
|
out->row_pointers[i] = (unsigned char *)&pixel_data[width*i];
|
||
|
|
}
|
||
|
|
return SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|