High Resolution Image #13
Description
Hi:
I Think this can make high resolution QR Image
( Make a bigger Matrix)
////////////////////////////////////////////////////////////////////////////////////////////////////
-
(UIImage *)imageForMatrix:(QRMatrix *)matrix {
int width = matrix.width;
int height = matrix.height;int bl = 8; // this is make more big matrix
QRMatrix _newMatrix = [[QRMatrix alloc] initWithWidth:width_bl height:height*bl];
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
int
blx = x * bl,
bly = y * bl;
for(int blax = 0; blax<bl ; blax++){
for(int blay = 0; blay<bl ;blay++){
[newMatrix setX:blx+blax y:bly+blay value:[matrix getX:x y:y]];
}
}
}
}matrix = newMatrix;
width = matrix.width;
height = matrix.height;unsigned char *bytes = (unsigned char *)malloc(width * height * 4);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
BOOL bit = [matrix getX:x y:y];
unsigned char intensity = bit ? 0 : 255;
for(int i = 0; i < 3; i++) {
bytes[y * width * 4 + x * 4 + i] = intensity;
}
bytes[y * width * 4 + x * 4 + 3] = 255;
}
}//int width = 32;
//int height = 32;
//unsigned char *bytes = (unsigned char *)malloc(width * height);
//memset(bytes, 255, width * height * 4);CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef c = CGBitmapContextCreate(bytes, width, height, 8, 4 * width, colorSpace, kCGImageAlphaPremultipliedLast);
CFRelease(colorSpace);
CGImageRef image = CGBitmapContextCreateImage(c);
CFRelease(c);
UIImage *image2 = [UIImage imageWithCGImage:image];
CFRelease(image);
return image2;
}