bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output) {
size_t size = stream->getLength();
void* ptr = sk_malloc_throw(size);
stream->read(ptr, size);
CGDataProviderRef data = CGDataProviderCreateWithData(NULL, ptr, size,
CGDataProviderReleaseData_FromMalloc);
if (NULL == data) {
return false;
}
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(data);
CGDataProviderRelease(data);
if (NULL == pdf) {
return false;
}
SkAutoPDFRelease releaseMe(pdf);
CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);
if (NULL == page) {
return false;
}
CGRect bounds = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
int w = (int)CGRectGetWidth(bounds);
int h = (int)CGRectGetHeight(bounds);
SkBitmap bitmap;
if (!bitmap.allocPixels(SkImageInfo::MakeN32Premul(w, h))) {
return false;
}
bitmap.eraseColor(SK_ColorWHITE);
size_t bitsPerComponent;
CGBitmapInfo info;
getBitmapInfo(bitmap, &bitsPerComponent, &info, NULL);
CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
CGContextRef ctx = CGBitmapContextCreate(bitmap.getPixels(), w, h,
bitsPerComponent, bitmap.rowBytes(),
cs, info);
CGColorSpaceRelease(cs);
if (ctx) {
CGContextDrawPDFPage(ctx, page);
CGContextRelease(ctx);
}
output->swap(bitmap);
return true;
}
bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output) {
CGDataProviderRef data = SkCreateDataProviderFromStream(stream);
if (NULL == data) {
return false;
}
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(data);
CGDataProviderRelease(data);
if (NULL == pdf) {
return false;
}
SkAutoPDFRelease releaseMe(pdf);
CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);
if (NULL == page) {
return false;
}
CGRect bounds = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
int w = (int)CGRectGetWidth(bounds);
int h = (int)CGRectGetHeight(bounds);
SkBitmap bitmap;
if (!bitmap.tryAllocN32Pixels(w, h)) {
return false;
}
bitmap.eraseColor(SK_ColorWHITE);
size_t bitsPerComponent;
CGBitmapInfo info;
getBitmapInfo(bitmap, &bitsPerComponent, &info, NULL);
CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
CGContextRef ctx = CGBitmapContextCreate(bitmap.getPixels(), w, h,
bitsPerComponent, bitmap.rowBytes(),
cs, info);
CGColorSpaceRelease(cs);
if (ctx) {
CGContextDrawPDFPage(ctx, page);
CGContextRelease(ctx);
}
output->swap(bitmap);
return true;
}
static SkBitmap* prepareForImageRef(const SkBitmap& bm,
size_t* bitsPerComponent,
CGBitmapInfo* info) {
bool upscaleTo32;
if (!getBitmapInfo(bm, bitsPerComponent, info, &upscaleTo32)) {
return NULL;
}
SkBitmap* copy;
if (upscaleTo32) {
copy = new SkBitmap;
// here we make a ceep copy of the pixels, since CG won't take our
// 565 directly
bm.copyTo(copy, SkBitmap::kARGB_8888_Config);
} else {
copy = new SkBitmap(bm);
}
return copy;
}
int main() {
char *processedImageName = "processed.bmp";
char *fileName = "test.bmp";
int fileLenght = getLenghtOfFile(fileName);
char *buffer = readFile(fileName, fileLenght);
int* info = getBitmapInfo(buffer);
printf("Szerokosc: %d\n", info[0]);
printf("Wysokosc: %d\n", info[1]);
printf("Poczatek danych: %d\n", info[2]);
printf("Wielkosc pliku: %d bajtów\n", info[3]);
printf("Bitów na pixel: %d-bits\n", info[4]);
printf("Typ kompresji: %d\n", info[5]);
char *data = getBitmapContent(buffer, info);
remove(processedImageName);
negateImage(data, fileLenght);
saveFile(buffer, fileLenght, processedImageName);
return 0;
}
