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;
}
Esempio n. 2
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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;
}
Esempio n. 4
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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;
}