Esempio n. 1
0
int AffineTransformFilter_ARGB(void *inData, unsigned int inRowBytes, void *outData, unsigned int outRowBytes, unsigned int height, unsigned int width, void *kernel, unsigned int kernel_height, unsigned int kernel_width, int colorChannel, vImage_Flags flags )
{
    vImage_Buffer in = { inData, height, width, inRowBytes };
    vImage_Buffer out = { outData, height, width, outRowBytes };
    TransformInfo *info = kernel; 
    Pixel_8888 backColor;
    
    backColor[0] = UCHAR_MAX * info->a;
    backColor[1] = UCHAR_MAX * info->r;
    backColor[2] = UCHAR_MAX * info->g;
    backColor[3] = UCHAR_MAX * info->b;

    return vImageAffineWarp_ARGB8888( &in, &out, NULL, &info->transformMatrix, backColor, flags );
}
Esempio n. 2
0
void ImageBufferData::putData(Uint8ClampedArray*& source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, const IntSize& size, bool accelerateRendering, bool unmultiplied, float resolutionScale)
{
    ASSERT(sourceRect.width() > 0);
    ASSERT(sourceRect.height() > 0);
    
    int originx = sourceRect.x();
    int destx = (destPoint.x() + sourceRect.x()) * resolutionScale;
    ASSERT(destx >= 0);
    ASSERT(destx < size.width());
    ASSERT(originx >= 0);
    ASSERT(originx <= sourceRect.maxX());
    
    int endx = (destPoint.x() + sourceRect.maxX()) * resolutionScale;
    ASSERT(endx <= size.width());
    
    int width = sourceRect.width();
    int destw = endx - destx;

    int originy = sourceRect.y();
    int desty = (destPoint.y() + sourceRect.y()) * resolutionScale;
    ASSERT(desty >= 0);
    ASSERT(desty < size.height());
    ASSERT(originy >= 0);
    ASSERT(originy <= sourceRect.maxY());
    
    int endy = (destPoint.y() + sourceRect.maxY()) * resolutionScale;
    ASSERT(endy <= size.height());

    int height = sourceRect.height();
    int desth = endy - desty;
    
    if (width <= 0 || height <= 0)
        return;
    
    unsigned srcBytesPerRow = 4 * sourceSize.width();
    unsigned char* srcRows = source->data() + originy * srcBytesPerRow + originx * 4;
    unsigned destBytesPerRow;
    unsigned char* destRows;
    
    if (!accelerateRendering) {
        destBytesPerRow = 4 * size.width();
        destRows = reinterpret_cast<unsigned char*>(m_data) + desty * destBytesPerRow + destx * 4;
        
#if USE(ACCELERATE)
        if (haveVImageRoundingErrorFix() && unmultiplied) {
            vImage_Buffer src;
            src.height = height;
            src.width = width;
            src.rowBytes = srcBytesPerRow;
            src.data = srcRows;
            
            vImage_Buffer dst;
            dst.height = desth;
            dst.width = destw;
            dst.rowBytes = destBytesPerRow;
            dst.data = destRows;

            if (resolutionScale != 1) {
                vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
                Pixel_8888 backgroundColor;
                vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
                // The premultiplying will be done in-place.
                src = dst;
            }

            vImagePremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
            return;
        }
#endif
        if (resolutionScale != 1) {
            RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
            RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
            CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
            if (!unmultiplied)
                return;

            srcRows = destRows;
            srcBytesPerRow = destBytesPerRow;
            width = destw;
            height = desth;
        }

        for (int y = 0; y < height; ++y) {
            for (int x = 0; x < width; x++) {
                int basex = x * 4;
                unsigned char alpha = srcRows[basex + 3];
                if (unmultiplied && alpha != 255) {
                    destRows[basex] = (srcRows[basex] * alpha + 254) / 255;
                    destRows[basex + 1] = (srcRows[basex + 1] * alpha + 254) / 255;
                    destRows[basex + 2] = (srcRows[basex + 2] * alpha + 254) / 255;
                    destRows[basex + 3] = alpha;
                } else
                    reinterpret_cast<uint32_t*>(destRows + basex)[0] = reinterpret_cast<uint32_t*>(srcRows + basex)[0];
            }
            destRows += destBytesPerRow;
            srcRows += srcBytesPerRow;
        }
    } else {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
        IOSurfaceRef surface = m_surface.get();
        IOSurfaceLock(surface, 0, 0);
        destBytesPerRow = IOSurfaceGetBytesPerRow(surface);
        destRows = (unsigned char*)(IOSurfaceGetBaseAddress(surface)) + desty * destBytesPerRow + destx * 4;

#if USE(ACCELERATE)
        vImage_Buffer src;
        src.height = height;
        src.width = width;
        src.rowBytes = srcBytesPerRow;
        src.data = srcRows;

        vImage_Buffer dest;
        dest.height = desth;
        dest.width = destw;
        dest.rowBytes = destBytesPerRow;
        dest.data = destRows;

        if (resolutionScale != 1) {
            vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
            Pixel_8888 backgroundColor;
            vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
            // The unpremultiplying and channel-swapping will be done in-place.
            if (unmultiplied) {
                srcRows = destRows;
                width = destw;
                height = desth;
                srcBytesPerRow = destBytesPerRow;
            } else
                src = dest;
        }

        if (unmultiplied) {
            ScanlineData scanlineData;
            scanlineData.scanlineWidth = width;
            scanlineData.srcData = srcRows;
            scanlineData.srcRowBytes = srcBytesPerRow;
            scanlineData.destData = destRows;
            scanlineData.destRowBytes = destBytesPerRow;

            dispatch_apply_f(height, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, premultitplyScanline);
        } else {
            // Swap pixel channels from RGBA to BGRA.
            const uint8_t map[4] = { 2, 1, 0, 3 };
            vImagePermuteChannels_ARGB8888(&src, &dest, map, kvImageNoFlags);
        }
#else
        if (resolutionScale != 1) {
            RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
            RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
            CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.

            srcRows = destRows;
            srcBytesPerRow = destBytesPerRow;
            width = destw;
            height = desth;
        }

        for (int y = 0; y < height; ++y) {
            for (int x = 0; x < width; x++) {
                int basex = x * 4;
                unsigned char b = srcRows[basex];
                unsigned char alpha = srcRows[basex + 3];
                if (unmultiplied && alpha != 255) {
                    destRows[basex] = (srcRows[basex + 2] * alpha + 254) / 255;
                    destRows[basex + 1] = (srcRows[basex + 1] * alpha + 254) / 255;
                    destRows[basex + 2] = (b * alpha + 254) / 255;
                    destRows[basex + 3] = alpha;
                } else {
                    destRows[basex] = srcRows[basex + 2];
                    destRows[basex + 1] = srcRows[basex + 1];
                    destRows[basex + 2] = b;
                    destRows[basex + 3] = alpha;
                }
            }
            destRows += destBytesPerRow;
            srcRows += srcBytesPerRow;
        }
#endif // USE(ACCELERATE)

        IOSurfaceUnlock(surface, 0, 0);
#else
        ASSERT_NOT_REACHED();
#endif // USE(IOSURFACE_CANVAS_BACKING_STORE)
    }
}
Esempio n. 3
0
PassRefPtr<Uint8ClampedArray> ImageBufferData::getData(const IntRect& rect, const IntSize& size, bool accelerateRendering, bool unmultiplied, float resolutionScale) const
{
    float area = 4.0f * rect.width() * rect.height();
    if (area > static_cast<float>(std::numeric_limits<int>::max()))
        return 0;

    RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(rect.width() * rect.height() * 4);
    unsigned char* data = result->data();
    
    int endx = ceilf(rect.maxX() * resolutionScale);
    int endy = ceilf(rect.maxY() * resolutionScale);
    if (rect.x() < 0 || rect.y() < 0 || endx > size.width() || endy > size.height())
        result->zeroFill();
    
    int originx = rect.x();
    int destx = 0;
    int destw = rect.width();
    if (originx < 0) {
        destw += originx;
        destx = -originx;
        originx = 0;
    }
    destw = min<int>(destw, ceilf(size.width() / resolutionScale) - originx);
    originx *= resolutionScale;
    if (endx > size.width())
        endx = size.width();
    int width = endx - originx;
    
    int originy = rect.y();
    int desty = 0;
    int desth = rect.height();
    if (originy < 0) {
        desth += originy;
        desty = -originy;
        originy = 0;
    }
    desth = min<int>(desth, ceilf(size.height() / resolutionScale) - originy);
    originy *= resolutionScale;
    if (endy > size.height())
        endy = size.height();
    int height = endy - originy;
    
    if (width <= 0 || height <= 0)
        return result.release();
    
    unsigned destBytesPerRow = 4 * rect.width();
    unsigned char* destRows = data + desty * destBytesPerRow + destx * 4;
    
    unsigned srcBytesPerRow;
    unsigned char* srcRows;
    
    if (!accelerateRendering) {
        srcBytesPerRow = 4 * size.width();
        srcRows = reinterpret_cast<unsigned char*>(m_data) + originy * srcBytesPerRow + originx * 4;
        
#if USE(ACCELERATE)
        if (unmultiplied && haveVImageRoundingErrorFix()) {
            vImage_Buffer src;
            src.height = height;
            src.width = width;
            src.rowBytes = srcBytesPerRow;
            src.data = srcRows;
            
            vImage_Buffer dst;
            dst.height = desth;
            dst.width = destw;
            dst.rowBytes = destBytesPerRow;
            dst.data = destRows;

            if (resolutionScale != 1) {
                vImage_AffineTransform scaleTransform = { 1 / resolutionScale, 0, 0, 1 / resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
                Pixel_8888 backgroundColor;
                vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
                // The unpremultiplying will be done in-place.
                src = dst;
            }

            vImageUnpremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
            return result.release();
        }
#endif
        if (resolutionScale != 1) {
            RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
            RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
            CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
            if (!unmultiplied)
                return result.release();

            srcRows = destRows;
            srcBytesPerRow = destBytesPerRow;
            width = destw;
            height = desth;
        }
        if (unmultiplied) {
            for (int y = 0; y < height; ++y) {
                for (int x = 0; x < width; x++) {
                    int basex = x * 4;
                    unsigned char alpha = srcRows[basex + 3];
                    if (alpha) {
                        destRows[basex] = (srcRows[basex] * 255) / alpha;
                        destRows[basex + 1] = (srcRows[basex + 1] * 255) / alpha;
                        destRows[basex + 2] = (srcRows[basex + 2] * 255) / alpha;
                        destRows[basex + 3] = alpha;
                    } else
                        reinterpret_cast<uint32_t*>(destRows + basex)[0] = reinterpret_cast<uint32_t*>(srcRows + basex)[0];
                }
                srcRows += srcBytesPerRow;
                destRows += destBytesPerRow;
            }
        } else {
            for (int y = 0; y < height; ++y) {
                for (int x = 0; x < width * 4; x += 4)
                    reinterpret_cast<uint32_t*>(destRows + x)[0] = reinterpret_cast<uint32_t*>(srcRows + x)[0];
                srcRows += srcBytesPerRow;
                destRows += destBytesPerRow;
            }
        }
    } else {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
        IOSurfaceRef surface = m_surface.get();
        IOSurfaceLock(surface, kIOSurfaceLockReadOnly, 0);
        srcBytesPerRow = IOSurfaceGetBytesPerRow(surface);
        srcRows = (unsigned char*)(IOSurfaceGetBaseAddress(surface)) + originy * srcBytesPerRow + originx * 4;

#if USE(ACCELERATE)
        vImage_Buffer src;
        src.height = height;
        src.width = width;
        src.rowBytes = srcBytesPerRow;
        src.data = srcRows;

        vImage_Buffer dest;
        dest.height = desth;
        dest.width = destw;
        dest.rowBytes = destBytesPerRow;
        dest.data = destRows;

        if (resolutionScale != 1) {
            vImage_AffineTransform scaleTransform = { 1 / resolutionScale, 0, 0, 1 / resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
            Pixel_8888 backgroundColor;
            vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
            // The unpremultiplying and channel-swapping will be done in-place.
            if (unmultiplied) {
                srcRows = destRows;
                width = destw;
                height = desth;
                srcBytesPerRow = destBytesPerRow;
            } else
                src = dest;
        }

        if (unmultiplied) {
            ScanlineData scanlineData;
            scanlineData.scanlineWidth = width;
            scanlineData.srcData = srcRows;
            scanlineData.srcRowBytes = srcBytesPerRow;
            scanlineData.destData = destRows;
            scanlineData.destRowBytes = destBytesPerRow;

            dispatch_apply_f(height, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, unpremultitplyScanline);
        } else {
            // Swap pixel channels from BGRA to RGBA.
            const uint8_t map[4] = { 2, 1, 0, 3 };
            vImagePermuteChannels_ARGB8888(&src, &dest, map, kvImageNoFlags);
        }
#else
        if (resolutionScale != 1) {
            RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
            RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
            CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
            CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.

            srcRows = destRows;
            srcBytesPerRow = destBytesPerRow;
            width = destw;
            height = desth;
        }

        if (unmultiplied) {
            for (int y = 0; y < height; ++y) {
                for (int x = 0; x < width; x++) {
                    int basex = x * 4;
                    unsigned char b = srcRows[basex];
                    unsigned char alpha = srcRows[basex + 3];
                    if (alpha) {
                        destRows[basex] = (srcRows[basex + 2] * 255) / alpha;
                        destRows[basex + 1] = (srcRows[basex + 1] * 255) / alpha;
                        destRows[basex + 2] = (b * 255) / alpha;
                        destRows[basex + 3] = alpha;
                    } else {
                        destRows[basex] = srcRows[basex + 2];
                        destRows[basex + 1] = srcRows[basex + 1];
                        destRows[basex + 2] = b;
                        destRows[basex + 3] = srcRows[basex + 3];
                    }
                }
                srcRows += srcBytesPerRow;
                destRows += destBytesPerRow;
            }
        } else {
            for (int y = 0; y < height; ++y) {
                for (int x = 0; x < width; x++) {
                    int basex = x * 4;
                    unsigned char b = srcRows[basex];
                    destRows[basex] = srcRows[basex + 2];
                    destRows[basex + 1] = srcRows[basex + 1];
                    destRows[basex + 2] = b;
                    destRows[basex + 3] = srcRows[basex + 3];
                }
                srcRows += srcBytesPerRow;
                destRows += destBytesPerRow;
            }
        }
#endif // USE(ACCELERATE)
        IOSurfaceUnlock(surface, kIOSurfaceLockReadOnly, 0);
#else
        ASSERT_NOT_REACHED();
#endif // USE(IOSURFACE_CANVAS_BACKING_STORE)
    }
    
    return result.release();
}