ImageBufferDataCG.cpp [plain text]
#include "config.h"
#include "ImageBufferData.h"
#include <CoreGraphics/CoreGraphics.h>
#include <wtf/Assertions.h>
#if USE(ACCELERATE)
#include <Accelerate/Accelerate.h>
#endif
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
#include <IOSurface/IOSurface.h>
#include <dispatch/dispatch.h>
#endif
using namespace std;
#if USE(ACCELERATE)
struct ScanlineData {
vImagePixelCount scanlineWidth;
unsigned char* srcData;
size_t srcRowBytes;
unsigned char* destData;
size_t destRowBytes;
};
#endif
namespace WebCore {
ImageBufferData::ImageBufferData(const IntSize&)
: m_data(0)
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
, m_surface(0)
#endif
{
}
#if USE(ACCELERATE)
#ifndef TARGETING_SNOW_LEOPARD
static bool haveVImageRoundingErrorFix() { return true; }
#else
static bool haveVImageRoundingErrorFix()
{
SInt32 version;
static bool result = (Gestalt(gestaltSystemVersion, &version) == noErr && version > 0x1066);
return result;
}
#endif // TARGETING_SNOW_LEOPARD
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
static void convertScanline(void* data, size_t tileNumber, bool premultiply)
{
ScanlineData* scanlineData = static_cast<ScanlineData*>(data);
vImage_Buffer src;
src.data = scanlineData->srcData + tileNumber * scanlineData->srcRowBytes;
src.height = 1;
src.width = scanlineData->scanlineWidth;
src.rowBytes = scanlineData->srcRowBytes;
vImage_Buffer dest;
dest.data = scanlineData->destData + tileNumber * scanlineData->destRowBytes;
dest.height = 1;
dest.width = scanlineData->scanlineWidth;
dest.rowBytes = scanlineData->destRowBytes;
if (premultiply) {
if (kvImageNoError != vImagePremultiplyData_RGBA8888(&src, &dest, kvImageDoNotTile))
return;
} else {
if (kvImageNoError != vImageUnpremultiplyData_RGBA8888(&src, &dest, kvImageDoNotTile))
return;
}
const uint8_t map[4] = { 2, 1, 0, 3 };
vImagePermuteChannels_ARGB8888(&dest, &dest, map, kvImageDoNotTile);
}
static void unpremultitplyScanline(void* data, size_t tileNumber)
{
convertScanline(data, tileNumber, false);
}
static void premultitplyScanline(void* data, size_t tileNumber)
{
convertScanline(data, tileNumber, true);
}
#endif // USE(IOSURFACE_CANVAS_BACKING_STORE)
#endif // USE(ACCELERATE)
PassRefPtr<Uint8ClampedArray> ImageBufferData::getData(const IntRect& rect, const IntSize& size, bool accelerateRendering, bool unmultiplied, float resolutionScale) const
{
Checked<unsigned, RecordOverflow> area = 4;
area *= rect.width();
area *= rect.height();
if (area.hasOverflowed())
return 0;
RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(area.unsafeGet());
unsigned char* data = result->data();
Checked<int> endx = rect.maxX();
endx *= ceilf(resolutionScale);
Checked<int> endy = rect.maxY();
endy *= resolutionScale;
if (rect.x() < 0 || rect.y() < 0 || endx.unsafeGet() > size.width() || endy.unsafeGet() > 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.unsafeGet() > size.width())
endx = size.width();
Checked<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.unsafeGet() > size.height())
endy = size.height();
Checked<int> height = endy - originy;
if (width.unsafeGet() <= 0 || height.unsafeGet() <= 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.unsafeGet();
src.width = width.unsafeGet();
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 }; Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
src = dst;
}
vImageUnpremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
return result.release();
}
#endif
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width.unsafeGet(), height.unsafeGet(), 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.unsafeGet() / resolutionScale, height.unsafeGet() / resolutionScale), sourceImage.get()); if (!unmultiplied)
return result.release();
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
if (unmultiplied) {
if ((width * 4).hasOverflowed())
CRASH();
for (int y = 0; y < height.unsafeGet(); ++y) {
for (int x = 0; x < width.unsafeGet(); 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.unsafeGet(); ++y) {
for (int x = 0; x < (width * 4).unsafeGet(); 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.unsafeGet();
src.width = width.unsafeGet();
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 }; Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
if (unmultiplied) {
srcRows = destRows;
width = destw;
height = desth;
srcBytesPerRow = destBytesPerRow;
} else
src = dest;
}
if (unmultiplied) {
ScanlineData scanlineData;
scanlineData.scanlineWidth = width.unsafeGet();
scanlineData.srcData = srcRows;
scanlineData.srcRowBytes = srcBytesPerRow;
scanlineData.destData = destRows;
scanlineData.destRowBytes = destBytesPerRow;
dispatch_apply_f(height.unsafeGet(), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, unpremultitplyScanline);
} else {
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.unsafeGet(), height.unsafeGet(), 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.unsafeGet() / resolutionScale, height.unsafeGet() / resolutionScale), sourceImage.get());
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
if ((width * 4).hasOverflowed())
CRASH();
if (unmultiplied) {
for (int y = 0; y < height.unsafeGet(); ++y) {
for (int x = 0; x < width.unsafeGet(); 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.unsafeGet(); ++y) {
for (int x = 0; x < width.unsafeGet(); 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();
}
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);
Checked<int> originx = sourceRect.x();
Checked<int> destx = (Checked<int>(destPoint.x()) + sourceRect.x());
destx *= resolutionScale;
ASSERT(destx.unsafeGet() >= 0);
ASSERT(destx.unsafeGet() < size.width());
ASSERT(originx.unsafeGet() >= 0);
ASSERT(originx.unsafeGet() <= sourceRect.maxX());
Checked<int> endx = (Checked<int>(destPoint.x()) + sourceRect.maxX());
endx *= resolutionScale;
ASSERT(endx.unsafeGet() <= size.width());
Checked<int> width = sourceRect.width();
Checked<int> destw = endx - destx;
Checked<int> originy = sourceRect.y();
Checked<int> desty = (Checked<int>(destPoint.y()) + sourceRect.y());
desty *= resolutionScale;
ASSERT(desty.unsafeGet() >= 0);
ASSERT(desty.unsafeGet() < size.height());
ASSERT(originy.unsafeGet() >= 0);
ASSERT(originy.unsafeGet() <= sourceRect.maxY());
Checked<int> endy = (Checked<int>(destPoint.y()) + sourceRect.maxY());
endy *= resolutionScale;
ASSERT(endy.unsafeGet() <= size.height());
Checked<int> height = sourceRect.height();
Checked<int> desth = endy - desty;
if (width <= 0 || height <= 0)
return;
unsigned srcBytesPerRow = 4 * sourceSize.width();
unsigned char* srcRows = source->data() + (originy * srcBytesPerRow + originx * 4).unsafeGet();
unsigned destBytesPerRow;
unsigned char* destRows;
if (!accelerateRendering) {
destBytesPerRow = 4 * size.width();
destRows = reinterpret_cast<unsigned char*>(m_data) + (desty * destBytesPerRow + destx * 4).unsafeGet();
#if USE(ACCELERATE)
if (haveVImageRoundingErrorFix() && unmultiplied) {
vImage_Buffer src;
src.height = height.unsafeGet();
src.width = width.unsafeGet();
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dst;
dst.height = desth.unsafeGet();
dst.width = destw.unsafeGet();
dst.rowBytes = destBytesPerRow;
dst.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
src = dst;
}
vImagePremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
return;
}
#endif
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width.unsafeGet(), height.unsafeGet(), 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw.unsafeGet(), desth.unsafeGet(), 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width.unsafeGet() / resolutionScale, height.unsafeGet() / resolutionScale), sourceImage.get()); if (!unmultiplied)
return;
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
for (int y = 0; y < height.unsafeGet(); ++y) {
for (int x = 0; x < width.unsafeGet(); 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).unsafeGet();
#if USE(ACCELERATE)
vImage_Buffer src;
src.height = height.unsafeGet();
src.width = width.unsafeGet();
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dest;
dest.height = desth.unsafeGet();
dest.width = destw.unsafeGet();
dest.rowBytes = destBytesPerRow;
dest.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
if (unmultiplied) {
srcRows = destRows;
width = destw;
height = desth;
srcBytesPerRow = destBytesPerRow;
} else
src = dest;
}
if (unmultiplied) {
ScanlineData scanlineData;
scanlineData.scanlineWidth = width.unsafeGet();
scanlineData.srcData = srcRows;
scanlineData.srcRowBytes = srcBytesPerRow;
scanlineData.destData = destRows;
scanlineData.destRowBytes = destBytesPerRow;
dispatch_apply_f(height.unsafeGet(), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, premultitplyScanline);
} else {
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.unsafeGet(), height.unsafeGet(), 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw.unsafeGet(), desth.unsafeGet(), 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width.unsafeGet() / resolutionScale, height.unsafeGet() / resolutionScale), sourceImage.get());
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
for (int y = 0; y < height.unsafeGet(); ++y) {
for (int x = 0; x < width.unsafeGet(); 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)
}
}
}