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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gfxUtils.h"
+
+#include "cairo.h"
+#include "gfxContext.h"
+#include "gfxEnv.h"
+#include "gfxImageSurface.h"
+#include "gfxPlatform.h"
+#include "gfxDrawable.h"
+#include "imgIEncoder.h"
+#include "libyuv.h"
+#include "mozilla/Base64.h"
+#include "mozilla/dom/ImageEncoder.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/WorkerRunnable.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/DataSurfaceHelpers.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "mozilla/Vector.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIClipboardHelper.h"
+#include "nsIFile.h"
+#include "nsIGfxInfo.h"
+#include "nsIPresShell.h"
+#include "nsPresContext.h"
+#include "nsRegion.h"
+#include "nsServiceManagerUtils.h"
+#include "GeckoProfiler.h"
+#include "ImageContainer.h"
+#include "ImageRegion.h"
+#include "gfx2DGlue.h"
+#include "gfxPrefs.h"
+
+#ifdef XP_WIN
+#include "gfxWindowsPlatform.h"
+#endif
+
+using namespace mozilla;
+using namespace mozilla::image;
+using namespace mozilla::layers;
+using namespace mozilla::gfx;
+
+#include "DeprecatedPremultiplyTables.h"
+
+#undef compress
+#include "mozilla/Compression.h"
+
+using namespace mozilla::Compression;
+extern "C" {
+
+/**
+ * Dump a raw image to the default log. This function is exported
+ * from libxul, so it can be called from any library in addition to
+ * (of course) from a debugger.
+ *
+ * Note: this helper currently assumes that all 2-bytepp images are
+ * r5g6b5, and that all 4-bytepp images are r8g8b8a8.
+ */
+NS_EXPORT
+void mozilla_dump_image(void* bytes, int width, int height, int bytepp,
+ int strideBytes)
+{
+ if (0 == strideBytes) {
+ strideBytes = width * bytepp;
+ }
+ SurfaceFormat format;
+ // TODO more flexible; parse string?
+ switch (bytepp) {
+ case 2:
+ format = SurfaceFormat::R5G6B5_UINT16;
+ break;
+ case 4:
+ default:
+ format = SurfaceFormat::R8G8B8A8;
+ break;
+ }
+
+ RefPtr<DataSourceSurface> surf =
+ Factory::CreateWrappingDataSourceSurface((uint8_t*)bytes, strideBytes,
+ IntSize(width, height),
+ format);
+ gfxUtils::DumpAsDataURI(surf);
+}
+
+}
+
+static uint8_t PremultiplyValue(uint8_t a, uint8_t v) {
+ return gfxUtils::sPremultiplyTable[a*256+v];
+}
+
+static uint8_t UnpremultiplyValue(uint8_t a, uint8_t v) {
+ return gfxUtils::sUnpremultiplyTable[a*256+v];
+}
+
+static void
+PremultiplyData(const uint8_t* srcData,
+ size_t srcStride, // row-to-row stride in bytes
+ uint8_t* destData,
+ size_t destStride, // row-to-row stride in bytes
+ size_t pixelWidth,
+ size_t rowCount)
+{
+ MOZ_ASSERT(srcData && destData);
+
+ for (size_t y = 0; y < rowCount; ++y) {
+ const uint8_t* src = srcData + y * srcStride;
+ uint8_t* dest = destData + y * destStride;
+
+ for (size_t x = 0; x < pixelWidth; ++x) {
+#ifdef IS_LITTLE_ENDIAN
+ uint8_t b = *src++;
+ uint8_t g = *src++;
+ uint8_t r = *src++;
+ uint8_t a = *src++;
+
+ *dest++ = PremultiplyValue(a, b);
+ *dest++ = PremultiplyValue(a, g);
+ *dest++ = PremultiplyValue(a, r);
+ *dest++ = a;
+#else
+ uint8_t a = *src++;
+ uint8_t r = *src++;
+ uint8_t g = *src++;
+ uint8_t b = *src++;
+
+ *dest++ = a;
+ *dest++ = PremultiplyValue(a, r);
+ *dest++ = PremultiplyValue(a, g);
+ *dest++ = PremultiplyValue(a, b);
+#endif
+ }
+ }
+}
+static void
+UnpremultiplyData(const uint8_t* srcData,
+ size_t srcStride, // row-to-row stride in bytes
+ uint8_t* destData,
+ size_t destStride, // row-to-row stride in bytes
+ size_t pixelWidth,
+ size_t rowCount)
+{
+ MOZ_ASSERT(srcData && destData);
+
+ for (size_t y = 0; y < rowCount; ++y) {
+ const uint8_t* src = srcData + y * srcStride;
+ uint8_t* dest = destData + y * destStride;
+
+ for (size_t x = 0; x < pixelWidth; ++x) {
+#ifdef IS_LITTLE_ENDIAN
+ uint8_t b = *src++;
+ uint8_t g = *src++;
+ uint8_t r = *src++;
+ uint8_t a = *src++;
+
+ *dest++ = UnpremultiplyValue(a, b);
+ *dest++ = UnpremultiplyValue(a, g);
+ *dest++ = UnpremultiplyValue(a, r);
+ *dest++ = a;
+#else
+ uint8_t a = *src++;
+ uint8_t r = *src++;
+ uint8_t g = *src++;
+ uint8_t b = *src++;
+
+ *dest++ = a;
+ *dest++ = UnpremultiplyValue(a, r);
+ *dest++ = UnpremultiplyValue(a, g);
+ *dest++ = UnpremultiplyValue(a, b);
+#endif
+ }
+ }
+}
+
+static bool
+MapSrcDest(DataSourceSurface* srcSurf,
+ DataSourceSurface* destSurf,
+ DataSourceSurface::MappedSurface* out_srcMap,
+ DataSourceSurface::MappedSurface* out_destMap)
+{
+ MOZ_ASSERT(srcSurf && destSurf);
+ MOZ_ASSERT(out_srcMap && out_destMap);
+
+ if (srcSurf->GetFormat() != SurfaceFormat::B8G8R8A8 ||
+ destSurf->GetFormat() != SurfaceFormat::B8G8R8A8)
+ {
+ MOZ_ASSERT(false, "Only operate on BGRA8 surfs.");
+ return false;
+ }
+
+ if (srcSurf->GetSize().width != destSurf->GetSize().width ||
+ srcSurf->GetSize().height != destSurf->GetSize().height)
+ {
+ MOZ_ASSERT(false, "Width and height must match.");
+ return false;
+ }
+
+ if (srcSurf == destSurf) {
+ DataSourceSurface::MappedSurface map;
+ if (!srcSurf->Map(DataSourceSurface::MapType::READ_WRITE, &map)) {
+ NS_WARNING("Couldn't Map srcSurf/destSurf.");
+ return false;
+ }
+
+ *out_srcMap = map;
+ *out_destMap = map;
+ return true;
+ }
+
+ // Map src for reading.
+ DataSourceSurface::MappedSurface srcMap;
+ if (!srcSurf->Map(DataSourceSurface::MapType::READ, &srcMap)) {
+ NS_WARNING("Couldn't Map srcSurf.");
+ return false;
+ }
+
+ // Map dest for writing.
+ DataSourceSurface::MappedSurface destMap;
+ if (!destSurf->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
+ NS_WARNING("Couldn't Map aDest.");
+ srcSurf->Unmap();
+ return false;
+ }
+
+ *out_srcMap = srcMap;
+ *out_destMap = destMap;
+ return true;
+}
+
+static void
+UnmapSrcDest(DataSourceSurface* srcSurf,
+ DataSourceSurface* destSurf)
+{
+ if (srcSurf == destSurf) {
+ srcSurf->Unmap();
+ } else {
+ srcSurf->Unmap();
+ destSurf->Unmap();
+ }
+}
+
+bool
+gfxUtils::PremultiplyDataSurface(DataSourceSurface* srcSurf,
+ DataSourceSurface* destSurf)
+{
+ MOZ_ASSERT(srcSurf && destSurf);
+
+ DataSourceSurface::MappedSurface srcMap;
+ DataSourceSurface::MappedSurface destMap;
+ if (!MapSrcDest(srcSurf, destSurf, &srcMap, &destMap))
+ return false;
+
+ PremultiplyData(srcMap.mData, srcMap.mStride,
+ destMap.mData, destMap.mStride,
+ srcSurf->GetSize().width,
+ srcSurf->GetSize().height);
+
+ UnmapSrcDest(srcSurf, destSurf);
+ return true;
+}
+
+bool
+gfxUtils::UnpremultiplyDataSurface(DataSourceSurface* srcSurf,
+ DataSourceSurface* destSurf)
+{
+ MOZ_ASSERT(srcSurf && destSurf);
+
+ DataSourceSurface::MappedSurface srcMap;
+ DataSourceSurface::MappedSurface destMap;
+ if (!MapSrcDest(srcSurf, destSurf, &srcMap, &destMap))
+ return false;
+
+ UnpremultiplyData(srcMap.mData, srcMap.mStride,
+ destMap.mData, destMap.mStride,
+ srcSurf->GetSize().width,
+ srcSurf->GetSize().height);
+
+ UnmapSrcDest(srcSurf, destSurf);
+ return true;
+}
+
+static bool
+MapSrcAndCreateMappedDest(DataSourceSurface* srcSurf,
+ RefPtr<DataSourceSurface>* out_destSurf,
+ DataSourceSurface::MappedSurface* out_srcMap,
+ DataSourceSurface::MappedSurface* out_destMap)
+{
+ MOZ_ASSERT(srcSurf);
+ MOZ_ASSERT(out_destSurf && out_srcMap && out_destMap);
+
+ if (srcSurf->GetFormat() != SurfaceFormat::B8G8R8A8) {
+ MOZ_ASSERT(false, "Only operate on BGRA8.");
+ return false;
+ }
+
+ // Ok, map source for reading.
+ DataSourceSurface::MappedSurface srcMap;
+ if (!srcSurf->Map(DataSourceSurface::MapType::READ, &srcMap)) {
+ MOZ_ASSERT(false, "Couldn't Map srcSurf.");
+ return false;
+ }
+
+ // Make our dest surface based on the src.
+ RefPtr<DataSourceSurface> destSurf =
+ Factory::CreateDataSourceSurfaceWithStride(srcSurf->GetSize(),
+ srcSurf->GetFormat(),
+ srcMap.mStride);
+ if (NS_WARN_IF(!destSurf)) {
+ return false;
+ }
+
+ DataSourceSurface::MappedSurface destMap;
+ if (!destSurf->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
+ MOZ_ASSERT(false, "Couldn't Map destSurf.");
+ srcSurf->Unmap();
+ return false;
+ }
+
+ *out_destSurf = destSurf;
+ *out_srcMap = srcMap;
+ *out_destMap = destMap;
+ return true;
+}
+
+already_AddRefed<DataSourceSurface>
+gfxUtils::CreatePremultipliedDataSurface(DataSourceSurface* srcSurf)
+{
+ RefPtr<DataSourceSurface> destSurf;
+ DataSourceSurface::MappedSurface srcMap;
+ DataSourceSurface::MappedSurface destMap;
+ if (!MapSrcAndCreateMappedDest(srcSurf, &destSurf, &srcMap, &destMap)) {
+ MOZ_ASSERT(false, "MapSrcAndCreateMappedDest failed.");
+ RefPtr<DataSourceSurface> surface(srcSurf);
+ return surface.forget();
+ }
+
+ PremultiplyData(srcMap.mData, srcMap.mStride,
+ destMap.mData, destMap.mStride,
+ srcSurf->GetSize().width,
+ srcSurf->GetSize().height);
+
+ UnmapSrcDest(srcSurf, destSurf);
+ return destSurf.forget();
+}
+
+already_AddRefed<DataSourceSurface>
+gfxUtils::CreateUnpremultipliedDataSurface(DataSourceSurface* srcSurf)
+{
+ RefPtr<DataSourceSurface> destSurf;
+ DataSourceSurface::MappedSurface srcMap;
+ DataSourceSurface::MappedSurface destMap;
+ if (!MapSrcAndCreateMappedDest(srcSurf, &destSurf, &srcMap, &destMap)) {
+ MOZ_ASSERT(false, "MapSrcAndCreateMappedDest failed.");
+ RefPtr<DataSourceSurface> surface(srcSurf);
+ return surface.forget();
+ }
+
+ UnpremultiplyData(srcMap.mData, srcMap.mStride,
+ destMap.mData, destMap.mStride,
+ srcSurf->GetSize().width,
+ srcSurf->GetSize().height);
+
+ UnmapSrcDest(srcSurf, destSurf);
+ return destSurf.forget();
+}
+
+void
+gfxUtils::ConvertBGRAtoRGBA(uint8_t* aData, uint32_t aLength)
+{
+ MOZ_ASSERT((aLength % 4) == 0, "Loop below will pass srcEnd!");
+ libyuv::ABGRToARGB(aData, aLength, aData, aLength, aLength / 4, 1);
+}
+
+#if !defined(MOZ_GFX_OPTIMIZE_MOBILE)
+/**
+ * This returns the fastest operator to use for solid surfaces which have no
+ * alpha channel or their alpha channel is uniformly opaque.
+ * This differs per render mode.
+ */
+static CompositionOp
+OptimalFillOp()
+{
+#ifdef XP_WIN
+ if (gfxWindowsPlatform::GetPlatform()->IsDirect2DBackend()) {
+ // D2D -really- hates operator source.
+ return CompositionOp::OP_OVER;
+ }
+#endif
+ return CompositionOp::OP_SOURCE;
+}
+
+// EXTEND_PAD won't help us here; we have to create a temporary surface to hold
+// the subimage of pixels we're allowed to sample.
+static already_AddRefed<gfxDrawable>
+CreateSamplingRestrictedDrawable(gfxDrawable* aDrawable,
+ gfxContext* aContext,
+ const ImageRegion& aRegion,
+ const SurfaceFormat aFormat)
+{
+ PROFILER_LABEL("gfxUtils", "CreateSamplingRestricedDrawable",
+ js::ProfileEntry::Category::GRAPHICS);
+
+ DrawTarget* destDrawTarget = aContext->GetDrawTarget();
+ if (destDrawTarget->GetBackendType() == BackendType::DIRECT2D1_1) {
+ return nullptr;
+ }
+
+ gfxRect clipExtents = aContext->GetClipExtents();
+
+ // Inflate by one pixel because bilinear filtering will sample at most
+ // one pixel beyond the computed image pixel coordinate.
+ clipExtents.Inflate(1.0);
+
+ gfxRect needed = aRegion.IntersectAndRestrict(clipExtents);
+ needed.RoundOut();
+
+ // if 'needed' is empty, nothing will be drawn since aFill
+ // must be entirely outside the clip region, so it doesn't
+ // matter what we do here, but we should avoid trying to
+ // create a zero-size surface.
+ if (needed.IsEmpty())
+ return nullptr;
+
+ IntSize size(int32_t(needed.Width()), int32_t(needed.Height()));
+
+ RefPtr<DrawTarget> target =
+ gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(size, aFormat);
+ if (!target || !target->IsValid()) {
+ return nullptr;
+ }
+
+ RefPtr<gfxContext> tmpCtx = gfxContext::CreateOrNull(target);
+ MOZ_ASSERT(tmpCtx); // already checked the target above
+
+ tmpCtx->SetOp(OptimalFillOp());
+ aDrawable->Draw(tmpCtx, needed - needed.TopLeft(), ExtendMode::REPEAT,
+ SamplingFilter::LINEAR,
+ 1.0, gfxMatrix::Translation(needed.TopLeft()));
+ RefPtr<SourceSurface> surface = target->Snapshot();
+
+ RefPtr<gfxDrawable> drawable = new gfxSurfaceDrawable(surface, size, gfxMatrix::Translation(-needed.TopLeft()));
+ return drawable.forget();
+}
+#endif // !MOZ_GFX_OPTIMIZE_MOBILE
+
+/* These heuristics are based on Source/WebCore/platform/graphics/skia/ImageSkia.cpp:computeResamplingMode() */
+#ifdef MOZ_GFX_OPTIMIZE_MOBILE
+static SamplingFilter ReduceResamplingFilter(SamplingFilter aSamplingFilter,
+ int aImgWidth, int aImgHeight,
+ float aSourceWidth, float aSourceHeight)
+{
+ // Images smaller than this in either direction are considered "small" and
+ // are not resampled ever (see below).
+ const int kSmallImageSizeThreshold = 8;
+
+ // The amount an image can be stretched in a single direction before we
+ // say that it is being stretched so much that it must be a line or
+ // background that doesn't need resampling.
+ const float kLargeStretch = 3.0f;
+
+ if (aImgWidth <= kSmallImageSizeThreshold
+ || aImgHeight <= kSmallImageSizeThreshold) {
+ // Never resample small images. These are often used for borders and
+ // rules (think 1x1 images used to make lines).
+ return SamplingFilter::POINT;
+ }
+
+ if (aImgHeight * kLargeStretch <= aSourceHeight || aImgWidth * kLargeStretch <= aSourceWidth) {
+ // Large image tiling detected.
+
+ // Don't resample if it is being tiled a lot in only one direction.
+ // This is trying to catch cases where somebody has created a border
+ // (which might be large) and then is stretching it to fill some part
+ // of the page.
+ if (fabs(aSourceWidth - aImgWidth)/aImgWidth < 0.5 || fabs(aSourceHeight - aImgHeight)/aImgHeight < 0.5)
+ return SamplingFilter::POINT;
+
+ // The image is growing a lot and in more than one direction. Resampling
+ // is slow and doesn't give us very much when growing a lot.
+ return aSamplingFilter;
+ }
+
+ /* Some notes on other heuristics:
+ The Skia backend also uses nearest for backgrounds that are stretched by
+ a large amount. I'm not sure this is common enough for us to worry about
+ now. It also uses nearest for backgrounds/avoids high quality for images
+ that are very slightly scaled. I'm also not sure that very slightly
+ scaled backgrounds are common enough us to worry about.
+
+ We don't currently have much support for doing high quality interpolation.
+ The only place this currently happens is on Quartz and we don't have as
+ much control over it as would be needed. Webkit avoids using high quality
+ resampling during load. It also avoids high quality if the transformation
+ is not just a scale and translation
+
+ WebKit bug #40045 added code to avoid resampling different parts
+ of an image with different methods by using a resampling hint size.
+ It currently looks unused in WebKit but it's something to watch out for.
+ */
+
+ return aSamplingFilter;
+}
+#else
+static SamplingFilter ReduceResamplingFilter(SamplingFilter aSamplingFilter,
+ int aImgWidth, int aImgHeight,
+ int aSourceWidth, int aSourceHeight)
+{
+ // Just pass the filter through unchanged
+ return aSamplingFilter;
+}
+#endif
+
+#ifdef MOZ_WIDGET_COCOA
+// Only prescale a temporary surface if we're going to repeat it often.
+// Scaling is expensive on OS X and without prescaling, we'd scale
+// every tile of the repeated rect. However, using a temp surface also potentially uses
+// more memory if the scaled image is large. So only prescale on a temp
+// surface if we know we're going to repeat the image in either the X or Y axis
+// multiple times.
+static bool
+ShouldUseTempSurface(Rect aImageRect, Rect aNeededRect)
+{
+ int repeatX = aNeededRect.width / aImageRect.width;
+ int repeatY = aNeededRect.height / aImageRect.height;
+ return (repeatX >= 5) || (repeatY >= 5);
+}
+
+static bool
+PrescaleAndTileDrawable(gfxDrawable* aDrawable,
+ gfxContext* aContext,
+ const ImageRegion& aRegion,
+ Rect aImageRect,
+ const SamplingFilter aSamplingFilter,
+ const SurfaceFormat aFormat,
+ gfxFloat aOpacity,
+ ExtendMode aExtendMode)
+{
+ gfxSize scaleFactor = aContext->CurrentMatrix().ScaleFactors(true);
+ gfxMatrix scaleMatrix = gfxMatrix::Scaling(scaleFactor.width, scaleFactor.height);
+ const float fuzzFactor = 0.01;
+
+ // If we aren't scaling or translating, don't go down this path
+ if ((FuzzyEqual(scaleFactor.width, 1.0, fuzzFactor) &&
+ FuzzyEqual(scaleFactor.width, 1.0, fuzzFactor)) ||
+ aContext->CurrentMatrix().HasNonAxisAlignedTransform()) {
+ return false;
+ }
+
+ gfxRect clipExtents = aContext->GetClipExtents();
+
+ // Inflate by one pixel because bilinear filtering will sample at most
+ // one pixel beyond the computed image pixel coordinate.
+ clipExtents.Inflate(1.0);
+
+ gfxRect needed = aRegion.IntersectAndRestrict(clipExtents);
+ Rect scaledNeededRect = ToMatrix(scaleMatrix).TransformBounds(ToRect(needed));
+ scaledNeededRect.RoundOut();
+ if (scaledNeededRect.IsEmpty()) {
+ return false;
+ }
+
+ Rect scaledImageRect = ToMatrix(scaleMatrix).TransformBounds(aImageRect);
+ if (!ShouldUseTempSurface(scaledImageRect, scaledNeededRect)) {
+ return false;
+ }
+
+ IntSize scaledImageSize((int32_t)scaledImageRect.width,
+ (int32_t)scaledImageRect.height);
+ if (scaledImageSize.width != scaledImageRect.width ||
+ scaledImageSize.height != scaledImageRect.height) {
+ // If the scaled image isn't pixel aligned, we'll get artifacts
+ // so we have to take the slow path.
+ return false;
+ }
+
+ RefPtr<DrawTarget> scaledDT =
+ gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(scaledImageSize, aFormat);
+ if (!scaledDT || !scaledDT->IsValid()) {
+ return false;
+ }
+
+ RefPtr<gfxContext> tmpCtx = gfxContext::CreateOrNull(scaledDT);
+ MOZ_ASSERT(tmpCtx); // already checked the target above
+
+ scaledDT->SetTransform(ToMatrix(scaleMatrix));
+ gfxRect gfxImageRect(aImageRect.x, aImageRect.y, aImageRect.width, aImageRect.height);
+
+ // Since this is just the scaled image, we don't want to repeat anything yet.
+ aDrawable->Draw(tmpCtx, gfxImageRect, ExtendMode::CLAMP, aSamplingFilter, 1.0, gfxMatrix());
+
+ RefPtr<SourceSurface> scaledImage = scaledDT->Snapshot();
+
+ {
+ gfxContextMatrixAutoSaveRestore autoSR(aContext);
+ Matrix withoutScale = ToMatrix(aContext->CurrentMatrix());
+ DrawTarget* destDrawTarget = aContext->GetDrawTarget();
+
+ // The translation still is in scaled units
+ withoutScale.PreScale(1.0 / scaleFactor.width, 1.0 / scaleFactor.height);
+ aContext->SetMatrix(ThebesMatrix(withoutScale));
+
+ DrawOptions drawOptions(aOpacity, aContext->CurrentOp(),
+ aContext->CurrentAntialiasMode());
+
+ SurfacePattern scaledImagePattern(scaledImage, aExtendMode,
+ Matrix(), aSamplingFilter);
+ destDrawTarget->FillRect(scaledNeededRect, scaledImagePattern, drawOptions);
+ }
+ return true;
+}
+#endif // MOZ_WIDGET_COCOA
+
+/* static */ void
+gfxUtils::DrawPixelSnapped(gfxContext* aContext,
+ gfxDrawable* aDrawable,
+ const gfxSize& aImageSize,
+ const ImageRegion& aRegion,
+ const SurfaceFormat aFormat,
+ SamplingFilter aSamplingFilter,
+ uint32_t aImageFlags,
+ gfxFloat aOpacity)
+{
+ PROFILER_LABEL("gfxUtils", "DrawPixelSnapped",
+ js::ProfileEntry::Category::GRAPHICS);
+
+ gfxRect imageRect(gfxPoint(0, 0), aImageSize);
+ gfxRect region(aRegion.Rect());
+ ExtendMode extendMode = aRegion.GetExtendMode();
+
+ RefPtr<gfxDrawable> drawable = aDrawable;
+
+ aSamplingFilter =
+ ReduceResamplingFilter(aSamplingFilter,
+ imageRect.Width(), imageRect.Height(),
+ region.Width(), region.Height());
+
+ // OK now, the hard part left is to account for the subimage sampling
+ // restriction. If all the transforms involved are just integer
+ // translations, then we assume no resampling will occur so there's
+ // nothing to do.
+ // XXX if only we had source-clipping in cairo!
+
+ if (aContext->CurrentMatrix().HasNonIntegerTranslation()) {
+ if ((extendMode != ExtendMode::CLAMP) || !aRegion.RestrictionContains(imageRect)) {
+ if (drawable->DrawWithSamplingRect(aContext->GetDrawTarget(),
+ aContext->CurrentOp(),
+ aContext->CurrentAntialiasMode(),
+ aRegion.Rect(),
+ aRegion.Restriction(),
+ extendMode, aSamplingFilter,
+ aOpacity)) {
+ return;
+ }
+
+#ifdef MOZ_WIDGET_COCOA
+ if (PrescaleAndTileDrawable(aDrawable, aContext, aRegion,
+ ToRect(imageRect), aSamplingFilter,
+ aFormat, aOpacity, extendMode)) {
+ return;
+ }
+#endif
+
+ // On Mobile, we don't ever want to do this; it has the potential for
+ // allocating very large temporary surfaces, especially since we'll
+ // do full-page snapshots often (see bug 749426).
+#if !defined(MOZ_GFX_OPTIMIZE_MOBILE)
+ RefPtr<gfxDrawable> restrictedDrawable =
+ CreateSamplingRestrictedDrawable(aDrawable, aContext,
+ aRegion, aFormat);
+ if (restrictedDrawable) {
+ drawable.swap(restrictedDrawable);
+
+ // We no longer need to tile: Either we never needed to, or we already
+ // filled a surface with the tiled pattern; this surface can now be
+ // drawn without tiling.
+ extendMode = ExtendMode::CLAMP;
+ }
+#endif
+ }
+ }
+
+ drawable->Draw(aContext, aRegion.Rect(), extendMode, aSamplingFilter,
+ aOpacity, gfxMatrix());
+}
+
+/* static */ int
+gfxUtils::ImageFormatToDepth(gfxImageFormat aFormat)
+{
+ switch (aFormat) {
+ case SurfaceFormat::A8R8G8B8_UINT32:
+ return 32;
+ case SurfaceFormat::X8R8G8B8_UINT32:
+ return 24;
+ case SurfaceFormat::R5G6B5_UINT16:
+ return 16;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/*static*/ void
+gfxUtils::ClipToRegion(gfxContext* aContext, const nsIntRegion& aRegion)
+{
+ aContext->NewPath();
+ for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
+ const IntRect& r = iter.Get();
+ aContext->Rectangle(gfxRect(r.x, r.y, r.width, r.height));
+ }
+ aContext->Clip();
+}
+
+/*static*/ void
+gfxUtils::ClipToRegion(DrawTarget* aTarget, const nsIntRegion& aRegion)
+{
+ uint32_t numRects = aRegion.GetNumRects();
+ // If there is only one rect, then the region bounds are equivalent to the
+ // contents. So just use push a single clip rect with the bounds.
+ if (numRects == 1) {
+ aTarget->PushClipRect(Rect(aRegion.GetBounds()));
+ return;
+ }
+
+ // Check if the target's transform will preserve axis-alignment and
+ // pixel-alignment for each rect. For now, just handle the common case
+ // of integer translations.
+ Matrix transform = aTarget->GetTransform();
+ if (transform.IsIntegerTranslation()) {
+ IntPoint translation = RoundedToInt(transform.GetTranslation());
+ AutoTArray<IntRect, 16> rects;
+ rects.SetLength(numRects);
+ uint32_t i = 0;
+ // Build the list of transformed rects by adding in the translation.
+ for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
+ IntRect rect = iter.Get();
+ rect.MoveBy(translation);
+ rects[i++] = rect;
+ }
+ aTarget->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
+ } else {
+ // The transform does not produce axis-aligned rects or a rect was not
+ // pixel-aligned. So just build a path with all the rects and clip to it
+ // instead.
+ RefPtr<PathBuilder> pathBuilder = aTarget->CreatePathBuilder();
+ for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
+ AppendRectToPath(pathBuilder, Rect(iter.Get()));
+ }
+ RefPtr<Path> path = pathBuilder->Finish();
+ aTarget->PushClip(path);
+ }
+}
+
+/*static*/ gfxFloat
+gfxUtils::ClampToScaleFactor(gfxFloat aVal)
+{
+ // Arbitary scale factor limitation. We can increase this
+ // for better scaling performance at the cost of worse
+ // quality.
+ static const gfxFloat kScaleResolution = 2;
+
+ // Negative scaling is just a flip and irrelevant to
+ // our resolution calculation.
+ if (aVal < 0.0) {
+ aVal = -aVal;
+ }
+
+ bool inverse = false;
+ if (aVal < 1.0) {
+ inverse = true;
+ aVal = 1 / aVal;
+ }
+
+ gfxFloat power = log(aVal)/log(kScaleResolution);
+
+ // If power is within 1e-5 of an integer, round to nearest to
+ // prevent floating point errors, otherwise round up to the
+ // next integer value.
+ if (fabs(power - NS_round(power)) < 1e-5) {
+ power = NS_round(power);
+ } else if (inverse) {
+ power = floor(power);
+ } else {
+ power = ceil(power);
+ }
+
+ gfxFloat scale = pow(kScaleResolution, power);
+
+ if (inverse) {
+ scale = 1 / scale;
+ }
+
+ return scale;
+}
+
+gfxMatrix
+gfxUtils::TransformRectToRect(const gfxRect& aFrom, const gfxPoint& aToTopLeft,
+ const gfxPoint& aToTopRight, const gfxPoint& aToBottomRight)
+{
+ gfxMatrix m;
+ if (aToTopRight.y == aToTopLeft.y && aToTopRight.x == aToBottomRight.x) {
+ // Not a rotation, so xy and yx are zero
+ m._21 = m._12 = 0.0;
+ m._11 = (aToBottomRight.x - aToTopLeft.x)/aFrom.width;
+ m._22 = (aToBottomRight.y - aToTopLeft.y)/aFrom.height;
+ m._31 = aToTopLeft.x - m._11*aFrom.x;
+ m._32 = aToTopLeft.y - m._22*aFrom.y;
+ } else {
+ NS_ASSERTION(aToTopRight.y == aToBottomRight.y && aToTopRight.x == aToTopLeft.x,
+ "Destination rectangle not axis-aligned");
+ m._11 = m._22 = 0.0;
+ m._21 = (aToBottomRight.x - aToTopLeft.x)/aFrom.height;
+ m._12 = (aToBottomRight.y - aToTopLeft.y)/aFrom.width;
+ m._31 = aToTopLeft.x - m._21*aFrom.y;
+ m._32 = aToTopLeft.y - m._12*aFrom.x;
+ }
+ return m;
+}
+
+Matrix
+gfxUtils::TransformRectToRect(const gfxRect& aFrom, const IntPoint& aToTopLeft,
+ const IntPoint& aToTopRight, const IntPoint& aToBottomRight)
+{
+ Matrix m;
+ if (aToTopRight.y == aToTopLeft.y && aToTopRight.x == aToBottomRight.x) {
+ // Not a rotation, so xy and yx are zero
+ m._12 = m._21 = 0.0;
+ m._11 = (aToBottomRight.x - aToTopLeft.x)/aFrom.width;
+ m._22 = (aToBottomRight.y - aToTopLeft.y)/aFrom.height;
+ m._31 = aToTopLeft.x - m._11*aFrom.x;
+ m._32 = aToTopLeft.y - m._22*aFrom.y;
+ } else {
+ NS_ASSERTION(aToTopRight.y == aToBottomRight.y && aToTopRight.x == aToTopLeft.x,
+ "Destination rectangle not axis-aligned");
+ m._11 = m._22 = 0.0;
+ m._21 = (aToBottomRight.x - aToTopLeft.x)/aFrom.height;
+ m._12 = (aToBottomRight.y - aToTopLeft.y)/aFrom.width;
+ m._31 = aToTopLeft.x - m._21*aFrom.y;
+ m._32 = aToTopLeft.y - m._12*aFrom.x;
+ }
+ return m;
+}
+
+/* This function is sort of shitty. We truncate doubles
+ * to ints then convert those ints back to doubles to make sure that
+ * they equal the doubles that we got in. */
+bool
+gfxUtils::GfxRectToIntRect(const gfxRect& aIn, IntRect* aOut)
+{
+ *aOut = IntRect(int32_t(aIn.X()), int32_t(aIn.Y()),
+ int32_t(aIn.Width()), int32_t(aIn.Height()));
+ return gfxRect(aOut->x, aOut->y, aOut->width, aOut->height).IsEqualEdges(aIn);
+}
+
+/* static */ void gfxUtils::ClearThebesSurface(gfxASurface* aSurface)
+{
+ if (aSurface->CairoStatus()) {
+ return;
+ }
+ cairo_surface_t* surf = aSurface->CairoSurface();
+ if (cairo_surface_status(surf)) {
+ return;
+ }
+ cairo_t* ctx = cairo_create(surf);
+ cairo_set_source_rgba(ctx, 0.0, 0.0, 0.0, 0.0);
+ cairo_set_operator(ctx, CAIRO_OPERATOR_SOURCE);
+ IntRect bounds(nsIntPoint(0, 0), aSurface->GetSize());
+ cairo_rectangle(ctx, bounds.x, bounds.y, bounds.width, bounds.height);
+ cairo_fill(ctx);
+ cairo_destroy(ctx);
+}
+
+/* static */ already_AddRefed<DataSourceSurface>
+gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(SourceSurface* aSurface,
+ SurfaceFormat aFormat)
+{
+ MOZ_ASSERT(aFormat != aSurface->GetFormat(),
+ "Unnecessary - and very expersive - surface format conversion");
+
+ Rect bounds(0, 0, aSurface->GetSize().width, aSurface->GetSize().height);
+
+ if (aSurface->GetType() != SurfaceType::DATA) {
+ // If the surface is NOT of type DATA then its data is not mapped into main
+ // memory. Format conversion is probably faster on the GPU, and by doing it
+ // there we can avoid any expensive uploads/readbacks except for (possibly)
+ // a single readback due to the unavoidable GetDataSurface() call. Using
+ // CreateOffscreenContentDrawTarget ensures the conversion happens on the
+ // GPU.
+ RefPtr<DrawTarget> dt = gfxPlatform::GetPlatform()->
+ CreateOffscreenContentDrawTarget(aSurface->GetSize(), aFormat);
+ if (!dt) {
+ gfxWarning() << "gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat failed in CreateOffscreenContentDrawTarget";
+ return nullptr;
+ }
+
+ // Using DrawSurface() here rather than CopySurface() because CopySurface
+ // is optimized for memcpy and therefore isn't good for format conversion.
+ // Using OP_OVER since in our case it's equivalent to OP_SOURCE and
+ // generally more optimized.
+ dt->DrawSurface(aSurface, bounds, bounds, DrawSurfaceOptions(),
+ DrawOptions(1.0f, CompositionOp::OP_OVER));
+ RefPtr<SourceSurface> surface = dt->Snapshot();
+ return surface->GetDataSurface();
+ }
+
+ // If the surface IS of type DATA then it may or may not be in main memory
+ // depending on whether or not it has been mapped yet. We have no way of
+ // knowing, so we can't be sure if it's best to create a data wrapping
+ // DrawTarget for the conversion or an offscreen content DrawTarget. We could
+ // guess it's not mapped and create an offscreen content DrawTarget, but if
+ // it is then we'll end up uploading the surface data, and most likely the
+ // caller is going to be accessing the resulting surface data, resulting in a
+ // readback (both very expensive operations). Alternatively we could guess
+ // the data is mapped and create a data wrapping DrawTarget and, if the
+ // surface is not in main memory, then we will incure a readback. The latter
+ // of these two "wrong choices" is the least costly (a readback, vs an
+ // upload and a readback), and more than likely the DATA surface that we've
+ // been passed actually IS in main memory anyway. For these reasons it's most
+ // likely best to create a data wrapping DrawTarget here to do the format
+ // conversion.
+ RefPtr<DataSourceSurface> dataSurface =
+ Factory::CreateDataSourceSurface(aSurface->GetSize(), aFormat);
+ DataSourceSurface::MappedSurface map;
+ if (!dataSurface ||
+ !dataSurface->Map(DataSourceSurface::MapType::READ_WRITE, &map)) {
+ return nullptr;
+ }
+ RefPtr<DrawTarget> dt =
+ Factory::CreateDrawTargetForData(BackendType::CAIRO,
+ map.mData,
+ dataSurface->GetSize(),
+ map.mStride,
+ aFormat);
+ if (!dt) {
+ dataSurface->Unmap();
+ return nullptr;
+ }
+ // Using DrawSurface() here rather than CopySurface() because CopySurface
+ // is optimized for memcpy and therefore isn't good for format conversion.
+ // Using OP_OVER since in our case it's equivalent to OP_SOURCE and
+ // generally more optimized.
+ dt->DrawSurface(aSurface, bounds, bounds, DrawSurfaceOptions(),
+ DrawOptions(1.0f, CompositionOp::OP_OVER));
+ dataSurface->Unmap();
+ return dataSurface.forget();
+}
+
+const uint32_t gfxUtils::sNumFrameColors = 8;
+
+/* static */ const gfx::Color&
+gfxUtils::GetColorForFrameNumber(uint64_t aFrameNumber)
+{
+ static bool initialized = false;
+ static gfx::Color colors[sNumFrameColors];
+
+ if (!initialized) {
+ uint32_t i = 0;
+ colors[i++] = gfx::Color::FromABGR(0xffff0000);
+ colors[i++] = gfx::Color::FromABGR(0xffcc00ff);
+ colors[i++] = gfx::Color::FromABGR(0xff0066cc);
+ colors[i++] = gfx::Color::FromABGR(0xff00ff00);
+ colors[i++] = gfx::Color::FromABGR(0xff33ffff);
+ colors[i++] = gfx::Color::FromABGR(0xffff0099);
+ colors[i++] = gfx::Color::FromABGR(0xff0000ff);
+ colors[i++] = gfx::Color::FromABGR(0xff999999);
+ MOZ_ASSERT(i == sNumFrameColors);
+ initialized = true;
+ }
+
+ return colors[aFrameNumber % sNumFrameColors];
+}
+
+static nsresult
+EncodeSourceSurfaceInternal(SourceSurface* aSurface,
+ const nsACString& aMimeType,
+ const nsAString& aOutputOptions,
+ gfxUtils::BinaryOrData aBinaryOrData,
+ FILE* aFile,
+ nsCString* aStrOut)
+{
+ MOZ_ASSERT(aBinaryOrData == gfxUtils::eDataURIEncode || aFile || aStrOut,
+ "Copying binary encoding to clipboard not currently supported");
+
+ const IntSize size = aSurface->GetSize();
+ if (size.IsEmpty()) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ const Size floatSize(size.width, size.height);
+
+ RefPtr<DataSourceSurface> dataSurface;
+ if (aSurface->GetFormat() != SurfaceFormat::B8G8R8A8) {
+ // FIXME bug 995807 (B8G8R8X8), bug 831898 (R5G6B5)
+ dataSurface =
+ gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(aSurface,
+ SurfaceFormat::B8G8R8A8);
+ } else {
+ dataSurface = aSurface->GetDataSurface();
+ }
+ if (!dataSurface) {
+ return NS_ERROR_FAILURE;
+ }
+
+ DataSourceSurface::MappedSurface map;
+ if (!dataSurface->Map(DataSourceSurface::MapType::READ, &map)) {
+ return NS_ERROR_FAILURE;
+ }
+
+ nsAutoCString encoderCID(
+ NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=") + aMimeType);
+ nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
+ if (!encoder) {
+#ifdef DEBUG
+ int32_t w = std::min(size.width, 8);
+ int32_t h = std::min(size.height, 8);
+ printf("Could not create encoder. Top-left %dx%d pixels contain:\n", w, h);
+ for (int32_t y = 0; y < h; ++y) {
+ for (int32_t x = 0; x < w; ++x) {
+ printf("%x ", reinterpret_cast<uint32_t*>(map.mData)[y*map.mStride+x]);
+ }
+ }
+#endif
+ dataSurface->Unmap();
+ return NS_ERROR_FAILURE;
+ }
+
+ nsresult rv = encoder->InitFromData(map.mData,
+ BufferSizeFromStrideAndHeight(map.mStride, size.height),
+ size.width,
+ size.height,
+ map.mStride,
+ imgIEncoder::INPUT_FORMAT_HOSTARGB,
+ aOutputOptions);
+ dataSurface->Unmap();
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCOMPtr<nsIInputStream> imgStream;
+ CallQueryInterface(encoder.get(), getter_AddRefs(imgStream));
+ if (!imgStream) {
+ return NS_ERROR_FAILURE;
+ }
+
+ uint64_t bufSize64;
+ rv = imgStream->Available(&bufSize64);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ NS_ENSURE_TRUE(bufSize64 < UINT32_MAX - 16, NS_ERROR_FAILURE);
+
+ uint32_t bufSize = (uint32_t)bufSize64;
+
+ // ...leave a little extra room so we can call read again and make sure we
+ // got everything. 16 bytes for better padding (maybe)
+ bufSize += 16;
+ uint32_t imgSize = 0;
+ Vector<char> imgData;
+ if (!imgData.initCapacity(bufSize)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ uint32_t numReadThisTime = 0;
+ while ((rv = imgStream->Read(imgData.begin() + imgSize,
+ bufSize - imgSize,
+ &numReadThisTime)) == NS_OK && numReadThisTime > 0)
+ {
+ // Update the length of the vector without overwriting the new data.
+ if (!imgData.growByUninitialized(numReadThisTime)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ imgSize += numReadThisTime;
+ if (imgSize == bufSize) {
+ // need a bigger buffer, just double
+ bufSize *= 2;
+ if (!imgData.resizeUninitialized(bufSize)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ }
+ }
+ NS_ENSURE_SUCCESS(rv, rv);
+ NS_ENSURE_TRUE(!imgData.empty(), NS_ERROR_FAILURE);
+
+ if (aBinaryOrData == gfxUtils::eBinaryEncode) {
+ if (aFile) {
+ fwrite(imgData.begin(), 1, imgSize, aFile);
+ }
+ return NS_OK;
+ }
+
+ // base 64, result will be null-terminated
+ nsCString encodedImg;
+ rv = Base64Encode(Substring(imgData.begin(), imgSize), encodedImg);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsCString string("data:");
+ string.Append(aMimeType);
+ string.Append(";base64,");
+ string.Append(encodedImg);
+
+ if (aFile) {
+#ifdef ANDROID
+ if (aFile == stdout || aFile == stderr) {
+ // ADB logcat cuts off long strings so we will break it down
+ const char* cStr = string.BeginReading();
+ size_t len = strlen(cStr);
+ while (true) {
+ printf_stderr("IMG: %.140s\n", cStr);
+ if (len <= 140)
+ break;
+ len -= 140;
+ cStr += 140;
+ }
+ }
+#endif
+ fprintf(aFile, "%s", string.BeginReading());
+ } else if (aStrOut) {
+ *aStrOut = string;
+ } else {
+ nsCOMPtr<nsIClipboardHelper> clipboard(do_GetService("@mozilla.org/widget/clipboardhelper;1", &rv));
+ if (clipboard) {
+ clipboard->CopyString(NS_ConvertASCIItoUTF16(string));
+ }
+ }
+ return NS_OK;
+}
+
+static nsCString
+EncodeSourceSurfaceAsPNGURI(SourceSurface* aSurface)
+{
+ nsCString string;
+ EncodeSourceSurfaceInternal(aSurface, NS_LITERAL_CSTRING("image/png"),
+ EmptyString(), gfxUtils::eDataURIEncode,
+ nullptr, &string);
+ return string;
+}
+
+/* static */ nsresult
+gfxUtils::EncodeSourceSurface(SourceSurface* aSurface,
+ const nsACString& aMimeType,
+ const nsAString& aOutputOptions,
+ BinaryOrData aBinaryOrData,
+ FILE* aFile)
+{
+ return EncodeSourceSurfaceInternal(aSurface, aMimeType, aOutputOptions,
+ aBinaryOrData, aFile, nullptr);
+}
+
+/* From Rec601:
+[R] [1.1643835616438356, 0.0, 1.5960267857142858] [ Y - 16]
+[G] = [1.1643835616438358, -0.3917622900949137, -0.8129676472377708] x [Cb - 128]
+[B] [1.1643835616438356, 2.017232142857143, 8.862867620416422e-17] [Cr - 128]
+
+For [0,1] instead of [0,255], and to 5 places:
+[R] [1.16438, 0.00000, 1.59603] [ Y - 0.06275]
+[G] = [1.16438, -0.39176, -0.81297] x [Cb - 0.50196]
+[B] [1.16438, 2.01723, 0.00000] [Cr - 0.50196]
+
+From Rec709:
+[R] [1.1643835616438356, 4.2781193979771426e-17, 1.7927410714285714] [ Y - 16]
+[G] = [1.1643835616438358, -0.21324861427372963, -0.532909328559444] x [Cb - 128]
+[B] [1.1643835616438356, 2.1124017857142854, 0.0] [Cr - 128]
+
+For [0,1] instead of [0,255], and to 5 places:
+[R] [1.16438, 0.00000, 1.79274] [ Y - 0.06275]
+[G] = [1.16438, -0.21325, -0.53291] x [Cb - 0.50196]
+[B] [1.16438, 2.11240, 0.00000] [Cr - 0.50196]
+*/
+
+/* static */ float*
+gfxUtils::Get4x3YuvColorMatrix(YUVColorSpace aYUVColorSpace)
+{
+ static const float yuv_to_rgb_rec601[12] = { 1.16438f, 0.0f, 1.59603f, 0.0f,
+ 1.16438f, -0.39176f, -0.81297f, 0.0f,
+ 1.16438f, 2.01723f, 0.0f, 0.0f,
+ };
+
+ static const float yuv_to_rgb_rec709[12] = { 1.16438f, 0.0f, 1.79274f, 0.0f,
+ 1.16438f, -0.21325f, -0.53291f, 0.0f,
+ 1.16438f, 2.11240f, 0.0f, 0.0f,
+ };
+
+ if (aYUVColorSpace == YUVColorSpace::BT709) {
+ return const_cast<float*>(yuv_to_rgb_rec709);
+ } else {
+ return const_cast<float*>(yuv_to_rgb_rec601);
+ }
+}
+
+/* static */ float*
+gfxUtils::Get3x3YuvColorMatrix(YUVColorSpace aYUVColorSpace)
+{
+ static const float yuv_to_rgb_rec601[9] = {
+ 1.16438f, 1.16438f, 1.16438f, 0.0f, -0.39176f, 2.01723f, 1.59603f, -0.81297f, 0.0f,
+ };
+ static const float yuv_to_rgb_rec709[9] = {
+ 1.16438f, 1.16438f, 1.16438f, 0.0f, -0.21325f, 2.11240f, 1.79274f, -0.53291f, 0.0f,
+ };
+
+ if (aYUVColorSpace == YUVColorSpace::BT709) {
+ return const_cast<float*>(yuv_to_rgb_rec709);
+ } else {
+ return const_cast<float*>(yuv_to_rgb_rec601);
+ }
+}
+
+/* static */ void
+gfxUtils::WriteAsPNG(SourceSurface* aSurface, const nsAString& aFile)
+{
+ WriteAsPNG(aSurface, NS_ConvertUTF16toUTF8(aFile).get());
+}
+
+/* static */ void
+gfxUtils::WriteAsPNG(SourceSurface* aSurface, const char* aFile)
+{
+ FILE* file = fopen(aFile, "wb");
+
+ if (!file) {
+ // Maybe the directory doesn't exist; try creating it, then fopen again.
+ nsresult rv = NS_ERROR_FAILURE;
+ nsCOMPtr<nsIFile> comFile = do_CreateInstance("@mozilla.org/file/local;1");
+ if (comFile) {
+ NS_ConvertUTF8toUTF16 utf16path((nsDependentCString(aFile)));
+ rv = comFile->InitWithPath(utf16path);
+ if (NS_SUCCEEDED(rv)) {
+ nsCOMPtr<nsIFile> dirPath;
+ comFile->GetParent(getter_AddRefs(dirPath));
+ if (dirPath) {
+ rv = dirPath->Create(nsIFile::DIRECTORY_TYPE, 0777);
+ if (NS_SUCCEEDED(rv) || rv == NS_ERROR_FILE_ALREADY_EXISTS) {
+ file = fopen(aFile, "wb");
+ }
+ }
+ }
+ }
+ if (!file) {
+ NS_WARNING("Failed to open file to create PNG!");
+ return;
+ }
+ }
+
+ EncodeSourceSurface(aSurface, NS_LITERAL_CSTRING("image/png"),
+ EmptyString(), eBinaryEncode, file);
+ fclose(file);
+}
+
+/* static */ void
+gfxUtils::WriteAsPNG(DrawTarget* aDT, const nsAString& aFile)
+{
+ WriteAsPNG(aDT, NS_ConvertUTF16toUTF8(aFile).get());
+}
+
+/* static */ void
+gfxUtils::WriteAsPNG(DrawTarget* aDT, const char* aFile)
+{
+ RefPtr<SourceSurface> surface = aDT->Snapshot();
+ if (surface) {
+ WriteAsPNG(surface, aFile);
+ } else {
+ NS_WARNING("Failed to get surface!");
+ }
+}
+
+/* static */ void
+gfxUtils::WriteAsPNG(nsIPresShell* aShell, const char* aFile)
+{
+ int32_t width = 1000, height = 1000;
+ nsRect r(0, 0, aShell->GetPresContext()->DevPixelsToAppUnits(width),
+ aShell->GetPresContext()->DevPixelsToAppUnits(height));
+
+ RefPtr<mozilla::gfx::DrawTarget> dt = gfxPlatform::GetPlatform()->
+ CreateOffscreenContentDrawTarget(IntSize(width, height),
+ SurfaceFormat::B8G8R8A8);
+ NS_ENSURE_TRUE(dt && dt->IsValid(), /*void*/);
+
+ RefPtr<gfxContext> context = gfxContext::CreateOrNull(dt);
+ MOZ_ASSERT(context); // already checked the draw target above
+ aShell->RenderDocument(r, 0, NS_RGB(255, 255, 0), context);
+ WriteAsPNG(dt.get(), aFile);
+}
+
+/* static */ void
+gfxUtils::DumpAsDataURI(SourceSurface* aSurface, FILE* aFile)
+{
+ EncodeSourceSurface(aSurface, NS_LITERAL_CSTRING("image/png"),
+ EmptyString(), eDataURIEncode, aFile);
+}
+
+/* static */ nsCString
+gfxUtils::GetAsDataURI(SourceSurface* aSurface)
+{
+ return EncodeSourceSurfaceAsPNGURI(aSurface);
+}
+
+/* static */ void
+gfxUtils::DumpAsDataURI(DrawTarget* aDT, FILE* aFile)
+{
+ RefPtr<SourceSurface> surface = aDT->Snapshot();
+ if (surface) {
+ DumpAsDataURI(surface, aFile);
+ } else {
+ NS_WARNING("Failed to get surface!");
+ }
+}
+
+/* static */ nsCString
+gfxUtils::GetAsLZ4Base64Str(DataSourceSurface* aSourceSurface)
+{
+ int32_t dataSize = aSourceSurface->GetSize().height * aSourceSurface->Stride();
+ auto compressedData = MakeUnique<char[]>(LZ4::maxCompressedSize(dataSize));
+ if (compressedData) {
+ int nDataSize = LZ4::compress((char*)aSourceSurface->GetData(),
+ dataSize,
+ compressedData.get());
+ if (nDataSize > 0) {
+ nsCString encodedImg;
+ nsresult rv = Base64Encode(Substring(compressedData.get(), nDataSize), encodedImg);
+ if (rv == NS_OK) {
+ nsCString string("");
+ string.AppendPrintf("data:image/lz4bgra;base64,%i,%i,%i,",
+ aSourceSurface->GetSize().width,
+ aSourceSurface->Stride(),
+ aSourceSurface->GetSize().height);
+ string.Append(encodedImg);
+ return string;
+ }
+ }
+ }
+ return nsCString("");
+}
+
+/* static */ nsCString
+gfxUtils::GetAsDataURI(DrawTarget* aDT)
+{
+ RefPtr<SourceSurface> surface = aDT->Snapshot();
+ if (surface) {
+ return EncodeSourceSurfaceAsPNGURI(surface);
+ } else {
+ NS_WARNING("Failed to get surface!");
+ return nsCString("");
+ }
+}
+
+/* static */ void
+gfxUtils::CopyAsDataURI(SourceSurface* aSurface)
+{
+ EncodeSourceSurface(aSurface, NS_LITERAL_CSTRING("image/png"),
+ EmptyString(), eDataURIEncode, nullptr);
+}
+
+/* static */ void
+gfxUtils::CopyAsDataURI(DrawTarget* aDT)
+{
+ RefPtr<SourceSurface> surface = aDT->Snapshot();
+ if (surface) {
+ CopyAsDataURI(surface);
+ } else {
+ NS_WARNING("Failed to get surface!");
+ }
+}
+
+/* static */ UniquePtr<uint8_t[]>
+gfxUtils::GetImageBuffer(gfx::DataSourceSurface* aSurface,
+ bool aIsAlphaPremultiplied,
+ int32_t* outFormat)
+{
+ *outFormat = 0;
+
+ DataSourceSurface::MappedSurface map;
+ if (!aSurface->Map(DataSourceSurface::MapType::READ, &map))
+ return nullptr;
+
+ uint32_t bufferSize = aSurface->GetSize().width * aSurface->GetSize().height * 4;
+ auto imageBuffer = MakeUniqueFallible<uint8_t[]>(bufferSize);
+ if (!imageBuffer) {
+ aSurface->Unmap();
+ return nullptr;
+ }
+ memcpy(imageBuffer.get(), map.mData, bufferSize);
+
+ aSurface->Unmap();
+
+ int32_t format = imgIEncoder::INPUT_FORMAT_HOSTARGB;
+ if (!aIsAlphaPremultiplied) {
+ // We need to convert to INPUT_FORMAT_RGBA, otherwise
+ // we are automatically considered premult, and unpremult'd.
+ // Yes, it is THAT silly.
+ // Except for different lossy conversions by color,
+ // we could probably just change the label, and not change the data.
+ gfxUtils::ConvertBGRAtoRGBA(imageBuffer.get(), bufferSize);
+ format = imgIEncoder::INPUT_FORMAT_RGBA;
+ }
+
+ *outFormat = format;
+ return imageBuffer;
+}
+
+/* static */ nsresult
+gfxUtils::GetInputStream(gfx::DataSourceSurface* aSurface,
+ bool aIsAlphaPremultiplied,
+ const char* aMimeType,
+ const char16_t* aEncoderOptions,
+ nsIInputStream** outStream)
+{
+ nsCString enccid("@mozilla.org/image/encoder;2?type=");
+ enccid += aMimeType;
+ nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(enccid.get());
+ if (!encoder)
+ return NS_ERROR_FAILURE;
+
+ int32_t format = 0;
+ UniquePtr<uint8_t[]> imageBuffer = GetImageBuffer(aSurface, aIsAlphaPremultiplied, &format);
+ if (!imageBuffer)
+ return NS_ERROR_FAILURE;
+
+ return dom::ImageEncoder::GetInputStream(aSurface->GetSize().width,
+ aSurface->GetSize().height,
+ imageBuffer.get(), format,
+ encoder, aEncoderOptions, outStream);
+}
+
+class GetFeatureStatusRunnable final : public dom::workers::WorkerMainThreadRunnable
+{
+public:
+ GetFeatureStatusRunnable(dom::workers::WorkerPrivate* workerPrivate,
+ const nsCOMPtr<nsIGfxInfo>& gfxInfo,
+ int32_t feature,
+ nsACString& failureId,
+ int32_t* status)
+ : WorkerMainThreadRunnable(workerPrivate,
+ NS_LITERAL_CSTRING("GFX :: GetFeatureStatus"))
+ , mGfxInfo(gfxInfo)
+ , mFeature(feature)
+ , mStatus(status)
+ , mFailureId(failureId)
+ , mNSResult(NS_OK)
+ {
+ }
+
+ bool MainThreadRun() override
+ {
+ if (mGfxInfo) {
+ mNSResult = mGfxInfo->GetFeatureStatus(mFeature, mFailureId, mStatus);
+ }
+ return true;
+ }
+
+ nsresult GetNSResult() const
+ {
+ return mNSResult;
+ }
+
+protected:
+ ~GetFeatureStatusRunnable() {}
+
+private:
+ nsCOMPtr<nsIGfxInfo> mGfxInfo;
+ int32_t mFeature;
+ int32_t* mStatus;
+ nsACString& mFailureId;
+ nsresult mNSResult;
+};
+
+/* static */ nsresult
+gfxUtils::ThreadSafeGetFeatureStatus(const nsCOMPtr<nsIGfxInfo>& gfxInfo,
+ int32_t feature, nsACString& failureId,
+ int32_t* status)
+{
+ if (!NS_IsMainThread()) {
+ dom::workers::WorkerPrivate* workerPrivate =
+ dom::workers::GetCurrentThreadWorkerPrivate();
+
+ RefPtr<GetFeatureStatusRunnable> runnable =
+ new GetFeatureStatusRunnable(workerPrivate, gfxInfo, feature, failureId,
+ status);
+
+ ErrorResult rv;
+ runnable->Dispatch(rv);
+ if (rv.Failed()) {
+ // XXXbz This is totally broken, since we're supposed to just abort
+ // everything up the callstack but the callers basically eat the
+ // exception. Ah, well.
+ return rv.StealNSResult();
+ }
+
+ return runnable->GetNSResult();
+ }
+
+ return gfxInfo->GetFeatureStatus(feature, failureId, status);
+}
+
+/* static */ bool
+gfxUtils::IsFeatureBlacklisted(nsCOMPtr<nsIGfxInfo> gfxInfo, int32_t feature,
+ nsACString* const out_blacklistId)
+{
+ if (!gfxInfo) {
+ gfxInfo = services::GetGfxInfo();
+ }
+
+ int32_t status;
+ if (!NS_SUCCEEDED(gfxUtils::ThreadSafeGetFeatureStatus(gfxInfo, feature,
+ *out_blacklistId, &status)))
+ {
+ out_blacklistId->AssignLiteral("");
+ return true;
+ }
+
+ return status != nsIGfxInfo::FEATURE_STATUS_OK;
+}
+
+/* static */ bool
+gfxUtils::DumpDisplayList() {
+ return gfxPrefs::LayoutDumpDisplayList() ||
+ (gfxPrefs::LayoutDumpDisplayListContent() && XRE_IsContentProcess());
+}
+
+FILE *gfxUtils::sDumpPaintFile = stderr;
+
+namespace mozilla {
+namespace gfx {
+
+Color ToDeviceColor(Color aColor)
+{
+ // aColor is pass-by-value since to get return value optimization goodness we
+ // need to return the same object from all return points in this function. We
+ // could declare a local Color variable and use that, but we might as well
+ // just use aColor.
+ if (gfxPlatform::GetCMSMode() == eCMSMode_All) {
+ qcms_transform *transform = gfxPlatform::GetCMSRGBTransform();
+ if (transform) {
+ gfxPlatform::TransformPixel(aColor, aColor, transform);
+ // Use the original alpha to avoid unnecessary float->byte->float
+ // conversion errors
+ }
+ }
+ return aColor;
+}
+
+Color ToDeviceColor(nscolor aColor)
+{
+ return ToDeviceColor(Color::FromABGR(aColor));
+}
+
+} // namespace gfx
+} // namespace mozilla
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 15:53:24 +0000