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-rw-r--r--gfx/thebes/gfxImageSurface.cpp326
1 files changed, 326 insertions, 0 deletions
diff --git a/gfx/thebes/gfxImageSurface.cpp b/gfx/thebes/gfxImageSurface.cpp
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+++ b/gfx/thebes/gfxImageSurface.cpp
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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 "mozilla/MemoryReporting.h"
+#if defined(HAVE_POSIX_MEMALIGN)
+# include "gfxAlphaRecovery.h"
+#endif
+#include "gfxImageSurface.h"
+
+#include "cairo.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/HelpersCairo.h"
+#include "gfx2DGlue.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+gfxImageSurface::gfxImageSurface()
+ : mSize(0, 0),
+ mOwnsData(false),
+ mData(nullptr),
+ mFormat(SurfaceFormat::UNKNOWN),
+ mStride(0) {}
+
+void gfxImageSurface::InitFromSurface(cairo_surface_t* csurf) {
+ if (!csurf || cairo_surface_status(csurf)) {
+ MakeInvalid();
+ return;
+ }
+
+ mSize.width = cairo_image_surface_get_width(csurf);
+ mSize.height = cairo_image_surface_get_height(csurf);
+ mData = cairo_image_surface_get_data(csurf);
+ mFormat = CairoFormatToGfxFormat(cairo_image_surface_get_format(csurf));
+ mOwnsData = false;
+ mStride = cairo_image_surface_get_stride(csurf);
+
+ Init(csurf, true);
+}
+
+gfxImageSurface::gfxImageSurface(unsigned char* aData, const IntSize& aSize,
+ long aStride, gfxImageFormat aFormat) {
+ InitWithData(aData, aSize, aStride, aFormat);
+}
+
+void gfxImageSurface::MakeInvalid() {
+ mSize = IntSize(-1, -1);
+ mData = nullptr;
+ mStride = 0;
+}
+
+void gfxImageSurface::InitWithData(unsigned char* aData, const IntSize& aSize,
+ long aStride, gfxImageFormat aFormat) {
+ mSize = aSize;
+ mOwnsData = false;
+ mData = aData;
+ mFormat = aFormat;
+ mStride = aStride;
+
+ if (!Factory::CheckSurfaceSize(aSize)) MakeInvalid();
+
+ cairo_format_t cformat = GfxFormatToCairoFormat(mFormat);
+ cairo_surface_t* surface = cairo_image_surface_create_for_data(
+ (unsigned char*)mData, cformat, mSize.width, mSize.height, mStride);
+
+ // cairo_image_surface_create_for_data can return a 'null' surface
+ // in out of memory conditions. The gfxASurface::Init call checks
+ // the surface it receives to see if there is an error with the
+ // surface and handles it appropriately. That is why there is
+ // no check here.
+ Init(surface);
+}
+
+static void* TryAllocAlignedBytes(size_t aSize) {
+ // Use fallible allocators here
+#if defined(HAVE_POSIX_MEMALIGN)
+ void* ptr;
+ // Try to align for fast alpha recovery. This should only help
+ // cairo too, can't hurt.
+ return posix_memalign(&ptr, 1 << gfxAlphaRecovery::GoodAlignmentLog2(), aSize)
+ ? nullptr
+ : ptr;
+#else
+ // Oh well, hope that luck is with us in the allocator
+ return malloc(aSize);
+#endif
+}
+
+gfxImageSurface::gfxImageSurface(const IntSize& size, gfxImageFormat format,
+ bool aClear)
+ : mSize(size), mData(nullptr), mFormat(format) {
+ AllocateAndInit(0, 0, aClear);
+}
+
+void gfxImageSurface::AllocateAndInit(long aStride, int32_t aMinimalAllocation,
+ bool aClear) {
+ // The callers should set mSize and mFormat.
+ MOZ_ASSERT(!mData);
+ mData = nullptr;
+ mOwnsData = false;
+
+ mStride = aStride > 0 ? aStride : ComputeStride();
+ if (aMinimalAllocation < mSize.height * mStride)
+ aMinimalAllocation = mSize.height * mStride;
+
+ if (!Factory::CheckSurfaceSize(mSize)) MakeInvalid();
+
+ // if we have a zero-sized surface, just leave mData nullptr
+ if (mSize.height * mStride > 0) {
+ // This can fail to allocate memory aligned as we requested,
+ // or it can fail to allocate any memory at all.
+ mData = (unsigned char*)TryAllocAlignedBytes(aMinimalAllocation);
+ if (!mData) return;
+ if (aClear) memset(mData, 0, aMinimalAllocation);
+ }
+
+ mOwnsData = true;
+
+ cairo_format_t cformat = GfxFormatToCairoFormat(mFormat);
+ cairo_surface_t* surface = cairo_image_surface_create_for_data(
+ (unsigned char*)mData, cformat, mSize.width, mSize.height, mStride);
+
+ Init(surface);
+
+ if (mSurfaceValid) {
+ RecordMemoryUsed(mSize.height * ComputeStride() + sizeof(gfxImageSurface));
+ }
+}
+
+gfxImageSurface::gfxImageSurface(const IntSize& size, gfxImageFormat format,
+ long aStride, int32_t aExtraBytes, bool aClear)
+ : mSize(size), mData(nullptr), mFormat(format) {
+ AllocateAndInit(aStride, aExtraBytes, aClear);
+}
+
+gfxImageSurface::gfxImageSurface(cairo_surface_t* csurf) {
+ mSize.width = cairo_image_surface_get_width(csurf);
+ mSize.height = cairo_image_surface_get_height(csurf);
+ mData = cairo_image_surface_get_data(csurf);
+ mFormat = CairoFormatToGfxFormat(cairo_image_surface_get_format(csurf));
+ mOwnsData = false;
+ mStride = cairo_image_surface_get_stride(csurf);
+
+ Init(csurf, true);
+}
+
+gfxImageSurface::~gfxImageSurface() {
+ if (mOwnsData) free(mData);
+}
+
+/*static*/
+long gfxImageSurface::ComputeStride(const IntSize& aSize,
+ gfxImageFormat aFormat) {
+ long stride;
+
+ if (aFormat == SurfaceFormat::A8R8G8B8_UINT32)
+ stride = aSize.width * 4;
+ else if (aFormat == SurfaceFormat::X8R8G8B8_UINT32)
+ stride = aSize.width * 4;
+ else if (aFormat == SurfaceFormat::R5G6B5_UINT16)
+ stride = aSize.width * 2;
+ else if (aFormat == SurfaceFormat::A8)
+ stride = aSize.width;
+ else {
+ NS_WARNING("Unknown format specified to gfxImageSurface!");
+ stride = aSize.width * 4;
+ }
+
+ stride = ((stride + 3) / 4) * 4;
+
+ return stride;
+}
+
+size_t gfxImageSurface::SizeOfExcludingThis(
+ mozilla::MallocSizeOf aMallocSizeOf) const {
+ size_t n = gfxASurface::SizeOfExcludingThis(aMallocSizeOf);
+ if (mOwnsData) {
+ n += aMallocSizeOf(mData);
+ }
+ return n;
+}
+
+size_t gfxImageSurface::SizeOfIncludingThis(
+ mozilla::MallocSizeOf aMallocSizeOf) const {
+ return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+bool gfxImageSurface::SizeOfIsMeasured() const { return true; }
+
+// helper function for the CopyFrom methods
+static void CopyForStride(unsigned char* aDest, unsigned char* aSrc,
+ const IntSize& aSize, long aDestStride,
+ long aSrcStride) {
+ if (aDestStride == aSrcStride) {
+ memcpy(aDest, aSrc, aSrcStride * aSize.height);
+ } else {
+ int lineSize = std::min(aDestStride, aSrcStride);
+ for (int i = 0; i < aSize.height; i++) {
+ unsigned char* src = aSrc + aSrcStride * i;
+ unsigned char* dst = aDest + aDestStride * i;
+
+ memcpy(dst, src, lineSize);
+ }
+ }
+}
+
+// helper function for the CopyFrom methods
+static bool FormatsAreCompatible(gfxImageFormat a1, gfxImageFormat a2) {
+ if (a1 != a2 &&
+ !(a1 == SurfaceFormat::A8R8G8B8_UINT32 &&
+ a2 == SurfaceFormat::X8R8G8B8_UINT32) &&
+ !(a1 == SurfaceFormat::X8R8G8B8_UINT32 &&
+ a2 == SurfaceFormat::A8R8G8B8_UINT32)) {
+ return false;
+ }
+
+ return true;
+}
+
+bool gfxImageSurface::CopyFrom(SourceSurface* aSurface) {
+ RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
+
+ if (!data) {
+ return false;
+ }
+
+ IntSize size(data->GetSize().width, data->GetSize().height);
+ if (size != mSize) {
+ return false;
+ }
+
+ if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
+ mFormat)) {
+ return false;
+ }
+
+ DataSourceSurface::ScopedMap map(data, DataSourceSurface::READ);
+ CopyForStride(mData, map.GetData(), size, mStride, map.GetStride());
+
+ return true;
+}
+
+bool gfxImageSurface::CopyFrom(gfxImageSurface* other) {
+ if (other->mSize != mSize) {
+ return false;
+ }
+
+ if (!FormatsAreCompatible(other->mFormat, mFormat)) {
+ return false;
+ }
+
+ CopyForStride(mData, other->mData, mSize, mStride, other->mStride);
+
+ return true;
+}
+
+bool gfxImageSurface::CopyTo(SourceSurface* aSurface) {
+ RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
+
+ if (!data) {
+ return false;
+ }
+
+ IntSize size(data->GetSize().width, data->GetSize().height);
+ if (size != mSize) {
+ return false;
+ }
+
+ if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
+ mFormat)) {
+ return false;
+ }
+
+ DataSourceSurface::ScopedMap map(data, DataSourceSurface::READ_WRITE);
+ CopyForStride(map.GetData(), mData, size, map.GetStride(), mStride);
+
+ return true;
+}
+
+already_AddRefed<DataSourceSurface>
+gfxImageSurface::CopyToB8G8R8A8DataSourceSurface() {
+ RefPtr<DataSourceSurface> dataSurface = Factory::CreateDataSourceSurface(
+ IntSize(GetSize().width, GetSize().height), SurfaceFormat::B8G8R8A8);
+ if (dataSurface) {
+ CopyTo(dataSurface);
+ }
+ return dataSurface.forget();
+}
+
+already_AddRefed<gfxSubimageSurface> gfxImageSurface::GetSubimage(
+ const gfxRect& aRect) {
+ gfxRect r(aRect);
+ r.Round();
+ MOZ_ASSERT(gfxRect(0, 0, mSize.width, mSize.height).Contains(r));
+
+ gfxImageFormat format = Format();
+
+ unsigned char* subData =
+ Data() + (Stride() * (int)r.Y()) +
+ (int)r.X() * gfxASurface::BytePerPixelFromFormat(Format());
+
+ if (format == SurfaceFormat::A8R8G8B8_UINT32 &&
+ GetOpaqueRect().Contains(aRect)) {
+ format = SurfaceFormat::X8R8G8B8_UINT32;
+ }
+
+ RefPtr<gfxSubimageSurface> image = new gfxSubimageSurface(
+ this, subData, IntSize((int)r.Width(), (int)r.Height()), format);
+
+ return image.forget();
+}
+
+gfxSubimageSurface::gfxSubimageSurface(gfxImageSurface* aParent,
+ unsigned char* aData,
+ const IntSize& aSize,
+ gfxImageFormat aFormat)
+ : gfxImageSurface(aData, aSize, aParent->Stride(), aFormat),
+ mParent(aParent) {}
+
+already_AddRefed<gfxImageSurface> gfxImageSurface::GetAsImageSurface() {
+ RefPtr<gfxImageSurface> surface = this;
+ return surface.forget();
+}