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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();
}