Source code

Revision control

Other Tools

/* -*- 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 "gfxWindowsSurface.h"
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/HelpersCairo.h"
#include "mozilla/gfx/Logging.h"
#include "cairo.h"
#include "cairo-win32.h"
#include "nsString.h"
gfxWindowsSurface::gfxWindowsSurface(HDC dc, uint32_t flags)
: mOwnsDC(false), mDC(dc), mWnd(nullptr) {
InitWithDC(flags);
}
void gfxWindowsSurface::MakeInvalid(mozilla::gfx::IntSize& size) {
size = mozilla::gfx::IntSize(-1, -1);
}
gfxWindowsSurface::gfxWindowsSurface(const mozilla::gfx::IntSize& realSize,
gfxImageFormat imageFormat)
: mOwnsDC(false), mWnd(nullptr) {
mozilla::gfx::IntSize size(realSize);
if (!mozilla::gfx::Factory::CheckSurfaceSize(size)) MakeInvalid(size);
cairo_format_t cformat = GfxFormatToCairoFormat(imageFormat);
cairo_surface_t* surf =
cairo_win32_surface_create_with_dib(cformat, size.width, size.height);
Init(surf);
if (CairoStatus() == CAIRO_STATUS_SUCCESS) {
mDC = cairo_win32_surface_get_dc(CairoSurface());
RecordMemoryUsed(size.width * size.height * 4 + sizeof(gfxWindowsSurface));
} else {
mDC = nullptr;
}
}
gfxWindowsSurface::gfxWindowsSurface(cairo_surface_t* csurf)
: mOwnsDC(false), mWnd(nullptr) {
if (cairo_surface_status(csurf) == 0)
mDC = cairo_win32_surface_get_dc(csurf);
else
mDC = nullptr;
MOZ_ASSERT(cairo_surface_get_type(csurf) !=
CAIRO_SURFACE_TYPE_WIN32_PRINTING);
Init(csurf, true);
}
void gfxWindowsSurface::InitWithDC(uint32_t flags) {
if (flags & FLAG_IS_TRANSPARENT) {
Init(cairo_win32_surface_create_with_format(mDC, CAIRO_FORMAT_ARGB32));
} else {
Init(cairo_win32_surface_create(mDC));
}
}
already_AddRefed<gfxASurface> gfxWindowsSurface::CreateSimilarSurface(
gfxContentType aContent, const mozilla::gfx::IntSize& aSize) {
if (!mSurface || !mSurfaceValid) {
return nullptr;
}
cairo_surface_t* surface;
if (GetContentType() == gfxContentType::COLOR_ALPHA) {
// When creating a similar surface to a transparent surface, ensure
// the new surface uses a DIB. cairo_surface_create_similar won't
// use a DIB for a gfxContentType::COLOR surface if this surface doesn't
// have a DIB (e.g. if we're a transparent window surface). But
// we need a DIB to perform well if the new surface is composited into
// a surface that's the result of
// create_similar(gfxContentType::COLOR_ALPHA) (e.g. a backbuffer for the
// window) --- that new surface *would* have a DIB.
gfxImageFormat gformat =
gfxPlatform::GetPlatform()->OptimalFormatForContent(aContent);
cairo_format_t cformat = GfxFormatToCairoFormat(gformat);
surface =
cairo_win32_surface_create_with_dib(cformat, aSize.width, aSize.height);
} else {
surface = cairo_surface_create_similar(
mSurface, (cairo_content_t)(int)aContent, aSize.width, aSize.height);
}
if (cairo_surface_status(surface)) {
cairo_surface_destroy(surface);
return nullptr;
}
RefPtr<gfxASurface> result = Wrap(surface, aSize);
cairo_surface_destroy(surface);
return result.forget();
}
gfxWindowsSurface::~gfxWindowsSurface() {
if (mOwnsDC) {
if (mWnd)
::ReleaseDC(mWnd, mDC);
else
::DeleteDC(mDC);
}
}
HDC gfxWindowsSurface::GetDC() {
return cairo_win32_surface_get_dc(CairoSurface());
}
already_AddRefed<gfxImageSurface> gfxWindowsSurface::GetAsImageSurface() {
if (!mSurfaceValid) {
NS_WARNING(
"GetImageSurface on an invalid (null) surface; who's calling this "
"without checking for surface errors?");
return nullptr;
}
NS_ASSERTION(
CairoSurface() != nullptr,
"CairoSurface() shouldn't be nullptr when mSurfaceValid is TRUE!");
cairo_surface_t* isurf = cairo_win32_surface_get_image(CairoSurface());
if (!isurf) return nullptr;
RefPtr<gfxImageSurface> result =
gfxASurface::Wrap(isurf).downcast<gfxImageSurface>();
result->SetOpaqueRect(GetOpaqueRect());
return result.forget();
}
const mozilla::gfx::IntSize gfxWindowsSurface::GetSize() const {
if (!mSurfaceValid) {
NS_WARNING(
"GetImageSurface on an invalid (null) surface; who's calling this "
"without checking for surface errors?");
return mozilla::gfx::IntSize(-1, -1);
}
NS_ASSERTION(
mSurface != nullptr,
"CairoSurface() shouldn't be nullptr when mSurfaceValid is TRUE!");
int width, height;
if (cairo_win32_surface_get_size(mSurface, &width, &height) !=
CAIRO_STATUS_SUCCESS) {
return mozilla::gfx::IntSize(-1, -1);
}
return mozilla::gfx::IntSize(width, height);
}