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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 "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_alpha(mDC));
} 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!");
return mozilla::gfx::IntSize(cairo_win32_surface_get_width(mSurface),
cairo_win32_surface_get_height(mSurface));
}
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