gecko-dev/gfx/thebes/gfxWindowsSurface.cpp

323 lines
8.7 KiB
C++

/* -*- 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 "cairo.h"
#include "cairo-win32.h"
#include "nsString.h"
gfxWindowsSurface::gfxWindowsSurface(HWND wnd, uint32_t flags) :
mOwnsDC(true), mForPrinting(false), mWnd(wnd)
{
mDC = ::GetDC(mWnd);
InitWithDC(flags);
}
gfxWindowsSurface::gfxWindowsSurface(HDC dc, uint32_t flags) :
mOwnsDC(false), mForPrinting(false), mDC(dc), mWnd(nullptr)
{
if (flags & FLAG_TAKE_DC)
mOwnsDC = true;
#ifdef NS_PRINTING
if (flags & FLAG_FOR_PRINTING) {
Init(cairo_win32_printing_surface_create(mDC));
mForPrinting = true;
} else
#endif
InitWithDC(flags);
}
void
gfxWindowsSurface::MakeInvalid(gfxIntSize& size)
{
size = gfxIntSize(-1, -1);
}
gfxWindowsSurface::gfxWindowsSurface(const gfxIntSize& realSize, gfxImageFormat imageFormat) :
mOwnsDC(false), mForPrinting(false), mWnd(nullptr)
{
gfxIntSize size(realSize);
if (!CheckSurfaceSize(size))
MakeInvalid(size);
cairo_surface_t *surf = cairo_win32_surface_create_with_dib((cairo_format_t)imageFormat,
size.width, size.height);
Init(surf);
RecordMemoryUsed(size.width * size.height * 4 + sizeof(gfxWindowsSurface));
if (CairoStatus() == 0)
mDC = cairo_win32_surface_get_dc(CairoSurface());
else
mDC = nullptr;
}
gfxWindowsSurface::gfxWindowsSurface(HDC dc, const gfxIntSize& realSize, gfxImageFormat imageFormat) :
mOwnsDC(false), mForPrinting(false), mWnd(nullptr)
{
gfxIntSize size(realSize);
if (!CheckSurfaceSize(size))
MakeInvalid(size);
cairo_surface_t *surf = cairo_win32_surface_create_with_ddb(dc, (cairo_format_t)imageFormat,
size.width, size.height);
Init(surf);
if (mSurfaceValid) {
// DDBs will generally only use 3 bytes per pixel when RGB24
int bytesPerPixel = ((imageFormat == gfxASurface::ImageFormatRGB24) ? 3 : 4);
RecordMemoryUsed(size.width * size.height * bytesPerPixel + sizeof(gfxWindowsSurface));
}
if (CairoStatus() == 0)
mDC = cairo_win32_surface_get_dc(CairoSurface());
else
mDC = nullptr;
}
gfxWindowsSurface::gfxWindowsSurface(cairo_surface_t *csurf) :
mOwnsDC(false), mForPrinting(false), mWnd(nullptr)
{
if (cairo_surface_status(csurf) == 0)
mDC = cairo_win32_surface_get_dc(csurf);
else
mDC = nullptr;
if (cairo_surface_get_type(csurf) == CAIRO_SURFACE_TYPE_WIN32_PRINTING)
mForPrinting = true;
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 gfxIntSize& aSize)
{
if (!mSurface || !mSurfaceValid) {
return nullptr;
}
cairo_surface_t *surface;
if (GetContentType() == CONTENT_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 CONTENT_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(CONTENT_COLOR_ALPHA)
// (e.g. a backbuffer for the window) --- that new surface *would*
// have a DIB.
surface =
cairo_win32_surface_create_with_dib(cairo_format_t(gfxPlatform::GetPlatform()->OptimalFormatForContent(aContent)),
aSize.width, aSize.height);
} else {
surface =
cairo_surface_create_similar(mSurface, cairo_content_t(aContent),
aSize.width, aSize.height);
}
if (cairo_surface_status(surface)) {
cairo_surface_destroy(surface);
return nullptr;
}
nsRefPtr<gfxASurface> result = Wrap(surface);
cairo_surface_destroy(surface);
return result.forget();
}
gfxWindowsSurface::~gfxWindowsSurface()
{
if (mOwnsDC) {
if (mWnd)
::ReleaseDC(mWnd, mDC);
else
::DeleteDC(mDC);
}
}
HDC
gfxWindowsSurface::GetDCWithClip(gfxContext *ctx)
{
return cairo_win32_get_dc_with_clip (ctx->GetCairo());
}
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!");
if (mForPrinting)
return nullptr;
cairo_surface_t *isurf = cairo_win32_surface_get_image(CairoSurface());
if (!isurf)
return nullptr;
return gfxASurface::Wrap(isurf).downcast<gfxImageSurface>();
}
already_AddRefed<gfxWindowsSurface>
gfxWindowsSurface::OptimizeToDDB(HDC dc, const gfxIntSize& size, gfxImageFormat format)
{
if (mForPrinting)
return nullptr;
if (format != ImageFormatRGB24)
return nullptr;
nsRefPtr<gfxWindowsSurface> wsurf = new gfxWindowsSurface(dc, size, format);
if (wsurf->CairoStatus() != 0)
return nullptr;
gfxContext tmpCtx(wsurf);
tmpCtx.SetOperator(gfxContext::OPERATOR_SOURCE);
tmpCtx.SetSource(this);
tmpCtx.Paint();
// we let the new DDB surfaces be converted back to dibsections if
// acquire_source_image is called on them
cairo_win32_surface_set_can_convert_to_dib(wsurf->CairoSurface(), TRUE);
return wsurf.forget().downcast<gfxWindowsSurface>();
}
nsresult
gfxWindowsSurface::BeginPrinting(const nsAString& aTitle,
const nsAString& aPrintToFileName)
{
#ifdef NS_PRINTING
#define DOC_TITLE_LENGTH (MAX_PATH-1)
DOCINFOW docinfo;
nsString titleStr(aTitle);
if (titleStr.Length() > DOC_TITLE_LENGTH) {
titleStr.SetLength(DOC_TITLE_LENGTH-3);
titleStr.AppendLiteral("...");
}
nsString docName(aPrintToFileName);
docinfo.cbSize = sizeof(docinfo);
docinfo.lpszDocName = titleStr.Length() > 0 ? titleStr.get() : L"Mozilla Document";
docinfo.lpszOutput = docName.Length() > 0 ? docName.get() : nullptr;
docinfo.lpszDatatype = NULL;
docinfo.fwType = 0;
::StartDocW(mDC, &docinfo);
return NS_OK;
#else
return NS_ERROR_FAILURE;
#endif
}
nsresult
gfxWindowsSurface::EndPrinting()
{
#ifdef NS_PRINTING
int result = ::EndDoc(mDC);
if (result <= 0)
return NS_ERROR_FAILURE;
return NS_OK;
#else
return NS_ERROR_FAILURE;
#endif
}
nsresult
gfxWindowsSurface::AbortPrinting()
{
#ifdef NS_PRINTING
int result = ::AbortDoc(mDC);
if (result <= 0)
return NS_ERROR_FAILURE;
return NS_OK;
#else
return NS_ERROR_FAILURE;
#endif
}
nsresult
gfxWindowsSurface::BeginPage()
{
#ifdef NS_PRINTING
int result = ::StartPage(mDC);
if (result <= 0)
return NS_ERROR_FAILURE;
return NS_OK;
#else
return NS_ERROR_FAILURE;
#endif
}
nsresult
gfxWindowsSurface::EndPage()
{
#ifdef NS_PRINTING
if (mForPrinting)
cairo_surface_show_page(CairoSurface());
int result = ::EndPage(mDC);
if (result <= 0)
return NS_ERROR_FAILURE;
return NS_OK;
#else
return NS_ERROR_FAILURE;
#endif
}
int32_t
gfxWindowsSurface::GetDefaultContextFlags() const
{
if (mForPrinting)
return gfxContext::FLAG_SIMPLIFY_OPERATORS |
gfxContext::FLAG_DISABLE_SNAPPING |
gfxContext::FLAG_DISABLE_COPY_BACKGROUND;
return 0;
}
const gfxIntSize
gfxWindowsSurface::GetSize() const
{
if (!mSurfaceValid) {
NS_WARNING ("GetImageSurface on an invalid (null) surface; who's calling this without checking for surface errors?");
return gfxIntSize(-1, -1);
}
NS_ASSERTION(mSurface != nullptr, "CairoSurface() shouldn't be nullptr when mSurfaceValid is TRUE!");
return gfxIntSize(cairo_win32_surface_get_width(mSurface),
cairo_win32_surface_get_height(mSurface));
}
gfxASurface::MemoryLocation
gfxWindowsSurface::GetMemoryLocation() const
{
return MEMORY_IN_PROCESS_NONHEAP;
}