gecko-dev/gfx/thebes/gfxQuartzSurface.cpp

170 строки
5.3 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 "gfxQuartzSurface.h"
#include "gfxContext.h"
#include "cairo-quartz.h"
void
gfxQuartzSurface::MakeInvalid()
{
mSize = gfxIntSize(-1, -1);
}
gfxQuartzSurface::gfxQuartzSurface(const gfxSize& desiredSize, gfxImageFormat format,
bool aForPrinting)
: mCGContext(NULL), mSize(desiredSize), mForPrinting(aForPrinting)
{
gfxIntSize size((unsigned int) floor(desiredSize.width),
(unsigned int) floor(desiredSize.height));
if (!CheckSurfaceSize(size))
MakeInvalid();
unsigned int width = static_cast<unsigned int>(mSize.width);
unsigned int height = static_cast<unsigned int>(mSize.height);
cairo_surface_t *surf = cairo_quartz_surface_create
((cairo_format_t) format, width, height);
mCGContext = cairo_quartz_surface_get_cg_context (surf);
CGContextRetain(mCGContext);
Init(surf);
}
gfxQuartzSurface::gfxQuartzSurface(CGContextRef context,
const gfxSize& desiredSize,
bool aForPrinting)
: mCGContext(context), mSize(desiredSize), mForPrinting(aForPrinting)
{
gfxIntSize size((unsigned int) floor(desiredSize.width),
(unsigned int) floor(desiredSize.height));
if (!CheckSurfaceSize(size))
MakeInvalid();
unsigned int width = static_cast<unsigned int>(mSize.width);
unsigned int height = static_cast<unsigned int>(mSize.height);
cairo_surface_t *surf =
cairo_quartz_surface_create_for_cg_context(context,
width, height);
CGContextRetain(mCGContext);
Init(surf);
}
gfxQuartzSurface::gfxQuartzSurface(CGContextRef context,
const gfxIntSize& size,
bool aForPrinting)
: mCGContext(context), mSize(size), mForPrinting(aForPrinting)
{
if (!CheckSurfaceSize(size))
MakeInvalid();
unsigned int width = static_cast<unsigned int>(mSize.width);
unsigned int height = static_cast<unsigned int>(mSize.height);
cairo_surface_t *surf =
cairo_quartz_surface_create_for_cg_context(context,
width, height);
CGContextRetain(mCGContext);
Init(surf);
}
gfxQuartzSurface::gfxQuartzSurface(cairo_surface_t *csurf,
bool aForPrinting) :
mSize(-1.0, -1.0), mForPrinting(aForPrinting)
{
mCGContext = cairo_quartz_surface_get_cg_context (csurf);
CGContextRetain (mCGContext);
Init(csurf, true);
}
gfxQuartzSurface::gfxQuartzSurface(unsigned char *data,
const gfxSize& desiredSize,
long stride,
gfxImageFormat format,
bool aForPrinting)
: mCGContext(nullptr), mSize(desiredSize), mForPrinting(aForPrinting)
{
gfxIntSize size((unsigned int) floor(desiredSize.width),
(unsigned int) floor(desiredSize.height));
if (!CheckSurfaceSize(size))
MakeInvalid();
unsigned int width = static_cast<unsigned int>(mSize.width);
unsigned int height = static_cast<unsigned int>(mSize.height);
cairo_surface_t *surf = cairo_quartz_surface_create_for_data
(data, (cairo_format_t) format, width, height, stride);
mCGContext = cairo_quartz_surface_get_cg_context (surf);
CGContextRetain(mCGContext);
Init(surf);
}
already_AddRefed<gfxASurface>
gfxQuartzSurface::CreateSimilarSurface(gfxContentType aType,
const gfxIntSize& aSize)
{
cairo_surface_t *surface =
cairo_quartz_surface_create_cg_layer(mSurface, (cairo_content_t)aType,
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();
}
CGContextRef
gfxQuartzSurface::GetCGContextWithClip(gfxContext *ctx)
{
return cairo_quartz_get_cg_context_with_clip(ctx->GetCairo());
}
int32_t gfxQuartzSurface::GetDefaultContextFlags() const
{
if (mForPrinting)
return gfxContext::FLAG_DISABLE_SNAPPING |
gfxContext::FLAG_DISABLE_COPY_BACKGROUND;
return 0;
}
already_AddRefed<gfxImageSurface> gfxQuartzSurface::GetAsImageSurface()
{
cairo_surface_t *surface = cairo_quartz_surface_get_image(mSurface);
if (!surface)
return nullptr;
nsRefPtr<gfxASurface> img = Wrap(surface);
// cairo_quartz_surface_get_image returns a referenced image, and thebes
// shares the refcounts of Cairo surfaces. However, Wrap also adds a
// reference to the image. We need to remove one of these references
// explicitly so we don't leak.
gfxImageSurface* imgSurface = static_cast<gfxImageSurface*> (img.forget().get());
imgSurface->Release();
return imgSurface;
}
gfxQuartzSurface::~gfxQuartzSurface()
{
CGContextRelease(mCGContext);
}