gfx/thebes/gfxQuartzSurface.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "gfxQuartzSurface.h"
   7 #include "gfxContext.h"
   8 #include "gfxImageSurface.h"
   9 #include "mozilla/gfx/2D.h"
  10 #include "mozilla/gfx/HelpersCairo.h"
  11
  12 #include "cairo-quartz.h"
  13
  14 void gfxQuartzSurface::MakeInvalid() { mSize = mozilla::gfx::IntSize(-1, -1); }
  15
  16 gfxQuartzSurface::gfxQuartzSurface(const mozilla::gfx::IntSize& desiredSize,
  17                                    gfxImageFormat format)
  18     : mCGContext(nullptr), mSize(desiredSize) {
  19   if (!mozilla::gfx::Factory::CheckSurfaceSize(desiredSize)) MakeInvalid();
  20
  21   unsigned int width = static_cast<unsigned int>(mSize.width);
  22   unsigned int height = static_cast<unsigned int>(mSize.height);
  23
  24   cairo_format_t cformat = GfxFormatToCairoFormat(format);
  25   cairo_surface_t* surf = cairo_quartz_surface_create(cformat, width, height);
  26
  27   mCGContext = cairo_quartz_surface_get_cg_context(surf);
  28
  29   CGContextRetain(mCGContext);
  30
  31   Init(surf);
  32   if (mSurfaceValid) {
  33     RecordMemoryUsed(mSize.height * 4 + sizeof(gfxQuartzSurface));
  34   }
  35 }
  36
  37 gfxQuartzSurface::gfxQuartzSurface(CGContextRef context,
  38                                    const mozilla::gfx::IntSize& size)
  39     : mCGContext(context), mSize(size) {
  40   if (!mozilla::gfx::Factory::CheckSurfaceSize(size)) MakeInvalid();
  41
  42   unsigned int width = static_cast<unsigned int>(mSize.width);
  43   unsigned int height = static_cast<unsigned int>(mSize.height);
  44
  45   cairo_surface_t* surf =
  46       cairo_quartz_surface_create_for_cg_context(context, width, height);
  47
  48   CGContextRetain(mCGContext);
  49
  50   Init(surf);
  51   if (mSurfaceValid) {
  52     RecordMemoryUsed(mSize.height * 4 + sizeof(gfxQuartzSurface));
  53   }
  54 }
  55
  56 gfxQuartzSurface::gfxQuartzSurface(cairo_surface_t* csurf,
  57                                    const mozilla::gfx::IntSize& aSize)
  58     : mSize(aSize) {
  59   mCGContext = cairo_quartz_surface_get_cg_context(csurf);
  60   CGContextRetain(mCGContext);
  61
  62   Init(csurf, true);
  63 }
  64
  65 already_AddRefed<gfxImageSurface> gfxQuartzSurface::GetAsImageSurface() {
  66   cairo_surface_t* surface = cairo_quartz_surface_get_image(mSurface);
  67   if (!surface || cairo_surface_status(surface)) return nullptr;
  68
  69   RefPtr<gfxASurface> img = Wrap(surface);
  70
  71   // cairo_quartz_surface_get_image returns a referenced image, and thebes
  72   // shares the refcounts of Cairo surfaces. However, Wrap also adds a
  73   // reference to the image. We need to remove one of these references
  74   // explicitly so we don't leak.
  75   img.get()->Release();
  76
  77   img->SetOpaqueRect(GetOpaqueRect());
  78
  79   return img.forget().downcast<gfxImageSurface>();
  80 }
  81
  82 gfxQuartzSurface::~gfxQuartzSurface() { CGContextRelease(mCGContext); }