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       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 "SourceSurfaceCairo.h"
       7             : #include "DrawTargetCairo.h"
       8             : #include "HelpersCairo.h"
       9             : #include "DataSourceSurfaceWrapper.h"
      10             : 
      11             : #include "cairo.h"
      12             : 
      13             : namespace mozilla {
      14             : namespace gfx {
      15             : 
      16             : static SurfaceFormat
      17           0 : CairoFormatToSurfaceFormat(cairo_format_t format)
      18             : {
      19           0 :   switch (format)
      20             :   {
      21             :     case CAIRO_FORMAT_ARGB32:
      22           0 :       return SurfaceFormat::B8G8R8A8;
      23             :     case CAIRO_FORMAT_RGB24:
      24           0 :       return SurfaceFormat::B8G8R8X8;
      25             :     case CAIRO_FORMAT_RGB16_565:
      26           0 :       return SurfaceFormat::R5G6B5_UINT16;
      27             :     case CAIRO_FORMAT_A8:
      28           0 :       return SurfaceFormat::A8;
      29             :     default:
      30           0 :       return SurfaceFormat::B8G8R8A8;
      31             :   }
      32             : }
      33             : 
      34           0 : SourceSurfaceCairo::SourceSurfaceCairo(cairo_surface_t* aSurface,
      35             :                                        const IntSize& aSize,
      36             :                                        const SurfaceFormat& aFormat,
      37           0 :                                        DrawTargetCairo* aDrawTarget /* = nullptr */)
      38             :  : mSize(aSize)
      39           0 :  , mFormat(aFormat)
      40             :  , mSurface(aSurface)
      41           0 :  , mDrawTarget(aDrawTarget)
      42             : {
      43           0 :   cairo_surface_reference(mSurface);
      44           0 : }
      45             : 
      46           0 : SourceSurfaceCairo::~SourceSurfaceCairo()
      47             : {
      48           0 :   cairo_surface_destroy(mSurface);
      49           0 : }
      50             : 
      51             : IntSize
      52           0 : SourceSurfaceCairo::GetSize() const
      53             : {
      54           0 :   return mSize;
      55             : }
      56             : 
      57             : SurfaceFormat
      58           0 : SourceSurfaceCairo::GetFormat() const
      59             : {
      60           0 :   return mFormat;
      61             : }
      62             : 
      63             : already_AddRefed<DataSourceSurface>
      64           0 : SourceSurfaceCairo::GetDataSurface()
      65             : {
      66           0 :   RefPtr<DataSourceSurface> dataSurf;
      67             : 
      68           0 :   if (cairo_surface_get_type(mSurface) == CAIRO_SURFACE_TYPE_IMAGE) {
      69           0 :     dataSurf = new DataSourceSurfaceCairo(mSurface);
      70             :   } else {
      71           0 :     cairo_surface_t* imageSurf = cairo_image_surface_create(GfxFormatToCairoFormat(mFormat),
      72           0 :                                                             mSize.width, mSize.height);
      73             : 
      74             :     // Fill the new image surface with the contents of our surface.
      75           0 :     cairo_t* ctx = cairo_create(imageSurf);
      76           0 :     cairo_set_source_surface(ctx, mSurface, 0, 0);
      77           0 :     cairo_paint(ctx);
      78           0 :     cairo_destroy(ctx);
      79             : 
      80           0 :     dataSurf = new DataSourceSurfaceCairo(imageSurf);
      81           0 :     cairo_surface_destroy(imageSurf);
      82             :   }
      83             : 
      84             :   // We also need to make sure that the returned surface has
      85             :   // surface->GetType() == SurfaceType::DATA.
      86           0 :   return MakeAndAddRef<DataSourceSurfaceWrapper>(dataSurf);
      87             : }
      88             : 
      89             : cairo_surface_t*
      90           0 : SourceSurfaceCairo::GetSurface() const
      91             : {
      92           0 :   return mSurface;
      93             : }
      94             : 
      95             : void
      96           0 : SourceSurfaceCairo::DrawTargetWillChange()
      97             : {
      98           0 :   if (mDrawTarget) {
      99           0 :     mDrawTarget = nullptr;
     100             : 
     101             :     // We're about to lose our version of the surface, so make a copy of it.
     102           0 :     cairo_surface_t* surface = cairo_surface_create_similar(mSurface,
     103             :                                                             GfxFormatToCairoContent(mFormat),
     104           0 :                                                             mSize.width, mSize.height);
     105           0 :     cairo_t* ctx = cairo_create(surface);
     106           0 :     cairo_pattern_t* pat = cairo_pattern_create_for_surface(mSurface);
     107           0 :     cairo_set_source(ctx, pat);
     108           0 :     cairo_paint(ctx);
     109           0 :     cairo_destroy(ctx);
     110           0 :     cairo_pattern_destroy(pat);
     111             : 
     112             :     // Swap in this new surface.
     113           0 :     cairo_surface_destroy(mSurface);
     114           0 :     mSurface = surface;
     115             :   }
     116           0 : }
     117             : 
     118           0 : DataSourceSurfaceCairo::DataSourceSurfaceCairo(cairo_surface_t* imageSurf)
     119           0 :  : mImageSurface(imageSurf)
     120             : {
     121           0 :   cairo_surface_reference(mImageSurface);
     122           0 : }
     123             : 
     124           0 : DataSourceSurfaceCairo::~DataSourceSurfaceCairo()
     125             : {
     126           0 :   cairo_surface_destroy(mImageSurface);
     127           0 : }
     128             : 
     129             : unsigned char *
     130           0 : DataSourceSurfaceCairo::GetData()
     131             : {
     132           0 :   return cairo_image_surface_get_data(mImageSurface);
     133             : }
     134             : 
     135             : int32_t
     136           0 : DataSourceSurfaceCairo::Stride()
     137             : {
     138           0 :   return cairo_image_surface_get_stride(mImageSurface);
     139             : }
     140             : 
     141             : IntSize
     142           0 : DataSourceSurfaceCairo::GetSize() const
     143             : {
     144           0 :   IntSize size;
     145           0 :   size.width = cairo_image_surface_get_width(mImageSurface);
     146           0 :   size.height = cairo_image_surface_get_height(mImageSurface);
     147             : 
     148           0 :   return size;
     149             : }
     150             : 
     151             : SurfaceFormat
     152           0 : DataSourceSurfaceCairo::GetFormat() const
     153             : {
     154           0 :   return CairoFormatToSurfaceFormat(cairo_image_surface_get_format(mImageSurface));
     155             : }
     156             : 
     157             : cairo_surface_t*
     158           0 : DataSourceSurfaceCairo::GetSurface() const
     159             : {
     160           0 :   return mImageSurface;
     161             : }
     162             : 
     163             : } // namespace gfx
     164             : } // namespace mozilla