michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "SourceSurfaceCairo.h"
michael@0: #include "DrawTargetCairo.h"
michael@0: #include "HelpersCairo.h"
michael@0: #include "DataSourceSurfaceWrapper.h"
michael@0: 
michael@0: #include "cairo.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: static SurfaceFormat
michael@0: CairoFormatToSurfaceFormat(cairo_format_t format)
michael@0: {
michael@0:   switch (format)
michael@0:   {
michael@0:     case CAIRO_FORMAT_ARGB32:
michael@0:       return SurfaceFormat::B8G8R8A8;
michael@0:     case CAIRO_FORMAT_RGB24:
michael@0:       return SurfaceFormat::B8G8R8X8;
michael@0:     case CAIRO_FORMAT_A8:
michael@0:       return SurfaceFormat::A8;
michael@0:     default:
michael@0:       return SurfaceFormat::B8G8R8A8;
michael@0:   }
michael@0: }
michael@0: 
michael@0: SourceSurfaceCairo::SourceSurfaceCairo(cairo_surface_t* aSurface,
michael@0:                                        const IntSize& aSize,
michael@0:                                        const SurfaceFormat& aFormat,
michael@0:                                        DrawTargetCairo* aDrawTarget /* = nullptr */)
michael@0:  : mSize(aSize)
michael@0:  , mFormat(aFormat)
michael@0:  , mSurface(aSurface)
michael@0:  , mDrawTarget(aDrawTarget)
michael@0: {
michael@0:   cairo_surface_reference(mSurface);
michael@0: }
michael@0: 
michael@0: SourceSurfaceCairo::~SourceSurfaceCairo()
michael@0: {
michael@0:   cairo_surface_destroy(mSurface);
michael@0: }
michael@0: 
michael@0: IntSize
michael@0: SourceSurfaceCairo::GetSize() const
michael@0: {
michael@0:   return mSize;
michael@0: }
michael@0: 
michael@0: SurfaceFormat
michael@0: SourceSurfaceCairo::GetFormat() const
michael@0: {
michael@0:   return mFormat;
michael@0: }
michael@0: 
michael@0: TemporaryRef<DataSourceSurface>
michael@0: SourceSurfaceCairo::GetDataSurface()
michael@0: {
michael@0:   RefPtr<DataSourceSurface> dataSurf;
michael@0: 
michael@0:   if (cairo_surface_get_type(mSurface) == CAIRO_SURFACE_TYPE_IMAGE) {
michael@0:     dataSurf = new DataSourceSurfaceCairo(mSurface);
michael@0:   } else {
michael@0:     cairo_surface_t* imageSurf = cairo_image_surface_create(GfxFormatToCairoFormat(mFormat),
michael@0:                                                             mSize.width, mSize.height);
michael@0: 
michael@0:     // Fill the new image surface with the contents of our surface.
michael@0:     cairo_t* ctx = cairo_create(imageSurf);
michael@0:     cairo_set_source_surface(ctx, mSurface, 0, 0);
michael@0:     cairo_paint(ctx);
michael@0:     cairo_destroy(ctx);
michael@0: 
michael@0:     dataSurf = new DataSourceSurfaceCairo(imageSurf);
michael@0:     cairo_surface_destroy(imageSurf);
michael@0:   }
michael@0: 
michael@0:   // We also need to make sure that the returned surface has
michael@0:   // surface->GetType() == SurfaceType::DATA.
michael@0:   dataSurf = new DataSourceSurfaceWrapper(dataSurf);
michael@0: 
michael@0:   return dataSurf;
michael@0: }
michael@0: 
michael@0: cairo_surface_t*
michael@0: SourceSurfaceCairo::GetSurface() const
michael@0: {
michael@0:   return mSurface;
michael@0: }
michael@0: 
michael@0: void
michael@0: SourceSurfaceCairo::DrawTargetWillChange()
michael@0: {
michael@0:   if (mDrawTarget) {
michael@0:     mDrawTarget = nullptr;
michael@0: 
michael@0:     // We're about to lose our version of the surface, so make a copy of it.
michael@0:     cairo_surface_t* surface = cairo_surface_create_similar(mSurface,
michael@0:                                                             GfxFormatToCairoContent(mFormat),
michael@0:                                                             mSize.width, mSize.height);
michael@0:     cairo_t* ctx = cairo_create(surface);
michael@0:     cairo_pattern_t* pat = cairo_pattern_create_for_surface(mSurface);
michael@0:     cairo_set_source(ctx, pat);
michael@0:     cairo_paint(ctx);
michael@0:     cairo_destroy(ctx);
michael@0:     cairo_pattern_destroy(pat);
michael@0: 
michael@0:     // Swap in this new surface.
michael@0:     cairo_surface_destroy(mSurface);
michael@0:     mSurface = surface;
michael@0:   }
michael@0: }
michael@0: 
michael@0: DataSourceSurfaceCairo::DataSourceSurfaceCairo(cairo_surface_t* imageSurf)
michael@0:  : mImageSurface(imageSurf)
michael@0: {
michael@0:   cairo_surface_reference(mImageSurface);
michael@0: }
michael@0: 
michael@0: DataSourceSurfaceCairo::~DataSourceSurfaceCairo()
michael@0: {
michael@0:   cairo_surface_destroy(mImageSurface);
michael@0: }
michael@0: 
michael@0: unsigned char *
michael@0: DataSourceSurfaceCairo::GetData()
michael@0: {
michael@0:   return cairo_image_surface_get_data(mImageSurface);
michael@0: }
michael@0: 
michael@0: int32_t
michael@0: DataSourceSurfaceCairo::Stride()
michael@0: {
michael@0:   return cairo_image_surface_get_stride(mImageSurface);
michael@0: }
michael@0: 
michael@0: IntSize
michael@0: DataSourceSurfaceCairo::GetSize() const
michael@0: {
michael@0:   IntSize size;
michael@0:   size.width = cairo_image_surface_get_width(mImageSurface);
michael@0:   size.height = cairo_image_surface_get_height(mImageSurface);
michael@0: 
michael@0:   return size;
michael@0: }
michael@0: 
michael@0: SurfaceFormat
michael@0: DataSourceSurfaceCairo::GetFormat() const
michael@0: {
michael@0:   return CairoFormatToSurfaceFormat(cairo_image_surface_get_format(mImageSurface));
michael@0: }
michael@0: 
michael@0: cairo_surface_t*
michael@0: DataSourceSurfaceCairo::GetSurface() const
michael@0: {
michael@0:   return mImageSurface;
michael@0: }
michael@0: 
michael@0: }
michael@0: }