Quelle SourceSurfaceCairo.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "SourceSurfaceCairo.h"
#include "DrawTargetCairo.h"
#include "HelpersCairo.h"
#include "DataSourceSurfaceWrapper.h"

#include "cairo.h"

namespace mozilla {
namespace gfx {

static SurfaceFormat CairoFormatToSurfaceFormat(cairo_format_t format) {
  switch (format) {
    case CAIRO_FORMAT_ARGB32:
      return SurfaceFormat::B8G8R8A8;
    case CAIRO_FORMAT_RGB24:
      return SurfaceFormat::B8G8R8X8;
    case CAIRO_FORMAT_RGB16_565:
      return SurfaceFormat::R5G6B5_UINT16;
    case CAIRO_FORMAT_A8:
      return SurfaceFormat::A8;
    default:
      return SurfaceFormat::B8G8R8A8;
  }
}

SourceSurfaceCairo::SourceSurfaceCairo(
    cairo_surface_t* aSurface, const IntSize& aSize,
    const SurfaceFormat& aFormat, DrawTargetCairo* aDrawTarget /* = nullptr */)
    : mSize(aSize),
      mFormat(aFormat),
      mSurface(aSurface),
      mDrawTarget(aDrawTarget) {
  cairo_surface_reference(mSurface);
}

SourceSurfaceCairo::~SourceSurfaceCairo() { cairo_surface_destroy(mSurface); }

IntSize SourceSurfaceCairo::GetSize() const { return mSize; }

SurfaceFormat SourceSurfaceCairo::GetFormat() const { return mFormat; }

already_AddRefed<DataSourceSurface> SourceSurfaceCairo::GetDataSurface() {
  RefPtr<DataSourceSurface> dataSurf;

  if (cairo_surface_get_type(mSurface) == CAIRO_SURFACE_TYPE_IMAGE) {
    dataSurf = new DataSourceSurfaceCairo(mSurface);
  } else {
    cairo_surface_t* imageSurf = cairo_image_surface_create(
        GfxFormatToCairoFormat(mFormat), mSize.width, mSize.height);

    // Fill the new image surface with the contents of our surface.
    cairo_t* ctx = cairo_create(imageSurf);
    cairo_set_source_surface(ctx, mSurface, 0, 0);
    cairo_paint(ctx);
    cairo_destroy(ctx);

    dataSurf = new DataSourceSurfaceCairo(imageSurf);
    cairo_surface_destroy(imageSurf);
  }

  // We also need to make sure that the returned surface has
  // surface->GetType() == SurfaceType::DATA.
  return MakeAndAddRef<DataSourceSurfaceWrapper>(dataSurf);
}

cairo_surface_t* SourceSurfaceCairo::GetSurface() const { return mSurface; }

void SourceSurfaceCairo::DrawTargetWillChange() {
  if (mDrawTarget) {
    mDrawTarget = nullptr;

    // We're about to lose our version of the surface, so make a copy of it.
    cairo_surface_t* surface = cairo_surface_create_similar(
        mSurface, GfxFormatToCairoContent(mFormat), mSize.width, mSize.height);
    cairo_t* ctx = cairo_create(surface);
    cairo_pattern_t* pat = cairo_pattern_create_for_surface(mSurface);
    cairo_set_source(ctx, pat);
    cairo_paint(ctx);
    cairo_destroy(ctx);
    cairo_pattern_destroy(pat);

    // Swap in this new surface.
    cairo_surface_destroy(mSurface);
    mSurface = surface;
  }
}

DataSourceSurfaceCairo::DataSourceSurfaceCairo(cairo_surface_t* imageSurf)
    : mImageSurface(imageSurf) {
  cairo_surface_reference(mImageSurface);
}

DataSourceSurfaceCairo::~DataSourceSurfaceCairo() {
  cairo_surface_destroy(mImageSurface);
}

unsigned char* DataSourceSurfaceCairo::GetData() {
  return cairo_image_surface_get_data(mImageSurface);
}

int32_t DataSourceSurfaceCairo::Stride() {
  return cairo_image_surface_get_stride(mImageSurface);
}

IntSize DataSourceSurfaceCairo::GetSize() const {
  IntSize size;
  size.width = cairo_image_surface_get_width(mImageSurface);
  size.height = cairo_image_surface_get_height(mImageSurface);

  return size;
}

SurfaceFormat DataSourceSurfaceCairo::GetFormat() const {
  return CairoFormatToSurfaceFormat(
      cairo_image_surface_get_format(mImageSurface));
}

cairo_surface_t* DataSourceSurfaceCairo::GetSurface() const {
  return mImageSurface;
}

}  // namespace gfx
}  // namespace mozilla

quality100%

¤ Dauer der Verarbeitung: 0.21 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.