gecko-dev/gfx/2d/DrawTargetCairo.cpp

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6.2 KiB
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "DrawTargetCairo.h"
#include "SourceSurfaceCairo.h"
namespace mozilla {
namespace gfx {
cairo_operator_t
GfxOpToCairoOp(CompositionOp op)
{
switch (op)
{
case OP_OVER:
return CAIRO_OPERATOR_OVER;
case OP_SOURCE:
return CAIRO_OPERATOR_SOURCE;
case OP_ADD:
return CAIRO_OPERATOR_ADD;
case OP_ATOP:
return CAIRO_OPERATOR_ATOP;
case OP_COUNT:
break;
}
return CAIRO_OPERATOR_OVER;
}
cairo_filter_t
GfxFilterToCairoFilter(Filter filter)
{
switch (filter)
{
case FILTER_LINEAR:
return CAIRO_FILTER_BILINEAR;
case FILTER_POINT:
return CAIRO_FILTER_NEAREST;
}
return CAIRO_FILTER_BILINEAR;
}
cairo_format_t
GfxFormatToCairoFormat(SurfaceFormat format)
{
switch (format)
{
case FORMAT_B8G8R8A8:
return CAIRO_FORMAT_ARGB32;
case FORMAT_B8G8R8X8:
return CAIRO_FORMAT_RGB24;
case FORMAT_A8:
return CAIRO_FORMAT_A8;
}
return CAIRO_FORMAT_ARGB32;
}
void
GfxMatrixToCairoMatrix(const Matrix& mat, cairo_matrix_t& retval)
{
cairo_matrix_init(&retval, mat._11, mat._12, mat._21, mat._22, mat._31, mat._32);
}
DrawTargetCairo::DrawTargetCairo()
: mContext(NULL)
{
}
DrawTargetCairo::~DrawTargetCairo()
{
cairo_destroy(mContext);
}
TemporaryRef<SourceSurface>
DrawTargetCairo::Snapshot()
{
return NULL;
}
void
DrawTargetCairo::Flush()
{
cairo_surface_t* surf = cairo_get_target(mContext);
cairo_surface_flush(surf);
}
void
DrawTargetCairo::DrawSurface(SourceSurface *aSurface,
const Rect &aDest,
const Rect &aSource,
const DrawSurfaceOptions &aSurfOptions,
const DrawOptions &aOptions)
{
float sx = aSource.Width() / aDest.Width();
float sy = aSource.Height() / aDest.Height();
cairo_matrix_t src_mat;
cairo_matrix_init_scale(&src_mat, sx, sy);
cairo_matrix_translate(&src_mat, -aSource.X(), -aSource.Y());
cairo_surface_t* surf = NULL;
if (aSurface->GetType() == SURFACE_CAIRO) {
surf = static_cast<SourceSurfaceCairo*>(aSurface)->GetSurface();
}
cairo_pattern_t* pat = cairo_pattern_create_for_surface(surf);
cairo_pattern_set_matrix(pat, &src_mat);
cairo_pattern_set_filter(pat, GfxFilterToCairoFilter(aSurfOptions.mFilter));
cairo_set_operator(mContext, GfxOpToCairoOp(aOptions.mCompositionOp));
cairo_rectangle(mContext, aDest.X(), aDest.Y(),
aDest.Width(), aDest.Height());
cairo_fill(mContext);
cairo_pattern_destroy(pat);
}
void
DrawTargetCairo::FillRect(const Rect &aRect,
const Pattern &aPattern,
const DrawOptions &aOptions)
{
cairo_new_path(mContext);
cairo_rectangle(mContext, aRect.x, aRect.y, aRect.Width(), aRect.Height());
cairo_set_operator(mContext, GfxOpToCairoOp(aOptions.mCompositionOp));
if (aPattern.GetType() == PATTERN_COLOR) {
Color color = static_cast<const ColorPattern&>(aPattern).mColor;
cairo_set_source_rgba(mContext, color.r, color.g,
color.b, color.a);
}
cairo_fill(mContext);
}
TemporaryRef<SourceSurface>
DrawTargetCairo::CreateSourceSurfaceFromData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat) const
{
cairo_surface_t* surf = cairo_image_surface_create_for_data(aData,
GfxFormatToCairoFormat(aFormat),
aSize.width,
aSize.height,
aStride);
RefPtr<SourceSurfaceCairo> source_surf = new SourceSurfaceCairo();
source_surf->InitFromSurface(surf, aSize, aFormat);
cairo_surface_destroy(surf);
return source_surf;
}
TemporaryRef<SourceSurface>
DrawTargetCairo::OptimizeSourceSurface(SourceSurface *aSurface) const
{
return NULL;
}
TemporaryRef<SourceSurface>
DrawTargetCairo::CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
{
return NULL;
}
bool
DrawTargetCairo::Init(cairo_surface_t* aSurface)
{
mContext = cairo_create(aSurface);
return true;
}
void
DrawTargetCairo::SetTransform(const Matrix& aTransform)
{
cairo_matrix_t mat;
GfxMatrixToCairoMatrix(aTransform, mat);
cairo_set_matrix(mContext, &mat);
mTransform = aTransform;
}
}
}