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Bug 748116; refactor DrawTargetCairo::GfxPatternForPattern. r=roc

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This commit is contained in:
Nicholas Cameron 2012-07-24 22:18:40 +12:00
parent 62f769d3a5
commit eebed30e10
1 changed files with 46 additions and 60 deletions
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106
gfx/2d/DrawTargetCairo.cpp
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@ -118,6 +118,51 @@ PatternIsCompatible(const Pattern& aPattern)
}
}
static cairo_user_data_key_t surfaceDataKey;
void
ReleaseData(void* aData)
{
static_cast<DataSourceSurface*>(aData)->Release();
}
/**
* Returns cairo surface for the given SourceSurface.
* If possible, it will use the cairo_surface associated with aSurface,
* otherwise, it will create a new cairo_surface.
* In either case, the caller must call cairo_surface_destroy on the
* result when it is done with it.
*/
cairo_surface_t*
GetCairoSurfaceForSourceSurface(SourceSurface *aSurface)
{
if (aSurface->GetType() == SURFACE_CAIRO) {
cairo_surface_t* surf = static_cast<SourceSurfaceCairo*>(aSurface)->GetSurface();
cairo_surface_reference(surf);
return surf;
}
if (aSurface->GetType() == SURFACE_CAIRO_IMAGE) {
cairo_surface_t* surf =
static_cast<const DataSourceSurfaceCairo*>(aSurface)->GetSurface();
cairo_surface_reference(surf);
return surf;
}
RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
cairo_surface_t* surf =
cairo_image_surface_create_for_data(data->GetData(),
GfxFormatToCairoFormat(data->GetFormat()),
data->GetSize().width,
data->GetSize().height,
data->Stride());
cairo_surface_set_user_data(surf,
&surfaceDataKey,
data.forget().drop(),
ReleaseData);
return surf;
}
// Never returns NULL. As such, you must always pass in Cairo-compatible
// patterns, most notably gradients with a GradientStopCairo.
// The pattern returned must have cairo_pattern_destroy() called on it by the
@ -142,28 +187,7 @@ GfxPatternToCairoPattern(const Pattern& aPattern, Float aAlpha)
case PATTERN_SURFACE:
{
const SurfacePattern& pattern = static_cast<const SurfacePattern&>(aPattern);
cairo_surface_t* surf;
// After this block, |surf| always has an extra cairo reference to be
// destroyed. This makes creating new surfaces or reusing old ones more
// uniform.
if (pattern.mSurface->GetType() == SURFACE_CAIRO) {
const SourceSurfaceCairo* source = static_cast<const SourceSurfaceCairo*>(pattern.mSurface.get());
surf = source->GetSurface();
cairo_surface_reference(surf);
} else if (pattern.mSurface->GetType() == SURFACE_CAIRO_IMAGE) {
const DataSourceSurfaceCairo* source =
static_cast<const DataSourceSurfaceCairo*>(pattern.mSurface.get());
surf = source->GetSurface();
cairo_surface_reference(surf);
} else {
RefPtr<DataSourceSurface> source = pattern.mSurface->GetDataSurface();
surf = cairo_image_surface_create_for_data(source->GetData(),
GfxFormatToCairoFormat(source->GetFormat()),
source->GetSize().width,
source->GetSize().height,
source->Stride());
}
cairo_surface_t* surf = GetCairoSurfaceForSourceSurface(pattern.mSurface);
pat = cairo_pattern_create_for_surface(surf);
cairo_pattern_set_filter(pat, GfxFilterToCairoFilter(pattern.mFilter));
@ -298,44 +322,6 @@ DrawTargetCairo::PrepareForDrawing(cairo_t* aContext, const Path* aPath /* = NUL
WillChange(aPath);
}
static cairo_user_data_key_t surfaceDataKey;
void
ReleaseData(void* aData)
{
static_cast<DataSourceSurface*>(aData)->Release();
}
/**
* Returns cairo surface for the given SourceSurface.
* If possible, it will use the cairo_surface associated with aSurface,
* otherwise, it will create a new cairo_surface.
* In either case, the caller must call cairo_surface_destroy on the
* result when it is done with it.
*/
cairo_surface_t*
GetCairoSurfaceForSourceSurface(SourceSurface *aSurface)
{
if (aSurface->GetType() == SURFACE_CAIRO) {
cairo_surface_t* surf = static_cast<SourceSurfaceCairo*>(aSurface)->GetSurface();
cairo_surface_reference(surf);
return surf;
} else {
RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
cairo_surface_t* surf =
cairo_image_surface_create_for_data(data->GetData(),
GfxFormatToCairoFormat(data->GetFormat()),
data->GetSize().width,
data->GetSize().height,
data->Stride());
cairo_surface_set_user_data(surf,
&surfaceDataKey,
data.forget(),
ReleaseData);
return surf;
}
}
void
DrawTargetCairo::DrawSurface(SourceSurface *aSurface,
const Rect &aDest,