gecko-dev/gfx/thebes/gfxPattern.cpp
2012-02-04 07:22:47 -05:00

418 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** 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) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Stuart Parmenter <stuart@mozilla.com>
*
* 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 "gfxTypes.h"
#include "gfxPattern.h"
#include "gfxASurface.h"
#include "gfxPlatform.h"
#include "cairo.h"
#include <vector>
using namespace mozilla::gfx;
gfxPattern::gfxPattern(cairo_pattern_t *aPattern)
: mGfxPattern(NULL)
{
mPattern = cairo_pattern_reference(aPattern);
}
gfxPattern::gfxPattern(const gfxRGBA& aColor)
: mGfxPattern(NULL)
{
mPattern = cairo_pattern_create_rgba(aColor.r, aColor.g, aColor.b, aColor.a);
}
// from another surface
gfxPattern::gfxPattern(gfxASurface *surface)
: mGfxPattern(NULL)
{
mPattern = cairo_pattern_create_for_surface(surface->CairoSurface());
}
// linear
gfxPattern::gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1)
: mGfxPattern(NULL)
{
mPattern = cairo_pattern_create_linear(x0, y0, x1, y1);
}
// radial
gfxPattern::gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
gfxFloat cx1, gfxFloat cy1, gfxFloat radius1)
: mGfxPattern(NULL)
{
mPattern = cairo_pattern_create_radial(cx0, cy0, radius0,
cx1, cy1, radius1);
}
// Azure
gfxPattern::gfxPattern(SourceSurface *aSurface, const Matrix &aTransform)
: mPattern(NULL)
, mGfxPattern(NULL)
, mSourceSurface(aSurface)
, mTransform(aTransform)
{
}
gfxPattern::~gfxPattern()
{
cairo_pattern_destroy(mPattern);
if (mGfxPattern) {
mGfxPattern->~Pattern();
}
}
cairo_pattern_t *
gfxPattern::CairoPattern()
{
return mPattern;
}
void
gfxPattern::AddColorStop(gfxFloat offset, const gfxRGBA& c)
{
if (mPattern) {
mStops = NULL;
if (gfxPlatform::GetCMSMode() == eCMSMode_All) {
gfxRGBA cms;
gfxPlatform::TransformPixel(c, cms, gfxPlatform::GetCMSRGBTransform());
// Use the original alpha to avoid unnecessary float->byte->float
// conversion errors
cairo_pattern_add_color_stop_rgba(mPattern, offset,
cms.r, cms.g, cms.b, c.a);
}
else
cairo_pattern_add_color_stop_rgba(mPattern, offset, c.r, c.g, c.b, c.a);
}
}
void
gfxPattern::SetMatrix(const gfxMatrix& matrix)
{
if (mPattern) {
cairo_matrix_t mat = *reinterpret_cast<const cairo_matrix_t*>(&matrix);
cairo_pattern_set_matrix(mPattern, &mat);
} else {
mTransform = ToMatrix(matrix);
}
}
gfxMatrix
gfxPattern::GetMatrix() const
{
if (mPattern) {
cairo_matrix_t mat;
cairo_pattern_get_matrix(mPattern, &mat);
return gfxMatrix(*reinterpret_cast<gfxMatrix*>(&mat));
} else {
return ThebesMatrix(mTransform);
}
}
Pattern*
gfxPattern::GetPattern(mozilla::gfx::DrawTarget *aTarget)
{
if (!mPattern) {
mGfxPattern = new (mSurfacePattern.addr())
SurfacePattern(mSourceSurface, EXTEND_CLAMP, mTransform);
return mGfxPattern;
}
GraphicsExtend extend = (GraphicsExtend)cairo_pattern_get_extend(mPattern);
switch (cairo_pattern_get_type(mPattern)) {
case CAIRO_PATTERN_TYPE_SURFACE:
{
GraphicsFilter filter = (GraphicsFilter)cairo_pattern_get_filter(mPattern);
cairo_matrix_t mat;
cairo_pattern_get_matrix(mPattern, &mat);
gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
cairo_surface_t *surf = NULL;
cairo_pattern_get_surface(mPattern, &surf);
if (!mSourceSurface) {
nsRefPtr<gfxASurface> gfxSurf = gfxASurface::Wrap(surf);
mSourceSurface =
gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(aTarget, gfxSurf);
}
if (mSourceSurface) {
Matrix newMat = ToMatrix(matrix);
newMat.Invert();
double x, y;
cairo_surface_get_device_offset(surf, &x, &y);
newMat.Translate(-x, -y);
mGfxPattern = new (mSurfacePattern.addr())
SurfacePattern(mSourceSurface, ToExtendMode(extend), newMat, ToFilter(filter));
return mGfxPattern;
}
break;
}
case CAIRO_PATTERN_TYPE_LINEAR:
{
double x1, y1, x2, y2;
cairo_pattern_get_linear_points(mPattern, &x1, &y1, &x2, &y2);
if (!mStops) {
int count = 0;
cairo_pattern_get_color_stop_count(mPattern, &count);
std::vector<GradientStop> stops;
for (int i = 0; i < count; i++) {
GradientStop stop;
double r, g, b, a, offset;
cairo_pattern_get_color_stop_rgba(mPattern, i, &offset, &r, &g, &b, &a);
stop.offset = offset;
stop.color = Color(Float(r), Float(g), Float(b), Float(a));
stops.push_back(stop);
}
mStops = aTarget->CreateGradientStops(&stops.front(), count, ToExtendMode(extend));
}
if (mStops) {
cairo_matrix_t mat;
cairo_pattern_get_matrix(mPattern, &mat);
gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
Matrix newMat = ToMatrix(matrix);
newMat.Invert();
mGfxPattern = new (mLinearGradientPattern.addr())
LinearGradientPattern(Point(x1, y1), Point(x2, y2), mStops, newMat);
return mGfxPattern;
}
break;
}
case CAIRO_PATTERN_TYPE_RADIAL:
{
if (!mStops) {
int count = 0;
cairo_pattern_get_color_stop_count(mPattern, &count);
std::vector<GradientStop> stops;
for (int i = 0; i < count; i++) {
GradientStop stop;
double r, g, b, a, offset;
cairo_pattern_get_color_stop_rgba(mPattern, i, &offset, &r, &g, &b, &a);
stop.offset = offset;
stop.color = Color(Float(r), Float(g), Float(b), Float(a));
stops.push_back(stop);
}
mStops = aTarget->CreateGradientStops(&stops.front(), count, ToExtendMode(extend));
}
if (mStops) {
cairo_matrix_t mat;
cairo_pattern_get_matrix(mPattern, &mat);
gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
Matrix newMat = ToMatrix(matrix);
newMat.Invert();
double x1, y1, x2, y2, r1, r2;
cairo_pattern_get_radial_circles(mPattern, &x1, &y1, &r1, &x2, &y2, &r2);
mGfxPattern = new (mRadialGradientPattern.addr())
RadialGradientPattern(Point(x1, y1), Point(x2, y2), r1, r2, mStops, newMat);
return mGfxPattern;
}
break;
}
default:
/* Reassure the compiler we are handling all the enum values. */
break;
}
new (mColorPattern.addr()) ColorPattern(Color(0, 0, 0, 0));
return mColorPattern.addr();
}
void
gfxPattern::SetExtend(GraphicsExtend extend)
{
if (mPattern) {
mStops = NULL;
if (extend == EXTEND_PAD_EDGE) {
if (cairo_pattern_get_type(mPattern) == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_surface_t *surf = NULL;
cairo_pattern_get_surface (mPattern, &surf);
if (surf) {
switch (cairo_surface_get_type(surf)) {
case CAIRO_SURFACE_TYPE_WIN32_PRINTING:
case CAIRO_SURFACE_TYPE_QUARTZ:
extend = EXTEND_NONE;
break;
case CAIRO_SURFACE_TYPE_WIN32:
case CAIRO_SURFACE_TYPE_XLIB:
default:
extend = EXTEND_PAD;
break;
}
}
}
// if something went wrong, or not a surface pattern, use PAD
if (extend == EXTEND_PAD_EDGE)
extend = EXTEND_PAD;
}
cairo_pattern_set_extend(mPattern, (cairo_extend_t)extend);
} else {
// This is always a surface pattern and will default to EXTEND_PAD
// for EXTEND_PAD_EDGE.
mExtend = ToExtendMode(extend);
}
}
bool
gfxPattern::IsOpaque()
{
if (mPattern) {
switch (cairo_pattern_get_type(mPattern)) {
case CAIRO_PATTERN_TYPE_SURFACE:
{
cairo_surface_t *surf = NULL;
cairo_pattern_get_surface(mPattern, &surf);
if (cairo_surface_get_content(surf) == CAIRO_CONTENT_COLOR) {
return true;
}
}
default:
return false;
}
}
if (mSourceSurface->GetFormat() == FORMAT_B8G8R8X8) {
return true;
}
return false;
}
gfxPattern::GraphicsExtend
gfxPattern::Extend() const
{
if (mPattern) {
return (GraphicsExtend)cairo_pattern_get_extend(mPattern);
} else {
return ThebesExtend(mExtend);
}
}
void
gfxPattern::SetFilter(GraphicsFilter filter)
{
if (mPattern) {
cairo_pattern_set_filter(mPattern, (cairo_filter_t)filter);
} else {
mFilter = ToFilter(filter);
}
}
gfxPattern::GraphicsFilter
gfxPattern::Filter() const
{
if (mPattern) {
return (GraphicsFilter)cairo_pattern_get_filter(mPattern);
} else {
return ThebesFilter(mFilter);
}
}
bool
gfxPattern::GetSolidColor(gfxRGBA& aColor)
{
return cairo_pattern_get_rgba(mPattern,
&aColor.r,
&aColor.g,
&aColor.b,
&aColor.a) == CAIRO_STATUS_SUCCESS;
}
already_AddRefed<gfxASurface>
gfxPattern::GetSurface()
{
if (mPattern) {
cairo_surface_t *surf = nsnull;
if (cairo_pattern_get_surface (mPattern, &surf) != CAIRO_STATUS_SUCCESS)
return nsnull;
return gfxASurface::Wrap(surf);
} else {
// We should never be trying to get the surface off an Azure gfx Pattern.
NS_ERROR("Attempt to get surface off an Azure gfxPattern!");
return NULL;
}
}
gfxPattern::GraphicsPatternType
gfxPattern::GetType() const
{
if (mPattern) {
return (GraphicsPatternType) cairo_pattern_get_type(mPattern);
} else {
// We should never be trying to get the type off an Azure gfx Pattern.
MOZ_ASSERT(0);
return PATTERN_SURFACE;
}
}
int
gfxPattern::CairoStatus()
{
if (mPattern) {
return cairo_pattern_status(mPattern);
} else {
// An Azure pattern as this point is never in error status.
return CAIRO_STATUS_SUCCESS;
}
}