зеркало из https://github.com/mozilla/gecko-dev.git
489 строки
13 KiB
C++
489 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxTypes.h"
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#include "gfxPattern.h"
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#include "gfxASurface.h"
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#include "gfxPlatform.h"
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#include "gfx2DGlue.h"
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#include "gfxGradientCache.h"
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#include "cairo.h"
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#include <vector>
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using namespace mozilla::gfx;
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gfxPattern::gfxPattern(cairo_pattern_t *aPattern)
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: mGfxPattern(nullptr)
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{
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mPattern = cairo_pattern_reference(aPattern);
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}
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gfxPattern::gfxPattern(const gfxRGBA& aColor)
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: mGfxPattern(nullptr)
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{
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mPattern = cairo_pattern_create_rgba(aColor.r, aColor.g, aColor.b, aColor.a);
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}
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// from another surface
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gfxPattern::gfxPattern(gfxASurface *surface)
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: mGfxPattern(nullptr)
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{
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mPattern = cairo_pattern_create_for_surface(surface->CairoSurface());
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}
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// linear
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gfxPattern::gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1)
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: mGfxPattern(nullptr)
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{
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mPattern = cairo_pattern_create_linear(x0, y0, x1, y1);
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}
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// radial
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gfxPattern::gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
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gfxFloat cx1, gfxFloat cy1, gfxFloat radius1)
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: mGfxPattern(nullptr)
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{
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mPattern = cairo_pattern_create_radial(cx0, cy0, radius0,
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cx1, cy1, radius1);
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}
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// Azure
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gfxPattern::gfxPattern(SourceSurface *aSurface, const Matrix &aTransform)
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: mPattern(nullptr)
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, mGfxPattern(nullptr)
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, mSourceSurface(aSurface)
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, mTransform(aTransform)
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, mExtend(EXTEND_NONE)
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{
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}
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gfxPattern::~gfxPattern()
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{
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cairo_pattern_destroy(mPattern);
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if (mGfxPattern) {
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mGfxPattern->~Pattern();
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}
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}
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cairo_pattern_t *
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gfxPattern::CairoPattern()
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{
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return mPattern;
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}
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void
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gfxPattern::AddColorStop(gfxFloat offset, const gfxRGBA& c)
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{
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if (mPattern) {
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mStops = nullptr;
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if (gfxPlatform::GetCMSMode() == eCMSMode_All) {
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gfxRGBA cms;
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qcms_transform *transform = gfxPlatform::GetCMSRGBTransform();
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if (transform)
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gfxPlatform::TransformPixel(c, cms, transform);
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// Use the original alpha to avoid unnecessary float->byte->float
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// conversion errors
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cairo_pattern_add_color_stop_rgba(mPattern, offset,
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cms.r, cms.g, cms.b, c.a);
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}
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else
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cairo_pattern_add_color_stop_rgba(mPattern, offset, c.r, c.g, c.b, c.a);
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}
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}
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void
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gfxPattern::SetColorStops(mozilla::RefPtr<mozilla::gfx::GradientStops> aStops)
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{
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mStops = aStops;
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}
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void
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gfxPattern::CacheColorStops(mozilla::gfx::DrawTarget *aDT)
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{
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if (mPattern) {
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mStops = nullptr;
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nsTArray<GradientStop> stops;
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int count = 0;
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cairo_pattern_get_color_stop_count(mPattern, &count);
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stops.SetLength(count);
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for (int n = 0; n < count; ++n) {
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double offset, r, g, b, a;
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cairo_pattern_get_color_stop_rgba(mPattern, n, &offset, &r, &g, &b, &a);
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stops[n].color = mozilla::gfx::Color(r, g, b, a);
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stops[n].offset = offset;
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}
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mStops = gfxGradientCache::GetOrCreateGradientStops(aDT,
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stops,
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(cairo_pattern_get_extend(mPattern) == CAIRO_EXTEND_REPEAT)
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? mozilla::gfx::ExtendMode::REPEAT
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: mozilla::gfx::ExtendMode::CLAMP);
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}
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}
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void
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gfxPattern::SetMatrix(const gfxMatrix& matrix)
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{
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if (mPattern) {
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cairo_matrix_t mat = *reinterpret_cast<const cairo_matrix_t*>(&matrix);
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cairo_pattern_set_matrix(mPattern, &mat);
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} else {
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mTransform = ToMatrix(matrix);
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// Cairo-pattern matrices specify the conversion from DrawTarget to pattern
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// space. Azure pattern matrices specify the conversion from pattern to
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// DrawTarget space.
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mTransform.Invert();
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}
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}
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gfxMatrix
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gfxPattern::GetMatrix() const
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{
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if (mPattern) {
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cairo_matrix_t mat;
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cairo_pattern_get_matrix(mPattern, &mat);
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return gfxMatrix(*reinterpret_cast<gfxMatrix*>(&mat));
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} else {
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// invert at the higher precision of gfxMatrix
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// cause we need to convert at some point anyways
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gfxMatrix mat = ThebesMatrix(mTransform);
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mat.Invert();
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return mat;
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}
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}
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gfxMatrix
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gfxPattern::GetInverseMatrix() const
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{
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if (mPattern) {
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cairo_matrix_t mat;
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cairo_pattern_get_matrix(mPattern, &mat);
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cairo_matrix_invert(&mat);
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return gfxMatrix(*reinterpret_cast<gfxMatrix*>(&mat));
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} else {
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return ThebesMatrix(mTransform);
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}
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}
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Pattern*
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gfxPattern::GetPattern(DrawTarget *aTarget, Matrix *aPatternTransform)
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{
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if (mGfxPattern) {
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mGfxPattern->~Pattern();
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mGfxPattern = nullptr;
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}
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if (!mPattern) {
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Matrix adjustedMatrix = mTransform;
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if (aPatternTransform)
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AdjustTransformForPattern(adjustedMatrix, aTarget->GetTransform(), aPatternTransform);
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mGfxPattern = new (mSurfacePattern.addr())
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SurfacePattern(mSourceSurface, ToExtendMode(mExtend), adjustedMatrix, mFilter);
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return mGfxPattern;
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}
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GraphicsExtend extend = (GraphicsExtend)cairo_pattern_get_extend(mPattern);
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switch (cairo_pattern_get_type(mPattern)) {
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case CAIRO_PATTERN_TYPE_SOLID:
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{
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double r, g, b, a;
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cairo_pattern_get_rgba(mPattern, &r, &g, &b, &a);
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new (mColorPattern.addr()) ColorPattern(Color(r, g, b, a));
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return mColorPattern.addr();
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}
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case CAIRO_PATTERN_TYPE_SURFACE:
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{
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GraphicsFilter filter = (GraphicsFilter)cairo_pattern_get_filter(mPattern);
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cairo_matrix_t mat;
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cairo_pattern_get_matrix(mPattern, &mat);
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gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
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cairo_surface_t *surf = nullptr;
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cairo_pattern_get_surface(mPattern, &surf);
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if (!mSourceSurface) {
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nsRefPtr<gfxASurface> gfxSurf = gfxASurface::Wrap(surf);
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// The underlying surface here will be kept around by the gfxPattern.
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// This function is intended to be used right away.
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mSourceSurface =
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gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(aTarget, gfxSurf);
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}
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if (mSourceSurface) {
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Matrix newMat = ToMatrix(matrix);
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AdjustTransformForPattern(newMat, aTarget->GetTransform(), aPatternTransform);
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double x, y;
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cairo_surface_get_device_offset(surf, &x, &y);
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newMat.Translate(-x, -y);
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mGfxPattern = new (mSurfacePattern.addr())
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SurfacePattern(mSourceSurface, ToExtendMode(extend), newMat, ToFilter(filter));
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return mGfxPattern;
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}
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break;
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}
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case CAIRO_PATTERN_TYPE_LINEAR:
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{
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double x1, y1, x2, y2;
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cairo_pattern_get_linear_points(mPattern, &x1, &y1, &x2, &y2);
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if (!mStops) {
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int count = 0;
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cairo_pattern_get_color_stop_count(mPattern, &count);
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std::vector<GradientStop> stops;
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for (int i = 0; i < count; i++) {
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GradientStop stop;
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double r, g, b, a, offset;
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cairo_pattern_get_color_stop_rgba(mPattern, i, &offset, &r, &g, &b, &a);
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stop.offset = offset;
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stop.color = Color(Float(r), Float(g), Float(b), Float(a));
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stops.push_back(stop);
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}
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mStops = aTarget->CreateGradientStops(&stops.front(), count, ToExtendMode(extend));
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}
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if (mStops) {
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cairo_matrix_t mat;
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cairo_pattern_get_matrix(mPattern, &mat);
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gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
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Matrix newMat = ToMatrix(matrix);
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AdjustTransformForPattern(newMat, aTarget->GetTransform(), aPatternTransform);
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mGfxPattern = new (mLinearGradientPattern.addr())
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LinearGradientPattern(Point(x1, y1), Point(x2, y2), mStops, newMat);
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return mGfxPattern;
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}
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break;
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}
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case CAIRO_PATTERN_TYPE_RADIAL:
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{
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if (!mStops) {
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int count = 0;
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cairo_pattern_get_color_stop_count(mPattern, &count);
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std::vector<GradientStop> stops;
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for (int i = 0; i < count; i++) {
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GradientStop stop;
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double r, g, b, a, offset;
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cairo_pattern_get_color_stop_rgba(mPattern, i, &offset, &r, &g, &b, &a);
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stop.offset = offset;
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stop.color = Color(Float(r), Float(g), Float(b), Float(a));
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stops.push_back(stop);
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}
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mStops = aTarget->CreateGradientStops(&stops.front(), count, ToExtendMode(extend));
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}
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if (mStops) {
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cairo_matrix_t mat;
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cairo_pattern_get_matrix(mPattern, &mat);
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gfxMatrix matrix(*reinterpret_cast<gfxMatrix*>(&mat));
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Matrix newMat = ToMatrix(matrix);
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AdjustTransformForPattern(newMat, aTarget->GetTransform(), aPatternTransform);
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double x1, y1, x2, y2, r1, r2;
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cairo_pattern_get_radial_circles(mPattern, &x1, &y1, &r1, &x2, &y2, &r2);
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mGfxPattern = new (mRadialGradientPattern.addr())
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RadialGradientPattern(Point(x1, y1), Point(x2, y2), r1, r2, mStops, newMat);
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return mGfxPattern;
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}
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break;
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}
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default:
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/* Reassure the compiler we are handling all the enum values. */
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break;
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}
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new (mColorPattern.addr()) ColorPattern(Color(0, 0, 0, 0));
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return mColorPattern.addr();
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}
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void
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gfxPattern::SetExtend(GraphicsExtend extend)
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{
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if (mPattern) {
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mStops = nullptr;
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if (extend == EXTEND_PAD_EDGE) {
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if (cairo_pattern_get_type(mPattern) == CAIRO_PATTERN_TYPE_SURFACE) {
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cairo_surface_t *surf = nullptr;
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cairo_pattern_get_surface (mPattern, &surf);
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if (surf) {
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switch (cairo_surface_get_type(surf)) {
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case CAIRO_SURFACE_TYPE_WIN32_PRINTING:
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case CAIRO_SURFACE_TYPE_QUARTZ:
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extend = EXTEND_NONE;
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break;
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case CAIRO_SURFACE_TYPE_WIN32:
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case CAIRO_SURFACE_TYPE_XLIB:
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default:
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extend = EXTEND_PAD;
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break;
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}
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}
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}
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// if something went wrong, or not a surface pattern, use PAD
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if (extend == EXTEND_PAD_EDGE)
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extend = EXTEND_PAD;
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}
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cairo_pattern_set_extend(mPattern, (cairo_extend_t)extend);
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} else {
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// This is always a surface pattern and will default to EXTEND_PAD
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// for EXTEND_PAD_EDGE.
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mExtend = extend;
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}
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}
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bool
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gfxPattern::IsOpaque()
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{
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if (mPattern) {
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switch (cairo_pattern_get_type(mPattern)) {
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case CAIRO_PATTERN_TYPE_SURFACE:
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{
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cairo_surface_t *surf = nullptr;
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cairo_pattern_get_surface(mPattern, &surf);
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if (cairo_surface_get_content(surf) == CAIRO_CONTENT_COLOR) {
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return true;
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}
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}
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default:
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return false;
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}
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}
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if (mSourceSurface->GetFormat() == SurfaceFormat::B8G8R8X8) {
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return true;
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}
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return false;
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}
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gfxPattern::GraphicsExtend
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gfxPattern::Extend() const
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{
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if (mPattern) {
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return (GraphicsExtend)cairo_pattern_get_extend(mPattern);
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} else {
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return mExtend;
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}
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}
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void
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gfxPattern::SetFilter(GraphicsFilter filter)
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{
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if (mPattern) {
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cairo_pattern_set_filter(mPattern, (cairo_filter_t)(int)filter);
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} else {
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mFilter = ToFilter(filter);
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}
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}
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GraphicsFilter
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gfxPattern::Filter() const
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{
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if (mPattern) {
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return (GraphicsFilter)cairo_pattern_get_filter(mPattern);
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} else {
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return ThebesFilter(mFilter);
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}
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}
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bool
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gfxPattern::GetSolidColor(gfxRGBA& aColor)
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{
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return cairo_pattern_get_rgba(mPattern,
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&aColor.r,
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&aColor.g,
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&aColor.b,
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&aColor.a) == CAIRO_STATUS_SUCCESS;
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}
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already_AddRefed<gfxASurface>
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gfxPattern::GetSurface()
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{
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if (mPattern) {
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cairo_surface_t *surf = nullptr;
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if (cairo_pattern_get_surface (mPattern, &surf) != CAIRO_STATUS_SUCCESS)
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return nullptr;
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return gfxASurface::Wrap(surf);
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} else {
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// We should never be trying to get the surface off an Azure gfx Pattern.
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NS_ERROR("Attempt to get surface off an Azure gfxPattern!");
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return nullptr;
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}
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}
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gfxPattern::GraphicsPatternType
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gfxPattern::GetType() const
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{
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if (mPattern) {
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return (GraphicsPatternType) cairo_pattern_get_type(mPattern);
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} else {
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// We should never be trying to get the type off an Azure gfx Pattern.
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MOZ_ASSERT(0);
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return PATTERN_SURFACE;
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}
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}
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int
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gfxPattern::CairoStatus()
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{
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if (mPattern) {
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return cairo_pattern_status(mPattern);
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} else {
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// An Azure pattern as this point is never in error status.
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return CAIRO_STATUS_SUCCESS;
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}
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}
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void
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gfxPattern::AdjustTransformForPattern(Matrix &aPatternTransform,
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const Matrix &aCurrentTransform,
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const Matrix *aOriginalTransform)
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{
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aPatternTransform.Invert();
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if (!aOriginalTransform) {
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// User space is unchanged, so to get from pattern space to user space,
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// just invert the cairo matrix.
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aPatternTransform.NudgeToIntegers();
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return;
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}
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// aPatternTransform now maps from pattern space to the user space defined
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// by *aOriginalTransform.
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Matrix mat = aCurrentTransform;
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mat.Invert();
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// mat maps from device space to current user space
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// First, transform from pattern space to original user space. Then transform
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// from original user space to device space. Then transform from
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// device space to current user space.
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aPatternTransform = aPatternTransform * *aOriginalTransform * mat;
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aPatternTransform.NudgeToIntegers();
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}
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