mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 04:05:49 +00:00
1401 lines
35 KiB
C++
1401 lines
35 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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#ifdef _MSC_VER
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#define _USE_MATH_DEFINES
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#endif
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#include <math.h>
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#include "mozilla/Alignment.h"
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#include "cairo.h"
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#include "gfxContext.h"
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#include "gfxColor.h"
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#include "gfxMatrix.h"
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#include "gfxUtils.h"
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#include "gfxASurface.h"
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#include "gfxPattern.h"
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#include "gfxPlatform.h"
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#include "gfxTeeSurface.h"
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#include "GeckoProfiler.h"
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#include "gfx2DGlue.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/gfx/DrawTargetTiled.h"
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#include <algorithm>
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#if CAIRO_HAS_DWRITE_FONT
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#include "gfxWindowsPlatform.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::gfx;
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UserDataKey gfxContext::sDontUseAsSourceKey;
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PatternFromState::operator mozilla::gfx::Pattern&()
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{
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gfxContext::AzureState &state = mContext->CurrentState();
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if (state.pattern) {
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return *state.pattern->GetPattern(mContext->mDT, state.patternTransformChanged ? &state.patternTransform : nullptr);
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}
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if (state.sourceSurface) {
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Matrix transform = state.surfTransform;
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if (state.patternTransformChanged) {
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Matrix mat = mContext->GetDTTransform();
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if (!mat.Invert()) {
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mPattern = new (mColorPattern.addr())
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ColorPattern(Color()); // transparent black to paint nothing
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return *mPattern;
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}
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transform = transform * state.patternTransform * mat;
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}
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mPattern = new (mSurfacePattern.addr())
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SurfacePattern(state.sourceSurface, ExtendMode::CLAMP, transform);
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return *mPattern;
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}
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mPattern = new (mColorPattern.addr())
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ColorPattern(state.color);
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return *mPattern;
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}
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gfxContext::gfxContext(DrawTarget *aTarget, const Point& aDeviceOffset)
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: mPathIsRect(false)
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, mTransformChanged(false)
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, mRefCairo(nullptr)
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, mDT(aTarget)
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, mOriginalDT(aTarget)
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{
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MOZ_ASSERT(aTarget, "Don't create a gfxContext without a DrawTarget");
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MOZ_COUNT_CTOR(gfxContext);
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mStateStack.SetLength(1);
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CurrentState().drawTarget = mDT;
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CurrentState().deviceOffset = aDeviceOffset;
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mDT->SetTransform(Matrix());
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}
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/* static */ already_AddRefed<gfxContext>
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gfxContext::ContextForDrawTarget(DrawTarget* aTarget)
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{
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Matrix transform = aTarget->GetTransform();
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nsRefPtr<gfxContext> result = new gfxContext(aTarget);
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result->SetMatrix(ThebesMatrix(transform));
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return result.forget();
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}
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gfxContext::~gfxContext()
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{
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if (mRefCairo) {
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cairo_destroy(mRefCairo);
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}
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for (int i = mStateStack.Length() - 1; i >= 0; i--) {
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for (unsigned int c = 0; c < mStateStack[i].pushedClips.Length(); c++) {
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mDT->PopClip();
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}
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if (mStateStack[i].clipWasReset) {
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break;
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}
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}
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mDT->Flush();
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MOZ_COUNT_DTOR(gfxContext);
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}
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already_AddRefed<gfxASurface>
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gfxContext::CurrentSurface(gfxFloat *dx, gfxFloat *dy)
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{
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if (mDT->GetBackendType() == BackendType::CAIRO) {
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cairo_surface_t *s =
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(cairo_surface_t*)mDT->GetNativeSurface(NativeSurfaceType::CAIRO_SURFACE);
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if (s) {
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if (dx && dy) {
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*dx = -CurrentState().deviceOffset.x;
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*dy = -CurrentState().deviceOffset.y;
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}
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return gfxASurface::Wrap(s);
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}
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}
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if (dx && dy) {
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*dx = *dy = 0;
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}
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// An Azure context doesn't have a surface backing it.
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return nullptr;
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}
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cairo_t *
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gfxContext::GetCairo()
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{
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if (mDT->GetBackendType() == BackendType::CAIRO) {
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cairo_t *ctx =
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(cairo_t*)mDT->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT);
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if (ctx) {
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return ctx;
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}
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}
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if (mRefCairo) {
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// Set transform!
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return mRefCairo;
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}
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mRefCairo = cairo_create(gfxPlatform::GetPlatform()->ScreenReferenceSurface()->CairoSurface());
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return mRefCairo;
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}
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void
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gfxContext::Save()
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{
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CurrentState().transform = mTransform;
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mStateStack.AppendElement(AzureState(CurrentState()));
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CurrentState().clipWasReset = false;
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CurrentState().pushedClips.Clear();
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}
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void
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gfxContext::Restore()
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{
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for (unsigned int c = 0; c < CurrentState().pushedClips.Length(); c++) {
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mDT->PopClip();
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}
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if (CurrentState().clipWasReset &&
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CurrentState().drawTarget == mStateStack[mStateStack.Length() - 2].drawTarget) {
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PushClipsToDT(mDT);
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}
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mStateStack.RemoveElementAt(mStateStack.Length() - 1);
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mDT = CurrentState().drawTarget;
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ChangeTransform(CurrentState().transform, false);
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}
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// drawing
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void
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gfxContext::NewPath()
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{
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mPath = nullptr;
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mPathBuilder = nullptr;
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mPathIsRect = false;
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mTransformChanged = false;
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}
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void
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gfxContext::ClosePath()
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{
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EnsurePathBuilder();
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mPathBuilder->Close();
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}
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TemporaryRef<Path> gfxContext::GetPath()
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{
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EnsurePath();
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return mPath;
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}
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void gfxContext::SetPath(Path* path)
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{
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MOZ_ASSERT(path->GetBackendType() == mDT->GetBackendType() ||
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(mDT->GetBackendType() == BackendType::DIRECT2D1_1 && path->GetBackendType() == BackendType::DIRECT2D));
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mPath = path;
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mPathBuilder = nullptr;
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mPathIsRect = false;
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mTransformChanged = false;
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}
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gfxPoint
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gfxContext::CurrentPoint()
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{
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EnsurePathBuilder();
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return ThebesPoint(mPathBuilder->CurrentPoint());
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}
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void
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gfxContext::Fill()
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{
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Fill(PatternFromState(this));
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}
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void
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gfxContext::Fill(const Pattern& aPattern)
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{
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PROFILER_LABEL("gfxContext", "Fill",
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js::ProfileEntry::Category::GRAPHICS);
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FillAzure(aPattern, 1.0f);
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}
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void
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gfxContext::MoveTo(const gfxPoint& pt)
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{
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EnsurePathBuilder();
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mPathBuilder->MoveTo(ToPoint(pt));
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}
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void
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gfxContext::LineTo(const gfxPoint& pt)
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{
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EnsurePathBuilder();
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mPathBuilder->LineTo(ToPoint(pt));
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}
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void
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gfxContext::Line(const gfxPoint& start, const gfxPoint& end)
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{
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EnsurePathBuilder();
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mPathBuilder->MoveTo(ToPoint(start));
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mPathBuilder->LineTo(ToPoint(end));
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}
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// XXX snapToPixels is only valid when snapping for filled
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// rectangles and for even-width stroked rectangles.
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// For odd-width stroked rectangles, we need to offset x/y by
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// 0.5...
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void
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gfxContext::Rectangle(const gfxRect& rect, bool snapToPixels)
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{
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Rect rec = ToRect(rect);
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if (snapToPixels) {
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gfxRect newRect(rect);
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if (UserToDevicePixelSnapped(newRect, true)) {
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gfxMatrix mat = ThebesMatrix(mTransform);
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if (mat.Invert()) {
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// We need the user space rect.
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rec = ToRect(mat.TransformBounds(newRect));
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} else {
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rec = Rect();
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}
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}
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}
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if (!mPathBuilder && !mPathIsRect) {
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mPathIsRect = true;
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mRect = rec;
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return;
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}
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EnsurePathBuilder();
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mPathBuilder->MoveTo(rec.TopLeft());
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mPathBuilder->LineTo(rec.TopRight());
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mPathBuilder->LineTo(rec.BottomRight());
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mPathBuilder->LineTo(rec.BottomLeft());
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mPathBuilder->Close();
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}
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void
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gfxContext::DrawSurface(gfxASurface *surface, const gfxSize& size)
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{
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// Lifetime needs to be limited here since we may wrap surface's data.
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RefPtr<SourceSurface> surf =
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gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(mDT, surface);
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if (!surf) {
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return;
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}
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Rect rect(0, 0, Float(size.width), Float(size.height));
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rect.Intersect(Rect(0, 0, Float(surf->GetSize().width), Float(surf->GetSize().height)));
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// XXX - Should fix pixel snapping.
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mDT->DrawSurface(surf, rect, rect);
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}
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// transform stuff
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void
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gfxContext::Multiply(const gfxMatrix& matrix)
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{
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ChangeTransform(ToMatrix(matrix) * mTransform);
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}
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void
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gfxContext::SetMatrix(const gfxMatrix& matrix)
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{
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ChangeTransform(ToMatrix(matrix));
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}
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gfxMatrix
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gfxContext::CurrentMatrix() const
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{
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return ThebesMatrix(mTransform);
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}
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gfxPoint
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gfxContext::DeviceToUser(const gfxPoint& point) const
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{
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Matrix matrix = mTransform;
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matrix.Invert();
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return ThebesPoint(matrix * ToPoint(point));
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}
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gfxSize
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gfxContext::DeviceToUser(const gfxSize& size) const
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{
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Matrix matrix = mTransform;
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matrix.Invert();
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return ThebesSize(matrix * ToSize(size));
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}
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gfxRect
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gfxContext::DeviceToUser(const gfxRect& rect) const
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{
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Matrix matrix = mTransform;
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matrix.Invert();
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return ThebesRect(matrix.TransformBounds(ToRect(rect)));
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}
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gfxPoint
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gfxContext::UserToDevice(const gfxPoint& point) const
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{
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return ThebesPoint(mTransform * ToPoint(point));
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}
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gfxSize
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gfxContext::UserToDevice(const gfxSize& size) const
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{
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const Matrix &matrix = mTransform;
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gfxSize newSize;
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newSize.width = size.width * matrix._11 + size.height * matrix._12;
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newSize.height = size.width * matrix._21 + size.height * matrix._22;
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return newSize;
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}
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gfxRect
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gfxContext::UserToDevice(const gfxRect& rect) const
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{
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const Matrix &matrix = mTransform;
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return ThebesRect(matrix.TransformBounds(ToRect(rect)));
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}
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bool
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gfxContext::UserToDevicePixelSnapped(gfxRect& rect, bool ignoreScale) const
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{
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if (mDT->GetUserData(&sDisablePixelSnapping))
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return false;
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// if we're not at 1.0 scale, don't snap, unless we're
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// ignoring the scale. If we're not -just- a scale,
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// never snap.
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const gfxFloat epsilon = 0.0000001;
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#define WITHIN_E(a,b) (fabs((a)-(b)) < epsilon)
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Matrix mat = mTransform;
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if (!ignoreScale &&
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(!WITHIN_E(mat._11,1.0) || !WITHIN_E(mat._22,1.0) ||
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!WITHIN_E(mat._12,0.0) || !WITHIN_E(mat._21,0.0)))
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return false;
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#undef WITHIN_E
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gfxPoint p1 = UserToDevice(rect.TopLeft());
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gfxPoint p2 = UserToDevice(rect.TopRight());
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gfxPoint p3 = UserToDevice(rect.BottomRight());
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// Check that the rectangle is axis-aligned. For an axis-aligned rectangle,
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// two opposite corners define the entire rectangle. So check if
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// the axis-aligned rectangle with opposite corners p1 and p3
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// define an axis-aligned rectangle whose other corners are p2 and p4.
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// We actually only need to check one of p2 and p4, since an affine
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// transform maps parallelograms to parallelograms.
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if (p2 == gfxPoint(p1.x, p3.y) || p2 == gfxPoint(p3.x, p1.y)) {
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p1.Round();
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p3.Round();
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rect.MoveTo(gfxPoint(std::min(p1.x, p3.x), std::min(p1.y, p3.y)));
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rect.SizeTo(gfxSize(std::max(p1.x, p3.x) - rect.X(),
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std::max(p1.y, p3.y) - rect.Y()));
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return true;
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}
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return false;
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}
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bool
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gfxContext::UserToDevicePixelSnapped(gfxPoint& pt, bool ignoreScale) const
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{
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if (mDT->GetUserData(&sDisablePixelSnapping))
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return false;
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// if we're not at 1.0 scale, don't snap, unless we're
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// ignoring the scale. If we're not -just- a scale,
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// never snap.
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const gfxFloat epsilon = 0.0000001;
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#define WITHIN_E(a,b) (fabs((a)-(b)) < epsilon)
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Matrix mat = mTransform;
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if (!ignoreScale &&
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(!WITHIN_E(mat._11,1.0) || !WITHIN_E(mat._22,1.0) ||
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!WITHIN_E(mat._12,0.0) || !WITHIN_E(mat._21,0.0)))
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return false;
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#undef WITHIN_E
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pt = UserToDevice(pt);
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pt.Round();
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return true;
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}
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void
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gfxContext::SetAntialiasMode(AntialiasMode mode)
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{
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CurrentState().aaMode = mode;
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}
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AntialiasMode
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gfxContext::CurrentAntialiasMode() const
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{
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return CurrentState().aaMode;
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}
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void
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gfxContext::SetDash(gfxFloat *dashes, int ndash, gfxFloat offset)
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{
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AzureState &state = CurrentState();
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state.dashPattern.SetLength(ndash);
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for (int i = 0; i < ndash; i++) {
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state.dashPattern[i] = Float(dashes[i]);
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}
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state.strokeOptions.mDashLength = ndash;
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state.strokeOptions.mDashOffset = Float(offset);
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state.strokeOptions.mDashPattern = ndash ? state.dashPattern.Elements()
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: nullptr;
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}
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bool
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gfxContext::CurrentDash(FallibleTArray<gfxFloat>& dashes, gfxFloat* offset) const
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{
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const AzureState &state = CurrentState();
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int count = state.strokeOptions.mDashLength;
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if (count <= 0 || !dashes.SetLength(count)) {
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return false;
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}
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for (int i = 0; i < count; i++) {
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dashes[i] = state.dashPattern[i];
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}
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*offset = state.strokeOptions.mDashOffset;
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return true;
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}
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gfxFloat
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gfxContext::CurrentDashOffset() const
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{
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return CurrentState().strokeOptions.mDashOffset;
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}
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void
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gfxContext::SetLineWidth(gfxFloat width)
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{
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CurrentState().strokeOptions.mLineWidth = Float(width);
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}
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gfxFloat
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gfxContext::CurrentLineWidth() const
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{
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return CurrentState().strokeOptions.mLineWidth;
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}
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void
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gfxContext::SetOperator(GraphicsOperator op)
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{
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CurrentState().op = CompositionOpForOp(op);
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}
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gfxContext::GraphicsOperator
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gfxContext::CurrentOperator() const
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{
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return ThebesOp(CurrentState().op);
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}
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void
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gfxContext::SetLineCap(CapStyle cap)
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{
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CurrentState().strokeOptions.mLineCap = cap;
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}
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CapStyle
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gfxContext::CurrentLineCap() const
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{
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return CurrentState().strokeOptions.mLineCap;
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}
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void
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gfxContext::SetLineJoin(JoinStyle join)
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{
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CurrentState().strokeOptions.mLineJoin = join;
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}
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JoinStyle
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gfxContext::CurrentLineJoin() const
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{
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return CurrentState().strokeOptions.mLineJoin;
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}
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void
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gfxContext::SetMiterLimit(gfxFloat limit)
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{
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CurrentState().strokeOptions.mMiterLimit = Float(limit);
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}
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gfxFloat
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gfxContext::CurrentMiterLimit() const
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{
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return CurrentState().strokeOptions.mMiterLimit;
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}
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void
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gfxContext::SetFillRule(FillRule rule)
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{
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CurrentState().fillRule = rule;
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}
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FillRule
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|
gfxContext::CurrentFillRule() const
|
|
{
|
|
return CurrentState().fillRule;
|
|
}
|
|
|
|
// clipping
|
|
void
|
|
gfxContext::Clip(const Rect& rect)
|
|
{
|
|
AzureState::PushedClip clip = { nullptr, rect, mTransform };
|
|
CurrentState().pushedClips.AppendElement(clip);
|
|
mDT->PushClipRect(rect);
|
|
NewPath();
|
|
}
|
|
|
|
void
|
|
gfxContext::Clip(const gfxRect& rect)
|
|
{
|
|
Clip(ToRect(rect));
|
|
}
|
|
|
|
void
|
|
gfxContext::Clip(Path* aPath)
|
|
{
|
|
mDT->PushClip(aPath);
|
|
AzureState::PushedClip clip = { aPath, Rect(), mTransform };
|
|
CurrentState().pushedClips.AppendElement(clip);
|
|
}
|
|
|
|
void
|
|
gfxContext::Clip()
|
|
{
|
|
if (mPathIsRect) {
|
|
MOZ_ASSERT(!mTransformChanged);
|
|
|
|
AzureState::PushedClip clip = { nullptr, mRect, mTransform };
|
|
CurrentState().pushedClips.AppendElement(clip);
|
|
mDT->PushClipRect(mRect);
|
|
} else {
|
|
EnsurePath();
|
|
mDT->PushClip(mPath);
|
|
AzureState::PushedClip clip = { mPath, Rect(), mTransform };
|
|
CurrentState().pushedClips.AppendElement(clip);
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxContext::ResetClip()
|
|
{
|
|
for (int i = mStateStack.Length() - 1; i >= 0; i--) {
|
|
for (unsigned int c = 0; c < mStateStack[i].pushedClips.Length(); c++) {
|
|
mDT->PopClip();
|
|
}
|
|
|
|
if (mStateStack[i].clipWasReset) {
|
|
break;
|
|
}
|
|
}
|
|
CurrentState().pushedClips.Clear();
|
|
CurrentState().clipWasReset = true;
|
|
}
|
|
|
|
void
|
|
gfxContext::UpdateSurfaceClip()
|
|
{
|
|
}
|
|
|
|
void
|
|
gfxContext::PopClip()
|
|
{
|
|
MOZ_ASSERT(CurrentState().pushedClips.Length() > 0);
|
|
|
|
CurrentState().pushedClips.RemoveElementAt(CurrentState().pushedClips.Length() - 1);
|
|
mDT->PopClip();
|
|
}
|
|
|
|
gfxRect
|
|
gfxContext::GetClipExtents()
|
|
{
|
|
Rect rect = GetAzureDeviceSpaceClipBounds();
|
|
|
|
if (rect.width == 0 || rect.height == 0) {
|
|
return gfxRect(0, 0, 0, 0);
|
|
}
|
|
|
|
Matrix mat = mTransform;
|
|
mat.Invert();
|
|
rect = mat.TransformBounds(rect);
|
|
|
|
return ThebesRect(rect);
|
|
}
|
|
|
|
bool
|
|
gfxContext::ClipContainsRect(const gfxRect& aRect)
|
|
{
|
|
unsigned int lastReset = 0;
|
|
for (int i = mStateStack.Length() - 2; i > 0; i--) {
|
|
if (mStateStack[i].clipWasReset) {
|
|
lastReset = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Since we always return false when the clip list contains a
|
|
// non-rectangular clip or a non-rectilinear transform, our 'total' clip
|
|
// is always a rectangle if we hit the end of this function.
|
|
Rect clipBounds(0, 0, Float(mDT->GetSize().width), Float(mDT->GetSize().height));
|
|
|
|
for (unsigned int i = lastReset; i < mStateStack.Length(); i++) {
|
|
for (unsigned int c = 0; c < mStateStack[i].pushedClips.Length(); c++) {
|
|
AzureState::PushedClip &clip = mStateStack[i].pushedClips[c];
|
|
if (clip.path || !clip.transform.IsRectilinear()) {
|
|
// Cairo behavior is we return false if the clip contains a non-
|
|
// rectangle.
|
|
return false;
|
|
} else {
|
|
Rect clipRect = mTransform.TransformBounds(clip.rect);
|
|
|
|
clipBounds.IntersectRect(clipBounds, clipRect);
|
|
}
|
|
}
|
|
}
|
|
|
|
return clipBounds.Contains(ToRect(aRect));
|
|
}
|
|
|
|
// rendering sources
|
|
|
|
void
|
|
gfxContext::SetColor(const gfxRGBA& c)
|
|
{
|
|
CurrentState().pattern = nullptr;
|
|
CurrentState().sourceSurfCairo = nullptr;
|
|
CurrentState().sourceSurface = nullptr;
|
|
CurrentState().color = ToDeviceColor(c);
|
|
}
|
|
|
|
void
|
|
gfxContext::SetDeviceColor(const gfxRGBA& c)
|
|
{
|
|
CurrentState().pattern = nullptr;
|
|
CurrentState().sourceSurfCairo = nullptr;
|
|
CurrentState().sourceSurface = nullptr;
|
|
CurrentState().color = ToColor(c);
|
|
}
|
|
|
|
bool
|
|
gfxContext::GetDeviceColor(gfxRGBA& c)
|
|
{
|
|
if (CurrentState().sourceSurface) {
|
|
return false;
|
|
}
|
|
if (CurrentState().pattern) {
|
|
gfxRGBA color;
|
|
return CurrentState().pattern->GetSolidColor(c);
|
|
}
|
|
|
|
c = ThebesRGBA(CurrentState().color);
|
|
return true;
|
|
}
|
|
|
|
void
|
|
gfxContext::SetSource(gfxASurface *surface, const gfxPoint& offset)
|
|
{
|
|
CurrentState().surfTransform = Matrix(1.0f, 0, 0, 1.0f, Float(offset.x), Float(offset.y));
|
|
CurrentState().pattern = nullptr;
|
|
CurrentState().patternTransformChanged = false;
|
|
// Keep the underlying cairo surface around while we keep the
|
|
// sourceSurface.
|
|
CurrentState().sourceSurfCairo = surface;
|
|
CurrentState().sourceSurface =
|
|
gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(mDT, surface);
|
|
CurrentState().color = Color(0, 0, 0, 0);
|
|
}
|
|
|
|
void
|
|
gfxContext::SetPattern(gfxPattern *pattern)
|
|
{
|
|
CurrentState().sourceSurfCairo = nullptr;
|
|
CurrentState().sourceSurface = nullptr;
|
|
CurrentState().patternTransformChanged = false;
|
|
CurrentState().pattern = pattern;
|
|
}
|
|
|
|
already_AddRefed<gfxPattern>
|
|
gfxContext::GetPattern()
|
|
{
|
|
nsRefPtr<gfxPattern> pat;
|
|
|
|
AzureState &state = CurrentState();
|
|
if (state.pattern) {
|
|
pat = state.pattern;
|
|
} else if (state.sourceSurface) {
|
|
NS_ASSERTION(false, "Ugh, this isn't good.");
|
|
} else {
|
|
pat = new gfxPattern(ThebesRGBA(state.color));
|
|
}
|
|
return pat.forget();
|
|
}
|
|
|
|
void
|
|
gfxContext::SetFontSmoothingBackgroundColor(const Color& aColor)
|
|
{
|
|
CurrentState().fontSmoothingBackgroundColor = aColor;
|
|
}
|
|
|
|
Color
|
|
gfxContext::GetFontSmoothingBackgroundColor()
|
|
{
|
|
return CurrentState().fontSmoothingBackgroundColor;
|
|
}
|
|
|
|
// masking
|
|
void
|
|
gfxContext::Mask(SourceSurface* aSurface, const Matrix& aTransform)
|
|
{
|
|
Matrix old = mTransform;
|
|
Matrix mat = aTransform * mTransform;
|
|
|
|
ChangeTransform(mat);
|
|
mDT->MaskSurface(PatternFromState(this), aSurface, Point(),
|
|
DrawOptions(1.0f, CurrentState().op, CurrentState().aaMode));
|
|
ChangeTransform(old);
|
|
}
|
|
|
|
void
|
|
gfxContext::Mask(gfxASurface *surface, const gfxPoint& offset)
|
|
{
|
|
PROFILER_LABEL("gfxContext", "Mask",
|
|
js::ProfileEntry::Category::GRAPHICS);
|
|
|
|
// Lifetime needs to be limited here as we may simply wrap surface's data.
|
|
RefPtr<SourceSurface> sourceSurf =
|
|
gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(mDT, surface);
|
|
|
|
if (!sourceSurf) {
|
|
return;
|
|
}
|
|
|
|
gfxPoint pt = surface->GetDeviceOffset();
|
|
|
|
Mask(sourceSurf, Point(offset.x - pt.x, offset.y - pt.y));
|
|
}
|
|
|
|
void
|
|
gfxContext::Mask(SourceSurface *surface, const Point& offset)
|
|
{
|
|
// We clip here to bind to the mask surface bounds, see above.
|
|
mDT->MaskSurface(PatternFromState(this),
|
|
surface,
|
|
offset,
|
|
DrawOptions(1.0f, CurrentState().op, CurrentState().aaMode));
|
|
}
|
|
|
|
void
|
|
gfxContext::Paint(gfxFloat alpha)
|
|
{
|
|
PROFILER_LABEL("gfxContext", "Paint",
|
|
js::ProfileEntry::Category::GRAPHICS);
|
|
|
|
AzureState &state = CurrentState();
|
|
|
|
if (state.sourceSurface && !state.sourceSurfCairo &&
|
|
!state.patternTransformChanged)
|
|
{
|
|
// This is the case where a PopGroupToSource has been done and this
|
|
// paint is executed without changing the transform or the source.
|
|
Matrix oldMat = mDT->GetTransform();
|
|
|
|
IntSize surfSize = state.sourceSurface->GetSize();
|
|
|
|
mDT->SetTransform(Matrix::Translation(-state.deviceOffset.x,
|
|
-state.deviceOffset.y));
|
|
|
|
mDT->DrawSurface(state.sourceSurface,
|
|
Rect(state.sourceSurfaceDeviceOffset, Size(surfSize.width, surfSize.height)),
|
|
Rect(Point(), Size(surfSize.width, surfSize.height)),
|
|
DrawSurfaceOptions(), DrawOptions(alpha, GetOp()));
|
|
mDT->SetTransform(oldMat);
|
|
return;
|
|
}
|
|
|
|
Matrix mat = mDT->GetTransform();
|
|
mat.Invert();
|
|
Rect paintRect = mat.TransformBounds(Rect(Point(0, 0), Size(mDT->GetSize())));
|
|
|
|
mDT->FillRect(paintRect, PatternFromState(this),
|
|
DrawOptions(Float(alpha), GetOp()));
|
|
}
|
|
|
|
// groups
|
|
|
|
void
|
|
gfxContext::PushGroup(gfxContentType content)
|
|
{
|
|
DrawTarget* oldDT = mDT;
|
|
|
|
PushNewDT(content);
|
|
|
|
if (oldDT != mDT) {
|
|
PushClipsToDT(mDT);
|
|
}
|
|
mDT->SetTransform(GetDTTransform());
|
|
}
|
|
|
|
static gfxRect
|
|
GetRoundOutDeviceClipExtents(gfxContext* aCtx)
|
|
{
|
|
gfxContextMatrixAutoSaveRestore save(aCtx);
|
|
aCtx->SetMatrix(gfxMatrix());
|
|
gfxRect r = aCtx->GetClipExtents();
|
|
r.RoundOut();
|
|
return r;
|
|
}
|
|
|
|
void
|
|
gfxContext::PushGroupAndCopyBackground(gfxContentType content)
|
|
{
|
|
IntRect clipExtents;
|
|
if (mDT->GetFormat() != SurfaceFormat::B8G8R8X8) {
|
|
gfxRect clipRect = GetRoundOutDeviceClipExtents(this);
|
|
clipExtents = IntRect(clipRect.x, clipRect.y, clipRect.width, clipRect.height);
|
|
}
|
|
if ((mDT->GetFormat() == SurfaceFormat::B8G8R8X8 ||
|
|
mDT->GetOpaqueRect().Contains(clipExtents)) &&
|
|
!mDT->GetUserData(&sDontUseAsSourceKey)) {
|
|
DrawTarget *oldDT = mDT;
|
|
RefPtr<SourceSurface> source = mDT->Snapshot();
|
|
Point oldDeviceOffset = CurrentState().deviceOffset;
|
|
|
|
PushNewDT(gfxContentType::COLOR);
|
|
|
|
if (oldDT == mDT) {
|
|
// Creating new DT failed.
|
|
return;
|
|
}
|
|
|
|
Point offset = CurrentState().deviceOffset - oldDeviceOffset;
|
|
Rect surfRect(0, 0, Float(mDT->GetSize().width), Float(mDT->GetSize().height));
|
|
Rect sourceRect = surfRect + offset;
|
|
|
|
mDT->SetTransform(Matrix());
|
|
|
|
// XXX: It's really sad that we have to do this (for performance).
|
|
// Once DrawTarget gets a PushLayer API we can implement this within
|
|
// DrawTargetTiled.
|
|
if (source->GetType() == SurfaceType::TILED) {
|
|
SnapshotTiled *sourceTiled = static_cast<SnapshotTiled*>(source.get());
|
|
for (uint32_t i = 0; i < sourceTiled->mSnapshots.size(); i++) {
|
|
Rect tileSourceRect = sourceRect.Intersect(Rect(sourceTiled->mOrigins[i].x,
|
|
sourceTiled->mOrigins[i].y,
|
|
sourceTiled->mSnapshots[i]->GetSize().width,
|
|
sourceTiled->mSnapshots[i]->GetSize().height));
|
|
|
|
if (tileSourceRect.IsEmpty()) {
|
|
continue;
|
|
}
|
|
Rect tileDestRect = tileSourceRect - offset;
|
|
tileSourceRect -= sourceTiled->mOrigins[i];
|
|
|
|
mDT->DrawSurface(sourceTiled->mSnapshots[i], tileDestRect, tileSourceRect);
|
|
}
|
|
} else {
|
|
mDT->DrawSurface(source, surfRect, sourceRect);
|
|
}
|
|
mDT->SetOpaqueRect(oldDT->GetOpaqueRect());
|
|
|
|
PushClipsToDT(mDT);
|
|
mDT->SetTransform(GetDTTransform());
|
|
return;
|
|
}
|
|
PushGroup(content);
|
|
}
|
|
|
|
already_AddRefed<gfxPattern>
|
|
gfxContext::PopGroup()
|
|
{
|
|
RefPtr<SourceSurface> src = mDT->Snapshot();
|
|
Point deviceOffset = CurrentState().deviceOffset;
|
|
|
|
Restore();
|
|
|
|
Matrix mat = mTransform;
|
|
mat.Invert();
|
|
mat.PreTranslate(deviceOffset.x, deviceOffset.y); // device offset translation
|
|
|
|
nsRefPtr<gfxPattern> pat = new gfxPattern(src, mat);
|
|
|
|
return pat.forget();
|
|
}
|
|
|
|
TemporaryRef<SourceSurface>
|
|
gfxContext::PopGroupToSurface(Matrix* aTransform)
|
|
{
|
|
RefPtr<SourceSurface> src = mDT->Snapshot();
|
|
Point deviceOffset = CurrentState().deviceOffset;
|
|
|
|
Restore();
|
|
|
|
Matrix mat = mTransform;
|
|
mat.Invert();
|
|
|
|
Matrix deviceOffsetTranslation;
|
|
deviceOffsetTranslation.PreTranslate(deviceOffset.x, deviceOffset.y);
|
|
|
|
*aTransform = deviceOffsetTranslation * mat;
|
|
return src;
|
|
}
|
|
|
|
void
|
|
gfxContext::PopGroupToSource()
|
|
{
|
|
RefPtr<SourceSurface> src = mDT->Snapshot();
|
|
Point deviceOffset = CurrentState().deviceOffset;
|
|
Restore();
|
|
CurrentState().sourceSurfCairo = nullptr;
|
|
CurrentState().sourceSurface = src;
|
|
CurrentState().sourceSurfaceDeviceOffset = deviceOffset;
|
|
CurrentState().pattern = nullptr;
|
|
CurrentState().patternTransformChanged = false;
|
|
|
|
Matrix mat = mTransform;
|
|
mat.Invert();
|
|
mat.PreTranslate(deviceOffset.x, deviceOffset.y); // device offset translation
|
|
|
|
CurrentState().surfTransform = mat;
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
void
|
|
gfxContext::WriteAsPNG(const char* aFile)
|
|
{
|
|
gfxUtils::WriteAsPNG(mDT, aFile);
|
|
}
|
|
|
|
void
|
|
gfxContext::DumpAsDataURI()
|
|
{
|
|
gfxUtils::DumpAsDataURI(mDT);
|
|
}
|
|
|
|
void
|
|
gfxContext::CopyAsDataURI()
|
|
{
|
|
gfxUtils::CopyAsDataURI(mDT);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
gfxContext::EnsurePath()
|
|
{
|
|
if (mPathBuilder) {
|
|
mPath = mPathBuilder->Finish();
|
|
mPathBuilder = nullptr;
|
|
}
|
|
|
|
if (mPath) {
|
|
if (mTransformChanged) {
|
|
Matrix mat = mTransform;
|
|
mat.Invert();
|
|
mat = mPathTransform * mat;
|
|
mPathBuilder = mPath->TransformedCopyToBuilder(mat, CurrentState().fillRule);
|
|
mPath = mPathBuilder->Finish();
|
|
mPathBuilder = nullptr;
|
|
|
|
mTransformChanged = false;
|
|
}
|
|
|
|
if (CurrentState().fillRule == mPath->GetFillRule()) {
|
|
return;
|
|
}
|
|
|
|
mPathBuilder = mPath->CopyToBuilder(CurrentState().fillRule);
|
|
|
|
mPath = mPathBuilder->Finish();
|
|
mPathBuilder = nullptr;
|
|
return;
|
|
}
|
|
|
|
EnsurePathBuilder();
|
|
mPath = mPathBuilder->Finish();
|
|
mPathBuilder = nullptr;
|
|
}
|
|
|
|
void
|
|
gfxContext::EnsurePathBuilder()
|
|
{
|
|
if (mPathBuilder && !mTransformChanged) {
|
|
return;
|
|
}
|
|
|
|
if (mPath) {
|
|
if (!mTransformChanged) {
|
|
mPathBuilder = mPath->CopyToBuilder(CurrentState().fillRule);
|
|
mPath = nullptr;
|
|
} else {
|
|
Matrix invTransform = mTransform;
|
|
invTransform.Invert();
|
|
Matrix toNewUS = mPathTransform * invTransform;
|
|
mPathBuilder = mPath->TransformedCopyToBuilder(toNewUS, CurrentState().fillRule);
|
|
}
|
|
return;
|
|
}
|
|
|
|
DebugOnly<PathBuilder*> oldPath = mPathBuilder.get();
|
|
|
|
if (!mPathBuilder) {
|
|
mPathBuilder = mDT->CreatePathBuilder(CurrentState().fillRule);
|
|
|
|
if (mPathIsRect) {
|
|
mPathBuilder->MoveTo(mRect.TopLeft());
|
|
mPathBuilder->LineTo(mRect.TopRight());
|
|
mPathBuilder->LineTo(mRect.BottomRight());
|
|
mPathBuilder->LineTo(mRect.BottomLeft());
|
|
mPathBuilder->Close();
|
|
}
|
|
}
|
|
|
|
if (mTransformChanged) {
|
|
// This could be an else if since this should never happen when
|
|
// mPathBuilder is nullptr and mPath is nullptr. But this way we can
|
|
// assert if all the state is as expected.
|
|
MOZ_ASSERT(oldPath);
|
|
MOZ_ASSERT(!mPathIsRect);
|
|
|
|
Matrix invTransform = mTransform;
|
|
invTransform.Invert();
|
|
Matrix toNewUS = mPathTransform * invTransform;
|
|
|
|
RefPtr<Path> path = mPathBuilder->Finish();
|
|
mPathBuilder = path->TransformedCopyToBuilder(toNewUS, CurrentState().fillRule);
|
|
}
|
|
|
|
mPathIsRect = false;
|
|
}
|
|
|
|
void
|
|
gfxContext::FillAzure(const Pattern& aPattern, Float aOpacity)
|
|
{
|
|
AzureState &state = CurrentState();
|
|
|
|
CompositionOp op = GetOp();
|
|
|
|
if (mPathIsRect) {
|
|
MOZ_ASSERT(!mTransformChanged);
|
|
|
|
if (op == CompositionOp::OP_SOURCE) {
|
|
// Emulate cairo operator source which is bound by mask!
|
|
mDT->ClearRect(mRect);
|
|
mDT->FillRect(mRect, aPattern, DrawOptions(aOpacity));
|
|
} else {
|
|
mDT->FillRect(mRect, aPattern, DrawOptions(aOpacity, op, state.aaMode));
|
|
}
|
|
} else {
|
|
EnsurePath();
|
|
mDT->Fill(mPath, aPattern, DrawOptions(aOpacity, op, state.aaMode));
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxContext::PushClipsToDT(DrawTarget *aDT)
|
|
{
|
|
// Tricky, we have to restore all clips -since the last time- the clip
|
|
// was reset. If we didn't reset the clip, just popping the clips we
|
|
// added was fine.
|
|
unsigned int lastReset = 0;
|
|
for (int i = mStateStack.Length() - 2; i > 0; i--) {
|
|
if (mStateStack[i].clipWasReset) {
|
|
lastReset = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Don't need to save the old transform, we'll be setting a new one soon!
|
|
|
|
// Push all clips from the last state on the stack where the clip was
|
|
// reset to the clip before ours.
|
|
for (unsigned int i = lastReset; i < mStateStack.Length() - 1; i++) {
|
|
for (unsigned int c = 0; c < mStateStack[i].pushedClips.Length(); c++) {
|
|
aDT->SetTransform(mStateStack[i].pushedClips[c].transform * GetDeviceTransform());
|
|
if (mStateStack[i].pushedClips[c].path) {
|
|
aDT->PushClip(mStateStack[i].pushedClips[c].path);
|
|
} else {
|
|
aDT->PushClipRect(mStateStack[i].pushedClips[c].rect);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
CompositionOp
|
|
gfxContext::GetOp()
|
|
{
|
|
if (CurrentState().op != CompositionOp::OP_SOURCE) {
|
|
return CurrentState().op;
|
|
}
|
|
|
|
AzureState &state = CurrentState();
|
|
if (state.pattern) {
|
|
if (state.pattern->IsOpaque()) {
|
|
return CompositionOp::OP_OVER;
|
|
} else {
|
|
return CompositionOp::OP_SOURCE;
|
|
}
|
|
} else if (state.sourceSurface) {
|
|
if (state.sourceSurface->GetFormat() == SurfaceFormat::B8G8R8X8) {
|
|
return CompositionOp::OP_OVER;
|
|
} else {
|
|
return CompositionOp::OP_SOURCE;
|
|
}
|
|
} else {
|
|
if (state.color.a > 0.999) {
|
|
return CompositionOp::OP_OVER;
|
|
} else {
|
|
return CompositionOp::OP_SOURCE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* SVG font code can change the transform after having set the pattern on the
|
|
* context. When the pattern is set it is in user space, if the transform is
|
|
* changed after doing so the pattern needs to be converted back into userspace.
|
|
* We just store the old pattern transform here so that we only do the work
|
|
* needed here if the pattern is actually used.
|
|
* We need to avoid doing this when this ChangeTransform comes from a restore,
|
|
* since the current pattern and the current transform are both part of the
|
|
* state we know the new CurrentState()'s values are valid. But if we assume
|
|
* a change they might become invalid since patternTransformChanged is part of
|
|
* the state and might be false for the restored AzureState.
|
|
*/
|
|
void
|
|
gfxContext::ChangeTransform(const Matrix &aNewMatrix, bool aUpdatePatternTransform)
|
|
{
|
|
AzureState &state = CurrentState();
|
|
|
|
if (aUpdatePatternTransform && (state.pattern || state.sourceSurface)
|
|
&& !state.patternTransformChanged) {
|
|
state.patternTransform = GetDTTransform();
|
|
state.patternTransformChanged = true;
|
|
}
|
|
|
|
if (mPathIsRect) {
|
|
Matrix invMatrix = aNewMatrix;
|
|
|
|
invMatrix.Invert();
|
|
|
|
Matrix toNewUS = mTransform * invMatrix;
|
|
|
|
if (toNewUS.IsRectilinear()) {
|
|
mRect = toNewUS.TransformBounds(mRect);
|
|
mRect.NudgeToIntegers();
|
|
} else {
|
|
mPathBuilder = mDT->CreatePathBuilder(CurrentState().fillRule);
|
|
|
|
mPathBuilder->MoveTo(toNewUS * mRect.TopLeft());
|
|
mPathBuilder->LineTo(toNewUS * mRect.TopRight());
|
|
mPathBuilder->LineTo(toNewUS * mRect.BottomRight());
|
|
mPathBuilder->LineTo(toNewUS * mRect.BottomLeft());
|
|
mPathBuilder->Close();
|
|
|
|
mPathIsRect = false;
|
|
}
|
|
|
|
// No need to consider the transform changed now!
|
|
mTransformChanged = false;
|
|
} else if ((mPath || mPathBuilder) && !mTransformChanged) {
|
|
mTransformChanged = true;
|
|
mPathTransform = mTransform;
|
|
}
|
|
|
|
mTransform = aNewMatrix;
|
|
|
|
mDT->SetTransform(GetDTTransform());
|
|
}
|
|
|
|
Rect
|
|
gfxContext::GetAzureDeviceSpaceClipBounds()
|
|
{
|
|
unsigned int lastReset = 0;
|
|
for (int i = mStateStack.Length() - 1; i > 0; i--) {
|
|
if (mStateStack[i].clipWasReset) {
|
|
lastReset = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
Rect rect(CurrentState().deviceOffset.x, CurrentState().deviceOffset.y,
|
|
Float(mDT->GetSize().width), Float(mDT->GetSize().height));
|
|
for (unsigned int i = lastReset; i < mStateStack.Length(); i++) {
|
|
for (unsigned int c = 0; c < mStateStack[i].pushedClips.Length(); c++) {
|
|
AzureState::PushedClip &clip = mStateStack[i].pushedClips[c];
|
|
if (clip.path) {
|
|
Rect bounds = clip.path->GetBounds(clip.transform);
|
|
rect.IntersectRect(rect, bounds);
|
|
} else {
|
|
rect.IntersectRect(rect, clip.transform.TransformBounds(clip.rect));
|
|
}
|
|
}
|
|
}
|
|
|
|
return rect;
|
|
}
|
|
|
|
Point
|
|
gfxContext::GetDeviceOffset() const
|
|
{
|
|
return CurrentState().deviceOffset;
|
|
}
|
|
|
|
Matrix
|
|
gfxContext::GetDeviceTransform() const
|
|
{
|
|
return Matrix::Translation(-CurrentState().deviceOffset.x,
|
|
-CurrentState().deviceOffset.y);
|
|
}
|
|
|
|
Matrix
|
|
gfxContext::GetDTTransform() const
|
|
{
|
|
Matrix mat = mTransform;
|
|
mat._31 -= CurrentState().deviceOffset.x;
|
|
mat._32 -= CurrentState().deviceOffset.y;
|
|
return mat;
|
|
}
|
|
|
|
void
|
|
gfxContext::PushNewDT(gfxContentType content)
|
|
{
|
|
Rect clipBounds = GetAzureDeviceSpaceClipBounds();
|
|
clipBounds.RoundOut();
|
|
|
|
clipBounds.width = std::max(1.0f, clipBounds.width);
|
|
clipBounds.height = std::max(1.0f, clipBounds.height);
|
|
|
|
SurfaceFormat format = gfxPlatform::GetPlatform()->Optimal2DFormatForContent(content);
|
|
|
|
RefPtr<DrawTarget> newDT =
|
|
mDT->CreateSimilarDrawTarget(IntSize(int32_t(clipBounds.width), int32_t(clipBounds.height)),
|
|
format);
|
|
|
|
if (!newDT) {
|
|
NS_WARNING("Failed to create DrawTarget of sufficient size.");
|
|
newDT = mDT->CreateSimilarDrawTarget(IntSize(64, 64), format);
|
|
|
|
if (!newDT) {
|
|
if (!gfxPlatform::GetPlatform()->DidRenderingDeviceReset()) {
|
|
// If even this fails.. we're most likely just out of memory!
|
|
NS_ABORT_OOM(BytesPerPixel(format) * 64 * 64);
|
|
}
|
|
newDT = CurrentState().drawTarget;
|
|
}
|
|
}
|
|
|
|
Save();
|
|
|
|
CurrentState().drawTarget = newDT;
|
|
CurrentState().deviceOffset = clipBounds.TopLeft();
|
|
|
|
mDT = newDT;
|
|
}
|
|
|
|
/**
|
|
* Work out whether cairo will snap inter-glyph spacing to pixels.
|
|
*
|
|
* Layout does not align text to pixel boundaries, so, with font drawing
|
|
* backends that snap glyph positions to pixels, it is important that
|
|
* inter-glyph spacing within words is always an integer number of pixels.
|
|
* This ensures that the drawing backend snaps all of the word's glyphs in the
|
|
* same direction and so inter-glyph spacing remains the same.
|
|
*/
|
|
void
|
|
gfxContext::GetRoundOffsetsToPixels(bool *aRoundX, bool *aRoundY)
|
|
{
|
|
*aRoundX = false;
|
|
// Could do something fancy here for ScaleFactors of
|
|
// AxisAlignedTransforms, but we leave things simple.
|
|
// Not much point rounding if a matrix will mess things up anyway.
|
|
// Also return false for non-cairo contexts.
|
|
if (CurrentMatrix().HasNonTranslation()) {
|
|
*aRoundY = false;
|
|
return;
|
|
}
|
|
|
|
// All raster backends snap glyphs to pixels vertically.
|
|
// Print backends set CAIRO_HINT_METRICS_OFF.
|
|
*aRoundY = true;
|
|
|
|
cairo_t *cr = GetCairo();
|
|
cairo_scaled_font_t *scaled_font = cairo_get_scaled_font(cr);
|
|
// Sometimes hint metrics gets set for us, most notably for printing.
|
|
cairo_font_options_t *font_options = cairo_font_options_create();
|
|
cairo_scaled_font_get_font_options(scaled_font, font_options);
|
|
cairo_hint_metrics_t hint_metrics =
|
|
cairo_font_options_get_hint_metrics(font_options);
|
|
cairo_font_options_destroy(font_options);
|
|
|
|
switch (hint_metrics) {
|
|
case CAIRO_HINT_METRICS_OFF:
|
|
*aRoundY = false;
|
|
return;
|
|
case CAIRO_HINT_METRICS_DEFAULT:
|
|
// Here we mimic what cairo surface/font backends do. Printing
|
|
// surfaces have already been handled by hint_metrics. The
|
|
// fallback show_glyphs implementation composites pixel-aligned
|
|
// glyph surfaces, so we just pick surface/font combinations that
|
|
// override this.
|
|
switch (cairo_scaled_font_get_type(scaled_font)) {
|
|
#if CAIRO_HAS_DWRITE_FONT // dwrite backend is not in std cairo releases yet
|
|
case CAIRO_FONT_TYPE_DWRITE:
|
|
// show_glyphs is implemented on the font and so is used for
|
|
// all surface types; however, it may pixel-snap depending on
|
|
// the dwrite rendering mode
|
|
if (!cairo_dwrite_scaled_font_get_force_GDI_classic(scaled_font) &&
|
|
gfxWindowsPlatform::GetPlatform()->DWriteMeasuringMode() ==
|
|
DWRITE_MEASURING_MODE_NATURAL) {
|
|
return;
|
|
}
|
|
#endif
|
|
case CAIRO_FONT_TYPE_QUARTZ:
|
|
// Quartz surfaces implement show_glyphs for Quartz fonts
|
|
if (cairo_surface_get_type(cairo_get_target(cr)) ==
|
|
CAIRO_SURFACE_TYPE_QUARTZ) {
|
|
return;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
// fall through:
|
|
case CAIRO_HINT_METRICS_ON:
|
|
break;
|
|
}
|
|
*aRoundX = true;
|
|
return;
|
|
}
|