1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/gfxQuartzNativeDrawing.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,172 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "gfxQuartzNativeDrawing.h"
1.10 +#include "gfxQuartzSurface.h"
1.11 +#include "gfxPlatform.h"
1.12 +#include "cairo-quartz.h"
1.13 +
1.14 +// see cairo-quartz-surface.c for the complete list of these
1.15 +enum {
1.16 + kPrivateCGCompositeSourceOver = 2
1.17 +};
1.18 +
1.19 +using namespace mozilla::gfx;
1.20 +using namespace mozilla;
1.21 +
1.22 +// private Quartz routine needed here
1.23 +extern "C" {
1.24 + CG_EXTERN void CGContextSetCompositeOperation(CGContextRef, int);
1.25 +}
1.26 +
1.27 +gfxQuartzNativeDrawing::gfxQuartzNativeDrawing(gfxContext* ctx,
1.28 + const gfxRect& nativeRect,
1.29 + gfxFloat aBackingScale)
1.30 + : mContext(ctx)
1.31 + , mNativeRect(nativeRect)
1.32 + , mBackingScale(aBackingScale)
1.33 +{
1.34 + mNativeRect.RoundOut();
1.35 +}
1.36 +
1.37 +CGContextRef
1.38 +gfxQuartzNativeDrawing::BeginNativeDrawing()
1.39 +{
1.40 + NS_ASSERTION(!mQuartzSurface, "BeginNativeDrawing called when drawing already in progress");
1.41 +
1.42 + gfxPoint deviceOffset;
1.43 + nsRefPtr<gfxASurface> surf;
1.44 +
1.45 + if (!mContext->IsCairo()) {
1.46 + DrawTarget *dt = mContext->GetDrawTarget();
1.47 + if (dt->GetType() == BackendType::COREGRAPHICS) {
1.48 + if (dt->IsDualDrawTarget()) {
1.49 + IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
1.50 + NSToIntFloor(mNativeRect.height * mBackingScale));
1.51 +
1.52 + if (backingSize.IsEmpty())
1.53 + return nullptr;
1.54 +
1.55 + mDrawTarget = Factory::CreateDrawTarget(BackendType::COREGRAPHICS, backingSize, SurfaceFormat::B8G8R8A8);
1.56 +
1.57 + Matrix transform;
1.58 + transform.Scale(mBackingScale, mBackingScale);
1.59 + transform.Translate(-mNativeRect.x, -mNativeRect.y);
1.60 +
1.61 + mDrawTarget->SetTransform(transform);
1.62 + dt = mDrawTarget;
1.63 + }
1.64 +
1.65 + mCGContext = mBorrowedContext.Init(dt);
1.66 + MOZ_ASSERT(mCGContext);
1.67 + return mCGContext;
1.68 + }
1.69 + surf = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(dt);
1.70 + } else {
1.71 + surf = mContext->CurrentSurface(&deviceOffset.x, &deviceOffset.y);
1.72 + }
1.73 + if (!surf || surf->CairoStatus())
1.74 + return nullptr;
1.75 +
1.76 + // if this is a native Quartz surface, we don't have to redirect
1.77 + // rendering to our own CGContextRef; in most cases, we are able to
1.78 + // use the CGContextRef from the surface directly. we can extend
1.79 + // this to support offscreen drawing fairly easily in the future.
1.80 + if (surf->GetType() == gfxSurfaceType::Quartz &&
1.81 + (surf->GetContentType() == gfxContentType::COLOR ||
1.82 + (surf->GetContentType() == gfxContentType::COLOR_ALPHA))) {
1.83 + mQuartzSurface = static_cast<gfxQuartzSurface*>(surf.get());
1.84 + mSurfaceContext = mContext;
1.85 +
1.86 + // grab the CGContextRef
1.87 + mCGContext = cairo_quartz_get_cg_context_with_clip(mSurfaceContext->GetCairo());
1.88 + if (!mCGContext)
1.89 + return nullptr;
1.90 +
1.91 + gfxMatrix m = mContext->CurrentMatrix();
1.92 + CGContextTranslateCTM(mCGContext, deviceOffset.x, deviceOffset.y);
1.93 +
1.94 + // I -think- that this context will always have an identity
1.95 + // transform (since we don't maintain a transform on it in
1.96 + // cairo-land, and instead push/pop as needed)
1.97 +
1.98 + gfxFloat x0 = m.x0;
1.99 + gfxFloat y0 = m.y0;
1.100 +
1.101 + // We round x0/y0 if we don't have a scale, because otherwise things get
1.102 + // rendered badly
1.103 + // XXX how should we be rounding x0/y0?
1.104 + if (!m.HasNonTranslationOrFlip()) {
1.105 + x0 = floor(x0 + 0.5);
1.106 + y0 = floor(y0 + 0.5);
1.107 + }
1.108 +
1.109 + CGContextConcatCTM(mCGContext, CGAffineTransformMake(m.xx, m.yx,
1.110 + m.xy, m.yy,
1.111 + x0, y0));
1.112 +
1.113 + // bug 382049 - need to explicity set the composite operation to sourceOver
1.114 + CGContextSetCompositeOperation(mCGContext, kPrivateCGCompositeSourceOver);
1.115 + } else {
1.116 + nsIntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
1.117 + NSToIntFloor(mNativeRect.height * mBackingScale));
1.118 + mQuartzSurface = new gfxQuartzSurface(backingSize,
1.119 + gfxImageFormat::ARGB32);
1.120 + if (mQuartzSurface->CairoStatus())
1.121 + return nullptr;
1.122 + mSurfaceContext = new gfxContext(mQuartzSurface);
1.123 +
1.124 + // grab the CGContextRef
1.125 + mCGContext = cairo_quartz_get_cg_context_with_clip(mSurfaceContext->GetCairo());
1.126 + CGContextScaleCTM(mCGContext, mBackingScale, mBackingScale);
1.127 + CGContextTranslateCTM(mCGContext, -mNativeRect.X(), -mNativeRect.Y());
1.128 + }
1.129 +
1.130 + return mCGContext;
1.131 +}
1.132 +
1.133 +void
1.134 +gfxQuartzNativeDrawing::EndNativeDrawing()
1.135 +{
1.136 + NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing");
1.137 +
1.138 + if (mBorrowedContext.cg) {
1.139 + MOZ_ASSERT(!mContext->IsCairo());
1.140 + mBorrowedContext.Finish();
1.141 + if (mDrawTarget) {
1.142 + DrawTarget *dest = mContext->GetDrawTarget();
1.143 + RefPtr<SourceSurface> source = mDrawTarget->Snapshot();
1.144 +
1.145 + IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
1.146 + NSToIntFloor(mNativeRect.height * mBackingScale));
1.147 +
1.148 + Matrix oldTransform = dest->GetTransform();
1.149 + Matrix newTransform = oldTransform;
1.150 + newTransform.Translate(mNativeRect.x, mNativeRect.y);
1.151 + newTransform.Scale(1.0f / mBackingScale, 1.0f / mBackingScale);
1.152 +
1.153 + dest->SetTransform(newTransform);
1.154 +
1.155 + dest->DrawSurface(source,
1.156 + gfx::Rect(0, 0, backingSize.width, backingSize.height),
1.157 + gfx::Rect(0, 0, backingSize.width, backingSize.height));
1.158 +
1.159 +
1.160 + dest->SetTransform(oldTransform);
1.161 + }
1.162 + return;
1.163 + }
1.164 +
1.165 + cairo_quartz_finish_cg_context_with_clip(mSurfaceContext->GetCairo());
1.166 + mQuartzSurface->MarkDirty();
1.167 + if (mSurfaceContext != mContext) {
1.168 + gfxContextMatrixAutoSaveRestore save(mContext);
1.169 +
1.170 + // Copy back to destination
1.171 + mContext->Translate(mNativeRect.TopLeft());
1.172 + mContext->Scale(1.0f / mBackingScale, 1.0f / mBackingScale);
1.173 + mContext->DrawSurface(mQuartzSurface, mQuartzSurface->GetSize());
1.174 + }
1.175 +}
