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comparison: gfx/thebes/gfxQuartzNativeDrawing.cpp
gfx/thebes/gfxQuartzNativeDrawing.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:79ffc77a2c29 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "gfxQuartzNativeDrawing.h" | |
| 7 #include "gfxQuartzSurface.h" | |
| 8 #include "gfxPlatform.h" | |
| 9 #include "cairo-quartz.h" | |
| 10 | |
| 11 // see cairo-quartz-surface.c for the complete list of these | |
| 12 enum { | |
| 13 kPrivateCGCompositeSourceOver = 2 | |
| 14 }; | |
| 15 | |
| 16 using namespace mozilla::gfx; | |
| 17 using namespace mozilla; | |
| 18 | |
| 19 // private Quartz routine needed here | |
| 20 extern "C" { | |
| 21 CG_EXTERN void CGContextSetCompositeOperation(CGContextRef, int); | |
| 22 } | |
| 23 | |
| 24 gfxQuartzNativeDrawing::gfxQuartzNativeDrawing(gfxContext* ctx, | |
| 25 const gfxRect& nativeRect, | |
| 26 gfxFloat aBackingScale) | |
| 27 : mContext(ctx) | |
| 28 , mNativeRect(nativeRect) | |
| 29 , mBackingScale(aBackingScale) | |
| 30 { | |
| 31 mNativeRect.RoundOut(); | |
| 32 } | |
| 33 | |
| 34 CGContextRef | |
| 35 gfxQuartzNativeDrawing::BeginNativeDrawing() | |
| 36 { | |
| 37 NS_ASSERTION(!mQuartzSurface, "BeginNativeDrawing called when drawing already in progress"); | |
| 38 | |
| 39 gfxPoint deviceOffset; | |
| 40 nsRefPtr<gfxASurface> surf; | |
| 41 | |
| 42 if (!mContext->IsCairo()) { | |
| 43 DrawTarget *dt = mContext->GetDrawTarget(); | |
| 44 if (dt->GetType() == BackendType::COREGRAPHICS) { | |
| 45 if (dt->IsDualDrawTarget()) { | |
| 46 IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale), | |
| 47 NSToIntFloor(mNativeRect.height * mBackingScale)); | |
| 48 | |
| 49 if (backingSize.IsEmpty()) | |
| 50 return nullptr; | |
| 51 | |
| 52 mDrawTarget = Factory::CreateDrawTarget(BackendType::COREGRAPHICS, backingSize, SurfaceFormat::B8G8R8A8); | |
| 53 | |
| 54 Matrix transform; | |
| 55 transform.Scale(mBackingScale, mBackingScale); | |
| 56 transform.Translate(-mNativeRect.x, -mNativeRect.y); | |
| 57 | |
| 58 mDrawTarget->SetTransform(transform); | |
| 59 dt = mDrawTarget; | |
| 60 } | |
| 61 | |
| 62 mCGContext = mBorrowedContext.Init(dt); | |
| 63 MOZ_ASSERT(mCGContext); | |
| 64 return mCGContext; | |
| 65 } | |
| 66 surf = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(dt); | |
| 67 } else { | |
| 68 surf = mContext->CurrentSurface(&deviceOffset.x, &deviceOffset.y); | |
| 69 } | |
| 70 if (!surf || surf->CairoStatus()) | |
| 71 return nullptr; | |
| 72 | |
| 73 // if this is a native Quartz surface, we don't have to redirect | |
| 74 // rendering to our own CGContextRef; in most cases, we are able to | |
| 75 // use the CGContextRef from the surface directly. we can extend | |
| 76 // this to support offscreen drawing fairly easily in the future. | |
| 77 if (surf->GetType() == gfxSurfaceType::Quartz && | |
| 78 (surf->GetContentType() == gfxContentType::COLOR || | |
| 79 (surf->GetContentType() == gfxContentType::COLOR_ALPHA))) { | |
| 80 mQuartzSurface = static_cast<gfxQuartzSurface*>(surf.get()); | |
| 81 mSurfaceContext = mContext; | |
| 82 | |
| 83 // grab the CGContextRef | |
| 84 mCGContext = cairo_quartz_get_cg_context_with_clip(mSurfaceContext->GetCairo()); | |
| 85 if (!mCGContext) | |
| 86 return nullptr; | |
| 87 | |
| 88 gfxMatrix m = mContext->CurrentMatrix(); | |
| 89 CGContextTranslateCTM(mCGContext, deviceOffset.x, deviceOffset.y); | |
| 90 | |
| 91 // I -think- that this context will always have an identity | |
| 92 // transform (since we don't maintain a transform on it in | |
| 93 // cairo-land, and instead push/pop as needed) | |
| 94 | |
| 95 gfxFloat x0 = m.x0; | |
| 96 gfxFloat y0 = m.y0; | |
| 97 | |
| 98 // We round x0/y0 if we don't have a scale, because otherwise things get | |
| 99 // rendered badly | |
| 100 // XXX how should we be rounding x0/y0? | |
| 101 if (!m.HasNonTranslationOrFlip()) { | |
| 102 x0 = floor(x0 + 0.5); | |
| 103 y0 = floor(y0 + 0.5); | |
| 104 } | |
| 105 | |
| 106 CGContextConcatCTM(mCGContext, CGAffineTransformMake(m.xx, m.yx, | |
| 107 m.xy, m.yy, | |
| 108 x0, y0)); | |
| 109 | |
| 110 // bug 382049 - need to explicity set the composite operation to sourceOver | |
| 111 CGContextSetCompositeOperation(mCGContext, kPrivateCGCompositeSourceOver); | |
| 112 } else { | |
| 113 nsIntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale), | |
| 114 NSToIntFloor(mNativeRect.height * mBackingScale)); | |
| 115 mQuartzSurface = new gfxQuartzSurface(backingSize, | |
| 116 gfxImageFormat::ARGB32); | |
| 117 if (mQuartzSurface->CairoStatus()) | |
| 118 return nullptr; | |
| 119 mSurfaceContext = new gfxContext(mQuartzSurface); | |
| 120 | |
| 121 // grab the CGContextRef | |
| 122 mCGContext = cairo_quartz_get_cg_context_with_clip(mSurfaceContext->GetCairo()); | |
| 123 CGContextScaleCTM(mCGContext, mBackingScale, mBackingScale); | |
| 124 CGContextTranslateCTM(mCGContext, -mNativeRect.X(), -mNativeRect.Y()); | |
| 125 } | |
| 126 | |
| 127 return mCGContext; | |
| 128 } | |
| 129 | |
| 130 void | |
| 131 gfxQuartzNativeDrawing::EndNativeDrawing() | |
| 132 { | |
| 133 NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing"); | |
| 134 | |
| 135 if (mBorrowedContext.cg) { | |
| 136 MOZ_ASSERT(!mContext->IsCairo()); | |
| 137 mBorrowedContext.Finish(); | |
| 138 if (mDrawTarget) { | |
| 139 DrawTarget *dest = mContext->GetDrawTarget(); | |
| 140 RefPtr<SourceSurface> source = mDrawTarget->Snapshot(); | |
| 141 | |
| 142 IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale), | |
| 143 NSToIntFloor(mNativeRect.height * mBackingScale)); | |
| 144 | |
| 145 Matrix oldTransform = dest->GetTransform(); | |
| 146 Matrix newTransform = oldTransform; | |
| 147 newTransform.Translate(mNativeRect.x, mNativeRect.y); | |
| 148 newTransform.Scale(1.0f / mBackingScale, 1.0f / mBackingScale); | |
| 149 | |
| 150 dest->SetTransform(newTransform); | |
| 151 | |
| 152 dest->DrawSurface(source, | |
| 153 gfx::Rect(0, 0, backingSize.width, backingSize.height), | |
| 154 gfx::Rect(0, 0, backingSize.width, backingSize.height)); | |
| 155 | |
| 156 | |
| 157 dest->SetTransform(oldTransform); | |
| 158 } | |
| 159 return; | |
| 160 } | |
| 161 | |
| 162 cairo_quartz_finish_cg_context_with_clip(mSurfaceContext->GetCairo()); | |
| 163 mQuartzSurface->MarkDirty(); | |
| 164 if (mSurfaceContext != mContext) { | |
| 165 gfxContextMatrixAutoSaveRestore save(mContext); | |
| 166 | |
| 167 // Copy back to destination | |
| 168 mContext->Translate(mNativeRect.TopLeft()); | |
| 169 mContext->Scale(1.0f / mBackingScale, 1.0f / mBackingScale); | |
| 170 mContext->DrawSurface(mQuartzSurface, mQuartzSurface->GetSize()); | |
| 171 } | |
| 172 } |
