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gfx/skia/trunk/src/image/SkSurface_Gpu.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/image/SkSurface_Gpu.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/*
michael@0	2	* Copyright 2012 Google Inc.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license that can be
michael@0	5	* found in the LICENSE file.
michael@0	6	*/
michael@0	7
michael@0	8	#include "SkSurface_Base.h"
michael@0	9	#include "SkImagePriv.h"
michael@0	10	#include "SkCanvas.h"
michael@0	11	#include "SkGpuDevice.h"
michael@0	12
michael@0	13	class SkSurface_Gpu : public SkSurface_Base {
michael@0	14	public:
michael@0	15	SK_DECLARE_INST_COUNT(SkSurface_Gpu)
michael@0	16
michael@0	17	SkSurface_Gpu(GrRenderTarget*);
michael@0	18	virtual ~SkSurface_Gpu();
michael@0	19
michael@0	20	virtual SkCanvas* onNewCanvas() SK_OVERRIDE;
michael@0	21	virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
michael@0	22	virtual SkImage* onNewImageSnapshot() SK_OVERRIDE;
michael@0	23	virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
michael@0	24	const SkPaint*) SK_OVERRIDE;
michael@0	25	virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
michael@0	26
michael@0	27	private:
michael@0	28	SkGpuDevice* fDevice;
michael@0	29
michael@0	30	typedef SkSurface_Base INHERITED;
michael@0	31	};
michael@0	32
michael@0	33	///////////////////////////////////////////////////////////////////////////////
michael@0	34
michael@0	35	SkSurface_Gpu::SkSurface_Gpu(GrRenderTarget* renderTarget)
michael@0	36	: INHERITED(renderTarget->width(), renderTarget->height()) {
michael@0	37	fDevice = SkNEW_ARGS(SkGpuDevice, (renderTarget->getContext(), renderTarget));
michael@0	38
michael@0	39	if (kRGB_565_GrPixelConfig != renderTarget->config()) {
michael@0	40	fDevice->clear(0x0);
michael@0	41	}
michael@0	42	}
michael@0	43
michael@0	44	SkSurface_Gpu::~SkSurface_Gpu() {
michael@0	45	SkSafeUnref(fDevice);
michael@0	46	}
michael@0	47
michael@0	48	SkCanvas* SkSurface_Gpu::onNewCanvas() {
michael@0	49	return SkNEW_ARGS(SkCanvas, (fDevice));
michael@0	50	}
michael@0	51
michael@0	52	SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
michael@0	53	GrRenderTarget* rt = fDevice->accessRenderTarget();
michael@0	54	int sampleCount = rt->numSamples();
michael@0	55	return SkSurface::NewRenderTarget(fDevice->context(), info, sampleCount);
michael@0	56	}
michael@0	57
michael@0	58	SkImage* SkSurface_Gpu::onNewImageSnapshot() {
michael@0	59	return SkImage::NewTexture(fDevice->accessBitmap(false));
michael@0	60	}
michael@0	61
michael@0	62	void SkSurface_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
michael@0	63	const SkPaint* paint) {
michael@0	64	canvas->drawBitmap(fDevice->accessBitmap(false), x, y, paint);
michael@0	65	}
michael@0	66
michael@0	67	// Create a new SkGpuDevice and, if necessary, copy the contents of the old
michael@0	68	// device into it. Note that this flushes the SkGpuDevice but
michael@0	69	// doesn't force an OpenGL flush.
michael@0	70	void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
michael@0	71	GrRenderTarget* rt = fDevice->accessRenderTarget();
michael@0	72	// are we sharing our render target with the image?
michael@0	73	SkASSERT(NULL != this->getCachedImage());
michael@0	74	if (rt->asTexture() == SkTextureImageGetTexture(this->getCachedImage())) {
michael@0	75	// We call createCompatibleDevice because it uses the texture cache. This isn't
michael@0	76	// necessarily correct (http://skbug.com/2252), but never using the cache causes
michael@0	77	// a Chromium regression. (http://crbug.com/344020)
michael@0	78	SkGpuDevice* newDevice = static_cast<SkGpuDevice*>(
michael@0	79	fDevice->createCompatibleDevice(fDevice->imageInfo()));
michael@0	80	SkAutoTUnref<SkGpuDevice> aurd(newDevice);
michael@0	81	if (kRetain_ContentChangeMode == mode) {
michael@0	82	fDevice->context()->copyTexture(rt->asTexture(), newDevice->accessRenderTarget());
michael@0	83	}
michael@0	84	SkASSERT(NULL != this->getCachedCanvas());
michael@0	85	SkASSERT(this->getCachedCanvas()->getDevice() == fDevice);
michael@0	86
michael@0	87	this->getCachedCanvas()->setRootDevice(newDevice);
michael@0	88	SkRefCnt_SafeAssign(fDevice, newDevice);
michael@0	89	}
michael@0	90	}
michael@0	91
michael@0	92	///////////////////////////////////////////////////////////////////////////////
michael@0	93
michael@0	94	SkSurface* SkSurface::NewRenderTargetDirect(GrRenderTarget* target) {
michael@0	95	if (NULL == target) {
michael@0	96	return NULL;
michael@0	97	}
michael@0	98	return SkNEW_ARGS(SkSurface_Gpu, (target));
michael@0	99	}
michael@0	100
michael@0	101	SkSurface* SkSurface::NewRenderTarget(GrContext* ctx, const SkImageInfo& info, int sampleCount) {
michael@0	102	if (NULL == ctx) {
michael@0	103	return NULL;
michael@0	104	}
michael@0	105
michael@0	106	SkBitmap::Config config = SkImageInfoToBitmapConfig(info);
michael@0	107
michael@0	108	GrTextureDesc desc;
michael@0	109	desc.fFlags = kRenderTarget_GrTextureFlagBit | kCheckAllocation_GrTextureFlagBit;
michael@0	110	desc.fWidth = info.fWidth;
michael@0	111	desc.fHeight = info.fHeight;
michael@0	112	desc.fConfig = SkBitmapConfig2GrPixelConfig(config);
michael@0	113	desc.fSampleCnt = sampleCount;
michael@0	114
michael@0	115	SkAutoTUnref<GrTexture> tex(ctx->createUncachedTexture(desc, NULL, 0));
michael@0	116	if (NULL == tex) {
michael@0	117	return NULL;
michael@0	118	}
michael@0	119
michael@0	120	return SkNEW_ARGS(SkSurface_Gpu, (tex->asRenderTarget()));
michael@0	121	}