src/gpu/GrResourceProvider.cpp - platform/external/skia - Git at Google

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "GrResourceProvider.h"

 #include "GrGpu.h"
 #include "GrIndexBuffer.h"
 #include "GrPathRendering.h"
 #include "GrRenderTarget.h"
 #include "GrRenderTargetPriv.h"
 #include "GrResourceCache.h"
 #include "GrResourceKey.h"
 #include "GrStencilAttachment.h"
 #include "GrVertexBuffer.h"

 GR_DECLARE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);

 GrResourceProvider::GrResourceProvider(GrGpu* gpu, GrResourceCache* cache, GrSingleOwner* owner)
     : INHERITED(gpu, cache, owner) {
     GR_DEFINE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);
     fQuadIndexBufferKey = gQuadIndexBufferKey;
 }

 const GrIndexBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16_t* pattern,
                                                                     int patternSize,
                                                                     int reps,
                                                                     int vertCount,
                                                                     const GrUniqueKey& key) {
     size_t bufferSize = patternSize * reps * sizeof(uint16_t);

     // This is typically used in GrBatchs, so we assume kNoPendingIO.
     GrIndexBuffer* buffer = this->createIndexBuffer(bufferSize, kStatic_BufferUsage,
                                                     kNoPendingIO_Flag);
     if (!buffer) {
         return nullptr;
     }
     uint16_t* data = (uint16_t*) buffer->map();
     bool useTempData = (nullptr == data);
     if (useTempData) {
         data = new uint16_t[reps * patternSize];
     }
     for (int i = 0; i < reps; ++i) {
         int baseIdx = i * patternSize;
         uint16_t baseVert = (uint16_t)(i * vertCount);
         for (int j = 0; j < patternSize; ++j) {
             data[baseIdx+j] = baseVert + pattern[j];
         }
     }
     if (useTempData) {
         if (!buffer->updateData(data, bufferSize)) {
             buffer->unref();
             return nullptr;
         }
         delete[] data;
     } else {
         buffer->unmap();
     }
     this->assignUniqueKeyToResource(key, buffer);
     return buffer;
 }

 const GrIndexBuffer* GrResourceProvider::createQuadIndexBuffer() {
     static const int kMaxQuads = 1 << 12; // max possible: (1 << 14) - 1;
     GR_STATIC_ASSERT(4 * kMaxQuads <= 65535);
     static const uint16_t kPattern[] = { 0, 1, 2, 0, 2, 3 };

     return this->createInstancedIndexBuffer(kPattern, 6, kMaxQuads, 4, fQuadIndexBufferKey);
 }

 GrPath* GrResourceProvider::createPath(const SkPath& path, const GrStrokeInfo& stroke) {
     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createPath(path, stroke);
 }

 GrPathRange* GrResourceProvider::createPathRange(GrPathRange::PathGenerator* gen,
                                                  const GrStrokeInfo& stroke) {
     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createPathRange(gen, stroke);
 }

 GrPathRange* GrResourceProvider::createGlyphs(const SkTypeface* tf, const SkDescriptor* desc,
                                               const GrStrokeInfo& stroke) {

     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createGlyphs(tf, desc, stroke);
 }

 GrIndexBuffer* GrResourceProvider::createIndexBuffer(size_t size, BufferUsage usage,
                                                      uint32_t flags) {
     if (this->isAbandoned()) {
         return nullptr;
     }

     bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
     bool dynamic = kDynamic_BufferUsage == usage;
     if (dynamic) {
         // bin by pow2 with a reasonable min
         static const uint32_t MIN_SIZE = 1 << 12;
         size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));

         GrScratchKey key;
         GrIndexBuffer::ComputeScratchKey(size, true, &key);
         uint32_t scratchFlags = 0;
         if (noPendingIO) {
             scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
         } else {
             scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
         }
         GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
         if (resource) {
             return static_cast<GrIndexBuffer*>(resource);
         }
     }
     return this->gpu()->createIndexBuffer(size, dynamic);
 }

 GrVertexBuffer* GrResourceProvider::createVertexBuffer(size_t size, BufferUsage usage,
                                                        uint32_t flags) {
     if (this->isAbandoned()) {
         return nullptr;
     }

     bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
     bool dynamic = kDynamic_BufferUsage == usage;
     if (dynamic) {
         // bin by pow2 with a reasonable min
         static const uint32_t MIN_SIZE = 1 << 12;
         size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));

         GrScratchKey key;
         GrVertexBuffer::ComputeScratchKey(size, true, &key);
         uint32_t scratchFlags = 0;
         if (noPendingIO) {
             scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
         } else {
             scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
         }
         GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
         if (resource) {
             return static_cast<GrVertexBuffer*>(resource);
         }
     }
     return this->gpu()->createVertexBuffer(size, dynamic);
 }

 GrTransferBuffer* GrResourceProvider::createTransferBuffer(size_t size, TransferType type,
                                                            uint32_t flags) {
     if (this->isAbandoned()) {
         return nullptr;
     }

     //bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
     return this->gpu()->createTransferBuffer(size, type);
 }

 GrBatchAtlas* GrResourceProvider::createAtlas(GrPixelConfig config,
                                               int width, int height,
                                               int numPlotsX, int numPlotsY,
                                               GrBatchAtlas::EvictionFunc func, void* data) {
     GrSurfaceDesc desc;
     desc.fFlags = kNone_GrSurfaceFlags;
     desc.fWidth = width;
     desc.fHeight = height;
     desc.fConfig = config;

     // We don't want to flush the context so we claim we're in the middle of flushing so as to
     // guarantee we do not recieve a texture with pending IO
     // TODO: Determine how to avoid having to do this. (https://bug.skia.org/4156)
     static const uint32_t kFlags = GrResourceProvider::kNoPendingIO_Flag;
     GrTexture* texture = this->createApproxTexture(desc, kFlags);
     if (!texture) {
         return nullptr;
     }
     GrBatchAtlas* atlas = new GrBatchAtlas(texture, numPlotsX, numPlotsY);
     atlas->registerEvictionCallback(func, data);
     return atlas;
 }

 GrStencilAttachment* GrResourceProvider::attachStencilAttachment(GrRenderTarget* rt) {
     SkASSERT(rt);
     if (rt->renderTargetPriv().getStencilAttachment()) {
         return rt->renderTargetPriv().getStencilAttachment();
     }

     if (!rt->wasDestroyed() && rt->canAttemptStencilAttachment()) {
         GrUniqueKey sbKey;

         int width = rt->width();
         int height = rt->height();
 #if 0
         if (this->caps()->oversizedStencilSupport()) {
             width  = SkNextPow2(width);
             height = SkNextPow2(height);
         }
 #endif
         bool newStencil = false;
         GrStencilAttachment::ComputeSharedStencilAttachmentKey(width, height,
                                                                rt->numStencilSamples(), &sbKey);
         GrStencilAttachment* stencil = static_cast<GrStencilAttachment*>(
             this->findAndRefResourceByUniqueKey(sbKey));
         if (!stencil) {
             // Need to try and create a new stencil
             stencil = this->gpu()->createStencilAttachmentForRenderTarget(rt, width, height);
             if (stencil) {
                 stencil->resourcePriv().setUniqueKey(sbKey);
                 newStencil = true;
             }
         }
         if (rt->renderTargetPriv().attachStencilAttachment(stencil)) {
             if (newStencil) {
                 // Right now we're clearing the stencil attachment here after it is
                 // attached to a RT for the first time. When we start matching
                 // stencil buffers with smaller color targets this will no longer
                 // be correct because it won't be guaranteed to clear the entire
                 // sb.
                 // We used to clear down in the GL subclass using a special purpose
                 // FBO. But iOS doesn't allow a stencil-only FBO. It reports unsupported
                 // FBO status.
                 this->gpu()->clearStencil(rt);
             }
         }
     }
     return rt->renderTargetPriv().getStencilAttachment();
 }

 GrRenderTarget* GrResourceProvider::wrapBackendTextureAsRenderTarget(
         const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
     if (this->isAbandoned()) {
         return nullptr;
     }
     return this->gpu()->wrapBackendTextureAsRenderTarget(desc, ownership);
 }
	/*
	* Copyright 2015 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "GrResourceProvider.h"

	#include "GrGpu.h"
	#include "GrIndexBuffer.h"
	#include "GrPathRendering.h"
	#include "GrRenderTarget.h"
	#include "GrRenderTargetPriv.h"
	#include "GrResourceCache.h"
	#include "GrResourceKey.h"
	#include "GrStencilAttachment.h"
	#include "GrVertexBuffer.h"

	GR_DECLARE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);

	GrResourceProvider::GrResourceProvider(GrGpu* gpu, GrResourceCache* cache, GrSingleOwner* owner)
	: INHERITED(gpu, cache, owner) {
	GR_DEFINE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);
	fQuadIndexBufferKey = gQuadIndexBufferKey;
	}

	const GrIndexBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16_t* pattern,
	int patternSize,
	int reps,
	int vertCount,
	const GrUniqueKey& key) {
	size_t bufferSize = patternSize * reps * sizeof(uint16_t);

	// This is typically used in GrBatchs, so we assume kNoPendingIO.
	GrIndexBuffer* buffer = this->createIndexBuffer(bufferSize, kStatic_BufferUsage,
	kNoPendingIO_Flag);
	if (!buffer) {
	return nullptr;
	}
	uint16_t* data = (uint16_t*) buffer->map();
	bool useTempData = (nullptr == data);
	if (useTempData) {
	data = new uint16_t[reps * patternSize];
	}
	for (int i = 0; i < reps; ++i) {
	int baseIdx = i * patternSize;
	uint16_t baseVert = (uint16_t)(i * vertCount);
	for (int j = 0; j < patternSize; ++j) {
	data[baseIdx+j] = baseVert + pattern[j];
	}
	}
	if (useTempData) {
	if (!buffer->updateData(data, bufferSize)) {
	buffer->unref();
	return nullptr;
	}
	delete[] data;
	} else {
	buffer->unmap();
	}
	this->assignUniqueKeyToResource(key, buffer);
	return buffer;
	}

	const GrIndexBuffer* GrResourceProvider::createQuadIndexBuffer() {
	static const int kMaxQuads = 1 << 12; // max possible: (1 << 14) - 1;
	GR_STATIC_ASSERT(4 * kMaxQuads <= 65535);
	static const uint16_t kPattern[] = { 0, 1, 2, 0, 2, 3 };

	return this->createInstancedIndexBuffer(kPattern, 6, kMaxQuads, 4, fQuadIndexBufferKey);
	}

	GrPath* GrResourceProvider::createPath(const SkPath& path, const GrStrokeInfo& stroke) {
	SkASSERT(this->gpu()->pathRendering());
	return this->gpu()->pathRendering()->createPath(path, stroke);
	}

	GrPathRange* GrResourceProvider::createPathRange(GrPathRange::PathGenerator* gen,
	const GrStrokeInfo& stroke) {
	SkASSERT(this->gpu()->pathRendering());
	return this->gpu()->pathRendering()->createPathRange(gen, stroke);
	}

	GrPathRange* GrResourceProvider::createGlyphs(const SkTypeface* tf, const SkDescriptor* desc,
	const GrStrokeInfo& stroke) {

	SkASSERT(this->gpu()->pathRendering());
	return this->gpu()->pathRendering()->createGlyphs(tf, desc, stroke);
	}

	GrIndexBuffer* GrResourceProvider::createIndexBuffer(size_t size, BufferUsage usage,
	uint32_t flags) {
	if (this->isAbandoned()) {
	return nullptr;
	}

	bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
	bool dynamic = kDynamic_BufferUsage == usage;
	if (dynamic) {
	// bin by pow2 with a reasonable min
	static const uint32_t MIN_SIZE = 1 << 12;
	size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));

	GrScratchKey key;
	GrIndexBuffer::ComputeScratchKey(size, true, &key);
	uint32_t scratchFlags = 0;
	if (noPendingIO) {
	scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
	} else {
	scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
	}
	GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
	if (resource) {
	return static_cast<GrIndexBuffer*>(resource);
	}
	}
	return this->gpu()->createIndexBuffer(size, dynamic);
	}

	GrVertexBuffer* GrResourceProvider::createVertexBuffer(size_t size, BufferUsage usage,
	uint32_t flags) {
	if (this->isAbandoned()) {
	return nullptr;
	}

	bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
	bool dynamic = kDynamic_BufferUsage == usage;
	if (dynamic) {
	// bin by pow2 with a reasonable min
	static const uint32_t MIN_SIZE = 1 << 12;
	size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));

	GrScratchKey key;
	GrVertexBuffer::ComputeScratchKey(size, true, &key);
	uint32_t scratchFlags = 0;
	if (noPendingIO) {
	scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
	} else {
	scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
	}
	GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
	if (resource) {
	return static_cast<GrVertexBuffer*>(resource);
	}
	}
	return this->gpu()->createVertexBuffer(size, dynamic);
	}

	GrTransferBuffer* GrResourceProvider::createTransferBuffer(size_t size, TransferType type,
	uint32_t flags) {
	if (this->isAbandoned()) {
	return nullptr;
	}

	//bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
	return this->gpu()->createTransferBuffer(size, type);
	}

	GrBatchAtlas* GrResourceProvider::createAtlas(GrPixelConfig config,
	int width, int height,
	int numPlotsX, int numPlotsY,
	GrBatchAtlas::EvictionFunc func, void* data) {
	GrSurfaceDesc desc;
	desc.fFlags = kNone_GrSurfaceFlags;
	desc.fWidth = width;
	desc.fHeight = height;
	desc.fConfig = config;

	// We don't want to flush the context so we claim we're in the middle of flushing so as to
	// guarantee we do not recieve a texture with pending IO
	// TODO: Determine how to avoid having to do this. (https://bug.skia.org/4156)
	static const uint32_t kFlags = GrResourceProvider::kNoPendingIO_Flag;
	GrTexture* texture = this->createApproxTexture(desc, kFlags);
	if (!texture) {
	return nullptr;
	}
	GrBatchAtlas* atlas = new GrBatchAtlas(texture, numPlotsX, numPlotsY);
	atlas->registerEvictionCallback(func, data);
	return atlas;
	}

	GrStencilAttachment* GrResourceProvider::attachStencilAttachment(GrRenderTarget* rt) {
	SkASSERT(rt);
	if (rt->renderTargetPriv().getStencilAttachment()) {
	return rt->renderTargetPriv().getStencilAttachment();
	}

	if (!rt->wasDestroyed() && rt->canAttemptStencilAttachment()) {
	GrUniqueKey sbKey;

	int width = rt->width();
	int height = rt->height();
	#if 0
	if (this->caps()->oversizedStencilSupport()) {
	width = SkNextPow2(width);
	height = SkNextPow2(height);
	}
	#endif
	bool newStencil = false;
	GrStencilAttachment::ComputeSharedStencilAttachmentKey(width, height,
	rt->numStencilSamples(), &sbKey);
	GrStencilAttachment* stencil = static_cast<GrStencilAttachment*>(
	this->findAndRefResourceByUniqueKey(sbKey));
	if (!stencil) {
	// Need to try and create a new stencil
	stencil = this->gpu()->createStencilAttachmentForRenderTarget(rt, width, height);
	if (stencil) {
	stencil->resourcePriv().setUniqueKey(sbKey);
	newStencil = true;
	}
	}
	if (rt->renderTargetPriv().attachStencilAttachment(stencil)) {
	if (newStencil) {
	// Right now we're clearing the stencil attachment here after it is
	// attached to a RT for the first time. When we start matching
	// stencil buffers with smaller color targets this will no longer
	// be correct because it won't be guaranteed to clear the entire
	// sb.
	// We used to clear down in the GL subclass using a special purpose
	// FBO. But iOS doesn't allow a stencil-only FBO. It reports unsupported
	// FBO status.
	this->gpu()->clearStencil(rt);
	}
	}
	}
	return rt->renderTargetPriv().getStencilAttachment();
	}

	GrRenderTarget* GrResourceProvider::wrapBackendTextureAsRenderTarget(
	const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
	if (this->isAbandoned()) {
	return nullptr;
	}
	return this->gpu()->wrapBackendTextureAsRenderTarget(desc, ownership);
	}