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/*
* 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 "GrBuffer.h"
#include "GrCaps.h"
#include "GrGpu.h"
#include "GrPathRendering.h"
#include "GrRenderTarget.h"
#include "GrRenderTargetPriv.h"
#include "GrResourceCache.h"
#include "GrResourceKey.h"
#include "GrStencilAttachment.h"
#include "SkMathPriv.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 GrBuffer* 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 GrMeshDrawOps, so we assume kNoPendingIO.
GrBuffer* buffer = this->createBuffer(bufferSize, kIndex_GrBufferType, kStatic_GrAccessPattern,
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 GrBuffer* 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 GrStyle& style) {
SkASSERT(this->gpu()->pathRendering());
return this->gpu()->pathRendering()->createPath(path, style);
}
GrPathRange* GrResourceProvider::createPathRange(GrPathRange::PathGenerator* gen,
const GrStyle& style) {
SkASSERT(this->gpu()->pathRendering());
return this->gpu()->pathRendering()->createPathRange(gen, style);
}
GrPathRange* GrResourceProvider::createGlyphs(const SkTypeface* tf,
const SkScalerContextEffects& effects,
const SkDescriptor* desc,
const GrStyle& style) {
SkASSERT(this->gpu()->pathRendering());
return this->gpu()->pathRendering()->createGlyphs(tf, effects, desc, style);
}
GrBuffer* GrResourceProvider::createBuffer(size_t size, GrBufferType intendedType,
GrAccessPattern accessPattern, uint32_t flags,
const void* data) {
if (this->isAbandoned()) {
return nullptr;
}
if (kDynamic_GrAccessPattern != accessPattern) {
return this->gpu()->createBuffer(size, intendedType, accessPattern, data);
}
if (!(flags & kRequireGpuMemory_Flag) &&
this->gpu()->caps()->preferClientSideDynamicBuffers() &&
GrBufferTypeIsVertexOrIndex(intendedType) &&
kDynamic_GrAccessPattern == accessPattern) {
return GrBuffer::CreateCPUBacked(this->gpu(), size, intendedType, data);
}
// bin by pow2 with a reasonable min
static const size_t MIN_SIZE = 1 << 12;
size_t allocSize = SkTMax(MIN_SIZE, GrNextSizePow2(size));
GrScratchKey key;
GrBuffer::ComputeScratchKeyForDynamicVBO(allocSize, intendedType, &key);
uint32_t scratchFlags = 0;
if (flags & kNoPendingIO_Flag) {
scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
} else {
scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
}
GrBuffer* buffer = static_cast<GrBuffer*>(
this->cache()->findAndRefScratchResource(key, allocSize, scratchFlags));
if (!buffer) {
buffer = this->gpu()->createBuffer(allocSize, intendedType, kDynamic_GrAccessPattern);
if (!buffer) {
return nullptr;
}
}
if (data) {
buffer->updateData(data, size);
}
SkASSERT(!buffer->isCPUBacked()); // We should only cache real VBOs.
return buffer;
}
std::unique_ptr<GrDrawOpAtlas> GrResourceProvider::makeAtlas(GrPixelConfig config, int width,
int height, int numPlotsX,
int numPlotsY,
GrDrawOpAtlas::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;
sk_sp<GrTexture> texture(this->createApproxTexture(desc, kFlags));
if (!texture) {
return nullptr;
}
std::unique_ptr<GrDrawOpAtlas> atlas(
new GrDrawOpAtlas(std::move(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();
}
sk_sp<GrRenderTarget> GrResourceProvider::wrapBackendTextureAsRenderTarget(
const GrBackendTextureDesc& desc)
{
if (this->isAbandoned()) {
return nullptr;
}
return this->gpu()->wrapBackendTextureAsRenderTarget(desc);
}
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