blob: d7d4ae7fd481f29eca1b3806f007cc7c4bc539e0 [file] [log] [blame]
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGpu.h"
#include "GrBufferAllocPool.h"
#include "GrContext.h"
#include "GrDrawTargetCaps.h"
#include "GrGpuResourcePriv.h"
#include "GrIndexBuffer.h"
#include "GrResourceCache.h"
#include "GrRenderTargetPriv.h"
#include "GrStencilBuffer.h"
#include "GrVertexBuffer.h"
////////////////////////////////////////////////////////////////////////////////
GrGpu::GrGpu(GrContext* context)
: fResetTimestamp(kExpiredTimestamp+1)
, fResetBits(kAll_GrBackendState)
, fQuadIndexBuffer(NULL)
, fGpuTraceMarkerCount(0)
, fContext(context) {
}
GrGpu::~GrGpu() {
SkSafeSetNull(fQuadIndexBuffer);
}
void GrGpu::contextAbandoned() {}
////////////////////////////////////////////////////////////////////////////////
GrTexture* GrGpu::createTexture(const GrSurfaceDesc& desc, bool budgeted,
const void* srcData, size_t rowBytes) {
if (!this->caps()->isConfigTexturable(desc.fConfig)) {
return NULL;
}
bool isRT = SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag);
if (isRT && !this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return NULL;
}
GrTexture *tex = NULL;
if (GrPixelConfigIsCompressed(desc.fConfig)) {
// We shouldn't be rendering into this
SkASSERT((desc.fFlags & kRenderTarget_GrSurfaceFlag) == 0);
if (!this->caps()->npotTextureTileSupport() &&
(!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight))) {
return NULL;
}
this->handleDirtyContext();
tex = this->onCreateCompressedTexture(desc, budgeted, srcData);
} else {
this->handleDirtyContext();
tex = this->onCreateTexture(desc, budgeted, srcData, rowBytes);
}
if (!this->caps()->reuseScratchTextures() && !isRT) {
tex->resourcePriv().removeScratchKey();
}
if (tex) {
fStats.incTextureCreates();
if (srcData) {
fStats.incTextureUploads();
}
}
return tex;
}
bool GrGpu::attachStencilBufferToRenderTarget(GrRenderTarget* rt) {
SkASSERT(NULL == rt->renderTargetPriv().getStencilBuffer());
GrUniqueKey sbKey;
int width = rt->width();
int height = rt->height();
#if 0
if (this->caps()->oversizedStencilSupport()) {
width = SkNextPow2(width);
height = SkNextPow2(height);
}
#endif
GrStencilBuffer::ComputeSharedStencilBufferKey(width, height, rt->numSamples(), &sbKey);
SkAutoTUnref<GrStencilBuffer> sb(static_cast<GrStencilBuffer*>(
this->getContext()->getResourceCache()->findAndRefUniqueResource(sbKey)));
if (sb) {
if (this->attachStencilBufferToRenderTarget(sb, rt)) {
rt->renderTargetPriv().didAttachStencilBuffer(sb);
return true;
}
return false;
}
if (this->createStencilBufferForRenderTarget(rt, width, height)) {
// Right now we're clearing the stencil buffer here after it is
// attached to an 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->clearStencil(rt);
GrStencilBuffer* sb = rt->renderTargetPriv().getStencilBuffer();
sb->resourcePriv().setUniqueKey(sbKey);
return true;
} else {
return false;
}
}
GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc) {
this->handleDirtyContext();
GrTexture* tex = this->onWrapBackendTexture(desc);
if (NULL == tex) {
return NULL;
}
// TODO: defer this and attach dynamically
GrRenderTarget* tgt = tex->asRenderTarget();
if (tgt && !this->attachStencilBufferToRenderTarget(tgt)) {
tex->unref();
return NULL;
} else {
return tex;
}
}
GrRenderTarget* GrGpu::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
this->handleDirtyContext();
return this->onWrapBackendRenderTarget(desc);
}
GrVertexBuffer* GrGpu::createVertexBuffer(size_t size, bool dynamic) {
this->handleDirtyContext();
return this->onCreateVertexBuffer(size, dynamic);
}
GrIndexBuffer* GrGpu::createIndexBuffer(size_t size, bool dynamic) {
this->handleDirtyContext();
return this->onCreateIndexBuffer(size, dynamic);
}
GrIndexBuffer* GrGpu::createInstancedIndexBuffer(const uint16_t* pattern,
int patternSize,
int reps,
int vertCount,
bool isDynamic) {
size_t bufferSize = patternSize * reps * sizeof(uint16_t);
GrGpu* me = const_cast<GrGpu*>(this);
GrIndexBuffer* buffer = me->createIndexBuffer(bufferSize, isDynamic);
if (buffer) {
uint16_t* data = (uint16_t*) buffer->map();
bool useTempData = (NULL == data);
if (useTempData) {
data = SkNEW_ARRAY(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)) {
SkFAIL("Can't get indices into buffer!");
}
SkDELETE_ARRAY(data);
} else {
buffer->unmap();
}
}
return buffer;
}
void GrGpu::clear(const SkIRect* rect,
GrColor color,
bool canIgnoreRect,
GrRenderTarget* renderTarget) {
SkASSERT(renderTarget);
this->handleDirtyContext();
this->onClear(renderTarget, rect, color, canIgnoreRect);
}
void GrGpu::clearStencilClip(const SkIRect& rect,
bool insideClip,
GrRenderTarget* renderTarget) {
SkASSERT(renderTarget);
this->handleDirtyContext();
this->onClearStencilClip(renderTarget, rect, insideClip);
}
bool GrGpu::readPixels(GrRenderTarget* target,
int left, int top, int width, int height,
GrPixelConfig config, void* buffer,
size_t rowBytes) {
this->handleDirtyContext();
return this->onReadPixels(target, left, top, width, height,
config, buffer, rowBytes);
}
bool GrGpu::writeTexturePixels(GrTexture* texture,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes) {
this->handleDirtyContext();
if (this->onWriteTexturePixels(texture, left, top, width, height,
config, buffer, rowBytes)) {
fStats.incTextureUploads();
return true;
}
return false;
}
void GrGpu::resolveRenderTarget(GrRenderTarget* target) {
SkASSERT(target);
this->handleDirtyContext();
this->onResolveRenderTarget(target);
}
typedef GrTraceMarkerSet::Iter TMIter;
void GrGpu::saveActiveTraceMarkers() {
if (this->caps()->gpuTracingSupport()) {
SkASSERT(0 == fStoredTraceMarkers.count());
fStoredTraceMarkers.addSet(fActiveTraceMarkers);
for (TMIter iter = fStoredTraceMarkers.begin(); iter != fStoredTraceMarkers.end(); ++iter) {
this->removeGpuTraceMarker(&(*iter));
}
}
}
void GrGpu::restoreActiveTraceMarkers() {
if (this->caps()->gpuTracingSupport()) {
SkASSERT(0 == fActiveTraceMarkers.count());
for (TMIter iter = fStoredTraceMarkers.begin(); iter != fStoredTraceMarkers.end(); ++iter) {
this->addGpuTraceMarker(&(*iter));
}
for (TMIter iter = fActiveTraceMarkers.begin(); iter != fActiveTraceMarkers.end(); ++iter) {
this->fStoredTraceMarkers.remove(*iter);
}
}
}
void GrGpu::addGpuTraceMarker(const GrGpuTraceMarker* marker) {
if (this->caps()->gpuTracingSupport()) {
SkASSERT(fGpuTraceMarkerCount >= 0);
this->fActiveTraceMarkers.add(*marker);
this->didAddGpuTraceMarker();
++fGpuTraceMarkerCount;
}
}
void GrGpu::removeGpuTraceMarker(const GrGpuTraceMarker* marker) {
if (this->caps()->gpuTracingSupport()) {
SkASSERT(fGpuTraceMarkerCount >= 1);
this->fActiveTraceMarkers.remove(*marker);
this->didRemoveGpuTraceMarker();
--fGpuTraceMarkerCount;
}
}
////////////////////////////////////////////////////////////////////////////////
static const int MAX_QUADS = 1 << 12; // max possible: (1 << 14) - 1;
GR_STATIC_ASSERT(4 * MAX_QUADS <= 65535);
static const uint16_t gQuadIndexPattern[] = {
0, 1, 2, 0, 2, 3
};
const GrIndexBuffer* GrGpu::getQuadIndexBuffer() const {
if (NULL == fQuadIndexBuffer || fQuadIndexBuffer->wasDestroyed()) {
SkSafeUnref(fQuadIndexBuffer);
GrGpu* me = const_cast<GrGpu*>(this);
fQuadIndexBuffer = me->createInstancedIndexBuffer(gQuadIndexPattern,
6,
MAX_QUADS,
4);
}
return fQuadIndexBuffer;
}
////////////////////////////////////////////////////////////////////////////////
void GrGpu::draw(const DrawArgs& args, const GrDrawTarget::DrawInfo& info) {
this->handleDirtyContext();
this->onDraw(args, info);
}
void GrGpu::stencilPath(const GrPath* path, const StencilPathState& state) {
this->handleDirtyContext();
this->onStencilPath(path, state);
}
void GrGpu::drawPath(const DrawArgs& args,
const GrPath* path,
const GrStencilSettings& stencilSettings) {
this->handleDirtyContext();
this->onDrawPath(args, path, stencilSettings);
}
void GrGpu::drawPaths(const DrawArgs& args,
const GrPathRange* pathRange,
const void* indices,
GrDrawTarget::PathIndexType indexType,
const float transformValues[],
GrDrawTarget::PathTransformType transformType,
int count,
const GrStencilSettings& stencilSettings) {
this->handleDirtyContext();
pathRange->willDrawPaths(indices, indexType, count);
this->onDrawPaths(args, pathRange, indices, indexType, transformValues,
transformType, count, stencilSettings);
}