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/*
* 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 "GrBuffer.h"
#include "GrCaps.h"
#include "GrContext.h"
#include "GrGpuResourcePriv.h"
#include "GrMesh.h"
#include "GrPathRendering.h"
#include "GrPipeline.h"
#include "GrResourceCache.h"
#include "GrResourceProvider.h"
#include "GrRenderTargetPriv.h"
#include "GrStencilAttachment.h"
#include "GrSurfacePriv.h"
#include "GrTexturePriv.h"
#include "SkMathPriv.h"
GrMesh& GrMesh::operator =(const GrMesh& di) {
fPrimitiveType = di.fPrimitiveType;
fStartVertex = di.fStartVertex;
fStartIndex = di.fStartIndex;
fVertexCount = di.fVertexCount;
fIndexCount = di.fIndexCount;
fInstanceCount = di.fInstanceCount;
fVerticesPerInstance = di.fVerticesPerInstance;
fIndicesPerInstance = di.fIndicesPerInstance;
fMaxInstancesPerDraw = di.fMaxInstancesPerDraw;
fVertexBuffer.reset(di.vertexBuffer());
fIndexBuffer.reset(di.indexBuffer());
return *this;
}
////////////////////////////////////////////////////////////////////////////////
GrGpu::GrGpu(GrContext* context)
: fResetTimestamp(kExpiredTimestamp+1)
, fResetBits(kAll_GrBackendState)
, fContext(context) {
fMultisampleSpecs.emplace_back(0, 0, nullptr); // Index 0 is an invalid unique id.
}
GrGpu::~GrGpu() {}
void GrGpu::disconnect(DisconnectType) {}
////////////////////////////////////////////////////////////////////////////////
bool GrGpu::makeCopyForTextureParams(int width, int height, const GrTextureParams& textureParams,
GrTextureProducer::CopyParams* copyParams) const {
const GrCaps& caps = *this->caps();
if (textureParams.isTiled() && !caps.npotTextureTileSupport() &&
(!SkIsPow2(width) || !SkIsPow2(height))) {
copyParams->fWidth = GrNextPow2(width);
copyParams->fHeight = GrNextPow2(height);
switch (textureParams.filterMode()) {
case GrTextureParams::kNone_FilterMode:
copyParams->fFilter = GrTextureParams::kNone_FilterMode;
break;
case GrTextureParams::kBilerp_FilterMode:
case GrTextureParams::kMipMap_FilterMode:
// We are only ever scaling up so no reason to ever indicate kMipMap.
copyParams->fFilter = GrTextureParams::kBilerp_FilterMode;
break;
}
return true;
}
return false;
}
static GrSurfaceOrigin resolve_origin(GrSurfaceOrigin origin, bool renderTarget) {
// By default, GrRenderTargets are GL's normal orientation so that they
// can be drawn to by the outside world without the client having
// to render upside down.
if (kDefault_GrSurfaceOrigin == origin) {
return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
} else {
return origin;
}
}
/**
* Prior to creating a texture, make sure the type of texture being created is
* supported by calling check_texture_creation_params.
*
* @param caps The capabilities of the GL device.
* @param desc The descriptor of the texture to create.
* @param isRT Indicates if the texture can be a render target.
*/
static bool check_texture_creation_params(const GrCaps& caps, const GrSurfaceDesc& desc,
bool* isRT, const SkTArray<GrMipLevel>& texels) {
if (!caps.isConfigTexturable(desc.fConfig)) {
return false;
}
*isRT = SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag);
if (*isRT && !caps.isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return false;
}
// We currently do not support multisampled textures
if (!*isRT && desc.fSampleCnt > 0) {
return false;
}
if (*isRT) {
int maxRTSize = caps.maxRenderTargetSize();
if (desc.fWidth > maxRTSize || desc.fHeight > maxRTSize) {
return false;
}
} else {
int maxSize = caps.maxTextureSize();
if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
return false;
}
}
for (int i = 0; i < texels.count(); ++i) {
if (!texels[i].fPixels) {
return false;
}
}
return true;
}
GrTexture* GrGpu::createTexture(const GrSurfaceDesc& origDesc, SkBudgeted budgeted,
const SkTArray<GrMipLevel>& texels) {
GrSurfaceDesc desc = origDesc;
const GrCaps* caps = this->caps();
bool isRT = false;
bool textureCreationParamsValid = check_texture_creation_params(*caps, desc, &isRT, texels);
if (!textureCreationParamsValid) {
return nullptr;
}
desc.fSampleCnt = SkTMin(desc.fSampleCnt, caps->maxSampleCount());
// Attempt to catch un- or wrongly intialized sample counts;
SkASSERT(desc.fSampleCnt >= 0 && desc.fSampleCnt <= 64);
desc.fOrigin = resolve_origin(desc.fOrigin, isRT);
GrTexture* tex = nullptr;
if (GrPixelConfigIsCompressed(desc.fConfig)) {
// We shouldn't be rendering into this
SkASSERT(!isRT);
SkASSERT(0 == desc.fSampleCnt);
if (!caps->npotTextureTileSupport() &&
(!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight))) {
return nullptr;
}
this->handleDirtyContext();
tex = this->onCreateCompressedTexture(desc, budgeted, texels);
} else {
this->handleDirtyContext();
tex = this->onCreateTexture(desc, budgeted, texels);
}
if (tex) {
if (!caps->reuseScratchTextures() && !isRT) {
tex->resourcePriv().removeScratchKey();
}
fStats.incTextureCreates();
if (!texels.empty()) {
if (texels[0].fPixels) {
fStats.incTextureUploads();
}
}
// This is a current work around to get discards into newly created textures. Once we are in
// MDB world, we should remove this code a rely on the draw target having specified load
// operations.
if (isRT && texels.empty()) {
GrRenderTarget* rt = tex->asRenderTarget();
SkASSERT(rt);
rt->discard();
}
}
return tex;
}
GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
this->handleDirtyContext();
if (!this->caps()->isConfigTexturable(desc.fConfig)) {
return nullptr;
}
if ((desc.fFlags & kRenderTarget_GrBackendTextureFlag) &&
!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return nullptr;
}
int maxSize = this->caps()->maxTextureSize();
if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
return nullptr;
}
GrTexture* tex = this->onWrapBackendTexture(desc, ownership);
if (nullptr == tex) {
return nullptr;
}
// TODO: defer this and attach dynamically
GrRenderTarget* tgt = tex->asRenderTarget();
if (tgt && !fContext->resourceProvider()->attachStencilAttachment(tgt)) {
tex->unref();
return nullptr;
} else {
return tex;
}
}
GrRenderTarget* GrGpu::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc,
GrWrapOwnership ownership) {
if (!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return nullptr;
}
this->handleDirtyContext();
return this->onWrapBackendRenderTarget(desc, ownership);
}
GrRenderTarget* GrGpu::wrapBackendTextureAsRenderTarget(const GrBackendTextureDesc& desc) {
this->handleDirtyContext();
if (!(desc.fFlags & kRenderTarget_GrBackendTextureFlag)) {
return nullptr;
}
if (!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return nullptr;
}
int maxSize = this->caps()->maxTextureSize();
if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
return nullptr;
}
return this->onWrapBackendTextureAsRenderTarget(desc);
}
GrBuffer* GrGpu::createBuffer(size_t size, GrBufferType intendedType,
GrAccessPattern accessPattern, const void* data) {
this->handleDirtyContext();
GrBuffer* buffer = this->onCreateBuffer(size, intendedType, accessPattern, data);
if (!this->caps()->reuseScratchBuffers()) {
buffer->resourcePriv().removeScratchKey();
}
return buffer;
}
gr_instanced::InstancedRendering* GrGpu::createInstancedRendering() {
SkASSERT(GrCaps::InstancedSupport::kNone != this->caps()->instancedSupport());
return this->onCreateInstancedRendering();
}
bool GrGpu::copySurface(GrSurface* dst,
GrSurface* src,
const SkIRect& srcRect,
const SkIPoint& dstPoint) {
SkASSERT(dst && src);
this->handleDirtyContext();
return this->onCopySurface(dst, src, srcRect, dstPoint);
}
bool GrGpu::getReadPixelsInfo(GrSurface* srcSurface, int width, int height, size_t rowBytes,
GrPixelConfig readConfig, DrawPreference* drawPreference,
ReadPixelTempDrawInfo* tempDrawInfo) {
SkASSERT(drawPreference);
SkASSERT(tempDrawInfo);
SkASSERT(kGpuPrefersDraw_DrawPreference != *drawPreference);
// We currently do not support reading into a compressed buffer
if (GrPixelConfigIsCompressed(readConfig)) {
return false;
}
// We currently do not support reading into the packed formats 565 or 4444 as they are not
// required to have read back support on all devices and backends.
if (kRGB_565_GrPixelConfig == readConfig || kRGBA_4444_GrPixelConfig == readConfig) {
return false;
}
if (!this->onGetReadPixelsInfo(srcSurface, width, height, rowBytes, readConfig, drawPreference,
tempDrawInfo)) {
return false;
}
// Check to see if we're going to request that the caller draw when drawing is not possible.
if (!srcSurface->asTexture() ||
!this->caps()->isConfigRenderable(tempDrawInfo->fTempSurfaceDesc.fConfig, false)) {
// If we don't have a fallback to a straight read then fail.
if (kRequireDraw_DrawPreference == *drawPreference) {
return false;
}
*drawPreference = kNoDraw_DrawPreference;
}
return true;
}
bool GrGpu::getWritePixelsInfo(GrSurface* dstSurface, int width, int height,
GrPixelConfig srcConfig, DrawPreference* drawPreference,
WritePixelTempDrawInfo* tempDrawInfo) {
SkASSERT(drawPreference);
SkASSERT(tempDrawInfo);
SkASSERT(kGpuPrefersDraw_DrawPreference != *drawPreference);
if (GrPixelConfigIsCompressed(dstSurface->desc().fConfig) &&
dstSurface->desc().fConfig != srcConfig) {
return false;
}
if (SkToBool(dstSurface->asRenderTarget())) {
if (this->caps()->useDrawInsteadOfAllRenderTargetWrites()) {
ElevateDrawPreference(drawPreference, kRequireDraw_DrawPreference);
} else if (this->caps()->useDrawInsteadOfPartialRenderTargetWrite() &&
(width < dstSurface->width() || height < dstSurface->height())) {
ElevateDrawPreference(drawPreference, kRequireDraw_DrawPreference);
}
}
if (!this->onGetWritePixelsInfo(dstSurface, width, height, srcConfig, drawPreference,
tempDrawInfo)) {
return false;
}
// Check to see if we're going to request that the caller draw when drawing is not possible.
if (!dstSurface->asRenderTarget() ||
!this->caps()->isConfigTexturable(tempDrawInfo->fTempSurfaceDesc.fConfig)) {
// If we don't have a fallback to a straight upload then fail.
if (kRequireDraw_DrawPreference == *drawPreference ||
!this->caps()->isConfigTexturable(srcConfig)) {
return false;
}
*drawPreference = kNoDraw_DrawPreference;
}
return true;
}
bool GrGpu::readPixels(GrSurface* surface,
int left, int top, int width, int height,
GrPixelConfig config, void* buffer,
size_t rowBytes) {
this->handleDirtyContext();
// We cannot read pixels into a compressed buffer
if (GrPixelConfigIsCompressed(config)) {
return false;
}
size_t bpp = GrBytesPerPixel(config);
if (!GrSurfacePriv::AdjustReadPixelParams(surface->width(), surface->height(), bpp,
&left, &top, &width, &height,
&buffer,
&rowBytes)) {
return false;
}
return this->onReadPixels(surface,
left, top, width, height,
config, buffer,
rowBytes);
}
bool GrGpu::writePixels(GrSurface* surface,
int left, int top, int width, int height,
GrPixelConfig config, const SkTArray<GrMipLevel>& texels) {
if (!surface) {
return false;
}
for (int currentMipLevel = 0; currentMipLevel < texels.count(); currentMipLevel++) {
if (!texels[currentMipLevel].fPixels ) {
return false;
}
}
this->handleDirtyContext();
if (this->onWritePixels(surface, left, top, width, height, config, texels)) {
SkIRect rect = SkIRect::MakeXYWH(left, top, width, height);
this->didWriteToSurface(surface, &rect, texels.count());
fStats.incTextureUploads();
return true;
}
return false;
}
bool GrGpu::writePixels(GrSurface* surface,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes) {
GrMipLevel mipLevel;
mipLevel.fPixels = buffer;
mipLevel.fRowBytes = rowBytes;
SkSTArray<1, GrMipLevel> texels;
texels.push_back(mipLevel);
return this->writePixels(surface, left, top, width, height, config, texels);
}
bool GrGpu::transferPixels(GrSurface* surface,
int left, int top, int width, int height,
GrPixelConfig config, GrBuffer* transferBuffer,
size_t offset, size_t rowBytes, GrFence* fence) {
SkASSERT(transferBuffer);
SkASSERT(fence);
this->handleDirtyContext();
if (this->onTransferPixels(surface, left, top, width, height, config,
transferBuffer, offset, rowBytes)) {
SkIRect rect = SkIRect::MakeXYWH(left, top, width, height);
this->didWriteToSurface(surface, &rect);
fStats.incTransfersToTexture();
if (*fence) {
this->deleteFence(*fence);
}
*fence = this->insertFence();
return true;
}
return false;
}
void GrGpu::resolveRenderTarget(GrRenderTarget* target) {
SkASSERT(target);
this->handleDirtyContext();
this->onResolveRenderTarget(target);
}
void GrGpu::didWriteToSurface(GrSurface* surface, const SkIRect* bounds, uint32_t mipLevels) const {
SkASSERT(surface);
// Mark any MIP chain and resolve buffer as dirty if and only if there is a non-empty bounds.
if (nullptr == bounds || !bounds->isEmpty()) {
if (GrRenderTarget* target = surface->asRenderTarget()) {
target->flagAsNeedingResolve(bounds);
}
GrTexture* texture = surface->asTexture();
if (texture && 1 == mipLevels) {
texture->texturePriv().dirtyMipMaps(true);
}
}
}
const GrGpu::MultisampleSpecs& GrGpu::getMultisampleSpecs(GrRenderTarget* rt,
const GrStencilSettings& stencil) {
SkASSERT(rt->desc().fSampleCnt > 1);
#ifndef SK_DEBUG
// In debug mode we query the multisample info every time to verify the caching is correct.
if (uint8_t id = rt->renderTargetPriv().accessMultisampleSpecsID()) {
SkASSERT(id > 0 && id < fMultisampleSpecs.count());
return fMultisampleSpecs[id];
}
#endif
int effectiveSampleCnt;
SkSTArray<16, SkPoint, true> pattern;
this->onGetMultisampleSpecs(rt, stencil, &effectiveSampleCnt, &pattern);
SkASSERT(effectiveSampleCnt >= rt->desc().fSampleCnt);
uint8_t id;
if (this->caps()->sampleLocationsSupport()) {
SkASSERT(pattern.count() == effectiveSampleCnt);
const auto& insertResult = fMultisampleSpecsIdMap.insert(
MultisampleSpecsIdMap::value_type(pattern, SkTMin(fMultisampleSpecs.count(), 255)));
id = insertResult.first->second;
if (insertResult.second) {
// This means the insert did not find the pattern in the map already, and therefore an
// actual insertion took place. (We don't expect to see many unique sample patterns.)
const SkPoint* sampleLocations = insertResult.first->first.begin();
SkASSERT(id == fMultisampleSpecs.count());
fMultisampleSpecs.emplace_back(id, effectiveSampleCnt, sampleLocations);
}
} else {
id = effectiveSampleCnt;
for (int i = fMultisampleSpecs.count(); i <= id; ++i) {
fMultisampleSpecs.emplace_back(i, i, nullptr);
}
}
SkASSERT(id > 0);
SkASSERT(!rt->renderTargetPriv().accessMultisampleSpecsID() ||
rt->renderTargetPriv().accessMultisampleSpecsID() == id);
rt->renderTargetPriv().accessMultisampleSpecsID() = id;
return fMultisampleSpecs[id];
}
bool GrGpu::SamplePatternComparator::operator()(const SamplePattern& a,
const SamplePattern& b) const {
if (a.count() != b.count()) {
return a.count() < b.count();
}
for (int i = 0; i < a.count(); ++i) {
// This doesn't have geometric meaning. We just need to define an ordering for std::map.
if (a[i].x() != b[i].x()) {
return a[i].x() < b[i].x();
}
if (a[i].y() != b[i].y()) {
return a[i].y() < b[i].y();
}
}
return false; // Equal.
}
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