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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSurface_Gpu.h"
#include "GrContextPriv.h"
#include "GrResourceProvider.h"
#include "SkCanvas.h"
#include "SkGpuDevice.h"
#include "SkImage_Base.h"
#include "SkImage_Gpu.h"
#include "SkImagePriv.h"
#include "SkSurface_Base.h"
#if SK_SUPPORT_GPU
SkSurface_Gpu::SkSurface_Gpu(sk_sp<SkGpuDevice> device)
: INHERITED(device->width(), device->height(), &device->surfaceProps())
, fDevice(std::move(device)) {
}
SkSurface_Gpu::~SkSurface_Gpu() {
}
static GrRenderTarget* prepare_rt_for_external_access(SkSurface_Gpu* surface,
SkSurface::BackendHandleAccess access) {
switch (access) {
case SkSurface::kFlushRead_BackendHandleAccess:
break;
case SkSurface::kFlushWrite_BackendHandleAccess:
case SkSurface::kDiscardWrite_BackendHandleAccess:
// for now we don't special-case on Discard, but we may in the future.
surface->notifyContentWillChange(SkSurface::kRetain_ContentChangeMode);
break;
}
// Grab the render target *after* firing notifications, as it may get switched if CoW kicks in.
surface->getDevice()->flush();
GrDrawContext* dc = surface->getDevice()->accessDrawContext();
return dc->accessRenderTarget();
}
GrBackendObject SkSurface_Gpu::onGetTextureHandle(BackendHandleAccess access) {
GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
GrTexture* texture = rt->asTexture();
if (texture) {
return texture->getTextureHandle();
}
return 0;
}
bool SkSurface_Gpu::onGetRenderTargetHandle(GrBackendObject* obj, BackendHandleAccess access) {
GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
*obj = rt->getRenderTargetHandle();
return true;
}
SkCanvas* SkSurface_Gpu::onNewCanvas() {
SkCanvas::InitFlags flags = SkCanvas::kDefault_InitFlags;
flags = static_cast<SkCanvas::InitFlags>(flags | SkCanvas::kConservativeRasterClip_InitFlag);
return new SkCanvas(fDevice.get(), flags);
}
sk_sp<SkSurface> SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
int sampleCount = fDevice->accessDrawContext()->numColorSamples();
GrSurfaceOrigin origin = fDevice->accessDrawContext()->origin();
// TODO: Make caller specify this (change virtual signature of onNewSurface).
static const SkBudgeted kBudgeted = SkBudgeted::kNo;
return SkSurface::MakeRenderTarget(fDevice->context(), kBudgeted, info, sampleCount,
origin, &this->props());
}
sk_sp<SkImage> SkSurface_Gpu::onNewImageSnapshot(SkBudgeted budgeted, SkCopyPixelsMode cpm) {
GrRenderTarget* rt = fDevice->accessDrawContext()->accessRenderTarget();
SkASSERT(rt);
GrTexture* tex = rt->asTexture();
SkAutoTUnref<GrTexture> copy;
// If the original render target is a buffer originally created by the client, then we don't
// want to ever retarget the SkSurface at another buffer we create. Force a copy now to avoid
// copy-on-write.
if (kAlways_SkCopyPixelsMode == cpm || !tex || rt->resourcePriv().refsWrappedObjects()) {
GrSurfaceDesc desc = fDevice->accessDrawContext()->desc();
GrContext* ctx = fDevice->context();
desc.fFlags = desc.fFlags & ~kRenderTarget_GrSurfaceFlag;
copy.reset(ctx->textureProvider()->createTexture(desc, budgeted));
if (!copy) {
return nullptr;
}
if (!ctx->copySurface(copy, rt)) {
return nullptr;
}
tex = copy;
}
const SkImageInfo info = fDevice->imageInfo();
sk_sp<SkImage> image;
if (tex) {
image = sk_make_sp<SkImage_Gpu>(info.width(), info.height(), kNeedNewImageUniqueID,
info.alphaType(), tex, sk_ref_sp(info.colorSpace()),
budgeted);
}
return image;
}
// Create a new render target and, if necessary, copy the contents of the old
// render target into it. Note that this flushes the SkGpuDevice but
// doesn't force an OpenGL flush.
void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
GrRenderTarget* rt = fDevice->accessDrawContext()->accessRenderTarget();
// are we sharing our render target with the image? Note this call should never create a new
// image because onCopyOnWrite is only called when there is a cached image.
sk_sp<SkImage> image(this->refCachedImage(SkBudgeted::kNo, kNo_ForceUnique));
SkASSERT(image);
if (rt->asTexture() == as_IB(image)->peekTexture()) {
this->fDevice->replaceDrawContext(SkSurface::kRetain_ContentChangeMode == mode);
SkTextureImageApplyBudgetedDecision(image.get());
} else if (kDiscard_ContentChangeMode == mode) {
this->SkSurface_Gpu::onDiscard();
}
}
void SkSurface_Gpu::onDiscard() {
fDevice->accessDrawContext()->discard();
}
void SkSurface_Gpu::onPrepareForExternalIO() {
fDevice->flush();
}
///////////////////////////////////////////////////////////////////////////////
bool SkSurface_Gpu::Valid(const SkImageInfo& info) {
switch (info.colorType()) {
case kRGBA_F16_SkColorType:
return info.colorSpace() && info.colorSpace()->gammaIsLinear();
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType:
return !info.colorSpace() || info.colorSpace()->gammaCloseToSRGB();
default:
return !info.colorSpace();
}
}
bool SkSurface_Gpu::Valid(GrContext* context, GrPixelConfig config, SkColorSpace* colorSpace) {
switch (config) {
case kRGBA_half_GrPixelConfig:
return colorSpace && colorSpace->gammaIsLinear();
case kSRGBA_8888_GrPixelConfig:
case kSBGRA_8888_GrPixelConfig:
return context->caps()->srgbSupport() && colorSpace && colorSpace->gammaCloseToSRGB();
case kRGBA_8888_GrPixelConfig:
case kBGRA_8888_GrPixelConfig:
// If we don't have sRGB support, we may get here with a color space. It still needs
// to be sRGB-like (so that the application will work correctly on sRGB devices.)
return !colorSpace ||
(!context->caps()->srgbSupport() && colorSpace->gammaCloseToSRGB());
default:
return !colorSpace;
}
}
sk_sp<SkSurface> SkSurface::MakeRenderTarget(GrContext* ctx, SkBudgeted budgeted,
const SkImageInfo& info, int sampleCount,
GrSurfaceOrigin origin, const SkSurfaceProps* props) {
if (!SkSurface_Gpu::Valid(info)) {
return nullptr;
}
sk_sp<SkGpuDevice> device(SkGpuDevice::Make(
ctx, budgeted, info, sampleCount, origin, props, SkGpuDevice::kClear_InitContents));
if (!device) {
return nullptr;
}
return sk_make_sp<SkSurface_Gpu>(std::move(device));
}
sk_sp<SkSurface> SkSurface::MakeFromBackendTexture(GrContext* context,
const GrBackendTextureDesc& desc,
sk_sp<SkColorSpace> colorSpace,
const SkSurfaceProps* props) {
if (!context) {
return nullptr;
}
if (!SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag)) {
return nullptr;
}
if (!SkSurface_Gpu::Valid(context, desc.fConfig, colorSpace.get())) {
return nullptr;
}
sk_sp<GrDrawContext> dc(context->contextPriv().makeBackendTextureDrawContext(
desc,
std::move(colorSpace),
props,
kBorrow_GrWrapOwnership));
if (!dc) {
return nullptr;
}
sk_sp<SkGpuDevice> device(SkGpuDevice::Make(std::move(dc), desc.fWidth, desc.fHeight,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return sk_make_sp<SkSurface_Gpu>(std::move(device));
}
sk_sp<SkSurface> SkSurface::MakeFromBackendRenderTarget(GrContext* context,
const GrBackendRenderTargetDesc& desc,
sk_sp<SkColorSpace> colorSpace,
const SkSurfaceProps* props) {
if (!context) {
return nullptr;
}
if (!SkSurface_Gpu::Valid(context, desc.fConfig, colorSpace.get())) {
return nullptr;
}
sk_sp<GrDrawContext> dc(context->contextPriv().makeBackendRenderTargetDrawContext(
desc,
std::move(colorSpace),
props));
if (!dc) {
return nullptr;
}
sk_sp<SkGpuDevice> device(SkGpuDevice::Make(std::move(dc), desc.fWidth, desc.fHeight,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return sk_make_sp<SkSurface_Gpu>(std::move(device));
}
sk_sp<SkSurface> SkSurface::MakeFromBackendTextureAsRenderTarget(GrContext* context,
const GrBackendTextureDesc& desc,
sk_sp<SkColorSpace> colorSpace,
const SkSurfaceProps* props) {
if (!context) {
return nullptr;
}
if (!SkSurface_Gpu::Valid(context, desc.fConfig, colorSpace.get())) {
return nullptr;
}
sk_sp<GrDrawContext> dc(context->contextPriv().makeBackendTextureAsRenderTargetDrawContext(
desc,
std::move(colorSpace),
props));
if (!dc) {
return nullptr;
}
sk_sp<SkGpuDevice> device(SkGpuDevice::Make(std::move(dc), desc.fWidth, desc.fHeight,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return sk_make_sp<SkSurface_Gpu>(std::move(device));
}
#endif