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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 "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(SkGpuDevice* device)
: INHERITED(device->width(), device->height(), &device->surfaceProps())
, fDevice(SkRef(device)) {
}
SkSurface_Gpu::~SkSurface_Gpu() {
fDevice->unref();
}
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);
// legacy: need to dirty the bitmap's genID in our device (curse it)
surface->getDevice()->accessBitmap(false).notifyPixelsChanged();
break;
}
// Grab the render target *after* firing notifications, as it may get switched if CoW kicks in.
GrRenderTarget* rt = surface->getDevice()->accessRenderTarget();
rt->prepareForExternalIO();
return rt;
}
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, flags);
}
SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
GrRenderTarget* rt = fDevice->accessRenderTarget();
int sampleCount = rt->numColorSamples();
// TODO: Make caller specify this (change virtual signature of onNewSurface).
static const SkBudgeted kBudgeted = SkBudgeted::kNo;
return SkSurface::NewRenderTarget(fDevice->context(), kBudgeted, info, sampleCount,
&this->props());
}
SkImage* SkSurface_Gpu::onNewImageSnapshot(SkBudgeted budgeted, ForceCopyMode forceCopyMode) {
GrRenderTarget* rt = fDevice->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 (kYes_ForceCopyMode == forceCopyMode || !tex || rt->resourcePriv().isExternal()) {
GrSurfaceDesc desc = fDevice->accessRenderTarget()->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();
SkImage* image = nullptr;
if (tex) {
image = new SkImage_Gpu(info.width(), info.height(), kNeedNewImageUniqueID,
info.alphaType(), tex, 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->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.
SkAutoTUnref<SkImage> image(this->refCachedImage(SkBudgeted::kNo, kNo_ForceUnique));
SkASSERT(image);
if (rt->asTexture() == as_IB(image)->peekTexture()) {
this->fDevice->replaceRenderTarget(SkSurface::kRetain_ContentChangeMode == mode);
SkTextureImageApplyBudgetedDecision(image);
} else if (kDiscard_ContentChangeMode == mode) {
this->SkSurface_Gpu::onDiscard();
}
}
void SkSurface_Gpu::onDiscard() {
fDevice->accessRenderTarget()->discard();
}
void SkSurface_Gpu::onPrepareForExternalIO() {
fDevice->accessRenderTarget()->prepareForExternalIO();
}
///////////////////////////////////////////////////////////////////////////////
SkSurface* SkSurface::NewRenderTargetDirect(GrRenderTarget* target, const SkSurfaceProps* props) {
SkAutoTUnref<SkGpuDevice> device(
SkGpuDevice::Create(target, props, SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return new SkSurface_Gpu(device);
}
SkSurface* SkSurface::NewRenderTarget(GrContext* ctx, SkBudgeted budgeted, const SkImageInfo& info,
int sampleCount, const SkSurfaceProps* props,
GrTextureStorageAllocator customAllocator) {
SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(
ctx, budgeted, info, sampleCount, props, SkGpuDevice::kClear_InitContents,
customAllocator));
if (!device) {
return nullptr;
}
return new SkSurface_Gpu(device);
}
SkSurface* SkSurface::NewFromBackendTexture(GrContext* context, const GrBackendTextureDesc& desc,
const SkSurfaceProps* props) {
if (nullptr == context) {
return nullptr;
}
if (!SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag)) {
return nullptr;
}
SkAutoTUnref<GrSurface> surface(context->textureProvider()->wrapBackendTexture(desc,
kBorrow_GrWrapOwnership));
if (!surface) {
return nullptr;
}
SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(surface->asRenderTarget(), props,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return new SkSurface_Gpu(device);
}
SkSurface* SkSurface::NewFromBackendRenderTarget(GrContext* context,
const GrBackendRenderTargetDesc& desc,
const SkSurfaceProps* props) {
if (nullptr == context) {
return nullptr;
}
SkAutoTUnref<GrRenderTarget> rt(context->textureProvider()->wrapBackendRenderTarget(desc));
if (!rt) {
return nullptr;
}
SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(rt, props,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return new SkSurface_Gpu(device);
}
SkSurface* SkSurface::NewFromBackendTextureAsRenderTarget(GrContext* context,
const GrBackendTextureDesc& desc,
const SkSurfaceProps* props) {
if (nullptr == context) {
return nullptr;
}
SkAutoTUnref<GrRenderTarget> rt(
context->resourceProvider()->wrapBackendTextureAsRenderTarget(desc));
if (!rt) {
return nullptr;
}
SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(rt, props,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return nullptr;
}
return new SkSurface_Gpu(device);
}
#endif
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