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Make the SwapChain interface match webgpu.h

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This changes the methods of Dawn's SwapChain to match webgpu.h, namely
Present() now doesn't take arguments, and GetNextTexture() is replaced
with GetCurrentTextureView().

BUG=dawn:269

Change-Id: Ia0debefb170caf799c3310b1dad5535c4c5f59ca
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13441
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
This commit is contained in:
Corentin Wallez
2019-11-12 18:30:11 +00:00
committed by Commit Bot service account
parent 700cfe7664
commit 604072bc2e
8 changed files with 53 additions and 47 deletions
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44
src/dawn_native/SwapChain.cpp
View File

@@ -99,12 +99,21 @@ namespace dawn_native {
static_cast<WGPUTextureUsage>(allowedUsage), width, height);
}
TextureBase* SwapChainBase::GetNextTexture() {
if (GetDevice()->ConsumedError(ValidateGetNextTexture())) {
return TextureBase::MakeError(GetDevice());
TextureViewBase* SwapChainBase::GetCurrentTextureView() {
if (GetDevice()->ConsumedError(ValidateGetCurrentTextureView())) {
return TextureViewBase::MakeError(GetDevice());
}
ASSERT(!IsError());
// Return the same current texture view until Present is called.
if (mCurrentTextureView.Get() != nullptr) {
// Calling GetCurrentTextureView always returns a new reference so add it even when
// reuse the existing texture view.
mCurrentTextureView->Reference();
return mCurrentTextureView.Get();
}
// Create the backing texture and the view.
TextureDescriptor descriptor;
descriptor.dimension = wgpu::TextureDimension::e2D;
descriptor.size.width = mWidth;
@@ -116,21 +125,28 @@ namespace dawn_native {
descriptor.mipLevelCount = 1;
descriptor.usage = mAllowedUsage;
auto* texture = GetNextTextureImpl(&descriptor);
mLastNextTexture = texture;
return texture;
// Get the texture but remove the external refcount because it is never passed outside
// of dawn_native
mCurrentTexture = AcquireRef(GetNextTextureImpl(&descriptor));
mCurrentTextureView = mCurrentTexture->CreateView(nullptr);
return mCurrentTextureView.Get();
}
void SwapChainBase::Present(TextureBase* texture) {
if (GetDevice()->ConsumedError(ValidatePresent(texture))) {
void SwapChainBase::Present() {
if (GetDevice()->ConsumedError(ValidatePresent())) {
return;
}
ASSERT(!IsError());
if (GetDevice()->ConsumedError(OnBeforePresent(texture)))
if (GetDevice()->ConsumedError(OnBeforePresent(mCurrentTexture.Get()))) {
return;
}
mImplementation.Present(mImplementation.userData);
mCurrentTexture = nullptr;
mCurrentTextureView = nullptr;
}
const DawnSwapChainImplementation& SwapChainBase::GetImplementation() {
@@ -154,7 +170,7 @@ namespace dawn_native {
return {};
}
MaybeError SwapChainBase::ValidateGetNextTexture() const {
MaybeError SwapChainBase::ValidateGetCurrentTextureView() const {
DAWN_TRY(GetDevice()->ValidateObject(this));
if (mWidth == 0) {
@@ -165,14 +181,12 @@ namespace dawn_native {
return {};
}
MaybeError SwapChainBase::ValidatePresent(TextureBase* texture) const {
MaybeError SwapChainBase::ValidatePresent() const {
DAWN_TRY(GetDevice()->ValidateObject(this));
DAWN_TRY(GetDevice()->ValidateObject(texture));
// This also checks that the texture is valid since mLastNextTexture is always valid.
if (texture != mLastNextTexture) {
if (mCurrentTextureView.Get() == nullptr) {
return DAWN_VALIDATION_ERROR(
"Tried to present something other than the last NextTexture");
"Cannot call present without a GetCurrentTextureView call for this frame");
}
return {};

11
src/dawn_native/SwapChain.h
View File

@@ -39,8 +39,8 @@ namespace dawn_native {
wgpu::TextureUsage allowedUsage,
uint32_t width,
uint32_t height);
TextureBase* GetNextTexture();
void Present(TextureBase* texture);
TextureViewBase* GetCurrentTextureView();
void Present();
protected:
SwapChainBase(DeviceBase* device, ObjectBase::ErrorTag tag);
@@ -54,15 +54,16 @@ namespace dawn_native {
wgpu::TextureUsage allowedUsage,
uint32_t width,
uint32_t height) const;
MaybeError ValidateGetNextTexture() const;
MaybeError ValidatePresent(TextureBase* texture) const;
MaybeError ValidateGetCurrentTextureView() const;
MaybeError ValidatePresent() const;
DawnSwapChainImplementation mImplementation = {};
wgpu::TextureFormat mFormat = {};
wgpu::TextureUsage mAllowedUsage;
uint32_t mWidth = 0;
uint32_t mHeight = 0;
TextureBase* mLastNextTexture = nullptr;
Ref<TextureBase> mCurrentTexture;
Ref<TextureViewBase> mCurrentTextureView;
};
} // namespace dawn_native