blob: ada2d8b78b0b154ffc12ba51752254096afafd3a [file] [log] [blame]
// Copyright 2023 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_DAWN_NATIVE_BLITBUFFERTODEPTHSTENCIL_H_
#define SRC_DAWN_NATIVE_BLITBUFFERTODEPTHSTENCIL_H_
#include "dawn/native/Error.h"
namespace dawn::native {
struct TextureCopy;
// BlitBufferToDepth works around issues where copying from a buffer
// to depth does not work on some drivers.
// Currently, only depth16unorm textures can be CopyDst, so only depth16unorm
// is supported.
// It does the following:
// - Copies buffer data to an rg8uint texture.
// - Sets the viewport to the copy rect.
// - Uploads the copy origin to a uniform buffer.
// - For each destination layer:
// - Performs a draw to sample the rg8uint data, computes the
// floating point depth value, and writes the frag depth.
MaybeError BlitStagingBufferToDepth(DeviceBase* device,
BufferBase* buffer,
const TextureDataLayout& src,
const TextureCopy& dst,
const Extent3D& copyExtent);
MaybeError BlitBufferToDepth(DeviceBase* device,
CommandEncoder* commandEncoder,
BufferBase* buffer,
const TextureDataLayout& src,
const TextureCopy& dst,
const Extent3D& copyExtent);
// BlitBufferToStencil works around issues where copying from a buffer
// to stencil does not work on some drivers.
// It does the following:
// - Copies buffer data to an r8uint texture.
// - Sets the viewport to the copy rect.
// - Uploads the copy origin to a uniform buffer.
// - For each destination layer:
// - Performs a draw to clear stencil to 0.
// - Performs 8 draws for each bit of stencil to set the respective
// stencil bit to 1, if the source r8 texture also has that bit set.
// If the source r8 texture does not, the fragment is discarded.
MaybeError BlitStagingBufferToStencil(DeviceBase* device,
BufferBase* buffer,
const TextureDataLayout& src,
const TextureCopy& dst,
const Extent3D& copyExtent);
MaybeError BlitBufferToStencil(DeviceBase* device,
CommandEncoder* commandEncoder,
BufferBase* buffer,
const TextureDataLayout& src,
const TextureCopy& dst,
const Extent3D& copyExtent);
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_BLITBUFFERTODEPTHSTENCIL_H_