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9f90c8d3ca
BUG=dawn:22 Change-Id: I112d71323c9305fa0997d251556fe0a41dafed29 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12701 Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Austin Eng <enga@chromium.org>
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
// Copyright 2019 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/opengl/NativeSwapChainImplGL.h"
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#include "dawn_native/opengl/DeviceGL.h"
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namespace dawn_native { namespace opengl {
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NativeSwapChainImpl::NativeSwapChainImpl(Device* device,
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PresentCallback present,
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void* presentUserdata)
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: mPresentCallback(present), mPresentUserdata(presentUserdata), mDevice(device) {
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}
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NativeSwapChainImpl::~NativeSwapChainImpl() {
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const OpenGLFunctions& gl = mDevice->gl;
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gl.DeleteTextures(1, &mBackTexture);
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gl.DeleteFramebuffers(1, &mBackFBO);
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}
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void NativeSwapChainImpl::Init(DawnWSIContextGL* /*context*/) {
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const OpenGLFunctions& gl = mDevice->gl;
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gl.GenTextures(1, &mBackTexture);
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gl.BindTexture(GL_TEXTURE_2D, mBackTexture);
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gl.TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 0, 0, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
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gl.GenFramebuffers(1, &mBackFBO);
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gl.BindFramebuffer(GL_READ_FRAMEBUFFER, mBackFBO);
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gl.FramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
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mBackTexture, 0);
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}
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DawnSwapChainError NativeSwapChainImpl::Configure(WGPUTextureFormat format,
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WGPUTextureUsage usage,
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uint32_t width,
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uint32_t height) {
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if (format != WGPUTextureFormat_RGBA8Unorm) {
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return "unsupported format";
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}
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ASSERT(width > 0);
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ASSERT(height > 0);
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mWidth = width;
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mHeight = height;
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const OpenGLFunctions& gl = mDevice->gl;
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gl.BindTexture(GL_TEXTURE_2D, mBackTexture);
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// Reallocate the texture
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gl.TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
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nullptr);
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return DAWN_SWAP_CHAIN_NO_ERROR;
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}
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DawnSwapChainError NativeSwapChainImpl::GetNextTexture(DawnSwapChainNextTexture* nextTexture) {
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nextTexture->texture.u32 = mBackTexture;
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return DAWN_SWAP_CHAIN_NO_ERROR;
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}
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DawnSwapChainError NativeSwapChainImpl::Present() {
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const OpenGLFunctions& gl = mDevice->gl;
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gl.BindFramebuffer(GL_READ_FRAMEBUFFER, mBackFBO);
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gl.BindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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gl.BlitFramebuffer(0, 0, mWidth, mHeight, 0, mHeight, mWidth, 0, GL_COLOR_BUFFER_BIT,
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GL_NEAREST);
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mPresentCallback(mPresentUserdata);
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return DAWN_SWAP_CHAIN_NO_ERROR;
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}
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wgpu::TextureFormat NativeSwapChainImpl::GetPreferredFormat() const {
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return wgpu::TextureFormat::RGBA8Unorm;
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}
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}} // namespace dawn_native::opengl
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