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// Copyright 2017 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "dawn/samples/SampleUtils.h"
#include "dawn/utils/SystemUtils.h"
#include "dawn/utils/WGPUHelpers.h"
WGPUDevice device;
WGPUQueue queue;
WGPUSwapChain swapchain;
WGPURenderPipeline pipeline;
WGPUTextureFormat swapChainFormat;
void init() {
device = CreateCppDawnDevice().MoveToCHandle();
queue = wgpuDeviceGetQueue(device);
swapchain = GetSwapChain().MoveToCHandle();
swapChainFormat = static_cast<WGPUTextureFormat>(GetPreferredSwapChainTextureFormat());
const char* vs = R"(
@vertex fn main(
@builtin(vertex_index) VertexIndex : u32
) -> @builtin(position) vec4f {
var pos = array(
vec2f( 0.0, 0.5),
vec2f(-0.5, -0.5),
vec2f( 0.5, -0.5)
);
return vec4f(pos[VertexIndex], 0.0, 1.0);
})";
WGPUShaderModule vsModule = dawn::utils::CreateShaderModule(device, vs).MoveToCHandle();
const char* fs = R"(
@fragment fn main() -> @location(0) vec4f {
return vec4f(1.0, 0.0, 0.0, 1.0);
})";
WGPUShaderModule fsModule = dawn::utils::CreateShaderModule(device, fs).MoveToCHandle();
{
WGPURenderPipelineDescriptor descriptor = {};
// Fragment state
WGPUBlendState blend = {};
blend.color.operation = WGPUBlendOperation_Add;
blend.color.srcFactor = WGPUBlendFactor_One;
blend.color.dstFactor = WGPUBlendFactor_One;
blend.alpha.operation = WGPUBlendOperation_Add;
blend.alpha.srcFactor = WGPUBlendFactor_One;
blend.alpha.dstFactor = WGPUBlendFactor_One;
WGPUColorTargetState colorTarget = {};
colorTarget.format = swapChainFormat;
colorTarget.blend = &blend;
colorTarget.writeMask = WGPUColorWriteMask_All;
WGPUFragmentState fragment = {};
fragment.module = fsModule;
fragment.entryPoint = "main";
fragment.targetCount = 1;
fragment.targets = &colorTarget;
descriptor.fragment = &fragment;
// Other state
descriptor.layout = nullptr;
descriptor.depthStencil = nullptr;
descriptor.vertex.module = vsModule;
descriptor.vertex.entryPoint = "main";
descriptor.vertex.bufferCount = 0;
descriptor.vertex.buffers = nullptr;
descriptor.multisample.count = 1;
descriptor.multisample.mask = 0xFFFFFFFF;
descriptor.multisample.alphaToCoverageEnabled = false;
descriptor.primitive.frontFace = WGPUFrontFace_CCW;
descriptor.primitive.cullMode = WGPUCullMode_None;
descriptor.primitive.topology = WGPUPrimitiveTopology_TriangleList;
descriptor.primitive.stripIndexFormat = WGPUIndexFormat_Undefined;
pipeline = wgpuDeviceCreateRenderPipeline(device, &descriptor);
}
wgpuShaderModuleRelease(vsModule);
wgpuShaderModuleRelease(fsModule);
}
void frame() {
WGPUTextureView backbufferView = wgpuSwapChainGetCurrentTextureView(swapchain);
WGPURenderPassDescriptor renderpassInfo = {};
WGPURenderPassColorAttachment colorAttachment = {};
{
colorAttachment.view = backbufferView;
// The depthSlice must be initialized with the 'undefined' value for 2d color attachments.
colorAttachment.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
colorAttachment.resolveTarget = nullptr;
colorAttachment.clearValue = {0.0f, 0.0f, 0.0f, 0.0f};
colorAttachment.loadOp = WGPULoadOp_Clear;
colorAttachment.storeOp = WGPUStoreOp_Store;
renderpassInfo.colorAttachmentCount = 1;
renderpassInfo.colorAttachments = &colorAttachment;
renderpassInfo.depthStencilAttachment = nullptr;
}
WGPUCommandBuffer commands;
{
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(device, nullptr);
WGPURenderPassEncoder pass = wgpuCommandEncoderBeginRenderPass(encoder, &renderpassInfo);
wgpuRenderPassEncoderSetPipeline(pass, pipeline);
wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);
wgpuRenderPassEncoderEnd(pass);
wgpuRenderPassEncoderRelease(pass);
commands = wgpuCommandEncoderFinish(encoder, nullptr);
wgpuCommandEncoderRelease(encoder);
}
wgpuQueueSubmit(queue, 1, &commands);
wgpuCommandBufferRelease(commands);
wgpuSwapChainPresent(swapchain);
wgpuTextureViewRelease(backbufferView);
DoFlush();
}
int main(int argc, const char* argv[]) {
if (!InitSample(argc, argv)) {
return 1;
}
init();
while (!ShouldQuit()) {
ProcessEvents();
frame();
dawn::utils::USleep(16000);
}
}