117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
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// Copyright 2017 The NXT 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 "Utils.h"
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#include <unistd.h>
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nxt::Device device;
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nxt::Queue queue;
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nxt::Pipeline pipeline;
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nxt::Buffer buffer;
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nxt::BindGroup bindGroup;
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struct {uint32_t a; float b;} s;
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void init() {
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nxtProcTable procs;
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GetProcTableAndDevice(&procs, &device);
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nxtSetProcs(&procs);
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queue = device.CreateQueueBuilder().GetResult();
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nxt::ShaderModule vsModule = CreateShaderModule(device, nxt::ShaderStage::Vertex, R"(
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#version 450
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const vec2 pos[3] = vec2[3](vec2(0.0f, 0.5f), vec2(-0.5f, -0.5f), vec2(0.5f, -0.5f));
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void main() {
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gl_Position = vec4(pos[gl_VertexIndex], 0.5, 1.0);
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})"
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);
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nxt::ShaderModule fsModule = CreateShaderModule(device, nxt::ShaderStage::Fragment, R"(
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#version 450
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layout(set = 0, binding = 0) uniform myBlock {
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int a;
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float b;
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} myUbo;
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out vec4 fragColor;
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void main() {
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fragColor = vec4(1.0, myUbo.a / 255.0, myUbo.b, 1.0);
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})"
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);
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nxt::BindGroupLayout bgl = device.CreateBindGroupLayoutBuilder()
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.SetBindingsType(nxt::ShaderStageBit::Fragment, nxt::BindingType::UniformBuffer, 0, 1)
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.GetResult();
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nxt::PipelineLayout pl = device.CreatePipelineLayoutBuilder()
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.SetBindGroupLayout(0, bgl)
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.GetResult();
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pipeline = device.CreatePipelineBuilder()
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.SetLayout(pl)
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.SetStage(nxt::ShaderStage::Vertex, vsModule, "main")
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.SetStage(nxt::ShaderStage::Fragment, fsModule, "main")
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.GetResult();
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buffer = device.CreateBufferBuilder()
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.SetAllowedUsage(nxt::BufferUsageBit::Mapped | nxt::BufferUsageBit::Uniform)
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.SetInitialUsage(nxt::BufferUsageBit::Mapped)
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.SetSize(sizeof(s))
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.GetResult();
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nxt::BufferView view = buffer.CreateBufferViewBuilder()
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.SetExtent(0, sizeof(s))
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.GetResult();
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bindGroup = device.CreateBindGroupBuilder()
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.SetLayout(bgl)
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.SetUsage(nxt::BindGroupUsage::Frozen)
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.SetBufferViews(0, 1, &view)
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.GetResult();
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}
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void frame() {
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s.a = (s.a + 1) % 256;
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s.b += 0.02;
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if (s.b >= 1.0f) {s.b = 0.0f;}
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buffer.TransitionUsage(nxt::BufferUsageBit::Mapped);
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buffer.SetSubData(0, sizeof(s) / sizeof(uint32_t), reinterpret_cast<uint32_t*>(&s));
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nxt::CommandBuffer commands = device.CreateCommandBufferBuilder()
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.SetPipeline(pipeline)
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.TransitionBufferUsage(buffer, nxt::BufferUsageBit::Uniform)
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.SetBindGroup(0, bindGroup)
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.DrawArrays(3, 1, 0, 0)
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.GetResult();
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queue.Submit(1, &commands);
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SwapBuffers();
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}
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int main(int argc, const char* argv[]) {
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if (!InitUtils(argc, argv)) {
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return 1;
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}
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init();
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while (!ShouldQuit()) {
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frame();
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usleep(16000);
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}
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// TODO release stuff
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}
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