125 lines
3.8 KiB
C++
125 lines
3.8 KiB
C++
// 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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#include <vector>
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nxt::Device device;
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nxt::Buffer vertexBuffer;
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nxt::Buffer instanceBuffer;
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nxt::Queue queue;
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nxt::Pipeline pipeline;
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void initBuffers() {
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static const float vertexData[12] = {
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0.0f, 0.1f, 0.0f, 1.0f,
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-0.1f, -0.1f, 0.0f, 1.0f,
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0.1f, -0.1f, 0.0f, 1.0f,
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};
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vertexBuffer = device.CreateBufferBuilder()
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.SetAllowedUsage(nxt::BufferUsageBit::Mapped | nxt::BufferUsageBit::Vertex)
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.SetInitialUsage(nxt::BufferUsageBit::Mapped)
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.SetSize(sizeof(vertexData))
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.GetResult();
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vertexBuffer.SetSubData(0, sizeof(vertexData) / sizeof(uint32_t),
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reinterpret_cast<const uint32_t*>(vertexData));
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vertexBuffer.FreezeUsage(nxt::BufferUsageBit::Vertex);
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static const float instanceData[8] = {
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-0.5f, -0.5f,
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-0.5f, 0.5f,
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0.5f, -0.5f,
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0.5f, 0.5f,
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};
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instanceBuffer = device.CreateBufferBuilder()
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.SetAllowedUsage(nxt::BufferUsageBit::Mapped | nxt::BufferUsageBit::Vertex)
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.SetInitialUsage(nxt::BufferUsageBit::Mapped)
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.SetSize(sizeof(instanceData))
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.GetResult();
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instanceBuffer.SetSubData(0, sizeof(instanceData) / sizeof(uint32_t),
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reinterpret_cast<const uint32_t*>(instanceData));
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instanceBuffer.FreezeUsage(nxt::BufferUsageBit::Vertex);
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}
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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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initBuffers();
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nxt::ShaderModule vsModule = CreateShaderModule(device, nxt::ShaderStage::Vertex, R"(
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#version 450
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layout(location = 0) in vec4 pos;
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layout(location = 1) in vec2 instance;
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void main() {
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gl_Position = vec4(pos.xy + instance, pos.zw);
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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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out vec4 fragColor;
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void main() {
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fragColor = vec4(1.0, 0.0, 0.0, 1.0);
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})"
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);
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auto inputState = device.CreateInputStateBuilder()
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.SetAttribute(0, 0, nxt::VertexFormat::FloatR32G32B32A32, 0)
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.SetInput(0, 4 * sizeof(float), nxt::InputStepMode::Vertex)
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.SetAttribute(1, 1, nxt::VertexFormat::FloatR32G32, 0)
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.SetInput(1, 2 * sizeof(float), nxt::InputStepMode::Instance)
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.GetResult();
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pipeline = device.CreatePipelineBuilder()
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.SetStage(nxt::ShaderStage::Vertex, vsModule, "main")
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.SetStage(nxt::ShaderStage::Fragment, fsModule, "main")
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.SetInputState(inputState)
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.GetResult();
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}
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void frame() {
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static const uint32_t vertexBufferOffsets[1] = {0};
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nxt::CommandBuffer commands = device.CreateCommandBufferBuilder()
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.SetPipeline(pipeline)
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.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets)
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.SetVertexBuffers(1, 1, &instanceBuffer, vertexBufferOffsets)
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.DrawArrays(3, 4, 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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