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#include "renderer.h"
#include "waterfall.h"
#include <fstream>
#include <sstream>
#include <iostream>
Renderer::Renderer(wgpu::Device device, wgpu::Surface surface, int width, int height)
: device_(device), surface_(surface), width_(width), height_(height), time_(0.0f),
surfaceFormat_(wgpu::TextureFormat::BGRA8Unorm) {}
Renderer::~Renderer() = default;
bool Renderer::initialize() {
configureSurface();
createPipelines();
// Create two waterfall views side-by-side
waterfalls_.push_back(std::make_unique<Waterfall>(
device_, 0.0f, 0.1f, 0.5f, 0.9f, "Frequency vs Time"));
waterfalls_.push_back(std::make_unique<Waterfall>(
device_, 0.5f, 0.1f, 0.5f, 0.9f, "Position vs Time"));
for (auto& waterfall : waterfalls_) {
if (!waterfall->initialize()) {
return false;
}
}
return true;
}
void Renderer::configureSurface() {
wgpu::SurfaceConfiguration config{};
config.device = device_;
config.format = surfaceFormat_;
config.usage = wgpu::TextureUsage::RenderAttachment;
config.width = width_;
config.height = height_;
config.presentMode = wgpu::PresentMode::Fifo;
config.alphaMode = wgpu::CompositeAlphaMode::Auto;
surface_.configure(config);
}
void Renderer::createPipelines() {
// Load shader
std::ifstream shaderFile("shaders/waterfall.wgsl");
std::stringstream buffer;
buffer << shaderFile.rdbuf();
std::string shaderCode = buffer.str();
wgpu::ShaderSourceWGSL wgslSource{};
wgslSource.chain.sType = wgpu::SType::ShaderSourceWGSL;
wgslSource.code.data = shaderCode.c_str();
wgslSource.code.length = shaderCode.length();
wgpu::ShaderModuleDescriptor shaderDesc{};
shaderDesc.nextInChain = &wgslSource.chain;
wgpu::ShaderModule shader = device_.createShaderModule(shaderDesc);
// Vertex buffer layout
wgpu::VertexAttribute attributes[2];
attributes[0].format = wgpu::VertexFormat::Float32x2;
attributes[0].offset = 0;
attributes[0].shaderLocation = 0;
attributes[1].format = wgpu::VertexFormat::Float32x3;
attributes[1].offset = 2 * sizeof(float);
attributes[1].shaderLocation = 1;
wgpu::VertexBufferLayout vertexBufferLayout{};
vertexBufferLayout.arrayStride = 5 * sizeof(float);
vertexBufferLayout.stepMode = wgpu::VertexStepMode::Vertex;
vertexBufferLayout.attributeCount = 2;
vertexBufferLayout.attributes = attributes;
// Pipeline layout
wgpu::PipelineLayoutDescriptor layoutDesc{};
wgpu::PipelineLayout pipelineLayout = device_.createPipelineLayout(layoutDesc);
// Color target
wgpu::BlendState blend{};
blend.color.operation = wgpu::BlendOperation::Add;
blend.color.srcFactor = wgpu::BlendFactor::One;
blend.color.dstFactor = wgpu::BlendFactor::Zero;
blend.alpha.operation = wgpu::BlendOperation::Add;
blend.alpha.srcFactor = wgpu::BlendFactor::One;
blend.alpha.dstFactor = wgpu::BlendFactor::Zero;
wgpu::ColorTargetState colorTarget{};
colorTarget.format = surfaceFormat_;
colorTarget.blend = &blend;
colorTarget.writeMask = wgpu::ColorWriteMask::All;
wgpu::FragmentState fragmentState{};
fragmentState.module = shader;
fragmentState.entryPoint.data = "fs_main";
fragmentState.entryPoint.length = 7;
fragmentState.targetCount = 1;
fragmentState.targets = &colorTarget;
// Line strip pipeline
wgpu::RenderPipelineDescriptor pipelineDesc{};
pipelineDesc.layout = pipelineLayout;
pipelineDesc.vertex.module = shader;
pipelineDesc.vertex.entryPoint.data = "vs_main";
pipelineDesc.vertex.entryPoint.length = 7;
pipelineDesc.vertex.bufferCount = 1;
pipelineDesc.vertex.buffers = &vertexBufferLayout;
pipelineDesc.primitive.topology = wgpu::PrimitiveTopology::LineStrip;
pipelineDesc.fragment = &fragmentState;
pipelineDesc.multisample.count = 1;
pipelineDesc.multisample.mask = ~0u;
linePipeline_ = device_.createRenderPipeline(pipelineDesc);
// Line list pipeline for grid
pipelineDesc.primitive.topology = wgpu::PrimitiveTopology::LineList;
lineListPipeline_ = device_.createRenderPipeline(pipelineDesc);
}
void Renderer::update() {
time_ += 0.016f; // ~60fps
for (auto& waterfall : waterfalls_) {
waterfall->update(time_);
}
}
void Renderer::render() {
wgpu::SurfaceTexture surfaceTexture;
surface_.getCurrentTexture(&surfaceTexture);
if (surfaceTexture.status != wgpu::SurfaceGetCurrentTextureStatus::SuccessOptimal &&
surfaceTexture.status != wgpu::SurfaceGetCurrentTextureStatus::SuccessSuboptimal) {
std::cerr << "Failed to get surface texture" << std::endl;
return;
}
wgpu::Texture texture(surfaceTexture.texture);
wgpu::TextureView textureView = texture.createView();
wgpu::CommandEncoder encoder = device_.createCommandEncoder();
wgpu::RenderPassColorAttachment colorAttachment{};
colorAttachment.view = textureView;
colorAttachment.loadOp = wgpu::LoadOp::Clear;
colorAttachment.storeOp = wgpu::StoreOp::Store;
colorAttachment.clearValue = {0.1, 0.1, 0.15, 1.0};
wgpu::RenderPassDescriptor renderPassDesc{};
renderPassDesc.colorAttachmentCount = 1;
renderPassDesc.colorAttachments = &colorAttachment;
wgpu::RenderPassEncoder pass = encoder.beginRenderPass(renderPassDesc);
for (auto& waterfall : waterfalls_) {
waterfall->render(pass, linePipeline_, lineListPipeline_, width_, height_);
}
pass.end();
wgpu::CommandBuffer commands = encoder.finish();
device_.getQueue().submit(1, &commands);
surface_.present();
}
void Renderer::resize(int width, int height) {
if (width > 0 && height > 0) {
width_ = width;
height_ = height;
configureSurface();
}
}
void Renderer::toggleGrid() {
for (auto& waterfall : waterfalls_) {
waterfall->toggleGrid();
}
}
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