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// This file is part of the 64k demo project.
// It implements the GaussianBlurEffect with parameterization.
#include "gpu/demo_effects.h"
#include "gpu/effects/post_process_helper.h"
#include "gpu/gpu.h"
// --- GaussianBlurEffect ---
// Backward compatibility constructor (delegates to parameterized constructor)
GaussianBlurEffect::GaussianBlurEffect(const GpuContext& ctx)
: GaussianBlurEffect(ctx, GaussianBlurParams{}) {
}
// Parameterized constructor
GaussianBlurEffect::GaussianBlurEffect(const GpuContext& ctx,
const GaussianBlurParams& params)
: PostProcessEffect(ctx), params_(params) {
pipeline_ = create_post_process_pipeline(ctx_.device, ctx_.format,
gaussian_blur_shader_wgsl);
uniforms_.init(ctx_.device);
}
void GaussianBlurEffect::render(WGPURenderPassEncoder pass, float time,
float beat, float intensity,
float aspect_ratio) {
// Update uniforms with current state and parameters
const GaussianBlurUniforms u = {.time = time,
.beat = beat,
.intensity = intensity,
.aspect_ratio = aspect_ratio,
.width = (float)width_,
.height = (float)height_,
.strength = params_.strength,
._pad = 0.0f};
uniforms_.update(ctx_.queue, u);
wgpuRenderPassEncoderSetPipeline(pass, pipeline_);
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);
}
void GaussianBlurEffect::update_bind_group(WGPUTextureView input_view) {
pp_update_bind_group(ctx_.device, pipeline_, &bind_group_, input_view,
uniforms_.get());
}
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