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// This file is part of the 64k demo project.
// It implements the GaussianBlurEffect.
#include "gpu/demo_effects.h"
#include "gpu/gpu.h"
// --- GaussianBlurEffect ---
GaussianBlurEffect::GaussianBlurEffect(const GpuContext& ctx)
: PostProcessEffect(ctx) {
uniforms_ =
gpu_create_buffer(ctx_.device, sizeof(float) * 6,
WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
pipeline_ =
create_post_process_pipeline(ctx_.device, ctx_.format, gaussian_blur_shader_wgsl);
}
void GaussianBlurEffect::render(WGPURenderPassEncoder pass, float t, float b,
float i, float a) {
struct {
float t, b, i, a, w, h;
} u = {t, b, i, a, (float)width_, (float)height_};
wgpuQueueWriteBuffer(ctx_.queue, uniforms_.buffer, 0, &u, sizeof(u));
PostProcessEffect::render(pass, t, b, i, a);
}
void GaussianBlurEffect::update_bind_group(WGPUTextureView v) {
pp_update_bind_group(ctx_.device, pipeline_, &bind_group_, v, uniforms_);
}
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