// This file is part of the 64k demo project.
// It implements the DistortEffect.

#include "gpu/demo_effects.h"
#include "gpu/gpu.h"

// --- DistortEffect ---
DistortEffect::DistortEffect(WGPUDevice device, WGPUQueue queue,
                             WGPUTextureFormat format)
    : PostProcessEffect(device, queue) {
  uniforms_ =
      gpu_create_buffer(device_, sizeof(float) * 4,
                        WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
  pipeline_ =
      create_post_process_pipeline(device_, format, distort_shader_wgsl);
}
void DistortEffect::render(WGPURenderPassEncoder pass, float t, float b,
                           float i, float a) {
  struct {
    float t, b, i, a;
  } u = {t, b, i, a};
  wgpuQueueWriteBuffer(queue_, uniforms_.buffer, 0, &u, sizeof(u));
  PostProcessEffect::render(pass, t, b, i, a);
}
void DistortEffect::update_bind_group(WGPUTextureView v) {
  pp_update_bind_group(device_, pipeline_, &bind_group_, v, uniforms_);
}