image_shader_params.hh

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/* SPDX-FileCopyrightText: 2021 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include "DNA_camera_types.h"
#include "DNA_image_types.h"
#include "DNA_scene_types.h"
 
#include "BLI_math_vector.h"
 
#include "IMB_imbuf_types.hh"
 
#include "BKE_image.hh"
 
#include "DRW_render.hh"
 
#include "image_enums.hh"
#include "image_space.hh"
 
namespace blender::image_engine {
 
struct ShaderParameters {
  ImageDrawFlags flags = ImageDrawFlags::DEFAULT;
  float4 shuffle;
  float2 far_near;
  bool use_premul_alpha = false;
 
  void update(AbstractSpaceAccessor *space,
              const Scene *scene,
              ::Image *image,
              ImBuf *image_buffer)
  {
    flags = ImageDrawFlags::DEFAULT;
    shuffle = float4(1.0f);
    far_near = float2(100.0f, 0.0f);
 
    use_premul_alpha = BKE_image_has_gpu_texture_premultiplied_alpha(image, image_buffer);
 
    if (scene->camera && scene->camera->type == OB_CAMERA) {
      const Camera &camera = DRW_object_get_data_for_drawing<const Camera>(*scene->camera);
      far_near = float2(camera.clip_end, camera.clip_start);
    }
    space->get_shader_parameters(*this, image_buffer);
  }
};
 
}  // namespace blender::image_engine