draw_view_data.hh

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

 
#pragma once
 
#include "BLI_map.hh"
#include "BLI_math_vector_types.hh"
 
#include "DRW_render.hh"
#include "draw_context_private.hh"
 
#include "engines/compositor/compositor_engine.h"
#include "engines/eevee/eevee_engine.h"
#include "engines/external/external_engine.h"
#include "engines/gpencil/gpencil_engine.hh"
#include "engines/image/image_engine.h"
#include "engines/overlay/overlay_engine.h"
#include "engines/select/select_engine.hh"
#include "engines/workbench/workbench_engine.h"
 
#define GPU_INFO_SIZE 512 /* IMA_MAX_RENDER_TEXT_SIZE */
 
namespace blender::draw {
class TextureFromPool;
class Manager;
}  // namespace blender::draw
 
struct DRWTextStore;
struct GPUFrameBuffer;
struct GPUTexture;
struct GPUViewport;
struct ListBase;

struct DefaultFramebufferList {
  GPUFrameBuffer *default_fb;
  GPUFrameBuffer *overlay_fb;
  GPUFrameBuffer *in_front_fb;
  GPUFrameBuffer *color_only_fb;
  GPUFrameBuffer *depth_only_fb;
  GPUFrameBuffer *overlay_only_fb;
};
 
struct DefaultTextureList {
  GPUTexture *color;
  GPUTexture *color_overlay;
  GPUTexture *depth;
  GPUTexture *depth_in_front;
};
 
struct DRWViewData {
 public:
  DefaultFramebufferList dfbl = {};
  DefaultTextureList dtxl = {};
  bool from_viewport = false;
  blender::int2 texture_list_size = {0, 0};

  blender::eevee::Engine eevee;
  blender::workbench::Engine workbench;
  blender::draw::external::Engine external;
  blender::image_engine::Engine image;
  blender::draw::gpencil::Engine grease_pencil;
  blender::draw::overlay::Engine overlay;
  blender::draw::select::Engine object_select;
  blender::draw::edit_select::Engine edit_select;
#ifdef WITH_DRAW_DEBUG
  blender::draw::edit_select_debug::Engine edit_select_debug;
#endif
  blender::draw::compositor_engine::Engine compositor;

  blender::Map<std::string, std::unique_ptr<blender::draw::TextureFromPool>>
      viewport_compositor_passes;

  blender::draw::Manager *manager = nullptr;
 
 public:
  DRWViewData();
  ~DRWViewData();
 
  void texture_list_size_validate(const blender::int2 &size);
 
  template<typename CallbackT> void foreach_engine(CallbackT callback)
  {
    /* IMPORTANT: Order here defines the draw order. */
 
    /* Render engines. Output to the render result frame-buffer. Mutually exclusive. */
 
    callback(eevee);
    callback(workbench);
    callback(external);
    callback(image);
#ifdef WITH_DRAW_DEBUG
    callback(edit_select_debug);
#endif
    callback(grease_pencil);
    callback(compositor);
    callback(overlay);

    callback(object_select);
    callback(edit_select);
  }
 
  template<typename CallbackT> void foreach_enabled_engine(CallbackT callback)
  {
    foreach_engine([&](DrawEngine::Pointer &ptr) {
      if (ptr.instance == nullptr || ptr.instance->used == false) {
        return;
      }
      callback(*ptr.instance);
    });
  }
 
 private:
  void clear(bool free_instance_data);
};
 
void DRW_view_data_default_lists_from_viewport(DRWViewData *view_data, GPUViewport *viewport);
void DRW_view_data_reset(DRWViewData *view_data);
void DRW_view_data_free_unused(DRWViewData *view_data);