diff options
Diffstat (limited to 'source/blender/draw/engines/compositor/compositor_engine.cc')
| -rw-r--r-- | source/blender/draw/engines/compositor/compositor_engine.cc | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/source/blender/draw/engines/compositor/compositor_engine.cc b/source/blender/draw/engines/compositor/compositor_engine.cc new file mode 100644 index 00000000000..f36a59a4ce6 --- /dev/null +++ b/source/blender/draw/engines/compositor/compositor_engine.cc @@ -0,0 +1,203 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include "BLI_listbase.h" +#include "BLI_math_vec_types.hh" +#include "BLI_string_ref.hh" +#include "BLI_utildefines.h" + +#include "BLT_translation.h" + +#include "DNA_ID_enums.h" +#include "DNA_scene_types.h" + +#include "DEG_depsgraph_query.h" + +#include "DRW_render.h" + +#include "IMB_colormanagement.h" + +#include "COM_context.hh" +#include "COM_evaluator.hh" +#include "COM_texture_pool.hh" + +#include "GPU_texture.h" + +namespace blender::draw::compositor { + +class TexturePool : public realtime_compositor::TexturePool { + public: + GPUTexture *allocate_texture(int2 size, eGPUTextureFormat format) override + { + DrawEngineType *owner = (DrawEngineType *)this; + return DRW_texture_pool_query_2d(size.x, size.y, format, owner); + } +}; + +class Context : public realtime_compositor::Context { + private: + /* A pointer to the info message of the compositor engine. This is a char array of size + * GPU_INFO_SIZE. The message is cleared prior to updating or evaluating the compositor. */ + char *info_message_; + + public: + Context(realtime_compositor::TexturePool &texture_pool, char *info_message) + : realtime_compositor::Context(texture_pool), info_message_(info_message) + { + } + + const Scene *get_scene() const override + { + return DRW_context_state_get()->scene; + } + + int2 get_output_size() override + { + return int2(float2(DRW_viewport_size_get())); + } + + GPUTexture *get_output_texture() override + { + return DRW_viewport_texture_list_get()->color; + } + + GPUTexture *get_input_texture(int UNUSED(view_layer), eScenePassType UNUSED(pass_type)) override + { + return get_output_texture(); + } + + StringRef get_view_name() override + { + const SceneRenderView *view = static_cast<SceneRenderView *>( + BLI_findlink(&get_scene()->r.views, DRW_context_state_get()->v3d->multiview_eye)); + return view->name; + } + + void set_info_message(StringRef message) const override + { + message.copy(info_message_, GPU_INFO_SIZE); + } +}; + +class Engine { + private: + TexturePool texture_pool_; + Context context_; + realtime_compositor::Evaluator evaluator_; + /* Stores the viewport size at the time the last compositor evaluation happened. See the + * update_viewport_size method for more information. */ + int2 last_viewport_size_; + + public: + Engine(char *info_message) + : context_(texture_pool_, info_message), + evaluator_(context_, node_tree()), + last_viewport_size_(context_.get_output_size()) + { + } + + /* Update the viewport size and evaluate the compositor. */ + void draw() + { + update_viewport_size(); + evaluator_.evaluate(); + } + + /* If the size of the viewport changed from the last time the compositor was evaluated, update + * the viewport size and reset the evaluator. That's because the evaluator compiles the node tree + * in a manner that is specifically optimized for the size of the viewport. This should be called + * before evaluating the compositor. */ + void update_viewport_size() + { + if (last_viewport_size_ == context_.get_output_size()) { + return; + } + + last_viewport_size_ = context_.get_output_size(); + + evaluator_.reset(); + } + + /* If the compositor node tree changed, reset the evaluator. */ + void update(const Depsgraph *depsgraph) + { + if (DEG_id_type_updated(depsgraph, ID_NT)) { + evaluator_.reset(); + } + } + + /* Get a reference to the compositor node tree. */ + static bNodeTree &node_tree() + { + return *DRW_context_state_get()->scene->nodetree; + } +}; + +} // namespace blender::draw::compositor + +using namespace blender::draw::compositor; + +struct COMPOSITOR_Data { + DrawEngineType *engine_type; + DRWViewportEmptyList *fbl; + DRWViewportEmptyList *txl; + DRWViewportEmptyList *psl; + DRWViewportEmptyList *stl; + Engine *instance_data; + char info[GPU_INFO_SIZE]; +}; + +static void compositor_engine_init(void *data) +{ + COMPOSITOR_Data *compositor_data = static_cast<COMPOSITOR_Data *>(data); + + if (!compositor_data->instance_data) { + compositor_data->instance_data = new Engine(compositor_data->info); + } +} + +static void compositor_engine_free(void *instance_data) +{ + Engine *engine = static_cast<Engine *>(instance_data); + delete engine; +} + +static void compositor_engine_draw(void *data) +{ + const COMPOSITOR_Data *compositor_data = static_cast<COMPOSITOR_Data *>(data); + compositor_data->instance_data->draw(); +} + +static void compositor_engine_update(void *data) +{ + COMPOSITOR_Data *compositor_data = static_cast<COMPOSITOR_Data *>(data); + + /* Clear any info message that was set in a previous update. */ + compositor_data->info[0] = '\0'; + + if (compositor_data->instance_data) { + compositor_data->instance_data->update(DRW_context_state_get()->depsgraph); + } +} + +extern "C" { + +static const DrawEngineDataSize compositor_data_size = DRW_VIEWPORT_DATA_SIZE(COMPOSITOR_Data); + +DrawEngineType draw_engine_compositor_type = { + nullptr, /* next */ + nullptr, /* prev */ + N_("Compositor"), /* idname */ + &compositor_data_size, /* vedata_size */ + &compositor_engine_init, /* engine_init */ + nullptr, /* engine_free */ + &compositor_engine_free, /* instance_free */ + nullptr, /* cache_init */ + nullptr, /* cache_populate */ + nullptr, /* cache_finish */ + &compositor_engine_draw, /* draw_scene */ + &compositor_engine_update, /* view_update */ + nullptr, /* id_update */ + nullptr, /* render_to_image */ + nullptr, /* store_metadata */ +}; +} |