e01cadd657
For Blender 2.8 we had to be compatible with very old OpenGL versions, and triple buffer was designed to work without offscreen rendering, by copying the the backbuffer to a texture right before swapping. This way we could avoid redrawing unchanged regions by copying them from this texture on the next redraws. Triple buffer used to suffer from poor performance and driver bugs on specific cards, so alternative draw methods remained available. Now that we require newer OpenGL, we can have just a single draw method that draw each region into an offscreen buffer, and then draws those to the screen. This has some advantages: * Poor 3D view performance when using Region Overlap should be solved now, since we can also cache overlapping regions in offscreen buffers. * Page flip, anaglyph and interlace stereo drawing can be a little faster by avoiding a copy to an intermediate texture. * The new 3D view drawing already writes to an offscreen buffer, which we can draw from directly instead of duplicating it to another buffer. * Eventually we will be able to remove depth and stencil buffers from the window and save memory, though at the moment there are still some tools using it so it's not possible yet. * This also fixes a bug with Eevee sampling not progressing with stereo drawing in the 3D viewport. Differential Revision: https://developer.blender.org/D3061
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2005 Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s):
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file GPU_viewport.h
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* \ingroup gpu
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*/
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#ifndef __GPU_VIEWPORT_H__
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#define __GPU_VIEWPORT_H__
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#include <stdbool.h>
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#include "DNA_vec_types.h"
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#include "GPU_framebuffer.h"
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#include "GPU_texture.h"
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#define GPU_INFO_SIZE 512 /* IMA_MAX_RENDER_TEXT */
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typedef struct GPUViewport GPUViewport;
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/* Contains memory pools informations */
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typedef struct ViewportMemoryPool {
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struct BLI_mempool *calls;
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struct BLI_mempool *states;
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struct BLI_mempool *shgroups;
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struct BLI_mempool *uniforms;
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struct BLI_mempool *passes;
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} ViewportMemoryPool;
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/* All FramebufferLists are just the same pointers with different names */
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typedef struct FramebufferList {
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struct GPUFrameBuffer *framebuffers[0];
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} FramebufferList;
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typedef struct TextureList {
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struct GPUTexture *textures[0];
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} TextureList;
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typedef struct PassList {
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struct DRWPass *passes[0];
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} PassList;
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typedef struct StorageList {
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void *storage[0]; /* custom structs from the engine */
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} StorageList;
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typedef struct ViewportEngineData {
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void *engine_type;
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FramebufferList *fbl;
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TextureList *txl;
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PassList *psl;
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StorageList *stl;
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char info[GPU_INFO_SIZE];
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/* we may want to put this elsewhere */
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struct DRWTextStore *text_draw_cache;
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/* Profiling data */
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double init_time;
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double render_time;
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double background_time;
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} ViewportEngineData;
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typedef struct ViewportEngineData_Info {
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int fbl_len;
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int txl_len;
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int psl_len;
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int stl_len;
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} ViewportEngineData_Info;
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GPUViewport *GPU_viewport_create(void);
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void GPU_viewport_bind(GPUViewport *viewport, const rcti *rect);
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void GPU_viewport_unbind(GPUViewport *viewport);
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void GPU_viewport_draw_to_screen(GPUViewport *viewport, const rcti *rect);
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void GPU_viewport_free(GPUViewport *viewport);
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GPUViewport *GPU_viewport_create_from_offscreen(struct GPUOffScreen *ofs);
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void GPU_viewport_clear_from_offscreen(GPUViewport *viewport);
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ViewportMemoryPool *GPU_viewport_mempool_get(GPUViewport *viewport);
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struct DRWInstanceDataList *GPU_viewport_instance_data_list_get(GPUViewport *viewport);
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void *GPU_viewport_engine_data_create(GPUViewport *viewport, void *engine_type);
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void *GPU_viewport_engine_data_get(GPUViewport *viewport, void *engine_type);
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void *GPU_viewport_framebuffer_list_get(GPUViewport *viewport);
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void *GPU_viewport_texture_list_get(GPUViewport *viewport);
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void GPU_viewport_size_get(const GPUViewport *viewport, int size[2]);
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void GPU_viewport_size_set(GPUViewport *viewport, const int size[2]);
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/* Profiling */
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double *GPU_viewport_cache_time_get(GPUViewport *viewport);
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void GPU_viewport_tag_update(GPUViewport *viewport);
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bool GPU_viewport_do_update(GPUViewport *viewport);
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GPUTexture *GPU_viewport_color_texture(GPUViewport *viewport);
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/* Texture pool */
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GPUTexture *GPU_viewport_texture_pool_query(GPUViewport *viewport, void *engine, int width, int height, int channels, int format);
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bool GPU_viewport_engines_data_validate(GPUViewport *viewport, unsigned int hash);
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void GPU_viewport_cache_release(GPUViewport *viewport);
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#endif // __GPU_VIEWPORT_H__
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