Brecht Van Lommel
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
61 lines
1.6 KiB
C++
61 lines
1.6 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) 2007 Blender Foundation.
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* All rights reserved.
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*
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*
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* Contributor(s): Blender Foundation
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/windowmanager/wm_draw.h
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* \ingroup wm
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*/
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#ifndef __WM_DRAW_H__
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#define __WM_DRAW_H__
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#include "GPU_glew.h"
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struct GPUOffScreen;
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struct GPUViewport;
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struct GPUTexture;
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typedef struct wmDrawBuffer {
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struct GPUOffScreen *offscreen[2];
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struct GPUViewport *viewport[2];
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bool stereo;
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int bound_view;
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} wmDrawBuffer;
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struct bContext;
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struct wmWindow;
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struct ARegion;
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/* wm_draw.c */
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void wm_draw_update(struct bContext *C);
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void wm_draw_region_clear(struct wmWindow *win, struct ARegion *ar);
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void wm_draw_region_blend(struct ARegion *ar, int view, bool blend);
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struct GPUTexture *wm_draw_region_texture(struct ARegion *ar, int view);
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#endif /* __WM_DRAW_H__ */
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