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blender-archive/source/blender/editors/include/ED_clip.h
Sergey Sharybin 2dff7c01ad Implement GPU-side display transform for clip editor
Implemented using GLSL API from OpenColorIO library and
some general functions were added to it's c-api:

- OCIO_setupGLSLDraw prepares OpenGL context for GPU-based
  transformation for a giver processor.

  This function compiles and links shader, sets  up it's
  argument. After this transformation would be applied
  on an image displaying as a 2D texture.

  So, glaDrawPixelsTex called after OCIO_setupGLSLDraw will
  do a proper color space transform.

- OCIO_finishGLSLDraw restores OpenGL context after all
  color-managed display is over.

- OCIO_freeOGLState frees allocated state structure used
  for cacheing some GLSL-related stuff.

There're some utility functions in IMB_colormanagent which
are basically proxies to lower level OCIO functions but
which could be used from any place in blender.

Chacheing of movie clip frame on GPU is also removed now,
and either glaDrawPixelsTex or glaDrawPixelsAuto are used
for display now. This is so no code duplication happens
now and no large textures are lurking around in GPU memory.

Known issues:
- Texture buffer and GLSL are no longer checking for
  video card capabilities, possibly could lead to some
  artifacts on crappy drivers/cards.

- Only float buffers are displaying using GLSL, byte
  buffers will still use fallback display method.

  This is to be addressed later.

- If RGB curves are used as a part of display transform,
  GLSL display will also be disabled. This is also thing
  to be solved later.

Additional changes:

- glaDrawPixelsTexScaled will now use RGBA16F as an
  internal format of storing textures when it's used
  to draw float buffer. This is needed so LUT are
  applied without precision loss.
2013-03-29 16:02:27 +00:00

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C++

/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Blender Foundation,
* Sergey Sharybin
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file ED_clip.h
* \ingroup editors
*/
#ifndef __ED_CLIP_H__
#define __ED_CLIP_H__
struct ARegion;
struct bContext;
struct bScreen;
struct ImBuf;
struct Main;
struct Mask;
struct MovieClip;
struct SpaceClip;
struct Scene;
/* ** clip_editor.c ** */
/* common poll functions */
int ED_space_clip_poll(struct bContext *C);
int ED_space_clip_view_clip_poll(struct bContext *C);
int ED_space_clip_tracking_poll(struct bContext *C);
int ED_space_clip_maskedit_poll(struct bContext *C);
int ED_space_clip_maskedit_mask_poll(bContext *C);
void ED_space_clip_get_size(struct SpaceClip *sc, int *width, int *height);
void ED_space_clip_get_size_fl(struct SpaceClip *sc, float size[2]);
void ED_space_clip_get_zoom(struct SpaceClip *sc, struct ARegion *ar, float *zoomx, float *zoomy);
void ED_space_clip_get_aspect(struct SpaceClip *sc, float *aspx, float *aspy);
void ED_space_clip_get_aspect_dimension_aware(struct SpaceClip *sc, float *aspx, float *aspy);
int ED_space_clip_get_clip_frame_number(struct SpaceClip *sc);
struct ImBuf *ED_space_clip_get_buffer(struct SpaceClip *sc);
struct ImBuf *ED_space_clip_get_stable_buffer(struct SpaceClip *sc, float loc[2], float *scale, float *angle);
int ED_space_clip_color_sample(struct SpaceClip *sc, struct ARegion *ar, int mval[2], float r_col[3]);
void ED_clip_update_frame(const struct Main *mainp, int cfra);
int ED_clip_view_selection(const struct bContext *C, struct ARegion *ar, int fit);
void ED_clip_point_undistorted_pos(struct SpaceClip *sc, const float co[2], float r_co[2]);
void ED_clip_point_stable_pos(struct SpaceClip *sc, struct ARegion *ar, float x, float y, float *xr, float *yr);
void ED_clip_point_stable_pos__reverse(struct SpaceClip *sc, struct ARegion *ar, const float co[2], float r_co[2]);
void ED_clip_mouse_pos(struct SpaceClip *sc, struct ARegion *ar, const int mval[2], float co[2]);
int ED_space_clip_check_show_trackedit(struct SpaceClip *sc);
int ED_space_clip_check_show_maskedit(struct SpaceClip *sc);
struct MovieClip *ED_space_clip_get_clip(struct SpaceClip *sc);
void ED_space_clip_set_clip(struct bContext *C, struct bScreen *screen, struct SpaceClip *sc, struct MovieClip *clip);
struct Mask *ED_space_clip_get_mask(struct SpaceClip *sc);
void ED_space_clip_set_mask(struct bContext *C, struct SpaceClip *sc, struct Mask *mask);
/* ** clip_ops.c ** */
void ED_operatormacros_clip(void);
#endif /* ED_CLIP_H */