gl_cmap.h
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/*
* gl_cmap.h
*
* OpenGL float texture -> color mapping
*
* Copyright (C) 2013-2014 Sylvain Munaut
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __FOSPHOR_GL_CMAP_H__
#define __FOSPHOR_GL_CMAP_H__
/*! \defgroup gl/cmap
* @{
*/
/*! \file gl_cmap.h
* \brief OpenGL float texture to color mapping
*/
#include <stdint.h>
#include "gl_platform.h"
struct fosphor_gl_cmap_ctx;
enum fosphor_gl_cmap_mode {
GL_CMAP_MODE_NEAREST,
GL_CMAP_MODE_BILINEAR,
GL_CMAP_MODE_BICUBIC,
};
struct fosphor_gl_cmap_ctx *fosphor_gl_cmap_init(void);
void fosphor_gl_cmap_release(struct fosphor_gl_cmap_ctx *cmap_ctx);
void fosphor_gl_cmap_enable(struct fosphor_gl_cmap_ctx *cmap_ctx,
GLuint tex_id, GLuint cmap_id,
float scale, float offset,
enum fosphor_gl_cmap_mode mode);
void fosphor_gl_cmap_disable(void);
void fosphor_gl_cmap_draw_scale(GLuint cmap_id,
float x0, float x1, float y0, float y1);
typedef int (*gl_cmap_gen_func_t)(uint32_t *rgba, int N, void *arg);
int fosphor_gl_cmap_generate(GLuint *cmap_id, gl_cmap_gen_func_t gfn, void *gfn_arg, int N);
/*! @} */
#endif /* __FOSPHOR_GL_CMAP_H__ */
gl_platform.h
Wrapper to select proper OpenGL headers for various platforms.
fosphor_gl_cmap_generate
int fosphor_gl_cmap_generate(GLuint *cmap_id, gl_cmap_gen_func_t gfn, void *gfn_arg, int N)
fosphor_gl_cmap_disable
void fosphor_gl_cmap_disable(void)
fosphor_gl_cmap_enable
void fosphor_gl_cmap_enable(struct fosphor_gl_cmap_ctx *cmap_ctx, GLuint tex_id, GLuint cmap_id, float scale, float offset, enum fosphor_gl_cmap_mode mode)
fosphor_gl_cmap_release
void fosphor_gl_cmap_release(struct fosphor_gl_cmap_ctx *cmap_ctx)
fosphor_gl_cmap_init
struct fosphor_gl_cmap_ctx * fosphor_gl_cmap_init(void)
fosphor_gl_cmap_draw_scale
void fosphor_gl_cmap_draw_scale(GLuint cmap_id, float x0, float x1, float y0, float y1)
fosphor_gl_cmap_mode
fosphor_gl_cmap_mode
Definition: gl_cmap.h:40
gl_cmap_gen_func_t
int(* gl_cmap_gen_func_t)(uint32_t *rgba, int N, void *arg)
Definition: gl_cmap.h:59
GL_CMAP_MODE_BICUBIC
@ GL_CMAP_MODE_BICUBIC
Definition: gl_cmap.h:43
GL_CMAP_MODE_BILINEAR
@ GL_CMAP_MODE_BILINEAR
Definition: gl_cmap.h:42
GL_CMAP_MODE_NEAREST
@ GL_CMAP_MODE_NEAREST
Definition: gl_cmap.h:41