picom/src/opengl.h

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// SPDX-License-Identifier: MIT
/*
* Compton - a compositor for X11
*
* Based on `xcompmgr` - Copyright (c) 2003, Keith Packard
*
* Copyright (c) 2011-2013, Christopher Jeffrey
* See LICENSE-mit for more information.
*
*/
#pragma once
#include "common.h"
#include <ctype.h>
#include <locale.h>
#ifdef DEBUG_GLX_ERR
/**
* Get a textual representation of an OpenGL error.
*/
static inline const char *
glx_dump_err_str(GLenum err) {
switch (err) {
CASESTRRET(GL_NO_ERROR);
CASESTRRET(GL_INVALID_ENUM);
CASESTRRET(GL_INVALID_VALUE);
CASESTRRET(GL_INVALID_OPERATION);
CASESTRRET(GL_INVALID_FRAMEBUFFER_OPERATION);
CASESTRRET(GL_OUT_OF_MEMORY);
CASESTRRET(GL_STACK_UNDERFLOW);
CASESTRRET(GL_STACK_OVERFLOW);
}
return NULL;
}
/**
* Check for GLX error.
*
* http://blog.nobel-joergensen.com/2013/01/29/debugging-opengl-using-glgeterror/
*/
static inline void
glx_check_err_(session_t *ps, const char *func, int line) {
if (!ps->psglx->context) return;
GLenum err = GL_NO_ERROR;
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while (GL_NO_ERROR != (err = glGetError())) {
print_timestamp(ps);
printf("%s():%d: GLX error ", func, line);
const char *errtext = glx_dump_err_str(err);
if (errtext) {
printf_dbg("%s\n", errtext);
}
else {
printf_dbg("%d\n", err);
}
}
}
#define glx_check_err(ps) glx_check_err_(ps, __func__, __LINE__)
#else
#define glx_check_err(ps) ((void) 0)
#endif
/**
* Check if a word is in string.
*/
static inline bool
wd_is_in_str(const char *haystick, const char *needle) {
if (!haystick)
return false;
assert(*needle);
const char *pos = haystick - 1;
while ((pos = strstr(pos + 1, needle))) {
// Continue if it isn't a word boundary
if (((pos - haystick) && !isspace(*(pos - 1)))
|| (strlen(pos) > strlen(needle) && !isspace(pos[strlen(needle)])))
continue;
return true;
}
return false;
}
/**
* Check if a GLX extension exists.
*/
static inline bool
glx_hasglxext(session_t *ps, const char *ext) {
const char *glx_exts = glXQueryExtensionsString(ps->dpy, ps->scr);
if (!glx_exts) {
printf_errf("(): Failed get GLX extension list.");
return false;
}
bool found = wd_is_in_str(glx_exts, ext);
if (!found)
printf_errf("(): Missing GLX extension %s.", ext);
return found;
}
/**
* Check if a GLX extension exists.
*/
static inline bool
glx_hasglext(session_t *ps, const char *ext) {
const char *gl_exts = (const char *) glGetString(GL_EXTENSIONS);
if (!gl_exts) {
printf_errf("(): Failed get GL extension list.");
return false;
}
bool found = wd_is_in_str(gl_exts, ext);
if (!found)
printf_errf("(): Missing GL extension %s.", ext);
return found;
}
bool
glx_dim_dst(session_t *ps, int dx, int dy, int width, int height, float z,
GLfloat factor, const region_t *reg_tgt);
bool
glx_render(session_t *ps, const glx_texture_t *ptex,
int x, int y, int dx, int dy, int width, int height, int z,
double opacity, bool argb, bool neg,
const region_t *reg_tgt,
const glx_prog_main_t *pprogram);
bool
glx_init(session_t *ps, bool need_render);
void
glx_destroy(session_t *ps);
bool
glx_reinit(session_t *ps, bool need_render);
void
glx_on_root_change(session_t *ps);
bool
glx_init_blur(session_t *ps);
#ifdef CONFIG_OPENGL
bool
glx_load_prog_main(session_t *ps,
const char *vshader_str, const char *fshader_str,
glx_prog_main_t *pprogram);
#endif
bool
glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
unsigned width, unsigned height, unsigned depth);
void
glx_release_pixmap(session_t *ps, glx_texture_t *ptex);
void glx_paint_pre(session_t *ps, region_t *preg)
__attribute__((nonnull(1, 2)));
/**
* Check if a texture is binded, or is binded to the given pixmap.
*/
static inline bool
glx_tex_binded(const glx_texture_t *ptex, xcb_pixmap_t pixmap) {
return ptex && ptex->glpixmap && ptex->texture
&& (!pixmap || pixmap == ptex->pixmap);
}
void
glx_set_clip(session_t *ps, const region_t *reg);
bool
glx_blur_dst(session_t *ps, int dx, int dy, int width, int height, float z,
GLfloat factor_center,
const region_t *reg_tgt,
glx_blur_cache_t *pbc);
GLuint
glx_create_shader(GLenum shader_type, const char *shader_str);
GLuint
glx_create_program(const GLuint * const shaders, int nshaders);
GLuint
glx_create_program_from_str(const char *vert_shader_str,
const char *frag_shader_str);
unsigned char *
glx_take_screenshot(session_t *ps, int *out_length);
/**
* Free a glx_texture_t.
*/
static inline void
free_texture(session_t *ps, glx_texture_t **pptex) {
glx_texture_t *ptex = *pptex;
// Quit if there's nothing
if (!ptex)
return;
glx_release_pixmap(ps, ptex);
free_texture_r(ps, &ptex->texture);
// Free structure itself
free(ptex);
*pptex = NULL;
assert(!*pptex);
}
/**
* Free GLX part of paint_t.
*/
static inline void
free_paint_glx(session_t *ps, paint_t *ppaint) {
free_texture(ps, &ppaint->ptex);
}
/**
* Free GLX part of win.
*/
static inline void
free_win_res_glx(session_t *ps, win *w) {
free_paint_glx(ps, &w->paint);
free_paint_glx(ps, &w->shadow_paint);
#ifdef CONFIG_OPENGL
free_glx_bc(ps, &w->glx_blur_cache);
#endif
}