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Refactor FBConfig lookup

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Background: To bind a Xorg window content to a OpenGL FBConfig, which
has to match the color format the Xorg window is using.

Previously, compton just find a FBConfig that has the same depth. This
led to chjj/compton#477, which has been fixed by a ugly hack.

The commit refactor the lookup mechanism to take as much into
consideration as we reasonably can. Hopefully preventing similar
breakages in the future.

Also, some code sharing between the old and new glx backend.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-02-03 16:41:04 +00:00
parent 7ac351e5b5
commit 8922312e42
12 changed files with 271 additions and 514 deletions
Download Patch File Download Diff File Expand all files Collapse all files

230
src/opengl.c
View File

@ -25,173 +25,10 @@
#include "win.h"
#include "region.h"
#include "backend/gl/gl_common.h"
#include "backend/gl/glx.h"
#include "opengl.h"
static inline int
glx_cmp_fbconfig_cmpattr(session_t *ps,
const glx_fbconfig_t *pfbc_a, const glx_fbconfig_t *pfbc_b,
int attr) {
int attr_a = 0, attr_b = 0;
// TODO: Error checking
glXGetFBConfigAttrib(ps->dpy, pfbc_a->cfg, attr, &attr_a);
glXGetFBConfigAttrib(ps->dpy, pfbc_b->cfg, attr, &attr_b);
return attr_a - attr_b;
}
/**
* Compare two GLX FBConfig's to find the preferred one.
*/
static int
glx_cmp_fbconfig(session_t *ps,
const glx_fbconfig_t *pfbc_a, const glx_fbconfig_t *pfbc_b) {
int result = 0;
if (!pfbc_a)
return -1;
if (!pfbc_b)
return 1;
int tmpattr;
// Avoid 10-bit colors
glXGetFBConfigAttrib(ps->dpy, pfbc_a->cfg, GLX_RED_SIZE, &tmpattr);
if (tmpattr != 8)
return -1;
glXGetFBConfigAttrib(ps->dpy, pfbc_b->cfg, GLX_RED_SIZE, &tmpattr);
if (tmpattr != 8)
return 1;
#define P_CMPATTR_LT(attr) { if ((result = glx_cmp_fbconfig_cmpattr(ps, pfbc_a, pfbc_b, (attr)))) return -result; }
#define P_CMPATTR_GT(attr) { if ((result = glx_cmp_fbconfig_cmpattr(ps, pfbc_a, pfbc_b, (attr)))) return result; }
P_CMPATTR_LT(GLX_BIND_TO_TEXTURE_RGBA_EXT);
P_CMPATTR_LT(GLX_DOUBLEBUFFER);
P_CMPATTR_LT(GLX_STENCIL_SIZE);
P_CMPATTR_LT(GLX_DEPTH_SIZE);
P_CMPATTR_GT(GLX_BIND_TO_MIPMAP_TEXTURE_EXT);
return 0;
}
/**
* @brief Update the FBConfig of given depth.
*/
static inline void
glx_update_fbconfig_bydepth(session_t *ps, int depth, glx_fbconfig_t *pfbcfg) {
// Make sure the depth is sane
if (depth < 0 || depth > OPENGL_MAX_DEPTH)
return;
// Compare new FBConfig with current one
if (glx_cmp_fbconfig(ps, ps->psglx->fbconfigs[depth], pfbcfg) < 0) {
log_trace("(depth %d): %p overrides %p, target %#x.", depth,
pfbcfg->cfg,
ps->psglx->fbconfigs[depth] ? ps->psglx->fbconfigs[depth]->cfg:
0,
pfbcfg->texture_tgts);
if (!ps->psglx->fbconfigs[depth]) {
ps->psglx->fbconfigs[depth] = cmalloc(glx_fbconfig_t);
}
(*ps->psglx->fbconfigs[depth]) = *pfbcfg;
}
}
/**
* Get GLX FBConfigs for all depths.
*/
static bool
glx_update_fbconfig(session_t *ps) {
// Acquire all FBConfigs and loop through them
int nele = 0;
GLXFBConfig* pfbcfgs = glXGetFBConfigs(ps->dpy, ps->scr, &nele);
for (GLXFBConfig *pcur = pfbcfgs; pcur < pfbcfgs + nele; pcur++) {
glx_fbconfig_t fbinfo = {
.cfg = *pcur,
.texture_fmt = 0,
.texture_tgts = 0,
.y_inverted = false,
};
int id = (int) (pcur - pfbcfgs);
int depth = 0, depth_alpha = 0, val = 0;
// Skip over multi-sampled visuals
// http://people.freedesktop.org/~glisse/0001-glx-do-not-use-multisample-visual-config-for-front-o.patch
#ifdef GLX_SAMPLES
if (Success == glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_SAMPLES, &val)
&& val > 1)
continue;
#endif
if (Success != glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_BUFFER_SIZE, &depth)
|| Success != glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_ALPHA_SIZE, &depth_alpha)) {
log_error("Failed to retrieve buffer size and alpha size of FBConfig %d.", id);
continue;
}
if (Success != glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_BIND_TO_TEXTURE_TARGETS_EXT, &fbinfo.texture_tgts)) {
log_error("Failed to retrieve BIND_TO_TEXTURE_TARGETS_EXT of FBConfig %d.", id);
continue;
}
int visualdepth = 0;
{
XVisualInfo *pvi = glXGetVisualFromFBConfig(ps->dpy, *pcur);
if (!pvi) {
// On nvidia-drivers-325.08 this happens slightly too often...
// log_error("Failed to retrieve X Visual of FBConfig %d.", id);
continue;
}
visualdepth = pvi->depth;
cxfree(pvi);
}
bool rgb = false;
bool rgba = false;
if (depth >= 32 && depth_alpha && Success == glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_BIND_TO_TEXTURE_RGBA_EXT, &val) && val)
rgba = true;
if (Success == glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_BIND_TO_TEXTURE_RGB_EXT, &val) && val)
rgb = true;
if (Success == glXGetFBConfigAttrib(ps->dpy, *pcur, GLX_Y_INVERTED_EXT, &val))
fbinfo.y_inverted = val;
{
int tgtdpt = depth - depth_alpha;
if (tgtdpt == visualdepth && tgtdpt < 32 && rgb) {
fbinfo.texture_fmt = GLX_TEXTURE_FORMAT_RGB_EXT;
glx_update_fbconfig_bydepth(ps, tgtdpt, &fbinfo);
}
}
if (depth == visualdepth && rgba) {
fbinfo.texture_fmt = GLX_TEXTURE_FORMAT_RGBA_EXT;
glx_update_fbconfig_bydepth(ps, depth, &fbinfo);
}
}
cxfree(pfbcfgs);
// Sanity checks
if (!ps->psglx->fbconfigs[ps->depth]) {
log_error("No FBConfig found for default depth %d.", ps->depth);
return false;
}
if (!ps->psglx->fbconfigs[32]) {
log_error("No FBConfig found for depth 32. compton will try to continue.");
} else {
log_trace("%d-bit: %p, 32-bit: %p", ps->depth,
ps->psglx->fbconfigs[ps->depth]->cfg, ps->psglx->fbconfigs[32]->cfg);
}
return true;
}
static inline XVisualInfo *
get_visualinfo_from_visual(session_t *ps, xcb_visualid_t visual) {
XVisualInfo vreq = { .visualid = visual };
@ -200,31 +37,6 @@ get_visualinfo_from_visual(session_t *ps, xcb_visualid_t visual) {
return XGetVisualInfo(ps->dpy, VisualIDMask, &vreq, &nitems);
}
#ifdef DEBUG_GLX_DEBUG_CONTEXT
static inline GLXFBConfig
get_fbconfig_from_visualinfo(session_t *ps, const XVisualInfo *visualinfo) {
int nelements = 0;
GLXFBConfig *fbconfigs = glXGetFBConfigs(ps->dpy, visualinfo->screen,
&nelements);
for (int i = 0; i < nelements; ++i) {
int visual_id = 0;
if (Success == glXGetFBConfigAttrib(ps->dpy, fbconfigs[i], GLX_VISUAL_ID, &visual_id)
&& visual_id == visualinfo->visualid)
return fbconfigs[i];
}
return NULL;
}
static void
glx_debug_msg_callback(GLenum source, GLenum type,
GLuint id, GLenum severity, GLsizei length, const GLchar *message,
GLvoid *userParam) {
log_trace("source 0x%04X, type 0x%04X, id %u, severity 0x%0X, \"%s\"",
source, type, id, severity, message);
}
#endif
/**
* Initialize OpenGL.
*/
@ -375,10 +187,6 @@ glx_init(session_t *ps, bool need_render) {
}
}
// Acquire FBConfigs
if (need_render && !glx_update_fbconfig(ps))
goto glx_init_end;
// Render preparations
if (need_render) {
glx_on_root_change(ps);
@ -451,12 +259,6 @@ glx_destroy(session_t *ps) {
gl_check_err();
// Free FBConfigs
for (int i = 0; i <= OPENGL_MAX_DEPTH; ++i) {
free(ps->psglx->fbconfigs[i]);
ps->psglx->fbconfigs[i] = NULL;
}
// Destroy GLX context
if (ps->psglx->context) {
glXDestroyContext(ps->dpy, ps->psglx->context);
@ -694,7 +496,7 @@ glx_load_prog_main(session_t *ps,
*/
bool
glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
unsigned width, unsigned height, unsigned depth) {
unsigned width, unsigned height, const struct glx_fbconfig_info *fbcfg) {
if (ps->o.backend != BKEND_GLX && ps->o.backend != BKEND_XR_GLX_HYBRID)
return true;
@ -703,6 +505,7 @@ glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
return false;
}
assert(fbcfg);
glx_texture_t *ptex = *pptex;
bool need_release = true;
@ -715,7 +518,6 @@ glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
.target = 0,
.width = 0,
.height = 0,
.depth = 0,
.y_inverted = false,
};
@ -731,11 +533,12 @@ glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
}
// Create GLX pixmap
unsigned depth;
if (!ptex->glpixmap) {
need_release = false;
// Retrieve pixmap parameters, if they aren't provided
if (!(width && height && depth)) {
if (!(width && height)) {
Window rroot = None;
int rx = 0, ry = 0;
unsigned rbdwid = 0;
@ -751,45 +554,38 @@ glx_bind_pixmap(session_t *ps, glx_texture_t **pptex, xcb_pixmap_t pixmap,
}
}
const glx_fbconfig_t *pcfg = ps->psglx->fbconfigs[depth];
if (!pcfg) {
log_error("Couldn't find FBConfig with requested depth %d.", depth);
return false;
}
// Determine texture target, copied from compiz
// The assumption we made here is the target never changes based on any
// pixmap-specific parameters, and this may change in the future
GLenum tex_tgt = 0;
if (GLX_TEXTURE_2D_BIT_EXT & pcfg->texture_tgts
if (GLX_TEXTURE_2D_BIT_EXT & fbcfg->texture_tgts
&& ps->psglx->has_texture_non_power_of_two)
tex_tgt = GLX_TEXTURE_2D_EXT;
else if (GLX_TEXTURE_RECTANGLE_BIT_EXT & pcfg->texture_tgts)
else if (GLX_TEXTURE_RECTANGLE_BIT_EXT & fbcfg->texture_tgts)
tex_tgt = GLX_TEXTURE_RECTANGLE_EXT;
else if (!(GLX_TEXTURE_2D_BIT_EXT & pcfg->texture_tgts))
else if (!(GLX_TEXTURE_2D_BIT_EXT & fbcfg->texture_tgts))
tex_tgt = GLX_TEXTURE_RECTANGLE_EXT;
else
tex_tgt = GLX_TEXTURE_2D_EXT;
log_debug("depth %d, tgt %#x, rgba %d", depth, tex_tgt,
(GLX_TEXTURE_FORMAT_RGBA_EXT == pcfg->texture_fmt));
(GLX_TEXTURE_FORMAT_RGBA_EXT == fbcfg->texture_fmt));
GLint attrs[] = {
GLX_TEXTURE_FORMAT_EXT,
pcfg->texture_fmt,
fbcfg->texture_fmt,
GLX_TEXTURE_TARGET_EXT,
tex_tgt,
0,
};
ptex->glpixmap = glXCreatePixmap(ps->dpy, pcfg->cfg, pixmap, attrs);
ptex->glpixmap = glXCreatePixmap(ps->dpy, fbcfg->cfg, pixmap, attrs);
ptex->pixmap = pixmap;
ptex->target = (GLX_TEXTURE_2D_EXT == tex_tgt ? GL_TEXTURE_2D:
GL_TEXTURE_RECTANGLE);
ptex->width = width;
ptex->height = height;
ptex->depth = depth;
ptex->y_inverted = pcfg->y_inverted;
ptex->y_inverted = fbcfg->y_inverted;
}
if (!ptex->glpixmap) {
log_error("Failed to allocate GLX pixmap.");
@ -1186,8 +982,6 @@ glx_render(session_t *ps, const glx_texture_t *ptex,
return false;
}
argb = argb || (GLX_TEXTURE_FORMAT_RGBA_EXT ==
ps->psglx->fbconfigs[ptex->depth]->texture_fmt);
const bool has_prog = pprogram && pprogram->prog;
bool dual_texture = false;