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new glx: create a OpenGL 3.0 context 

Older version of OpenGL won't be supported by the new glx backend.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-03-09 16:06:57 +00:00
parent c67eb62ce8
commit fb155c9769
No known key found for this signature in database
GPG Key ID: 37C999F617EA1A47
2 changed files with 57 additions and 13 deletions
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68
src/backend/gl/glx.c
View File

@ -49,6 +49,14 @@ struct _glx_data {
GLXContext ctx;
};
#define glXGetFBConfigAttribChecked(a, b, attr, c) \
do { \
if (glXGetFBConfigAttrib(a, b, attr, c)) { \
log_info("Cannot get FBConfig attribute " #attr); \
continue; \
} \
} while (0)
struct glx_fbconfig_info *glx_find_fbconfig(Display *dpy, int screen, struct xvisual_info m) {
log_debug("Looking for FBConfig for RGBA%d%d%d%d, depth %d", m.red_size,
m.blue_size, m.green_size, m.alpha_size, m.visual_depth);
@ -74,13 +82,6 @@ struct glx_fbconfig_info *glx_find_fbconfig(Display *dpy, int screen, struct xvi
}, &ncfg);
// clang-format on
#define glXGetFBConfigAttribChecked(a, b, attr, c) \
do { \
if (glXGetFBConfigAttrib(a, b, attr, c)) { \
log_info("Cannot get FBConfig attribute " #attr); \
continue; \
} \
} while (0)
int texture_tgts, y_inverted, texture_fmt;
bool found = false;
int min_cost = INT_MAX;
@ -141,7 +142,6 @@ struct glx_fbconfig_info *glx_find_fbconfig(Display *dpy, int screen, struct xvi
}
min_cost = depthbuf + stencil + bufsize * (doublebuf + 1);
}
#undef glXGetFBConfigAttribChecked
free(cfg);
if (!found) {
return NULL;
@ -245,17 +245,54 @@ static backend_t *glx_init(session_t *ps) {
goto end;
}
if (glXGetConfig(ps->dpy, pvis, GLX_RGBA, &value) || !value) {
log_error("Root visual is a color index visual, not supported");
goto end;
}
// Ensure GLX_EXT_texture_from_pixmap exists
if (!glxext.has_GLX_EXT_texture_from_pixmap) {
log_error("GLX_EXT_texture_from_pixmap is not supported by your driver");
goto end;
}
// Get GLX context
gd->ctx = glXCreateContext(ps->dpy, pvis, NULL, GL_TRUE);
if (!glxext.has_GLX_ARB_create_context) {
log_error("GLX_ARB_create_context is not supported by your driver");
goto end;
}
if (!gd->ctx) {
log_error("Failed to get GLX context.");
// Find a fbconfig with visualid matching the one from the target win, so we can
// be sure that the fbconfig is compatible with our target window.
int ncfgs;
GLXFBConfig *cfg = glXGetFBConfigs(gd->display, gd->screen, &ncfgs);
bool found = false;
for (int i = 0; i < ncfgs; i++) {
int visualid;
glXGetFBConfigAttribChecked(gd->display, cfg[i], GLX_VISUAL_ID, &visualid);
if ((VisualID)visualid != pvis->visualid) {
continue;
}
gd->ctx = glXCreateContextAttribsARB(ps->dpy, cfg[i], 0, true,
(int[]){
GLX_CONTEXT_MAJOR_VERSION_ARB,
3,
GLX_CONTEXT_MINOR_VERSION_ARB,
0,
0,
});
free(cfg);
if (!gd->ctx) {
log_error("Failed to get GLX context.");
goto end;
}
found = true;
break;
}
if (!found) {
log_error("Couldn't find a suitable fbconfig for the target window");
goto end;
}
@ -341,7 +378,7 @@ glx_bind_pixmap(backend_t *base, xcb_pixmap_t pixmap, struct xvisual_info fmt, b
else
tex_tgt = GLX_TEXTURE_2D_EXT;
log_debug("depth %d, tgt %#x, rgba %d\n", fmt.visual_depth, tex_tgt,
log_debug("depth %d, tgt %#x, rgba %d", fmt.visual_depth, tex_tgt,
(GLX_TEXTURE_FORMAT_RGBA_EXT == fbcfg->texture_fmt));
GLint attrs[] = {
@ -473,6 +510,7 @@ PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI;
PFNGLXSWAPINTERVALMESAPROC glXSwapIntervalMESA;
PFNGLXBINDTEXIMAGEEXTPROC glXBindTexImageEXT;
PFNGLXRELEASETEXIMAGEEXTPROC glXReleaseTexImageEXT;
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB;
void glxext_init(Display *dpy, int screen) {
if (glxext.initialized) {
@ -486,6 +524,7 @@ void glxext_init(Display *dpy, int screen) {
check_ext(GLX_MESA_swap_control);
check_ext(GLX_EXT_swap_control);
check_ext(GLX_EXT_texture_from_pixmap);
check_ext(GLX_ARB_create_context);
check_ext(GLX_EXT_buffer_age);
#undef check_ext
@ -511,5 +550,8 @@ void glxext_init(Display *dpy, int screen) {
if (!lookup(glXBindTexImageEXT) || !lookup(glXReleaseTexImageEXT)) {
glxext.has_GLX_EXT_texture_from_pixmap = false;
}
if (!lookup(glXCreateContextAttribsARB)) {
glxext.has_GLX_ARB_create_context = false;
}
#undef lookup
}

2
src/backend/gl/glx.h
View File

@ -52,6 +52,7 @@ struct glxext_info {
bool has_GLX_MESA_swap_control;
bool has_GLX_EXT_swap_control;
bool has_GLX_EXT_texture_from_pixmap;
bool has_GLX_ARB_create_context;
bool has_GLX_EXT_buffer_age;
};
@ -66,5 +67,6 @@ extern PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI;
extern PFNGLXSWAPINTERVALMESAPROC glXSwapIntervalMESA;
extern PFNGLXBINDTEXIMAGEEXTPROC glXBindTexImageEXT;
extern PFNGLXRELEASETEXIMAGEEXTPROC glXReleaseTexImageEXT;
extern PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB;
void glxext_init(Display *, int screen);