diff options
| author | Thomas Fischer <tjfischer98@gmail.com> | 2018-06-10 16:37:40 +0200 |
|---|---|---|
| committer | Uli Schlachter <psychon@znc.in> | 2018-06-10 16:37:40 +0200 |
| commit | 97dc700ee637decc53c3b43fac4311dc88d65040 (patch) | |
| tree | 04045ad3882faae6a461ae2ef8207e7be24c4da2 | |
| parent | 1019b266a4e7cc0e8e7d1a271cd85a2a364cb3ff (diff) | |
Improve opengl tutorial
Signed-off-by: Uli Schlachter <psychon@znc.in>
| -rw-r--r-- | opengl.mdwn | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/opengl.mdwn b/opengl.mdwn index 4573512..bc64ba3 100644 --- a/opengl.mdwn +++ b/opengl.mdwn @@ -51,6 +51,28 @@ To maintain backward compatibility and providing an incremental porting path, th #include <GL/glx.h> #include <GL/gl.h> + /* + Attribs filter the list of FBConfigs returned by glXChooseFBConfig(). + Visual attribs further described in glXGetFBConfigAttrib(3) + */ + static int visual_attribs[] = + { + GLX_X_RENDERABLE, True, + GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, + GLX_RENDER_TYPE, GLX_RGBA_BIT, + GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR, + GLX_RED_SIZE, 8, + GLX_GREEN_SIZE, 8, + GLX_BLUE_SIZE, 8, + GLX_ALPHA_SIZE, 8, + GLX_DEPTH_SIZE, 24, + GLX_STENCIL_SIZE, 8, + GLX_DOUBLEBUFFER, True, + //GLX_SAMPLE_BUFFERS , 1, + //GLX_SAMPLES , 4, + None + }; + void draw() { glClearColor(0.2, 0.4, 0.9, 1.0); @@ -95,15 +117,17 @@ To maintain backward compatibility and providing an incremental porting path, th { int visualID = 0; - /* Query framebuffer configurations */ + /* Query framebuffer configurations that match visual_attribs */ GLXFBConfig *fb_configs = 0; int num_fb_configs = 0; - fb_configs = glXGetFBConfigs(display, default_screen, &num_fb_configs); + fb_configs = glXChooseFBConfig(display, default_screen, visual_attribs, &num_fb_configs); if(!fb_configs || num_fb_configs == 0) { fprintf(stderr, "glXGetFBConfigs failed\n"); return -1; } + + printf("Found %d matching FB configs", num_fb_configs); /* Select first framebuffer config and query visualID */ GLXFBConfig fb_config = fb_configs[0]; |