diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2005-11-04 16:41:06 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2005-11-04 16:41:06 +0000 |
| commit | c12ee99d119debe1a421a77c1cc6d99d958ae94b (patch) | |
| tree | ce4c48ba481ece5cddff23fbc754ab31f795584b /src/mesa | |
| parent | f805cdfedff6e502ab30285d6cd50a9db828376b (diff) | |
MESA_GLX_ALPHA_BITS env var to force visual with alpha channel
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/x11/fakeglx.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/mesa/drivers/x11/fakeglx.c b/src/mesa/drivers/x11/fakeglx.c index cd26bade30..1933fed067 100644 --- a/src/mesa/drivers/x11/fakeglx.c +++ b/src/mesa/drivers/x11/fakeglx.c @@ -379,6 +379,18 @@ default_depth_bits(void) } static GLint +default_alpha_bits(void) +{ + int aBits; + const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS"); + if (aEnv) + aBits = _mesa_atoi(aEnv); + else + aBits = 0; + return aBits; +} + +static GLint default_accum_bits(void) { return 16; @@ -400,6 +412,7 @@ create_glx_visual( Display *dpy, XVisualInfo *visinfo ) int vislevel; GLint zBits = default_depth_bits(); GLint accBits = default_accum_bits(); + GLboolean alphaFlag = default_alpha_bits() > 0; vislevel = level_of_visual( dpy, visinfo ); if (vislevel) { @@ -437,7 +450,7 @@ create_glx_visual( Display *dpy, XVisualInfo *visinfo ) /* can be done? They should use glXChooseVisual(). */ return save_glx_visual( dpy, visinfo, GL_TRUE, /* rgb */ - GL_FALSE, /* alpha */ + alphaFlag, /* alpha */ GL_TRUE, /* double */ GL_FALSE, /* stereo */ zBits, @@ -1013,7 +1026,7 @@ choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig ) parselist++; { GLint size = *parselist++; - alpha_flag = size>0 ? 1 : 0; + alpha_flag = size ? GL_TRUE : GL_FALSE; } break; case GLX_DEPTH_SIZE: @@ -1223,6 +1236,10 @@ choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig ) depth_size = default_depth_bits(); } + if (!alpha_flag) { + alpha_flag = default_alpha_bits() > 0; + } + /* we only support one size of stencil and accum buffers. */ if (stencil_size > 0) stencil_size = STENCIL_BITS; |