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st/mesa: don't expose ARB_color_buffer_float without driver support in GL core 

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák 2013-03-28 03:16:25 +01:00
parent 3264c3e997
commit 08275b25cc
1 changed files with 11 additions and 0 deletions
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11
src/mesa/state_tracker/st_extensions.c
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@ -629,6 +629,7 @@ void st_init_extensions(struct st_context *st)
ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
}
/* ARB_color_buffer_float. */
if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
@ -639,6 +640,16 @@ void st_init_extensions(struct st_context *st)
if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
st->clamp_frag_color_in_shader = TRUE;
}
/* For drivers which cannot do color clamping, it's better to just
* disable ARB_color_buffer_float in the core profile, because
* the clamping is deprecated there anyway. */
if (ctx->API == API_OPENGL_CORE &&
(st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
st->clamp_vert_color_in_shader = GL_FALSE;
st->clamp_frag_color_in_shader = GL_FALSE;
ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
}
}
if (screen->fence_finish) {