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Brian Paul wrote:
> Corbin Simpson wrote:
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>>
>> - From 1f80772f964bd2253a2d569eea4d93fe7a1baa1f Mon Sep 17 00:00:00 2001
>> From: Corbin Simpson <[EMAIL PROTECTED]>
>> Date: Sat, 16 Aug 2008 08:22:53 -0700
>> Subject: [PATCH] Fix GLSL detection
>> Look for extensions instead of OGL 2.0, this lets non-2.0 drivers do
>> GLSL.
>>
>> - ---
>> progs/util/shaderutil.c | 12 +++++-------
>> 1 files changed, 5 insertions(+), 7 deletions(-)
>>
>> diff --git a/progs/util/shaderutil.c b/progs/util/shaderutil.c
>> index 477209a..bd000a6 100644
>> - --- a/progs/util/shaderutil.c
>> +++ b/progs/util/shaderutil.c
>> @@ -27,14 +27,12 @@ Init(void)
>> GLboolean
>> ShadersSupported(void)
>> {
>> - - const char *version;
>> - -
>> - - version = (const char *) glGetString(GL_VERSION);
>> - - if (version[0] != '2' || version[1] != '.') {
>> - - printf("GL_RENDERER = %s\n",(const char *)
>> glGetString(GL_RENDERER));
>> - - return GL_FALSE;
>> + if (glutExtensionSupported("GL_ARB_vertex_shader")
>> + && glutExtensionSupported("GL_ARB_fragment_shader")
>> + && glutExtensionSupported("GL_ARB_shader_objects")) {
>> + return GL_TRUE;
>> }
>> - - return GL_TRUE;
>> + return GL_FALSE;
>> }
>
> Actually, that isn't exactly correct. The demos that use the
> shaderutil.c code are based on the OpenGL 2.x API, not the ARB GLSL
> extensions.
>
> The above might work for Mesa, but it could break with other OpenGL
> implementations.
>
> If you want to re-spin that patch, you should keep the test for GL
> "2.x". If that fails, check for the ARB extensions and print a warning
> message that the program might crash (because of unresolved symbols).
Respun. This is pretty much just a patch to let me test GLSL stuff
without actually advertising OGL 2.0, since r300 is still missing fog
coords and occlusion queries. I figured that it might be useful to the
Mesa core.
Thanks,
~ C.
- From 301b976fd4dbf22a222bc6711379c7d6f937d72b Mon Sep 17 00:00:00 2001
From: Corbin Simpson <[EMAIL PROTECTED]>
Date: Sat, 16 Aug 2008 09:34:11 -0700
Subject: [PATCH] Fix GLSL detection
If 2.x isn't present, try ARB GLSL instead.
- ---
progs/util/shaderutil.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/progs/util/shaderutil.c b/progs/util/shaderutil.c
index 477209a..2532490 100644
- --- a/progs/util/shaderutil.c
+++ b/progs/util/shaderutil.c
@@ -30,11 +30,15 @@ ShadersSupported(void)
const char *version;
version = (const char *) glGetString(GL_VERSION);
- - if (version[0] != '2' || version[1] != '.') {
- - printf("GL_RENDERER = %s\n",(const char *)
glGetString(GL_RENDERER));
- - return GL_FALSE;
+ if (version[0] == '2' && version[1] == '.')
+ return GL_TRUE;
+ else if (glutExtensionSupported("GL_ARB_vertex_shader")
+ && glutExtensionSupported("GL_ARB_fragment_shader")
+ && glutExtensionSupported("GL_ARB_shader_objects")) {
+ printf("Warning: Using ARB GLSL instead of OpenGL 2.x.\n");
+ return GL_TRUE;
}
- - return GL_TRUE;
+ return GL_FALSE;
}
- --
1.5.6.4
- --
~ Corbin Simpson
<[EMAIL PROTECTED]>
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