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utils: slight improvements to gl_bind_texture().

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This commit is contained in:
Gwenole Beauchesne 2012-01-13 15:03:38 +01:00
parent 30ef6802d6
commit 9b9c049a67
1 changed files with 55 additions and 32 deletions
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87
gst-libs/gst/vaapi/gstvaapiutils_glx.c
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@ -166,6 +166,39 @@ gl_get_texture_param(GLenum target, GLenum param, guint *pval)
return TRUE;
}
/**
* gl_get_texture_binding:
* @target: a texture target
*
* Determines the texture binding type for the specified target.
*
* Return value: texture binding type for @target
*/
static GLenum
gl_get_texture_binding(GLenum target)
{
GLenum binding;
switch (target) {
case GL_TEXTURE_1D:
binding = GL_TEXTURE_BINDING_1D;
break;
case GL_TEXTURE_2D:
binding = GL_TEXTURE_BINDING_2D;
break;
case GL_TEXTURE_3D:
binding = GL_TEXTURE_BINDING_3D;
break;
case GL_TEXTURE_RECTANGLE_ARB:
binding = GL_TEXTURE_BINDING_RECTANGLE_ARB;
break;
default:
binding = 0;
break;
}
return binding;
}
/**
* gl_set_bgcolor:
* @color: the requested RGB color
@ -455,42 +488,32 @@ gl_swap_buffers(GLContextState *cs)
gboolean
gl_bind_texture(GLTextureState *ts, GLenum target, GLuint texture)
{
ts->target = target;
ts->old_texture = 0;
ts->was_bound = 0;
ts->was_enabled = glIsEnabled(target);
if (!ts->was_enabled)
glEnable(target);
GLenum binding;
GLenum texture_binding;
switch (target) {
case GL_TEXTURE_1D:
texture_binding = GL_TEXTURE_BINDING_1D;
break;
case GL_TEXTURE_2D:
texture_binding = GL_TEXTURE_BINDING_2D;
break;
case GL_TEXTURE_3D:
texture_binding = GL_TEXTURE_BINDING_3D;
break;
case GL_TEXTURE_RECTANGLE_ARB:
texture_binding = GL_TEXTURE_BINDING_RECTANGLE_ARB;
break;
default:
g_assert(!texture);
return FALSE;
}
ts->target = target;
if (!gl_get_param(texture_binding, &ts->old_texture))
return FALSE;
ts->was_bound = texture == ts->old_texture;
if (!ts->was_bound) {
gl_purge_errors();
glBindTexture(target, texture);
if (gl_check_error())
if (glIsEnabled(target)) {
binding = gl_get_texture_binding(target);
if (!binding)
return FALSE;
if (!gl_get_param(binding, &ts->old_texture))
return FALSE;
ts->was_enabled = TRUE;
ts->was_bound = texture == ts->old_texture;
if (ts->was_bound)
return TRUE;
}
else {
glEnable(target);
ts->old_texture = 0;
ts->was_enabled = FALSE;
ts->was_bound = FALSE;
}
gl_purge_errors();
glBindTexture(target, texture);
if (gl_check_error())
return FALSE;
return TRUE;
}