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mesa: Extract is_active_attrib() in shaderapi

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The rules are about to get a bit more complex to account for
gl_InstanceID and gl_VertexID, which are system values.

Extracting this first avoids introducing duplication.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes 2014-04-12 21:20:42 +12:00
parent aeb03f8aea
commit ca5c8d6cd4
1 changed files with 19 additions and 8 deletions
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27
src/mesa/main/shader_query.cpp
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@ -76,6 +76,21 @@ _mesa_BindAttribLocation(GLhandleARB program, GLuint index,
*/
}
static bool
is_active_attrib(const ir_variable *var)
{
if (!var)
return false;
switch (var->data.mode) {
case ir_var_shader_in:
return var->data.location != -1;
default:
return false;
}
}
void GLAPIENTRY
_mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index,
GLsizei maxLength, GLsizei * length, GLint * size,
@ -105,10 +120,8 @@ _mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index,
foreach_list(node, ir) {
const ir_variable *const var = ((ir_instruction *) node)->as_variable();
if (var == NULL
|| var->data.mode != ir_var_shader_in
|| var->data.location == -1)
continue;
if (!is_active_attrib(var))
continue;
if (current_index == desired_index) {
_mesa_copy_string(name, maxLength, length, var->name);
@ -196,10 +209,8 @@ _mesa_count_active_attribs(struct gl_shader_program *shProg)
foreach_list(node, ir) {
const ir_variable *const var = ((ir_instruction *) node)->as_variable();
if (var == NULL
|| var->data.mode != ir_var_shader_in
|| var->data.location == -1)
continue;
if (!is_active_attrib(var))
continue;
i++;
}