diff options
Diffstat (limited to 'mesalib/src/mesa/main/shader_query.cpp')
| -rw-r--r-- | mesalib/src/mesa/main/shader_query.cpp | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/mesalib/src/mesa/main/shader_query.cpp b/mesalib/src/mesa/main/shader_query.cpp index e1afe5315..f66c11733 100644 --- a/mesalib/src/mesa/main/shader_query.cpp +++ b/mesalib/src/mesa/main/shader_query.cpp @@ -76,6 +76,30 @@ _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; + + case ir_var_system_value: + /* From GL 4.3 core spec, section 11.1.1 (Vertex Attributes): + * "For GetActiveAttrib, all active vertex shader input variables + * are enumerated, including the special built-in inputs gl_VertexID + * and gl_InstanceID." + */ + return !strcmp(var->name, "gl_VertexID") || + !strcmp(var->name, "gl_InstanceID"); + + default: + return false; + } +} + void GLAPIENTRY _mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index, GLsizei maxLength, GLsizei * length, GLint * size, @@ -105,10 +129,8 @@ _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 +218,8 @@ _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++; } |