Patch adds required helper functions to shaderapi.h and
the actual implementation.
The added functionality can be tested by tests for following
functions that are refactored by later patches:
GetFragDataIndex
Signed-off-by: Tapani Pälli <tapani.pa...@intel.com>
---
src/mesa/main/program_resource.c | 25 ++++++++++++++++++++++++-
src/mesa/main/shader_query.cpp | 18 ++++++++++++++++++
src/mesa/main/shaderapi.h | 4 ++++
3 files changed, 46 insertions(+), 1 deletion(-)
diff --git a/src/mesa/main/program_resource.c b/src/mesa/main/program_resource.c
index 87a0144..ae987de 100644
--- a/src/mesa/main/program_resource.c
+++ b/src/mesa/main/program_resource.c
@@ -329,9 +329,32 @@ _mesa_GetProgramResourceLocation(GLuint program, GLenum
programInterface,
return _mesa_program_resource_location(shProg, programInterface, name);
}
+/**
+ * Returns output index for dual source blending.
+ */
GLint GLAPIENTRY
_mesa_GetProgramResourceLocationIndex(GLuint program, GLenum programInterface,
const GLchar *name)
{
- return -1;
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_shader_program *shProg =
+ lookup_linked_program(program, "glGetProgramResourceLocationIndex");
+
+ if (!shProg || invalid_array_element_syntax(name))
+ return -1;
+
+ /* From the GL_ARB_program_interface_query spec:
+ *
+ * "For GetProgramResourceLocationIndex, <programInterface> must be
+ * PROGRAM_OUTPUT."
+ */
+ if (programInterface != GL_PROGRAM_OUTPUT) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetProgramResourceLocationIndex (%s)",
+ _mesa_lookup_enum_by_nr(programInterface));
+ return -1;
+ }
+
+ return _mesa_program_resource_location_index(shProg, programInterface,
+ name);
}
diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp
index 4ae00a6..d3264db 100644
--- a/src/mesa/main/shader_query.cpp
+++ b/src/mesa/main/shader_query.cpp
@@ -807,3 +807,21 @@ _mesa_program_resource_location(struct gl_shader_program
*shProg,
return program_resource_location(shProg, res, name);
}
+
+/**
+ * Function implements following index queries:
+ * glGetFragDataIndex
+ */
+GLint
+_mesa_program_resource_location_index(struct gl_shader_program *shProg,
+ GLenum interface, const char *name)
+{
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_name(shProg, interface, name);
+
+ /* Non-existent (inactive) variable. */
+ if (!res)
+ return -1;
+
+ return RESOURCE_VAR(res)->data.index;
+}
diff --git a/src/mesa/main/shaderapi.h b/src/mesa/main/shaderapi.h
index 73ebf60..5046018 100644
--- a/src/mesa/main/shaderapi.h
+++ b/src/mesa/main/shaderapi.h
@@ -248,6 +248,10 @@ extern GLint
_mesa_program_resource_location(struct gl_shader_program *shProg,
GLenum interface, const char *name);
+extern GLint
+_mesa_program_resource_location_index(struct gl_shader_program *shProg,
+ GLenum interface, const char *name);
+
#ifdef __cplusplus
}
#endif
--
2.1.0
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