diff options
| -rw-r--r-- | src/mesa/main/program_resource.c | 81 | ||||
| -rw-r--r-- | src/mesa/main/shader_query.cpp | 67 | ||||
| -rw-r--r-- | src/mesa/main/shaderapi.h | 4 |
3 files changed, 151 insertions, 1 deletions
diff --git a/src/mesa/main/program_resource.c b/src/mesa/main/program_resource.c index a60b2e4e658..ee39f3125cf 100644 --- a/src/mesa/main/program_resource.c +++ b/src/mesa/main/program_resource.c @@ -278,11 +278,90 @@ _mesa_GetProgramResourceiv(GLuint program, GLenum programInterface, { } +/** + * Function verifies syntax of given name for GetProgramResourceLocation + * and GetProgramResourceLocationIndex for the following cases: + * + * "array element portion of a string passed to GetProgramResourceLocation + * or GetProgramResourceLocationIndex must not have, a "+" sign, extra + * leading zeroes, or whitespace". + * + * Check is written to be compatible with GL_ARB_array_of_arrays. + */ +static bool +invalid_array_element_syntax(const GLchar *name) +{ + char *first = strchr(name, '['); + char *last = strrchr(name, '['); + + if (!first) + return false; + + /* No '+' or ' ' allowed anywhere. */ + if (strchr(first, '+') || strchr(first, ' ')) + return true; + + /* Check that last array index is 0. */ + if (last[1] == '0' && last[2] != ']') + return true; + + return false; +} + +static struct gl_shader_program * +lookup_linked_program(GLuint program, const char *caller) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_shader_program *prog = + _mesa_lookup_shader_program_err(ctx, program, caller); + + if (!prog) + return NULL; + + if (prog->LinkStatus == GL_FALSE) { + _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)", + caller); + return NULL; + } + return prog; +} + GLint GLAPIENTRY _mesa_GetProgramResourceLocation(GLuint program, GLenum programInterface, const GLchar *name) { - return -1; + GET_CURRENT_CONTEXT(ctx); + struct gl_shader_program *shProg = + lookup_linked_program(program, "glGetProgramResourceLocation"); + + if (!shProg || !name || invalid_array_element_syntax(name)) + return -1; + + /* Validate programInterface. */ + switch (programInterface) { + case GL_UNIFORM: + case GL_PROGRAM_INPUT: + case GL_PROGRAM_OUTPUT: + break; + + /* For reference valid cases requiring additional extension support: + * GL_ARB_shader_subroutine + * GL_ARB_tessellation_shader + * GL_ARB_compute_shader + */ + case GL_VERTEX_SUBROUTINE_UNIFORM: + case GL_TESS_CONTROL_SUBROUTINE_UNIFORM: + case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM: + case GL_GEOMETRY_SUBROUTINE_UNIFORM: + case GL_FRAGMENT_SUBROUTINE_UNIFORM: + case GL_COMPUTE_SUBROUTINE_UNIFORM: + + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceLocation(%s %s)", + _mesa_lookup_enum_by_nr(programInterface), name); + } + + return _mesa_program_resource_location(shProg, programInterface, name); } GLint GLAPIENTRY diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp index ab61be97a09..f50ceb6a56b 100644 --- a/src/mesa/main/shader_query.cpp +++ b/src/mesa/main/shader_query.cpp @@ -754,3 +754,70 @@ _mesa_get_program_resource_name(struct gl_shader_program *shProg, } return true; } + +static GLint +program_resource_location(struct gl_shader_program *shProg, + struct gl_program_resource *res, const char *name) +{ + unsigned index, offset; + int array_index = -1; + + if (res->Type == GL_PROGRAM_INPUT || res->Type == GL_PROGRAM_OUTPUT) { + array_index = array_index_of_resource(res, name); + if (array_index < 0) + return -1; + } + + /* VERT_ATTRIB_GENERIC0 and FRAG_RESULT_DATA0 are decremented as these + * offsets are used internally to differentiate between built-in attributes + * and user-defined attributes. + */ + switch (res->Type) { + case GL_PROGRAM_INPUT: + return RESOURCE_VAR(res)->data.location + array_index - VERT_ATTRIB_GENERIC0; + case GL_PROGRAM_OUTPUT: + return RESOURCE_VAR(res)->data.location + array_index - FRAG_RESULT_DATA0; + case GL_UNIFORM: + index = _mesa_get_uniform_location(shProg, name, &offset); + + if (index == GL_INVALID_INDEX) + return -1; + + /* From the GL_ARB_uniform_buffer_object spec: + * + * "The value -1 will be returned if <name> does not correspond to an + * active uniform variable name in <program>, if <name> is associated + * with a named uniform block, or if <name> starts with the reserved + * prefix "gl_"." + */ + if (RESOURCE_UNI(res)->block_index != -1 || + RESOURCE_UNI(res)->atomic_buffer_index != -1) + return -1; + + /* location in remap table + array element offset */ + return RESOURCE_UNI(res)->remap_location + offset; + + default: + return -1; + } +} + +/** + * Function implements following location queries: + * glGetAttribLocation + * glGetFragDataLocation + * glGetUniformLocation + */ +GLint +_mesa_program_resource_location(struct gl_shader_program *shProg, + GLenum interface, const char *name) +{ + struct gl_program_resource *res = + _mesa_program_resource_find_name(shProg, interface, name); + + /* Resource not found. */ + if (!res) + return -1; + + return program_resource_location(shProg, res, name); +} diff --git a/src/mesa/main/shaderapi.h b/src/mesa/main/shaderapi.h index 7a7e3e9e731..73ebf601107 100644 --- a/src/mesa/main/shaderapi.h +++ b/src/mesa/main/shaderapi.h @@ -244,6 +244,10 @@ _mesa_get_program_resource_name(struct gl_shader_program *shProg, GLsizei bufSize, GLsizei *length, GLchar *name, const char *caller); +extern GLint +_mesa_program_resource_location(struct gl_shader_program *shProg, + GLenum interface, const char *name); + #ifdef __cplusplus } #endif |