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/*
* Mesa 3-D graphics library
*
* Copyright (C) 2004-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009-2010 VMware, Inc. All Rights Reserved.
* Copyright © 2010, 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "main/core.h"
#include "ir.h"
#include "../glsl/program.h"
extern "C" {
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "uniforms.h"
}
extern "C" void GLAPIENTRY
_mesa_GetActiveUniformARB(GLhandleARB program, GLuint index,
GLsizei maxLength, GLsizei *length, GLint *size,
GLenum *type, GLcharARB *nameOut)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_shader_program *shProg =
_mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform");
const struct gl_program_parameter *param;
if (!shProg)
return;
if (!shProg->Uniforms || index >= shProg->Uniforms->NumUniforms) {
_mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniform(index)");
return;
}
param = get_uniform_parameter(shProg, index);
if (!param)
return;
if (nameOut) {
_mesa_copy_string(nameOut, maxLength, length, param->Name);
}
if (size) {
GLint typeSize = _mesa_sizeof_glsl_type(param->DataType);
if ((GLint) param->Size > typeSize) {
/* This is an array.
* Array elements are placed on vector[4] boundaries so they're
* a multiple of four floats. We round typeSize up to next multiple
* of four to get the right size below.
*/
typeSize = (typeSize + 3) & ~3;
}
/* Note that the returned size is in units of the <type>, not bytes */
*size = param->Size / typeSize;
}
if (type) {
*type = param->DataType;
}
}
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