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      1 /*-------------------------------------------------------------------------
      2  * drawElements Quality Program OpenGL Utilities
      3  * ---------------------------------------------
      4  *
      5  * Copyright 2014 The Android Open Source Project
      6  *
      7  * Licensed under the Apache License, Version 2.0 (the "License");
      8  * you may not use this file except in compliance with the License.
      9  * You may obtain a copy of the License at
     10  *
     11  *      http://www.apache.org/licenses/LICENSE-2.0
     12  *
     13  * Unless required by applicable law or agreed to in writing, software
     14  * distributed under the License is distributed on an "AS IS" BASIS,
     15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16  * See the License for the specific language governing permissions and
     17  * limitations under the License.
     18  *
     19  *//*!
     20  * \file
     21  * \brief Program interface query utilities
     22  *//*--------------------------------------------------------------------*/
     23 
     24 #include "gluProgramInterfaceQuery.hpp"
     25 #include "glwFunctions.hpp"
     26 #include "glwEnums.hpp"
     27 
     28 #include <sstream>
     29 
     30 namespace glu
     31 {
     32 
     33 deUint32 getProgramResourceUint (const glw::Functions& gl, deUint32 program, deUint32 programInterface, deUint32 index, deUint32 queryParam)
     34 {
     35 	deUint32 value = 0;
     36 	gl.getProgramResourceiv(program, programInterface, index, 1, &queryParam, 1, DE_NULL, (int*)&value);
     37 	GLU_EXPECT_NO_ERROR(gl.getError(), "glGetProgramResourceiv()");
     38 	return value;
     39 }
     40 
     41 void getProgramResourceName (const glw::Functions& gl, deUint32 program, deUint32 programInterface, deUint32 index, std::string& dst)
     42 {
     43 	const int length = getProgramResourceInt(gl, program, programInterface, index, GL_NAME_LENGTH);
     44 
     45 	if (length > 0)
     46 	{
     47 		std::vector<char> buf(length+1);
     48 		gl.getProgramResourceName(program, programInterface, index, (int)buf.size(), DE_NULL, &buf[0]);
     49 		GLU_EXPECT_NO_ERROR(gl.getError(), "glGetProgramResourceName()");
     50 
     51 		dst = (const char*)&buf[0];
     52 	}
     53 	else
     54 	{
     55 		std::ostringstream msg;
     56 		msg << "Empty name returned for " << programInterface << " at index " << index;
     57 		throw tcu::TestError(msg.str());
     58 	}
     59 }
     60 
     61 static void getProgramInterfaceActiveVariables (const glw::Functions& gl, deUint32 program, deUint32 programInterface, deUint32 index, std::vector<int>& activeVariables)
     62 {
     63 	const int numActiveVariables = getProgramResourceInt(gl, program, programInterface, index, GL_NUM_ACTIVE_VARIABLES);
     64 
     65 	activeVariables.resize(numActiveVariables);
     66 	if (numActiveVariables > 0)
     67 	{
     68 		const deUint32 queryParam = GL_ACTIVE_VARIABLES;
     69 		gl.getProgramResourceiv(program, programInterface, index, 1, &queryParam, (int)activeVariables.size(), DE_NULL, &activeVariables[0]);
     70 		GLU_EXPECT_NO_ERROR(gl.getError(), "glGetProgramResourceiv(GL_PROGRAM_ACTIVE_VARIABLES)");
     71 	}
     72 }
     73 
     74 void getProgramInterfaceBlockInfo (const glw::Functions& gl, deUint32 program, deUint32 programInterface, deUint32 index, InterfaceBlockInfo& info)
     75 {
     76 	info.index			= index;
     77 	info.bufferBinding	= getProgramResourceUint(gl, program, programInterface, index, GL_BUFFER_BINDING);
     78 	info.dataSize		= getProgramResourceUint(gl, program, programInterface, index, GL_BUFFER_DATA_SIZE);
     79 
     80 	getProgramInterfaceActiveVariables(gl, program, programInterface, index, info.activeVariables);
     81 
     82 	if (programInterface != GL_ATOMIC_COUNTER_BUFFER)
     83 		getProgramResourceName(gl, program, programInterface, index, info.name);
     84 }
     85 
     86 void getProgramInterfaceVariableInfo (const glw::Functions& gl, deUint32 program, deUint32 programInterface, deUint32 index, InterfaceVariableInfo& info)
     87 {
     88 	// \todo [2013-08-27 pyry] Batch queries!
     89 	info.index			= index;
     90 	info.blockIndex		= getProgramResourceUint(gl, program, programInterface, index, GL_BLOCK_INDEX);
     91 	info.type			= getProgramResourceUint(gl, program, programInterface, index, GL_TYPE);
     92 	info.arraySize		= getProgramResourceUint(gl, program, programInterface, index, GL_ARRAY_SIZE);
     93 	info.offset			= getProgramResourceUint(gl, program, programInterface, index, GL_OFFSET);
     94 	info.arrayStride	= getProgramResourceUint(gl, program, programInterface, index, GL_ARRAY_STRIDE);
     95 	info.matrixStride	= getProgramResourceUint(gl, program, programInterface, index, GL_MATRIX_STRIDE);
     96 	info.isRowMajor		= getProgramResourceUint(gl, program, programInterface, index, GL_IS_ROW_MAJOR) != GL_FALSE;
     97 
     98 	if (programInterface == GL_UNIFORM)
     99 		info.atomicCounterBufferIndex = getProgramResourceUint(gl, program, programInterface, index, GL_ATOMIC_COUNTER_BUFFER_INDEX);
    100 
    101 	if (programInterface == GL_BUFFER_VARIABLE)
    102 	{
    103 		info.topLevelArraySize		= getProgramResourceUint(gl, program, programInterface, index, GL_TOP_LEVEL_ARRAY_SIZE);
    104 		info.topLevelArrayStride	= getProgramResourceUint(gl, program, programInterface, index, GL_TOP_LEVEL_ARRAY_STRIDE);
    105 	}
    106 
    107 	getProgramResourceName(gl, program, programInterface, index, info.name);
    108 }
    109 
    110 } // glu
    111