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/*
* Copyright 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include "shader.h"
#include "JNIHelper.h"
namespace ndk_helper
{
#define DEBUG (1)
bool shader::CompileShader( GLuint *shader,
const GLenum type,
const char *str_file_name,
const std::map<std::string, std::string>& map_parameters )
{
std::vector<uint8_t> data;
if( !JNIHelper::GetInstance()->ReadFile( str_file_name, &data ) )
{
LOGI( "Can not open a file:%s", str_file_name );
return false;
}
const char REPLACEMENT_TAG = '*';
//Fill-in parameters
std::string str( data.begin(), data.end() );
std::string str_replacement_map( data.size(), ' ' );
std::map<std::string, std::string>::const_iterator it = map_parameters.begin();
std::map<std::string, std::string>::const_iterator itEnd = map_parameters.end();
while( it != itEnd )
{
size_t pos = 0;
while( (pos = str.find( it->first, pos )) != std::string::npos )
{
//Check if the sub string is already touched
size_t replaced_pos = str_replacement_map.find( REPLACEMENT_TAG, pos );
if( replaced_pos == std::string::npos || replaced_pos > pos )
{
str.replace( pos, it->first.length(), it->second );
str_replacement_map.replace( pos, it->first.length(), it->first.length(),
REPLACEMENT_TAG );
pos += it->second.length();
}
else
{
//The replacement target has been touched by other tag, skipping them
pos += it->second.length();
}
}
it++;
}
LOGI( "Patched Shdader:\n%s", str.c_str() );
std::vector<uint8_t> v( str.begin(), str.end() );
str.clear();
return shader::CompileShader( shader, type, v );
}
bool shader::CompileShader( GLuint *shader,
const GLenum type,
const GLchar *source,
const int32_t iSize )
{
if( source == NULL || iSize <= 0 )
return false;
*shader = glCreateShader( type );
glShaderSource( *shader, 1, &source, &iSize ); //Not specifying 3rd parameter (size) could be troublesome..
glCompileShader( *shader );
#if defined(DEBUG)
GLint logLength;
glGetShaderiv( *shader, GL_INFO_LOG_LENGTH, &logLength );
if( logLength > 0 )
{
GLchar *log = (GLchar *) malloc( logLength );
glGetShaderInfoLog( *shader, logLength, &logLength, log );
LOGI( "Shader compile log:\n%s", log );
free( log );
}
#endif
GLint status;
glGetShaderiv( *shader, GL_COMPILE_STATUS, &status );
if( status == 0 )
{
glDeleteShader( *shader );
return false;
}
return true;
}
bool shader::CompileShader( GLuint *shader,
const GLenum type,
std::vector<uint8_t>& data )
{
if( !data.size() )
return false;
const GLchar *source = (GLchar *) &data[0];
int32_t iSize = data.size();
return shader::CompileShader( shader, type, source, iSize );
}
bool shader::CompileShader( GLuint *shader,
const GLenum type,
const char *strFileName )
{
std::vector<uint8_t> data;
bool b = JNIHelper::GetInstance()->ReadFile( strFileName, &data );
if( !b )
{
LOGI( "Can not open a file:%s", strFileName );
return false;
}
return shader::CompileShader( shader, type, data );
}
bool shader::LinkProgram( const GLuint prog )
{
GLint status;
glLinkProgram( prog );
#if defined(DEBUG)
GLint logLength;
glGetProgramiv( prog, GL_INFO_LOG_LENGTH, &logLength );
if( logLength > 0 )
{
GLchar *log = (GLchar *) malloc( logLength );
glGetProgramInfoLog( prog, logLength, &logLength, log );
LOGI( "Program link log:\n%s", log );
free( log );
}
#endif
glGetProgramiv( prog, GL_LINK_STATUS, &status );
if( status == 0 )
{
LOGI( "Program link failed\n" );
return false;
}
return true;
}
bool shader::ValidateProgram( const GLuint prog )
{
GLint logLength, status;
glValidateProgram( prog );
glGetProgramiv( prog, GL_INFO_LOG_LENGTH, &logLength );
if( logLength > 0 )
{
GLchar *log = (GLchar *) malloc( logLength );
glGetProgramInfoLog( prog, logLength, &logLength, log );
LOGI( "Program validate log:\n%s", log );
free( log );
}
glGetProgramiv( prog, GL_VALIDATE_STATUS, &status );
if( status == 0 )
return false;
return true;
}
} //namespace ndkHelper
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