1 /**

     2  * ShaderShark

     3  * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 

    18 #include <string>

    19 #include <exception>

    20 

    21 #include "Program.h"

    22 

    23 class Program::Impl {

    24 public:

    25 	GLuint id;

    26 };

    27 

    28 Program::Program() : impl(new Impl()) {

    29 	impl->id = glCreateProgram();

    30 }

    31 

    32 Program::~Program() {

    33 	glDeleteProgram(impl->id);

    34 	delete impl;

    35 }

    36 

    37 void Program::attachShader(const Shader& shader) {

    38 	glAttachShader(impl->id, shader.getId());

    39 }

    40 

    41 void Program::detachShader(const Shader& shader) {

    42 	glDetachShader(impl->id, shader.getId());

    43 }

    44 

    45 void Program::link() {

    46 	glLinkProgram(impl->id);

    47 	GLint linkStatus;

    48 	glGetProgramiv(impl->id, GL_LINK_STATUS, &linkStatus);

    49 	if (linkStatus != GL_TRUE) {

    50 		char error[512];

    51 		glGetProgramInfoLog(impl->id, sizeof (error), NULL, error);

    52 		throw std::logic_error(

    53 				std::string("GLSL: program failed to link: ") + error);

    54 	}

    55 }

    56 

    57 void Program::use() {

    58 	glUseProgram(impl->id);

    59 	checkError();

    60 }

    61 

    62 GLint Program::getAttribLocation(const std::string& name) {

    63 	return glGetAttribLocation(impl->id, name.c_str());

    64 }

    65 

    66 GLint Program::getUniformLocation(const std::string& name) {

    67 	return glGetUniformLocation(impl->id, name.c_str());

    68 }

    69 

    70 GLint Program::getFragDataLocation(const std::string& name) {

    71 	return glGetFragDataLocation(impl->id, name.c_str());

    72 }

    73 

    74 void Program::bindFragDataLocation(const std::string& name, const GLint color) {

    75 	glBindFragDataLocation(impl->id, color, name.c_str());

    76 }