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 <stdexcept>

    20 

    21 #include "Shader.h"

    22 

    23 class Shader::Impl {

    24 public:

    25 	Shader::Type type;

    26 	GLuint id;

    27 	std::string fileName;

    28 };

    29 

    30 Shader::Shader(

    31 		const Type type,

    32 		const Buffer& source,

    33 		const std::string& fileName) : impl(new Impl()) {

    34 	impl->type = type;

    35 	impl->fileName = fileName;

    36 	impl->id = glCreateShader((GLenum) impl->type);

    37 	update(source);

    38 }

    39 

    40 Shader::~Shader() {

    41 	glDeleteShader(impl->id);

    42 	delete impl;

    43 }

    44 

    45 GLuint Shader::getId() const {

    46 	return impl->id;

    47 }

    48 

    49 const std::string Shader::getFileName() const {

    50 	return impl->fileName;

    51 }

    52 

    53 void Shader::update(const Buffer& source) {

    54 	auto fileData = source.getData();

    55 	GLint fileSize = source.getSize();

    56 	glShaderSource(impl->id, 1, &fileData, &fileSize);

    57 	glCompileShader(impl->id);

    58 

    59 	GLint compileStatus;

    60 	glGetShaderiv(impl->id, GL_COMPILE_STATUS, &compileStatus);

    61 

    62 	if (compileStatus != GL_TRUE) {

    63 		char error[512];

    64 		glGetShaderInfoLog(impl->id, sizeof (error), NULL, error);

    65 		throw std::logic_error(

    66 				std::string("GLSL: shader failed to compile: ") + error);

    67 	}

    68 }