125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/*
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Copyright 2016-2021 Arisotura
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#include "OpenGLSupport.h"
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namespace OpenGL
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{
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bool BuildShaderProgram(const char* vs, const char* fs, GLuint* ids, const char* name)
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{
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int len;
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int res;
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ids[0] = glCreateShader(GL_VERTEX_SHADER);
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len = strlen(vs);
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glShaderSource(ids[0], 1, &vs, &len);
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glCompileShader(ids[0]);
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glGetShaderiv(ids[0], GL_COMPILE_STATUS, &res);
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if (res != GL_TRUE)
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{
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glGetShaderiv(ids[0], GL_INFO_LOG_LENGTH, &res);
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if (res < 1) res = 1024;
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char* log = new char[res+1];
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glGetShaderInfoLog(ids[0], res+1, NULL, log);
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printf("OpenGL: failed to compile vertex shader %s: %s\n", name, log);
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printf("shader source:\n--\n%s\n--\n", vs);
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delete[] log;
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glDeleteShader(ids[0]);
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return false;
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}
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ids[1] = glCreateShader(GL_FRAGMENT_SHADER);
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len = strlen(fs);
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glShaderSource(ids[1], 1, &fs, &len);
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glCompileShader(ids[1]);
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glGetShaderiv(ids[1], GL_COMPILE_STATUS, &res);
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if (res != GL_TRUE)
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{
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glGetShaderiv(ids[1], GL_INFO_LOG_LENGTH, &res);
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if (res < 1) res = 1024;
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char* log = new char[res+1];
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glGetShaderInfoLog(ids[1], res+1, NULL, log);
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printf("OpenGL: failed to compile fragment shader %s: %s\n", name, log);
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//printf("shader source:\n--\n%s\n--\n", fs);
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delete[] log;
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FILE* logf = fopen("shaderfail.log", "w");
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fwrite(fs, len+1, 1, logf);
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fclose(logf);
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glDeleteShader(ids[0]);
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glDeleteShader(ids[1]);
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return false;
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}
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ids[2] = glCreateProgram();
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glAttachShader(ids[2], ids[0]);
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glAttachShader(ids[2], ids[1]);
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return true;
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}
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bool LinkShaderProgram(GLuint* ids)
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{
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int res;
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glLinkProgram(ids[2]);
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glDetachShader(ids[2], ids[0]);
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glDetachShader(ids[2], ids[1]);
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glDeleteShader(ids[0]);
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glDeleteShader(ids[1]);
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glGetProgramiv(ids[2], GL_LINK_STATUS, &res);
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if (res != GL_TRUE)
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{
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glGetProgramiv(ids[2], GL_INFO_LOG_LENGTH, &res);
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if (res < 1) res = 1024;
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char* log = new char[res+1];
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glGetProgramInfoLog(ids[2], res+1, NULL, log);
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printf("OpenGL: failed to link shader program: %s\n", log);
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delete[] log;
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glDeleteProgram(ids[2]);
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return false;
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}
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return true;
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}
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void DeleteShaderProgram(GLuint* ids)
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{
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glDeleteProgram(ids[2]);
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}
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void UseShaderProgram(GLuint* ids)
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{
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glUseProgram(ids[2]);
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}
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}
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