OpenGL-Shader封装

#include "Standard.hpp" #include "../ThirdPartyLibrary/glew-1.13.0/include/GL/glew.h" #include "../ThirdPartyLibrary/glew-1.13.0/include/GL/wglew.h" #pragma comment(lib, "../ThirdPartyLibrary/glew-1.13.0/lib/Release/Win32/glew32.lib" ) #include "Shader.h" Shader::Shader() : m_ProgramID(0), m_VertexShader(0), m_FragmentShader(0) { const char* vssc = VertexShaderCode .data(); const char* fssc = FragmentShaderCode.data(); m_VertexShader = glCreateShader(GL_VERTEX_SHADER); glShaderSource(m_VertexShader, 1, &vssc, NULL); glCompileShader(m_VertexShader); { GLint errorInfo; glGetShaderiv(m_VertexShader, GL_COMPILE_STATUS, &errorInfo); if (errorInfo == 0) { glDeleteShader(m_VertexShader); m_VertexShader = 0; return; } } m_FragmentShader = glCreateShader(GL_FRAGMENT_SHADER); glShaderSource(m_FragmentShader, 1, &fssc, NULL); glCompileShader(m_FragmentShader); { GLint errorInfo; glGetShaderiv(m_FragmentShader, GL_COMPILE_STATUS, &errorInfo); if (errorInfo == 0) { glDeleteShader(m_FragmentShader); m_FragmentShader = 0; return; } } m_ProgramID = glCreateProgram(); glAttachShader(m_ProgramID, m_VertexShader); glAttachShader(m_ProgramID, m_FragmentShader); glLinkProgram(m_ProgramID); { GLint errorInfo; glGetProgramiv(m_ProgramID, GL_LINK_STATUS, &errorInfo); if (errorInfo == 0) { glDeleteProgram(m_ProgramID); m_ProgramID = 0; return; } } m_ProjectionMatrixLocation = glGetUniformLocation(m_ProgramID, "LProjectionMatrix" ); m_ModelViewMatrixLocation = glGetUniformLocation(m_ProgramID, "LModelViewMatrix" ); m_VertexPos3DLocation = glGetAttribLocation (m_ProgramID, "LVertexPos3D" ); m_MultiColorLocation = glGetAttribLocation (m_ProgramID, "LMultiColorLocation"); m_TexCoordLocation = glGetAttribLocation (m_ProgramID, "LTexCoord" ); m_IsModulateModeLocation = glGetUniformLocation(m_ProgramID, "LIsModulateMode" ); m_TextureUnitLocation = glGetUniformLocation(m_ProgramID, "LTextureUnit" ); glDeleteShader(m_VertexShader ); glDeleteShader(m_FragmentShader); } const string Shader::VertexShaderCode ( "uniform mat4 LProjectionMatrix;" "uniform mat4 LModelViewMatrix;" "attribute vec3 LVertexPos3D;" "attribute vec4 LMultiColor;" "attribute vec2 LTexCoord;" "varying vec4 multiColor;" "varying vec2 texCoord;" "void main() {" " multiColor = LMultiColor;" " texCoord = LTexCoord;" " gl_Position = LProjectionMatrix * LModelViewMatrix * vec4(LVertexPos3D.x, LVertexPos3D.y, LVertexPos3D.z, 1.0);" "}" ); const string Shader::FragmentShaderCode ( "precision highp float;" "uniform int LIsModulateMode;" "uniform sampler2D LTextureUnit;" "varying vec4 multiColor;" "varying vec2 texCoord;" "void main() {" " gl_FragColor = texture2D(LTextureUnit, texCoord);" "}" );