src/shaderprogram.cpp

   1 #include "shaderprogram.h"
   2
   3 using namespace IPDF;
   4
   5 ShaderProgram::~ShaderProgram()
   6 {
   7         for(auto shader : m_shaders)
   8         {
   9                 glDetachShader(m_program, shader.obj);
  10                 glDeleteShader(shader.obj);
  11         }
  12
  13         if (m_program)
  14                 glDeleteProgram(m_program);
  15 }
  16
  17 void ShaderProgram::LazyCreateProgram()
  18 {
  19         if (!m_program)
  20         {
  21                 m_program = glCreateProgram();
  22         }
  23 }
  24
  25 bool ShaderProgram::AttachShader(const char *src, GLenum type)
  26 {
  27         GLuint shader_obj = glCreateShader(type);
  28         glShaderSource(shader_obj, 1, &src, 0);
  29         glCompileShader(shader_obj);
  30
  31         m_shaders.push_back(Shader{type, shader_obj});
  32         LazyCreateProgram();
  33         glAttachShader(m_program, shader_obj);
  34         return true;
  35 }
  36
  37 bool ShaderProgram::AttachVertexProgram(const char *src)
  38 {
  39         return AttachShader(src, GL_VERTEX_SHADER);
  40 }
  41
  42 bool ShaderProgram::AttachFragmentProgram(const char *src)
  43 {
  44         return AttachShader(src, GL_FRAGMENT_SHADER);
  45 }
  46
  47 bool ShaderProgram::Link()
  48 {
  49         glLinkProgram(m_program);
  50         return true;
  51 }
  52
  53 const void ShaderProgram::Use() const
  54 {
  55         glUseProgram(m_program);
  56 }
  57
  58 const GLint ShaderProgram::GetUniformLocation(const char *name) const
  59 {
  60         return glGetUniformLocation(m_program, name);
  61 }