diff options
Diffstat (limited to 'src/shader/util.cc')
-rw-r--r-- | src/shader/util.cc | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/shader/util.cc b/src/shader/util.cc new file mode 100644 index 0000000..be59ac1 --- /dev/null +++ b/src/shader/util.cc @@ -0,0 +1,56 @@ +#include "util.h" + +#include <iostream> +#include <vector> + +namespace util { + +GLint getUniform(GLuint program, const std::string& name) { + const GLint uniform = glGetUniformLocation(program, name.c_str()); + + if ( uniform == -1 ) { + std::cerr << "Could not bind uniform " << name << std::endl; + return -1; + } + + return uniform; +} + +GLint compileShader(const std::string& source, GLenum type) { + GLint shader = glCreateShader(type); + + if ( !shader ) { + std::cerr << "Cannot create a shader of type " << type << std::endl; + return -1; + } + + const char* source_data = source.c_str(); + const int source_length = source.size(); + + glShaderSource(shader, 1, &source_data, &source_length); + glCompileShader(shader); + + GLint compiled; + glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled); + + if ( !compiled ) { + std::cerr << "Cannot compile shader" << std::endl; + + GLint maxLength = 0; + glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength); + + std::vector<GLchar> errorLog(maxLength); + glGetShaderInfoLog(shader, maxLength, &maxLength, &errorLog[0]); + + for( auto c : errorLog ) { + std::cerr << c; + } + std::cerr << std::endl; + + return -1; + } + + return shader; +} + +} |