Introduce basic shader, texture buffer abstraction

1 files changed, 44 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..ce8d012
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,44 @@
+#pragma once
+
+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 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;
+		exit(-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 shader;
+}
+
+}