From 267bebfc227c94f543a39e2aa75fb101bc06932e Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Fri, 21 May 2010 19:24:51 +0200
Subject: Moved engine-sources to seperate subdirectory.

---
 engine/shader.cpp | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 engine/shader.cpp

(limited to 'engine/shader.cpp')

diff --git a/engine/shader.cpp b/engine/shader.cpp
new file mode 100644
index 0000000..04aa031
--- /dev/null
+++ b/engine/shader.cpp
@@ -0,0 +1,91 @@
+#include <fstream>
+#include "shader.h"
+
+bool GLBaseShader::shader_source(const char *filename) {
+	std::ifstream inf(filename, std::ios_base::in);
+	if(!inf.is_open()) {
+		std::cerr << "Failed to load shader " << filename << std::endl;
+		return false;
+	}
+	inf.seekg(0, std::ios_base::end);
+	int length = inf.tellg();
+	inf.seekg(0, std::ios_base::beg);
+	char *buffer = new char[length];
+	inf.read(buffer, length);
+	inf.close();
+
+	glShaderSource(shader, 1, (const GLchar**)&buffer, &length);
+	print_check_ogl_error();
+	delete[] buffer;
+	glCompileShader(shader);
+	print_check_ogl_error();
+	int p;
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &p);
+	if(p == 0) {
+		std::cerr << "Failed to compile shader:" << std::endl;
+		char log[0xffff];
+		int size;
+		glGetShaderInfoLog(shader, 0xffff, &size, (GLchar*)&log);
+		std::cerr << log << std::endl;
+	}
+	return shader;
+}
+
+bool GLBaseShader::shader_source(std::string& filename) {
+	return shader_source(filename.c_str());
+}
+
+GLBaseShader::GLBaseShader(GLenum type) {
+	shader = glCreateShader(type);
+}
+
+GLShaderProgram::GLShaderProgram() {
+	program = glCreateProgram();
+}
+
+bool GLShaderProgram::attach(GLBaseShader& shader) {
+	glAttachShader(program, shader.shader);
+	return !print_check_ogl_error();
+}
+
+bool GLShaderProgram::detach(GLBaseShader& shader) {
+	glDetachShader(program, shader.shader);
+	return !print_check_ogl_error();
+}
+
+bool GLShaderProgram::link() {
+	glLinkProgram(program);
+	bool error = print_check_ogl_error();
+	int p;
+	glGetProgramiv(program, GL_LINK_STATUS, &p);
+	if(p == 0) {
+		std::cerr << "Failed to link program:" << std::endl;
+		char log[0xffff];
+		int size;
+		glGetProgramInfoLog(program, 0xffff, &size, (GLchar*)&log);
+		printf(log);
+	}
+	return !error && p;
+}
+
+bool GLShaderProgram::use() {
+	if(!glIsProgram(program)) program = glCreateProgram();
+	glUseProgram(program);
+	return !print_check_ogl_error();
+}
+
+void GLShaderProgram::remove() {
+	glDeleteProgram(program);
+}
+
+void print_ogl_error(GLenum error) {
+	unsigned char *buf = (unsigned char*)gluErrorString(error);
+	std::cerr << "OpenGL: " << buf << std::endl;
+}
+
+bool print_check_ogl_error() {
+	GLenum error = glGetError();
+	if(error != GL_NO_ERROR)
+		print_ogl_error(error);
+	return error != GL_NO_ERROR;
+}
-- 
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