Init

.gitignore

@@ -0,0 +1,2 @@
+*.o
+run

Makefile

@@ -0,0 +1,13 @@
+CC=gcc
+OUT=run
+
+all: lodepng.o
+	$(CC) -O2 -o $(OUT) \
+	lodepng.o \
+	main.c -lglfw -lGL -lGLU
+
+lodepng.o:
+	$(CC) -c ./deps/lodepng/lodepng.c
+
+clean:
+	rm -f *.o $(OUT)

README.md

@@ -0,0 +1 @@
+# Nil

file_texture.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if [ ! -f run ]; then
+  echo 'File not found. Make please!'
+else
+  ./run textures/green.png
+fi

main.c

@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <GLFW/glfw3.h>
+
+#include "deps/lodepng/lodepng.h"
+
+void keyboard_callback(GLFWwindow *window, int key, int scancode,
+  int action, int mods);
+
+int main(int argc, char const *argv[])
+{
+  GLFWwindow *window;
+
+  if (!glfwInit())
+    return -1;
+
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 1);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4);
+  glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+  window = glfwCreateWindow(400, 400, "Example Lodepng", NULL, NULL);
+  
+  if (!window)
+  {
+    glfwTerminate();
+    return -1;
+  }
+
+  glfwMakeContextCurrent(window);
+  glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
+
+  GLuint texture;
+  glGenTextures(1, &texture);
+  glBindTexture(GL_TEXTURE_2D, texture);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+  unsigned int error;
+  unsigned char *image;
+  unsigned int width, height;
+
+  const char *filename = argc > 1 ? argv[1] : "textures/Nav.png";
+
+  error = lodepng_decode32_file(&image, &width, &height, filename);
+  if (error)
+    printf("Error %u: %s\n", error, lodepng_error_text(error));
+  
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+    GL_RGBA, GL_UNSIGNED_BYTE, image);
+  free(image);
+
+  while (!glfwWindowShouldClose(window))
+  {
+    glfwSetKeyCallback(window, keyboard_callback);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho(0, 400, 400, 0, -1, 1);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+
+    glClearColor(1, 1, 1, 0);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glEnable(GL_TEXTURE_2D);
+    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+    
+    glColor3ub(255, 235, 115);
+    glBegin(GL_QUADS);
+      glTexCoord2f(0, 0); glVertex2f(50,  50);
+      glTexCoord2f(1, 0); glVertex2f(350,  50);
+      glTexCoord2f(1, 1); glVertex2f(350, 350);
+      glTexCoord2f(0, 1); glVertex2f(50, 350);
+    glEnd();
+    glDisable(GL_TEXTURE_2D);
+
+    glfwSwapBuffers(window);
+    glfwPollEvents();
+  }
+
+  glfwTerminate();
+  return 0;
+}
+
+void keyboard_callback(GLFWwindow* window, int key, int scancode,
+  int action, int mods)
+{
+  if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+    glfwSetWindowShouldClose(window, GL_TRUE);
+}