GLFW working

opengl-test-two/main.cpp

@@ -0,0 +1,116 @@
+#include <GLFW/glfw3.h>
+#include <stdio.h>
+
+GLuint loadBMP_custom(const char * imagepath);
+
+int main(void)
+{
+    GLFWwindow* window;
+
+    /* Initialize the library */
+    if (!glfwInit())
+        return -1;
+
+    /* Create a windowed mode window and its OpenGL context */
+    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        return -1;
+    }
+
+    /* Make the window's context current */
+    glfwMakeContextCurrent(window);
+
+    // INIT
+
+    GLuint image = loadBMP_custom("../img/tests/stones.bmp");
+
+
+
+
+
+    // INIT END
+
+    /* Loop until the user closes the window */
+    while (!glfwWindowShouldClose(window))
+    {
+        /* Render here */
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        // RENDER
+
+
+
+
+
+        // RENDER END
+
+        /* Swap front and back buffers */
+        glfwSwapBuffers(window);
+
+        /* Poll for and process events */
+        glfwPollEvents();
+    }
+
+    glfwTerminate();
+    return 0;
+}
+
+GLuint loadBMP_custom(const char * imagepath) {
+    // Data read from the header of the BMP file
+    unsigned char header[54]; // Each BMP file begins by a 54-bytes header
+    unsigned int dataPos;     // Position in the file where the actual data begins
+    unsigned int width, height;
+    unsigned int imageSize;   // = width*height*3
+    // Actual RGB data
+    unsigned char * data;
+
+    // Open the file
+    FILE * file = fopen(imagepath,"rb");
+    if (!file){printf("Image could not be opened\n"); return 0;}
+
+    if ( fread(header, 1, 54, file)!=54 ){ // If not 54 bytes read : problem
+        printf("Not a correct BMP file\n");
+        return false;
+    }
+
+    if ( header[0]!='B' || header[1]!='M' ){
+        printf("Not a correct BMP file\n");
+        return 0;
+    }
+
+    // Read ints from the byte array
+    dataPos    = *(int*)&(header[0x0A]);
+    imageSize  = *(int*)&(header[0x22]);
+    width      = *(int*)&(header[0x12]);
+    height     = *(int*)&(header[0x16]);
+
+    // Some BMP files are misformatted, guess missing information
+    if (imageSize==0)    imageSize=width*height*3; // 3 : one byte for each Red, Green and Blue component
+    if (dataPos==0)      dataPos=54; // The BMP header is done that way
+
+    // Create a buffer
+    data = new unsigned char [imageSize];
+
+    // Read the actual data from the file into the buffer
+    fread(data,1,imageSize,file);
+
+    //Everything is in memory now, the file can be closed
+    fclose(file);
+
+    // Create one OpenGL texture
+    GLuint textureID;
+    glGenTextures(1, &textureID);
+
+    // "Bind" the newly created texture : all future texture functions will modify this texture
+    glBindTexture(GL_TEXTURE_2D, textureID);
+
+    // Give the image to OpenGL
+    glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, width, height, 0, GL_BGR_EXT, GL_UNSIGNED_BYTE, data);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+
+}