1 files changed, 122 insertions, 0 deletions
diff --git a/tests/glfw/mipmaps.c b/tests/glfw/mipmaps.c
new file mode 100644
index 00000000..59bbef2e
--- /dev/null
+++ b/tests/glfw/mipmaps.c
@@ -0,0 +1,122 @@
+//========================================================================
+// This is an example program for the GLFW library
+//
+// It shows texture loading with mipmap generation and rendering with
+// trilienar texture filtering
+//========================================================================
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <GL/glfw.h>
+
+int main( void )
+{
+    int width, height, x;
+    double time;
+    GLboolean running;
+    GLuint textureID;
+    char* texturePath = "mipmaps.tga";
+
+    // Initialise GLFW
+    if( !glfwInit() )
+    {
+        fprintf( stderr, "Failed to initialize GLFW\n" );
+        exit( EXIT_FAILURE );
+    }
+
+    // Open OpenGL window
+    if( !glfwOpenWindow( 640, 480, 0,0,0,0, 0,0, GLFW_WINDOW ) )
+    {
+        fprintf( stderr, "Failed to open GLFW window\n" );
+        glfwTerminate();
+        exit( EXIT_FAILURE );
+    }
+
+    glfwSetWindowTitle( "Trilinear interpolation" );
+
+    // Enable sticky keys
+    glfwEnable( GLFW_STICKY_KEYS );
+
+    // Enable vertical sync (on cards that support it)
+    glfwSwapInterval( 1 );
+
+    // Generate and bind our texture ID
+    glGenTextures( 1, &textureID );
+    glBindTexture( GL_TEXTURE_2D, textureID );
+
+    // Load texture from file into video memory, including mipmap levels
+    if( !glfwLoadTexture2D( texturePath, GLFW_BUILD_MIPMAPS_BIT ) )
+    {
+        fprintf( stderr, "Failed to load texture %s\n", texturePath );
+        glfwTerminate();
+        exit( EXIT_FAILURE );
+    }
+
+    // Use trilinear interpolation (GL_LINEAR_MIPMAP_LINEAR)
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                     GL_LINEAR_MIPMAP_LINEAR );
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+                     GL_LINEAR );
+
+    // Enable plain 2D texturing
+    glEnable( GL_TEXTURE_2D );
+
+    running = GL_TRUE;
+    while( running )
+    {
+        // Get time and mouse position
+        time = glfwGetTime();
+        glfwGetMousePos( &x, NULL );
+
+        // Get window size (may be different than the requested size)
+        glfwGetWindowSize( &width, &height );
+        height = height > 0 ? height : 1;
+
+        // Set viewport
+        glViewport( 0, 0, width, height );
+
+        // Clear color buffer
+        glClearColor( 0.0f, 0.0f, 0.0f, 0.0f);
+        glClear( GL_COLOR_BUFFER_BIT );
+
+        // Select and setup the projection matrix
+        glMatrixMode( GL_PROJECTION );
+        glLoadIdentity();
+        gluPerspective( 65.0f, (GLfloat)width / (GLfloat)height, 1.0f,
+            50.0f );
+
+        // Select and setup the modelview matrix
+        glMatrixMode( GL_MODELVIEW );
+        glLoadIdentity();
+        gluLookAt( 0.0f,  3.0f, -20.0f,    // Eye-position
+                   0.0f, -4.0f, -11.0f,    // View-point
+                   0.0f,  1.0f,   0.0f );  // Up-vector
+
+        // Draw a textured quad
+        glRotatef( 0.05f * (GLfloat)x + (GLfloat)time * 5.0f, 0.0f, 1.0f, 0.0f );
+        glBegin( GL_QUADS );
+          glTexCoord2f( -20.0f,  20.0f );
+          glVertex3f( -50.0f, 0.0f, -50.0f );
+          glTexCoord2f(  20.0f,  20.0f );
+          glVertex3f(  50.0f, 0.0f, -50.0f );
+          glTexCoord2f(  20.0f, -20.0f );
+          glVertex3f(  50.0f, 0.0f,  50.0f );
+          glTexCoord2f( -20.0f, -20.0f );
+          glVertex3f( -50.0f, 0.0f,  50.0f );
+        glEnd();
+
+        // Swap buffers
+        glfwSwapBuffers();
+
+        // Check if the ESC key was pressed or the window was closed
+        running = !glfwGetKey( GLFW_KEY_ESC ) &&
+                  glfwGetWindowParam( GLFW_OPENED );
+    }
+
+    // Close OpenGL window and terminate GLFW
+    glfwTerminate();
+
+    exit( EXIT_SUCCESS );
+}
+