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1 files changed, 237 insertions, 0 deletions

diff --git a/html/examples/iupglview.c b/html/examples/iupglview.c
new file mode 100644
index 0000000..93e0054
--- /dev/null
+++ b/html/examples/iupglview.c
@@ -0,0 +1,237 @@
+
+#ifdef WIN32            
+#include <windows.h>    /* necessary because of the Microsoft OpenGL headers dependency */
+#endif
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#include <iup.h>
+#include <iupgl.h>
+
+#include <im.h>
+#include <im_image.h>
+#include <im_util.h>
+#include <im_convert.h>
+
+int app_repaint_cb(Ihandle* self)
+{
+  unsigned char* gl_data = (unsigned char*)IupGetAttribute(self, "APP_GL_DATA");
+  int width = IupGetInt(self, "APP_GL_WIDTH");
+  int height = IupGetInt(self, "APP_GL_HEIGHT");
+  IupGLMakeCurrent(self);        /* activates this GL Canvas as the current drawing area. */
+  glClear(GL_COLOR_BUFFER_BIT);  /* clears the back buffer */
+
+  if (gl_data)
+  {
+    /* Draws the captured image at (0,0) */
+    glRasterPos2f(0.f, 0.f); 
+    glDrawPixels(width, height, GL_RGB, GL_UNSIGNED_BYTE, gl_data);
+  }
+
+  IupGLSwapBuffers(self);        /* swap data from back buffer to front buffer */
+  return IUP_DEFAULT;
+} 
+
+void appGLInit(int width, int height)
+{
+  glClearColor(0., 0., 0., 1.0);                   /* window background */
+  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);           /* data alignment is 1 */
+
+  glViewport(0, 0, width, height);
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  gluOrtho2D (0.0, (GLdouble)width, 0.0, (GLdouble)height);
+
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+}
+
+int app_resize_cb(Ihandle* self, int width, int height)
+{
+  IupGLMakeCurrent(self);
+  appGLInit(width, height);
+  return IUP_DEFAULT;
+} 
+
+/* OpenGL does not supports palette based images, so convert to RGB */
+/* this function can also be use for RGBA images */
+void ConvertMapToGLData(unsigned char* data, int count, int depth, long* palette, int palette_count)
+{
+  int c, i;
+  unsigned char r[256], g[256], b[256];
+
+  unsigned char* src_data = data + count-1;
+  unsigned char* dst_data = data + depth*(count-1);
+
+  for (c = 0; c < palette_count; c++)
+    imColorDecode(&r[c], &g[c], &b[c], palette[c]);
+
+  for (i = 0; i < count; i++)
+  {
+    int index = *src_data;
+    *dst_data       =  r[index];
+    *(dst_data+1) = g[index];
+    *(dst_data+2) = b[index];
+
+    dst_data -= depth;
+    src_data--;
+  }
+}
+
+int app_open_cb(Ihandle* self)
+{
+  imFile* ifile;             /* file input */
+  int ret, error;
+  unsigned char* gl_data = (unsigned char*)IupGetAttribute(self, "APP_GL_DATA");
+  char filename[1024] = ".\\*.*";
+
+  /* get a file name */
+  ret = IupGetFile(filename);
+  if (ret == -1)
+    return IUP_DEFAULT;
+
+  ifile = imFileOpen(filename, &error);
+  if (!ifile)
+  {
+    IupMessage("Error", "Error reading image file.");
+    return IUP_DEFAULT;
+  }
+
+  {
+    int width = 0, height = 0, file_color_mode, color_space;
+    Ihandle* dialog = IupGetDialog(self);
+    imFileReadImageInfo(ifile, 0, &width, &height, &file_color_mode, NULL);
+
+    /* alocates the buffers */
+    if (gl_data) free(gl_data);
+    gl_data = malloc(width*height*3);
+    IupSetAttribute(dialog, "APP_GL_DATA", gl_data);
+    IupSetfAttribute(dialog, "APP_GL_WIDTH", "%d", width);
+    IupSetfAttribute(dialog, "APP_GL_HEIGHT", "%d", height);
+
+    imFileReadImageData(ifile, gl_data, 1, IM_PACKED);
+
+    color_space = imColorModeSpace(file_color_mode);
+    if (color_space == IM_MAP || color_space == IM_GRAY || color_space == IM_BINARY)
+    {
+      long palette[256];
+      int palette_count;
+      imFileGetPalette(ifile, palette, &palette_count);
+      ConvertMapToGLData(gl_data, width*height, 3, palette, palette_count);
+    }
+  }
+
+  imFileClose(ifile);
+
+  return IUP_DEFAULT;
+}
+
+int app_exit_cb(Ihandle *self)
+{
+  unsigned char* gl_data = (unsigned char*)IupGetAttribute(self, "APP_GL_DATA");
+
+  /* destroy buffers */
+  if (gl_data) 
+    free(gl_data);
+
+  return IUP_CLOSE;
+}
+
+int app_about_cb(Ihandle *self)
+{
+  IupMessagef("About", "IUPGLView 1.0\n"
+                       "Tecgraf/PUC-Rio\n"
+                       " ---------------- \n"
+                       "IUP Version %s\n"
+                       "IM Version %s\n"
+                       " ---------------- \n"
+                       "OpenGL:\n"
+                       "  Vendor: %s\n"
+                       "  Renderer: %s\n"
+                       "  Version: %s\n"
+                       , IUP_RELEASE_VERSION, IM_VERSION, 
+                         glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION));
+  return IUP_DEFAULT;
+}
+
+void mainMenuCreate(void) 
+{
+  Ihandle* file_menu = IupMenu(
+     IupItem( "Open...", "app_open_cb"),
+     IupSeparator(),
+     IupItem( "Exit", "app_exit_cb"),
+     NULL
+  );
+
+  Ihandle* menu = IupMenu(
+     IupSubmenu("File", file_menu),
+     NULL
+  );
+
+  /* this will be used by the dialog */
+  IupSetHandle("app_menu", menu);
+
+  IupSetFunction("app_open_cb", (Icallback)app_open_cb);
+  IupSetFunction("app_exit_cb", (Icallback)app_exit_cb);
+}
+
+void mainDialogCreate(void)
+{
+  Ihandle *dialog, *box, *canvas;
+
+  /* initialize interface */
+
+  /* canvas for the image */
+
+  canvas = IupGLCanvas("app_repaint_cb");
+  IupSetAttribute(canvas, "BORDER", "NO");
+  IupSetAttribute(canvas, "BUFFER", "DOUBLE");   /* use double buffer */
+  IupSetAttribute(canvas, "RESIZE_CB", "app_resize_cb");   /* configure the resize callback */
+
+  IupSetFunction("app_resize_cb", (Icallback)app_resize_cb);
+  IupSetFunction("app_repaint_cb", (Icallback)app_repaint_cb);
+
+  /* this is the most external box that puts together
+     the toolbar, the two canvas and the status bar */
+  box = IupSetAttributes(IupHbox(
+            canvas, 
+            NULL), "MARGIN=10x10");
+
+  /* create the dialog and set its attributes */
+
+  mainMenuCreate();
+
+  dialog = IupDialog(box);
+  IupSetAttribute(dialog, "MENU", "app_menu");     /* configure the menu */
+  IupSetAttribute(dialog, "CLOSE_CB", "app_exit_cb");
+  IupSetAttribute(dialog, "TITLE", "IUPGLView");
+  IupSetAttribute(dialog, "RASTERSIZE", "680x380"); /* initial size */
+  IupSetAttribute(dialog, "SHRINK", "YES");
+  IupSetHandle("app_dialog", dialog);
+
+  IupShowXY(dialog, IUP_CENTER, IUP_CENTER);
+}
+
+int main(int argc, char* argv[]) 
+{
+  /* IUP initialization */
+  IupOpen();
+  IupGLCanvasOpen();
+
+  /* Create and show the main dialog */
+  mainDialogCreate();
+
+  /* IUP event loop */
+  IupMainLoop();
+
+  /* IUP closing */
+  IupClose();
+
+  return 0;
+}