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- /* generic.c */
-
- /* Demo of BEOS Mesa rendering */
-
- /*
- * See Mesa/include/GL/osmesa.h for documentation of the OSMesa functions.
- *
- * If you want to render BIG images you'll probably have to increase
- * MAX_WIDTH and MAX_HEIGHT in src/config.h.
- *
- * This program is in the public domain.
- *
- * BEOS output provided by Tinic Urou
- * 5uro@informatik.uni-hamburg.de
- */
-
- #include <AppKit.h>
- #include <InterfaceKit.h>
- #include <KernelKit.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "GL/osmesa.h"
-
- /* imported from demo code */
-
- extern int gl_width,gl_height;
- extern void render_image(void);
-
- const ulong APP_SIGNATURE = '????';
-
- class MesaWindow;
- class MesaView;
- class MesaApp;
-
- // Lets make our life easy and make them global:
-
- BBitmap *the_bitmap;
- MesaView *the_view;
- MesaWindow *the_window;
-
- class MesaView : public BView
- {
- public:
-
- MesaView(BRect frame):BView(frame,"Mesa View",B_FOLLOW_NONE,B_WILL_DRAW)
- {
- };
-
- void Draw(BRect frame)
- {
- DrawBitmap(the_bitmap,BPoint(0,0));
- };
- };
-
- class MesaWindow : public BWindow
- {
- public:
-
- MesaWindow(int width, int height):BWindow(BRect(0,0,width-1,height-1),"MesaView",B_TITLED_WINDOW,B_NOT_RESIZABLE|B_NOT_ZOOMABLE)
- {
- // Move window to right position
- MoveTo(80, 24);
- // Create bitmap view
- Lock();
- AddChild(the_view = new MesaView(BRect(0, 0, (gl_width)-1, (gl_height)-1)));
- Unlock();
- };
-
- bool QuitRequested(void)
- {
- be_app->PostMessage(B_QUIT_REQUESTED);
- return TRUE;
- };
- };
-
- class MesaApp : public BApplication
- {
- public:
-
- MesaApp():BApplication(APP_SIGNATURE)
- {
- the_window = NULL;
- the_bitmap = NULL;
- };
-
- void ReadyToRun(void)
- {
- // Allocate the bitmap
- the_bitmap = new BBitmap(BRect(0, 0, gl_width-1, gl_height-1), B_RGB_32_BIT);
-
- uchar *bits = (uchar *)the_bitmap->Bits();
-
- memset(bits,0,the_bitmap->BytesPerRow()*gl_height);
-
- // Open window
- the_window = new MesaWindow((gl_width),(gl_height));
- the_window->Show();
-
- OSMesaContext ctx;
- unsigned char *buffer;
- double start,end;
-
- // Create an RGBA-mode context
- ctx = OSMesaCreateContext( GL_RGBA, NULL );
-
- // Bind the buffer to the context and make it current */
- OSMesaMakeCurrent( ctx, bits, GL_UNSIGNED_BYTE, gl_width, gl_height );
- OSMesaPixelStore( OSMESA_Y_UP, 0 );
-
- // here is the Mesa call
- start=system_time();
- render_image();
- end=system_time();
- printf("Rendering took %3.1f seconds\n",(float)((end-start)/1000000));
-
- // destroy the context
- OSMesaDestroyContext( ctx );
-
- the_window->Lock();
- the_view->Draw(the_view->Bounds());
- the_window->Unlock();
- };
-
- bool QuitRequested(void)
- {
- // Make sure that the window closes first
- if (BApplication::QuitRequested())
- {
- if (the_bitmap) delete the_bitmap;
- return TRUE;
- }
- return FALSE;
- };
-
- void AboutRequested(void)
- {
- char str[256];
- sprintf(str, "MesaDemos, ported by Tinic Urou\n<5uro@informatik.uni-hamburg.de>\nFreely distributable.");
- BAlert *the_alert = new BAlert("", str, "OK");
- the_alert->Go();
- };
- };
-
- int main( int argc, char *argv[] )
- {
- MesaApp *the_app;
-
- the_app = new MesaApp();
- the_app->Run();
- delete the_app;
-
- return 0;
- }
-