glview.cpp

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

void BGLView::SwapBuffers(bool vSync)
{
	MesaDriver * md = (MesaDriver *) m_gc;
	assert(md);
	md->SwapBuffers();

	if (vSync) {
		BScreen screen(Window());
		screen.WaitForRetrace();
	}
}


#if 0
void BGLView::CopySubBufferMESA(GLint x, GLint y, GLuint width, GLuint height)
{
   MesaDriver * md = (MesaDriver *) m_gc;
   assert(md);
   md->CopySubBuffer(x, y, width, height);
}
#endif

BView *	BGLView::EmbeddedView()
{
	return NULL;
}

status_t BGLView::CopyPixelsOut(BPoint source, BBitmap *dest)
{
	if (! dest || ! dest->Bounds().IsValid())
		return B_BAD_VALUE;

	MesaDriver * md = (MesaDriver *) m_gc;
	assert(md);
	return md->CopyPixelsOut(source, dest);
}

status_t BGLView::CopyPixelsIn(BBitmap *source, BPoint dest)
{
	if (! source || ! source->Bounds().IsValid())
		return B_BAD_VALUE;

	MesaDriver * md = (MesaDriver *) m_gc;
	assert(md);
	return md->CopyPixelsIn(source, dest);
}


void BGLView::ErrorCallback(unsigned long errorCode) // Mesa's GLenum is not ulong but uint!
{
	char msg[32];
	sprintf(msg, "GL: Error code $%04lx.", errorCode);
	// debugger(msg);
	fprintf(stderr, "%s\n", msg);
	return;
}

void BGLView::Draw(BRect updateRect)
{
   // printf("BGLView::Draw()\n");
   MesaDriver * md = (MesaDriver *) m_gc;
   assert(md);
   md->Draw(updateRect);
}

void BGLView::AttachedToWindow()
{
   BView::AttachedToWindow();

   // don't paint window background white when resized
   SetViewColor(B_TRANSPARENT_32_BIT);
}

void BGLView::AllAttached()
{
   BView::AllAttached();
//   printf("BGLView AllAttached\n");
}

void BGLView::DetachedFromWindow()
{
   BView::DetachedFromWindow();
}

void BGLView::AllDetached()
{
   BView::AllDetached();
//   printf("BGLView AllDetached");
}

void BGLView::FrameResized(float width, float height)
{
   return BView::FrameResized(width, height);
}

status_t BGLView::Perform(perform_code d, void *arg)
{
   return BView::Perform(d, arg);
}


status_t BGLView::Archive(BMessage *data, bool deep) const
{
   return BView::Archive(data, deep);
}

void BGLView::MessageReceived(BMessage *msg)
{
   BView::MessageReceived(msg);
}

void BGLView::SetResizingMode(uint32 mode)
{
   BView::SetResizingMode(mode);
}

void BGLView::Show()
{
   BView::Show();
}

void BGLView::Hide()
{
   BView::Hide();
}

BHandler *BGLView::ResolveSpecifier(BMessage *msg, int32 index,
                                    BMessage *specifier, int32 form,
                                    const char *property)
{
   return BView::ResolveSpecifier(msg, index, specifier, form, property);
}

status_t BGLView::GetSupportedSuites(BMessage *data)
{
   return BView::GetSupportedSuites(data);
}

void BGLView::DirectConnected( direct_buffer_info *info )
{
#if 0
	if (! m_direct_connected && m_direct_connection_disabled) 
		return; 

	direct_info_locker->Lock(); 
	switch(info->buffer_state & B_DIRECT_MODE_MASK) { 
	case B_DIRECT_START: 
		m_direct_connected = true;
	case B_DIRECT_MODIFY: 
		// Get clipping information 
		if (m_clip_list)
			free(m_clip_list); 
		m_clip_list_count = info->clip_list_count; 
		m_clip_list = (clipping_rect *) malloc(m_clip_list_count*sizeof(clipping_rect)); 
		if (m_clip_list) { 
			memcpy(m_clip_list, info->clip_list, m_clip_list_count*sizeof(clipping_rect));
			fBits = (uint8 *) info->bits; 
			fRowBytes = info->bytes_per_row; 
			fFormat = info->pixel_format; 
			fBounds = info->window_bounds; 
			fDirty = true; 
		} 
		break; 
	case B_DIRECT_STOP: 
		fConnected = false; 
		break; 
	} 
	direct_info_locker->Unlock(); 
#endif
}

void BGLView::EnableDirectMode( bool enabled )
{
   // TODO
}


//---- virtual reserved methods ----------

void BGLView::_ReservedGLView1() {}
void BGLView::_ReservedGLView2() {}
void BGLView::_ReservedGLView3() {}
void BGLView::_ReservedGLView4() {}
void BGLView::_ReservedGLView5() {}
void BGLView::_ReservedGLView6() {}
void BGLView::_ReservedGLView7() {}
void BGLView::_ReservedGLView8() {}

#if 0
// Not implemented!!!

BGLView::BGLView(const BGLView &v)
	: BView(v)
{
   // XXX not sure how this should work
   printf("Warning BGLView::copy constructor not implemented\n");
}

BGLView &BGLView::operator=(const BGLView &v)
{
   printf("Warning BGLView::operator= not implemented\n");
	return *this;
}
#endif

void BGLView::dither_front()
{
   // no-op
}

bool BGLView::confirm_dither()
{
   // no-op
   return false;
}

void BGLView::draw(BRect r)
{
   // XXX no-op ???
}

/* Direct Window stuff */
void BGLView::drawScanline( int x1, int x2, int y, void *data )
{
   // no-op
}

void BGLView::scanlineHandler(struct rasStateRec *state,
                              GLint x1, GLint x2)
{
   // no-op
}

void BGLView::lock_draw()
{
   // no-op
}

void BGLView::unlock_draw()
{
   // no-op
}

bool BGLView::validateView()
{
   // no-op
   return true;
}

// #pragma mark -

MesaDriver::MesaDriver()
{
   m_glcontext 		= NULL;
   m_glvisual		= NULL;
   m_glframebuffer 	= NULL;
   m_bglview 		= NULL;
   m_bitmap 		= NULL;

   m_clear_color[BE_RCOMP] = 0;
   m_clear_color[BE_GCOMP] = 0;
   m_clear_color[BE_BCOMP] = 0;
   m_clear_color[BE_ACOMP] = 0;

   m_clear_index = 0;
}


MesaDriver::~MesaDriver()
{
   _mesa_destroy_visual(m_glvisual);
   _mesa_destroy_framebuffer(m_glframebuffer);
   _mesa_destroy_context(m_glcontext);
   
   delete m_bitmap;
}


void MesaDriver::Init(BGLView * bglview, GLcontext * ctx, GLvisual * visual, GLframebuffer * framebuffer)
{
	m_bglview 		= bglview;
	m_glcontext 	= ctx;
	m_glvisual 		= visual;
	m_glframebuffer = framebuffer;

	MesaDriver * md = (MesaDriver *) ctx->DriverCtx;
	struct swrast_device_driver * swdd = _swrast_GetDeviceDriverReference( ctx );
	TNLcontext * tnl = TNL_CONTEXT(ctx);

	assert(md->m_glcontext == ctx );
	assert(tnl);
	assert(swdd);

	// Use default TCL pipeline
	tnl->Driver.RunPipeline = _tnl_run_pipeline;
 
	swdd->SetBuffer = this->SetBuffer;
}


void MesaDriver::LockGL()
{
	m_bglview->LockLooper();

   UpdateState(m_glcontext, 0);
   _mesa_make_current(m_glcontext, m_glframebuffer);
}


void MesaDriver::UnlockGL()
{
	if (m_bglview->Looper()->IsLocked())
		m_bglview->UnlockLooper();
   // Could call _mesa_make_current(NULL, NULL) but it would just
   // hinder performance
}


void MesaDriver::SwapBuffers() const
{
    _mesa_notifySwapBuffers(m_glcontext);

	if (m_bitmap) {
		m_bglview->LockLooper();
		m_bglview->DrawBitmap(m_bitmap);
		m_bglview->UnlockLooper();
	};
}


void MesaDriver::CopySubBuffer(GLint x, GLint y, GLuint width, GLuint height) const
{
   if (m_bitmap) {
      // Source bitmap and view's bitmap are same size.
      // Source and dest rectangle are the same.
      // Note (x,y) = (0,0) is the lower-left corner, have to flip Y
      BRect srcAndDest;
      srcAndDest.left = x;
      srcAndDest.right = x + width - 1;
      srcAndDest.bottom = m_bottom - y;
      srcAndDest.top = srcAndDest.bottom - height + 1;
      m_bglview->DrawBitmap(m_bitmap, srcAndDest, srcAndDest);
   }
}

status_t MesaDriver::CopyPixelsOut(BPoint location, BBitmap *bitmap)
{
	color_space scs = m_bitmap->ColorSpace();
	color_space dcs = bitmap->ColorSpace();

	if (scs != dcs && (scs != B_RGBA32 || dcs != B_RGB32)) {
		printf("CopyPixelsOut(): incompatible color space: %s != %s\n",
			color_space_name(scs),
			color_space_name(dcs));
		return B_BAD_TYPE;
	}
	
	// debugger("CopyPixelsOut()");
	
	BRect sr = m_bitmap->Bounds();
	BRect dr = bitmap->Bounds();

	sr = sr & dr.OffsetBySelf(location);
	dr = sr.OffsetByCopy(-location.x, -location.y); 
	
	uint8 *ps = (uint8 *) m_bitmap->Bits();
	uint8 *pd = (uint8 *) bitmap->Bits();
	uint32 *s, *d;
	uint32 y;
	for (y = (uint32) sr.top; y <= (uint32) sr.bottom; y++) {
		s = (uint32 *) (ps + y * m_bitmap->BytesPerRow());
		s += (uint32) sr.left;
		
		d = (uint32 *) (pd + (y + (uint32) (dr.top - sr.top)) * bitmap->BytesPerRow());
		d += (uint32) dr.left;
		
		memcpy(d, s, dr.IntegerWidth() * 4);
	}
	return B_OK;
}

status_t MesaDriver::CopyPixelsIn(BBitmap *bitmap, BPoint location)
{
	color_space scs = bitmap->ColorSpace();
	color_space dcs = m_bitmap->ColorSpace();

	if (scs != dcs && (dcs != B_RGBA32 || scs != B_RGB32)) {
		printf("CopyPixelsIn(): incompatible color space: %s != %s\n",
			color_space_name(scs),
			color_space_name(dcs));
		return B_BAD_TYPE;
	}
	
	// debugger("CopyPixelsIn()");