set_pixel_zoom

panda/src/display/config_display.cxx

@@ -295,6 +295,10 @@ ConfigVariableInt back_buffers
 ("back-buffers", 1,
  PRC_DESC("The default number of back buffers requested."));
 
+ConfigVariableDouble pixel_zoom
+("pixel-zoom", 1.0,
+ PRC_DESC("The default pixel_zoom factor for new windows."));
+
 ConfigVariableDouble background_color
 ("background-color", "0.41 0.41 0.41",
  PRC_DESC("Specifies the rgb(a) value of the default background color for a "

panda/src/display/config_display.h

@@ -88,6 +88,8 @@ extern EXPCL_PANDA_DISPLAY ConfigVariableInt stencil_bits;
 extern EXPCL_PANDA_DISPLAY ConfigVariableInt multisamples;
 extern EXPCL_PANDA_DISPLAY ConfigVariableInt back_buffers;
 
+extern EXPCL_PANDA_DISPLAY ConfigVariableDouble pixel_zoom;
+
 extern EXPCL_PANDA_DISPLAY ConfigVariableDouble background_color;
 extern EXPCL_PANDA_DISPLAY ConfigVariableBool sync_video;
 extern EXPCL_PANDA_DISPLAY ConfigVariableBool basic_shaders_only;

panda/src/display/displayRegion.cxx

@@ -136,7 +136,7 @@ set_dimensions(float l, float r, float b, float t) {
   cdata->_t = t;
 
   if (_window != (GraphicsOutput *)NULL && _window->has_size()) {
-    do_compute_pixels(_window->get_x_size(), _window->get_y_size(), cdata);
+    do_compute_pixels(_window->get_fb_x_size(), _window->get_fb_y_size(), cdata);
   }
 }
 
@@ -296,7 +296,7 @@ compute_pixels() {
 
   if (_window != (GraphicsOutput *)NULL) {
     CDWriter cdata(_cycler);
-    do_compute_pixels(_window->get_x_size(), _window->get_y_size(), 
+    do_compute_pixels(_window->get_fb_x_size(), _window->get_fb_y_size(), 
                       cdata);
   }
 }
@@ -316,7 +316,7 @@ compute_pixels_all_stages() {
   if (_window != (GraphicsOutput *)NULL) {
     OPEN_ITERATE_ALL_STAGES(_cycler) {
       CDStageWriter cdata(_cycler, pipeline_stage);
-      do_compute_pixels(_window->get_x_size(), _window->get_y_size(), 
+      do_compute_pixels(_window->get_fb_x_size(), _window->get_fb_y_size(), 
                         cdata);
     }
     CLOSE_ITERATE_ALL_STAGES(_cycler);
@@ -554,6 +554,30 @@ make_cull_result_graph() {
   return cull_result->make_result_graph();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: DisplayRegion::supports_pixel_zoom
+//       Access: Published, Virtual
+//  Description: Returns true if a call to set_pixel_zoom() will be
+//               respected, false if it will be ignored.  If this
+//               returns false, then get_pixel_factor() will always
+//               return 1.0, regardless of what value you specify for
+//               set_pixel_zoom().
+//
+//               This may return false if the underlying renderer
+//               doesn't support pixel zooming, or if you have called
+//               this on a DisplayRegion that doesn't have both
+//               set_clear_color() and set_clear_depth() enabled.
+////////////////////////////////////////////////////////////////////
+bool DisplayRegion::
+supports_pixel_zoom() const {
+  if (_window != (GraphicsOutput *)NULL) {
+    if (_window->supports_pixel_zoom()) {
+      return get_clear_color_active() && get_clear_depth_active();
+    }
+  }
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: DisplayRegion::win_display_regions_changed
 //       Access: Private

panda/src/display/displayRegion.h

@@ -128,6 +128,8 @@ PUBLISHED:
   PT(PandaNode) make_cull_result_graph();
 
 public:
+  virtual bool supports_pixel_zoom() const;
+
   INLINE void set_cull_result(CullResult *cull_result, SceneSetup *scene_setup,
                               Thread *current_thread);
   INLINE CullResult *get_cull_result(Thread *current_thread) const;

panda/src/display/drawableRegion.I

@@ -32,6 +32,8 @@ DrawableRegion() :
     _clear_value[i] = Colorf(0.0f, 0.0f, 0.0f, 0.0f);
   }
   _clear_value[RTP_depth] = Colorf(1.0f,1.0f,1.0f,1.0f);
+  _pixel_zoom = 1.0f;
+  _pixel_factor = 1.0f;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -42,7 +44,9 @@ DrawableRegion() :
 INLINE DrawableRegion::
 DrawableRegion(const DrawableRegion &copy) :
   _screenshot_buffer_type(copy._screenshot_buffer_type),
-  _draw_buffer_type(copy._draw_buffer_type)
+  _draw_buffer_type(copy._draw_buffer_type),
+  _pixel_zoom(copy._pixel_zoom),
+  _pixel_factor(copy._pixel_factor)
 {
   for (int i=0; i<RTP_COUNT; i++) {
     _clear_active[i] = copy._clear_active[i];
@@ -63,6 +67,8 @@ operator = (const DrawableRegion &copy) {
     _clear_active[i] = copy._clear_active[i];
     _clear_value[i] = copy._clear_value[i];
   }
+  _pixel_zoom = copy._pixel_zoom;
+  _pixel_factor = copy._pixel_factor;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -77,6 +83,7 @@ copy_clear_settings(const DrawableRegion &copy) {
     _clear_active[i] = copy._clear_active[i];
     _clear_value[i] = copy._clear_value[i];
   }
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -91,6 +98,7 @@ copy_clear_settings(const DrawableRegion &copy) {
 INLINE void DrawableRegion::
 set_clear_color_active(bool clear_color_active) {
   _clear_active[RTP_color] = clear_color_active;
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -117,6 +125,7 @@ get_clear_color_active() const {
 INLINE void DrawableRegion::
 set_clear_depth_active(bool clear_depth_active) {
   _clear_active[RTP_depth] = clear_depth_active;
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -166,6 +175,7 @@ INLINE void DrawableRegion::
 set_clear_active(int n, bool clear_active) {
   nassertv((n >= 0)&&(n < RTP_COUNT));
   _clear_active[n] = clear_active;
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -296,6 +306,7 @@ disable_clears() {
   for (int i=0; i<RTP_COUNT; i++) {
     _clear_active[i] = false;
   }
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -314,6 +325,66 @@ is_any_clear_active() const {
   return false;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::set_pixel_zoom
+//       Access: Published
+//  Description: Sets the amount by which the pixels of the region are
+//               scaled internally when filling the image interally.
+//               Setting this number larger makes the pixels blockier,
+//               but may make the rendering faster, particularly for
+//               software renderers.  Setting this number to 2.0
+//               reduces the number of pixels that have to be filled
+//               by the renderer by a factor of 2.0.  It doesn't make
+//               sense to set this lower than 1.0.
+//
+//               It is possible to set this on either individual
+//               DisplayRegions or on overall GraphicsWindows, but you
+//               will get better performance for setting it on the
+//               window rather than its individual DisplayRegions.
+//               Also, you may not set it on a DisplayRegion that
+//               doesn't have both clear_color() and clear_depth()
+//               enabled.
+//
+//               This property is only supported on renderers for
+//               which it is particularly useful--currently, this is
+//               the tinydisplay software renderer.  Other kinds of
+//               renderers allow you to set this property, but ignore
+//               it.
+////////////////////////////////////////////////////////////////////
+INLINE void DrawableRegion::
+set_pixel_zoom(float pixel_zoom) {
+  _pixel_zoom = pixel_zoom;
+  update_pixel_factor();
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::get_pixel_zoom
+//       Access: Published
+//  Description: Returns the value set by set_pixel_zoom(), regardless
+//               of whether it is being respected or not.  Also see
+//               get_pixel_factor().
+////////////////////////////////////////////////////////////////////
+INLINE float DrawableRegion::
+get_pixel_zoom() const {
+  return _pixel_zoom;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::get_pixel_factor
+//       Access: Published
+//  Description: Returns the amount by which the height and width of
+//               the region will be scaled internally, based on the
+//               zoom factor set by set_pixel_zoom().  This will
+//               return 1.0 if the pixel_zoom was not set or if it is
+//               not being respected (for instance, because the
+//               underlying renderer doesn't support it--see
+//               supports_pixel_zoom).
+////////////////////////////////////////////////////////////////////
+INLINE float DrawableRegion::
+get_pixel_factor() const {
+  return _pixel_factor;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: DrawableRegion::get_screenshot_buffer_type
 //       Access: Public
@@ -338,3 +409,23 @@ INLINE int DrawableRegion::
 get_draw_buffer_type() const {
   return _draw_buffer_type;
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::update_pixel_factor
+//       Access: Protected
+//  Description: Internal function to reset pixel_factor after it may
+//               have changed.
+////////////////////////////////////////////////////////////////////
+INLINE void DrawableRegion::
+update_pixel_factor() {
+  float new_pixel_factor;
+  if (supports_pixel_zoom()) {
+    new_pixel_factor = 1.0f / sqrt(max(_pixel_zoom, 1.0f));
+  } else {
+    new_pixel_factor = 1.0f;
+  }
+  if (new_pixel_factor != _pixel_factor) {
+    _pixel_factor = new_pixel_factor;
+    pixel_factor_changed();
+  }
+}

panda/src/display/drawableRegion.cxx

@@ -28,6 +28,25 @@ DrawableRegion::
 ~DrawableRegion() {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::supports_pixel_zoom
+//       Access: Published, Virtual
+//  Description: Returns true if a call to set_pixel_zoom() will be
+//               respected, false if it will be ignored.  If this
+//               returns false, then get_pixel_factor() will always
+//               return 1.0, regardless of what value you specify for
+//               set_pixel_zoom().
+//
+//               This may return false if the underlying renderer
+//               doesn't support pixel zooming, or if you have called
+//               this on a DisplayRegion that doesn't have both
+//               set_clear_color() and set_clear_depth() enabled.
+////////////////////////////////////////////////////////////////////
+bool DrawableRegion::
+supports_pixel_zoom() const {
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: DrawableRegion::get_renderbuffer_type
 //       Access: Static, Published
@@ -57,3 +76,12 @@ get_renderbuffer_type(int rtp) {
     return 0;
   };
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: DrawableRegion::pixel_factor_changed
+//       Access: Published, Virtual
+//  Description: Called internally when the pixel factor changes.
+////////////////////////////////////////////////////////////////////
+void DrawableRegion::
+pixel_factor_changed() {
+}

panda/src/display/drawableRegion.h

@@ -95,12 +95,21 @@ PUBLISHED:
 
   INLINE bool is_any_clear_active() const;
 
+  INLINE void set_pixel_zoom(float pixel_zoom);
+  INLINE float get_pixel_zoom() const;
+  INLINE float get_pixel_factor() const;
+  virtual bool supports_pixel_zoom() const;
+
   static int get_renderbuffer_type(int plane);
   
 public:
   INLINE int get_screenshot_buffer_type() const;
   INLINE int get_draw_buffer_type() const;
 
+protected:
+  INLINE void update_pixel_factor();
+  virtual void pixel_factor_changed();
+
 protected:
   int _screenshot_buffer_type;
   int _draw_buffer_type;
@@ -108,6 +117,9 @@ protected:
 private:
   bool    _clear_active[RTP_COUNT];
   Colorf  _clear_value[RTP_COUNT];
+
+  float _pixel_zoom;
+  float _pixel_factor;
 };
 
 

panda/src/display/graphicsOutput.I

@@ -139,8 +139,8 @@ get_rtm_mode(int i) const {
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsOutput::get_x_size
 //       Access: Published
-//  Description: Returns the width of the graphics frame buffer, if it
+//  Description: Returns the visible width of the window or buffer, if
-//               is known.  In certain cases (e.g. fullscreen
+//               it is known.  In certain cases (e.g. fullscreen
 //               windows), the size may not be known until after the
 //               object has been fully created.  Check has_size()
 //               first.
@@ -158,8 +158,8 @@ get_x_size() const {
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsOutput::get_y_size
 //       Access: Published
-//  Description: Returns the height of the graphics frame buffer, if it
+//  Description: Returns the visible height of the window or buffer,
-//               is known.  In certain cases (e.g. fullscreen
+//               if it is known.  In certain cases (e.g. fullscreen
 //               windows), the size may not be known until after the
 //               object has been fully created.  Check has_size()
 //               first.
@@ -174,6 +174,32 @@ get_y_size() const {
   return _y_size;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: GraphicsOutput::get_fb_x_size
+//       Access: Published
+//  Description: Returns the internal width of the window or buffer.
+//               This is almost always the same as get_x_size(),
+//               except when a pixel_zoom is in effect--see
+//               set_pixel_zoom().
+////////////////////////////////////////////////////////////////////
+INLINE int GraphicsOutput::
+get_fb_x_size() const {
+  return max(int(_x_size * get_pixel_factor()), 1);
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: GraphicsOutput::get_fb_y_size
+//       Access: Published
+//  Description: Returns the internal height of the window or buffer.
+//               This is almost always the same as get_y_size(),
+//               except when a pixel_zoom is in effect--see
+//               set_pixel_zoom().
+////////////////////////////////////////////////////////////////////
+INLINE int GraphicsOutput::
+get_fb_y_size() const {
+  return max(int(_y_size * get_pixel_factor()), 1);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsOutput::has_size
 //       Access: Published

panda/src/display/graphicsOutput.cxx

@@ -632,11 +632,14 @@ set_size_and_recalc(int x, int y) {
   _y_size = y;
   _has_size = true;
 
+  int fb_x_size = get_fb_x_size();
+  int fb_y_size = get_fb_y_size();
+
   TotalDisplayRegions::iterator dri;
   for (dri = _total_display_regions.begin();
        dri != _total_display_regions.end();
        ++dri) {
-    (*dri)->compute_pixels_all_stages(x, y);
+    (*dri)->compute_pixels_all_stages(fb_x_size, fb_y_size);
   }
 
   if (_texture_card != 0) {
@@ -920,6 +923,18 @@ void GraphicsOutput::
 end_frame(FrameMode mode, Thread *current_thread) {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: GraphicsOutput::pixel_factor_changed
+//       Access: Published, Virtual
+//  Description: Called internally when the pixel factor changes.
+////////////////////////////////////////////////////////////////////
+void GraphicsOutput::
+pixel_factor_changed() {
+  if (_has_size) {
+    set_size_and_recalc(_x_size, _y_size);
+  }
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsOutput::prepare_for_deletion
 //       Access: Protected

panda/src/display/graphicsOutput.h

@@ -108,6 +108,8 @@ PUBLISHED:
 
   INLINE int get_x_size() const;
   INLINE int get_y_size() const;
+  INLINE int get_fb_x_size() const;
+  INLINE int get_fb_y_size() const;
   INLINE bool has_size() const;
   INLINE bool is_valid() const;
 
@@ -214,7 +216,7 @@ public:
   INLINE PStatCollector &get_draw_window_pcollector();
 
 protected:
-
+  virtual void pixel_factor_changed();
   void prepare_for_deletion();
   void copy_to_textures();
   

panda/src/display/graphicsWindow.cxx

@@ -71,6 +71,7 @@ GraphicsWindow(GraphicsPipe *pipe,
   request_properties(win_prop);
 
   _window_event = "window-event";
+  set_pixel_zoom(pixel_zoom);
 }
 
 ////////////////////////////////////////////////////////////////////

panda/src/tinydisplay/tinyGraphicsStateGuardian.cxx

@@ -504,6 +504,8 @@ TinyGraphicsStateGuardian(GraphicsPipe *pipe,
   GraphicsStateGuardian(CS_yup_right, pipe),
   _textures_lru("textures_lru", td_texture_ram)
 {
+  _current_frame_buffer = NULL;
+  _aux_frame_buffer = NULL;
   _c = NULL;
   _vertices = NULL;
   _vertices_size = 0;
@@ -565,6 +567,11 @@ reset() {
 ////////////////////////////////////////////////////////////////////
 void TinyGraphicsStateGuardian::
 free_pointers() {
+  if (_aux_frame_buffer != (ZBuffer *)NULL) {
+    ZB_close(_aux_frame_buffer);
+    _aux_frame_buffer = NULL;
+  }
+
   if (_vertices != (GLVertex *)NULL) {
     PANDA_FREE_ARRAY(_vertices);
     _vertices = NULL;
@@ -679,6 +686,31 @@ prepare_display_region(DisplayRegionPipelineReader *dr,
   int xmin, ymin, xsize, ysize;
   dr->get_region_pixels_i(xmin, ymin, xsize, ysize);
 
+  float pixel_factor = _current_display_region->get_pixel_factor();
+  if (pixel_factor != 1.0) {
+    // Render into an aux buffer, and zoom it up into the main
+    // frame buffer later.
+    xmin = 0;
+    ymin = 0;
+    xsize = int(xsize * pixel_factor);
+    ysize = int(ysize * pixel_factor);
+    if (_aux_frame_buffer == (ZBuffer *)NULL) {
+      // We add 3 to xsize, since ZB_open may resize the frame buffer
+      // down by up to 3 pixels to make it fit within the
+      // word-alignment rule.
+      _aux_frame_buffer = ZB_open(xsize + 3, ysize, ZB_MODE_RGBA, 0, 0, 0, 0);
+    } else if (_aux_frame_buffer->xsize < xsize || _aux_frame_buffer->ysize < ysize) {
+      ZB_resize(_aux_frame_buffer, NULL, 
+                max(_aux_frame_buffer->xsize, xsize) + 3,
+                max(_aux_frame_buffer->ysize, ysize));
+    }
+    _c->zb = _aux_frame_buffer;
+
+  } else {
+    // Render directly into the main frame buffer.
+    _c->zb = _current_frame_buffer;
+  }
+
   _c->viewport.xmin = xmin;
   _c->viewport.ymin = ymin;
   _c->viewport.xsize = xsize;
@@ -807,6 +839,39 @@ begin_scene() {
 ////////////////////////////////////////////////////////////////////
 void TinyGraphicsStateGuardian::
 end_scene() {
+  if (_c->zb == _aux_frame_buffer) {
+    // Copy the aux frame buffer into the main scene now, zooming it
+    // up to the appropriate size.
+    int xmin, ymin, xsize, ysize;
+    _current_display_region->get_region_pixels_i(xmin, ymin, xsize, ysize);
+    float pixel_factor = _current_display_region->get_pixel_factor();
+
+    int fb_xsize = int(xsize * pixel_factor);
+    int fb_ysize = int(ysize * pixel_factor);
+
+    int tyinc = _current_frame_buffer->linesize / PSZB;
+    int fyinc = _aux_frame_buffer->linesize / PSZB;
+
+    int fyt = 0;
+    for (int ty = 0; ty < ysize; ++ty) {
+      int fy = fyt / ysize;
+      fyt += fb_ysize;
+
+      PIXEL *tp = _current_frame_buffer->pbuf + xmin + (ymin + ty) * tyinc;
+      PIXEL *fp = _aux_frame_buffer->pbuf + fy * fyinc;
+      ZPOINT *tz = _current_frame_buffer->zbuf + xmin + (ymin + ty) * _current_frame_buffer->xsize;
+      ZPOINT *fz = _aux_frame_buffer->zbuf + fy * _aux_frame_buffer->xsize;
+      int fxt = 0;
+      for (int tx = 0; tx < xsize; ++tx) {
+        int fx = fxt / xsize;
+        fxt += fb_xsize;
+
+        tp[tx] = fp[fx];
+        tz[tx] = fz[fx];
+      }
+    }
+    _c->zb = _current_frame_buffer;
+  }
   GraphicsStateGuardian::end_scene();
 }
 

panda/src/tinydisplay/tinyGraphicsStateGuardian.h

@@ -124,6 +124,10 @@ public:
   ZBuffer *_current_frame_buffer;
 
 private:
+  // Allocated by prepare_display_region when necessary for a zoomed
+  // display region.
+  ZBuffer *_aux_frame_buffer;
+
   GLContext *_c;
 
   enum ColorMaterialFlags {

panda/src/tinydisplay/tinyWinGraphicsWindow.cxx

@@ -48,6 +48,7 @@ TinyWinGraphicsWindow(GraphicsPipe *pipe,
 {
   _frame_buffer = NULL;
   _hdc = (HDC)0;
+  update_pixel_factor();
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -133,17 +134,46 @@ begin_flip() {
   HDC bmdc = CreateCompatibleDC(_hdc);
   SelectObject(bmdc, bm);
 
-  SetDIBits(_hdc, bm, 0, _frame_buffer->ysize, _frame_buffer->pbuf,
+  int fb_xsize = get_fb_x_size();
+  int fb_ysize = get_fb_y_size();
+  int fb_ytop = _frame_buffer->ysize - fb_ysize;
+
+  SetDIBits(_hdc, bm, fb_ytop, fb_ysize, _frame_buffer->pbuf,
             &_bitmap_info, DIB_RGB_COLORS);
 
-  BitBlt(_hdc, 0, 0, _frame_buffer->xsize, _frame_buffer->ysize,
+  if (fb_xsize == _frame_buffer->xsize) {
-         bmdc, 0, 0, SRCCOPY);
+    BitBlt(_hdc, 0, 0, fb_xsize, fb_ysize,
+           bmdc, 0, 0, SRCCOPY);
+  } else {
+    StretchBlt(_hdc, 0, 0, _frame_buffer->xsize, _frame_buffer->ysize,
+               bmdc, 0, 0,fb_xsize, fb_ysize,
+               SRCCOPY);
+  }
     
   DeleteDC(bmdc);
   DeleteObject(bm);
   GdiFlush();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: TinyWinGraphicsWindow::supports_pixel_zoom
+//       Access: Published, Virtual
+//  Description: Returns true if a call to set_pixel_zoom() will be
+//               respected, false if it will be ignored.  If this
+//               returns false, then get_pixel_factor() will always
+//               return 1.0, regardless of what value you specify for
+//               set_pixel_zoom().
+//
+//               This may return false if the underlying renderer
+//               doesn't support pixel zooming, or if you have called
+//               this on a DisplayRegion that doesn't have both
+//               set_clear_color() and set_clear_depth() enabled.
+////////////////////////////////////////////////////////////////////
+bool TinyWinGraphicsWindow::
+supports_pixel_zoom() const {
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: TinyWinGraphicsWindow::close_window
 //       Access: Protected, Virtual

panda/src/tinydisplay/tinyWinGraphicsWindow.h

@@ -46,6 +46,7 @@ public:
   virtual void end_frame(FrameMode mode, Thread *current_thread);
 
   virtual void begin_flip();
+  virtual bool supports_pixel_zoom() const;
 
 protected:
   virtual void close_window();

panda/src/tinydisplay/vertex.cxx

@@ -4,13 +4,13 @@
 void gl_eval_viewport(GLContext * c)
 {
     GLViewport *v;
-    float zsize = (1 << (ZB_Z_BITS + ZB_POINT_Z_FRAC_BITS));
+    float zsize = ((long long)1 << (ZB_Z_BITS + ZB_POINT_Z_FRAC_BITS));
 
     v = &c->viewport;
 
     v->trans.X = ((v->xsize - 0.5f) / 2.0f) + v->xmin;
     v->trans.Y = ((v->ysize - 0.5f) / 2.0f) + v->ymin;
-    v->trans.Z = ((zsize - 0.5f) / 2.0f) + ((1 << ZB_POINT_Z_FRAC_BITS)) / 2;
+    v->trans.Z = ((zsize - 0.5f) / 2.0f);
 
     v->scale.X = (v->xsize - 0.5f) / 2.0f;
     v->scale.Y = -(v->ysize - 0.5f) / 2.0f;

panda/src/tinydisplay/zbuffer.cxx

@@ -12,7 +12,7 @@
 ZBuffer *ZB_open(int xsize, int ysize, int mode,
 		 int nb_colors,
 		 unsigned char *color_indexes,
-		 int *color_table,
+		 unsigned int *color_table,
 		 void *frame_buffer)
 {
     ZBuffer *zb;
@@ -49,9 +49,9 @@ ZBuffer *ZB_open(int xsize, int ysize, int mode,
 	goto error;
     }
 
-    size = zb->xsize * zb->ysize * sizeof(unsigned short);
+    size = zb->xsize * zb->ysize * sizeof(ZPOINT);
 
-    zb->zbuf = (unsigned short *)gl_malloc(size);
+    zb->zbuf = (ZPOINT *)gl_malloc(size);
     if (zb->zbuf == NULL)
 	goto error;
 
@@ -100,9 +100,9 @@ void ZB_resize(ZBuffer * zb, void *frame_buffer, int xsize, int ysize)
     zb->ysize = ysize;
     zb->linesize = (xsize * PSZB + 3) & ~3;
 
-    size = zb->xsize * zb->ysize * sizeof(unsigned short);
+    size = zb->xsize * zb->ysize * sizeof(ZPOINT);
     gl_free(zb->zbuf);
-    zb->zbuf = (unsigned short *)gl_malloc(size);
+    zb->zbuf = (ZPOINT *)gl_malloc(size);
 
     if (zb->frame_buffer_allocated)
 	gl_free(zb->pbuf);
@@ -142,11 +142,11 @@ static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb,
                                      void *buf, int linesize) 
 {
     PIXEL *q;
-    unsigned short *p, *p1;
+    unsigned char *p, *p1;
     int y, n;
 
     q = zb->pbuf;
-    p1 = (unsigned short *) buf;
+    p1 = (unsigned char *) buf;
 
     for (y = 0; y < zb->ysize; y++) {
 	p = p1;
@@ -159,7 +159,7 @@ static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb,
 	    q += 4;
 	    p += 4;
 	} while (--n > 0);
-	p1 = (unsigned short *)((char *)p1 + linesize);
+	p1 = (unsigned char *)((char *)p1 + linesize);
     }
 }
 
@@ -222,7 +222,7 @@ void memset_s(void *adr, int val, int count)
 {
     int i, n, v;
     unsigned int *p;
-    unsigned short *q;
+    unsigned char *q;
 
     p = (unsigned int *)adr;
     v = val | (val << 16);
@@ -236,7 +236,7 @@ void memset_s(void *adr, int val, int count)
 	p += 4;
     }
 
-    q = (unsigned short *) p;
+    q = (unsigned char *) p;
     n = count & 7;
     for (i = 0; i < n; i++)
 	*q++ = val;
@@ -294,15 +294,15 @@ void memset_RGB24(void *adr,int r, int v, int b,long count)
     }
 }
 
-void ZB_clear(ZBuffer * zb, int clear_z, int z,
+void ZB_clear(ZBuffer * zb, int clear_z, ZPOINT z,
-	      int clear_color, int r, int g, int b, int a)
+	      int clear_color, unsigned int r, unsigned int g, unsigned int b, unsigned int a)
 {
-  int color;
+  unsigned int color;
   int y;
   PIXEL *pp;
   
   if (clear_z) {
-    memset_s(zb->zbuf, z, zb->xsize * zb->ysize);
+    memset(zb->zbuf, 0, zb->xsize * zb->ysize * sizeof(ZPOINT));
   }
   if (clear_color) {
     color = RGBA_TO_PIXEL(r, g, b, a);
@@ -314,20 +314,19 @@ void ZB_clear(ZBuffer * zb, int clear_z, int z,
   }
 }
 
-void ZB_clear_viewport(ZBuffer * zb, int clear_z, int z,
+void ZB_clear_viewport(ZBuffer * zb, int clear_z, ZPOINT z,
-                       int clear_color, int r, int g, int b, int a,
+                       int clear_color, unsigned int r, unsigned int g, unsigned int b, unsigned int a,
                        int xmin, int ymin, int xsize, int ysize)
 {
-  int color;
+  unsigned int color;
   int y;
   PIXEL *pp;
-  unsigned short *zz;
+  ZPOINT *zz;
-  int ytop;
 
   if (clear_z) {
     zz = zb->zbuf + xmin + ymin * zb->xsize;
     for (y = 0; y < ysize; ++y) {
-      memset_s(zz, z, xsize);
+      memset(zz, 0, xsize * sizeof(ZPOINT));
       zz += zb->xsize;
     }
   }
@@ -344,11 +343,11 @@ void ZB_clear_viewport(ZBuffer * zb, int clear_z, int z,
 #define ZB_ST_FRAC_HIGH (1 << ZB_POINT_ST_FRAC_BITS)
 #define ZB_ST_FRAC_MASK (ZB_ST_FRAC_HIGH - 1)
 
-PIXEL lookup_texture_bilinear(ZTexture *texture, int s, int t)
+PIXEL lookup_texture_bilinear(ZTexture *texture, unsigned int s, unsigned int t)
 {
   PIXEL p1, p2, p3, p4;
-  int sf, tf;
+  unsigned int sf, tf;
-  int r, g, b, a;
+  unsigned int r, g, b, a;
 
   p1 = ZB_LOOKUP_TEXTURE_NEAREST(texture, s, t);
   p2 = ZB_LOOKUP_TEXTURE_NEAREST(texture, s + ZB_ST_FRAC_HIGH, t);

panda/src/tinydisplay/zbuffer.h

@@ -7,14 +7,10 @@
 
 #include "zfeatures.h"
 
+typedef unsigned int ZPOINT;
 #define ZB_Z_BITS 16
-
 #define ZB_POINT_Z_FRAC_BITS 14
 
-/* The number of bits for lookup for S and T texture coords.  This is
-   based on a fixed texture size of 256x256. */
-#define ZB_POINT_ST_BITS 8
-
 /* The number of fractional bits below the S and T texture coords.
    The more we have, the more precise the texel calculation will be
    when we zoom into small details of a texture; but the greater
@@ -88,7 +84,7 @@ typedef unsigned int PIXEL;
 
 typedef struct {
   PIXEL *pixmap;
-  int s_mask, t_mask, t_shift;
+  unsigned int s_mask, t_mask, t_shift;
 } ZTexture;
 
 typedef struct {
@@ -96,7 +92,7 @@ typedef struct {
     int linesize; /* line size, in bytes */
     int mode;
     
-    unsigned short *zbuf;
+    ZPOINT *zbuf;
     PIXEL *pbuf;
     int frame_buffer_allocated;
     
@@ -120,20 +116,20 @@ typedef struct {
 ZBuffer *ZB_open(int xsize,int ysize,int mode,
 		 int nb_colors,
 		 unsigned char *color_indexes,
-		 int *color_table,
+		 unsigned int *color_table,
 		 void *frame_buffer);
 
 
 void ZB_close(ZBuffer *zb);
 
 void ZB_resize(ZBuffer *zb,void *frame_buffer,int xsize,int ysize);
-void ZB_clear(ZBuffer *zb,int clear_z,int z,
+void ZB_clear(ZBuffer *zb, int clear_z, ZPOINT z,
-	      int clear_color,int r,int g,int b,int a);
+	      int clear_color, unsigned int r, unsigned int g, unsigned int b, unsigned int a);
-void ZB_clear_viewport(ZBuffer * zb, int clear_z, int z,
+void ZB_clear_viewport(ZBuffer * zb, int clear_z, ZPOINT z,
-                       int clear_color, int r, int g, int b, int a,
+                       int clear_color, unsigned int r, unsigned int g, unsigned int b, unsigned int a,
                        int xmin, int ymin, int xsize, int ysize);
 
-PIXEL lookup_texture_bilinear(ZTexture *texture, int s, int t);
+PIXEL lookup_texture_bilinear(ZTexture *texture, unsigned int s, unsigned int t);
 
 /* linesize is in BYTES */
 void ZB_copyFrameBuffer(ZBuffer *zb,void *buf,int linesize);

panda/src/tinydisplay/zgl.h

@@ -207,7 +207,7 @@ void gl_eval_viewport(GLContext *c);
 void gl_vertex_transform(GLContext * c, GLVertex * v);
 
 /* image_util.c */
-void gl_convertRGB_to_5R6G5B(unsigned short *pixmap,unsigned char *rgb,
+void gl_convertRGB_to_5R6G5B(unsigned char *pixmap,unsigned char *rgb,
                              int xsize,int ysize);
 void gl_convertRGB_to_8A8R8G8B(unsigned int *pixmap, unsigned char *rgb,
                                int xsize, int ysize);

panda/src/tinydisplay/zline.cxx

@@ -2,13 +2,13 @@
 #include <stdio.h>
 #include "zbuffer.h"
 
-#define ZCMP(z,zpix) ((z) >= (zpix))
+#define ZCMP(z,zpix) ((ZPOINT)(z) >= (ZPOINT)(zpix))
 
 void ZB_plot(ZBuffer * zb, ZBufferPoint * p)
 {
-    unsigned short *pz;
+    ZPOINT *pz;
     PIXEL *pp;
-    int zz;
+    unsigned int zz;
 
     pz = zb->zbuf + (p->y * zb->xsize + p->x);
     pp = (PIXEL *) ((char *) zb->pbuf + zb->linesize * p->y + p->x * PSZB);
@@ -21,7 +21,7 @@ void ZB_plot(ZBuffer * zb, ZBufferPoint * p)
 
 #define INTERP_Z
 static void ZB_line_flat_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, 
-                           int color)
+                           unsigned int color)
 {
 #include "zline.h"
 }
@@ -37,7 +37,7 @@ static void ZB_line_interp_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2)
 /* no Z interpolation */
 
 static void ZB_line_flat(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, 
-                             int color)
+                         unsigned int color)
 {
 #include "zline.h"
 }
@@ -50,7 +50,7 @@ static void ZB_line_interp(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2)
 
 void ZB_line_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2)
 {
-    int color1, color2;
+    unsigned int color1, color2;
 
     color1 = RGBA_TO_PIXEL(p1->r, p1->g, p1->b, p1->a);
     color2 = RGBA_TO_PIXEL(p2->r, p2->g, p2->b, p2->a);
@@ -65,7 +65,7 @@ void ZB_line_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2)
 
 void ZB_line(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2)
 {
-    int color1, color2;
+    unsigned int color1, color2;
 
     color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b);
     color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b);

panda/src/tinydisplay/zline.h

@@ -9,7 +9,7 @@
     register unsigned int rinc, ginc, binc;
 #endif
 #ifdef INTERP_Z
-    register unsigned short *pz;
+    register ZPOINT *pz;
     int zinc;
     register int z, zz;
 #endif

panda/src/tinydisplay/ztriangle.cxx

@@ -12,7 +12,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_noblend_anone_zless
 #include "ztriangle_two.h"
 
@@ -26,7 +26,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_noblend_aless_zless
 #include "ztriangle_two.h"
 
@@ -40,7 +40,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_noblend_amore_zless
 #include "ztriangle_two.h"
 
@@ -54,7 +54,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_blend_anone_zless
 #include "ztriangle_two.h"
 
@@ -68,7 +68,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_blend_aless_zless
 #include "ztriangle_two.h"
 
@@ -82,7 +82,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_blend_amore_zless
 #include "ztriangle_two.h"
 
@@ -96,7 +96,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_nocolor_anone_zless
 #include "ztriangle_two.h"
 
@@ -110,7 +110,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_nocolor_aless_zless
 #include "ztriangle_two.h"
 
@@ -124,7 +124,7 @@
 #define STORE_Z(zpix, z) (zpix) = (z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zon_nocolor_amore_zless
 #include "ztriangle_two.h"
 
@@ -138,7 +138,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_noblend_anone_zless
 #include "ztriangle_two.h"
 
@@ -152,7 +152,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_noblend_aless_zless
 #include "ztriangle_two.h"
 
@@ -166,7 +166,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = (rgb)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_noblend_amore_zless
 #include "ztriangle_two.h"
 
@@ -180,7 +180,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_blend_anone_zless
 #include "ztriangle_two.h"
 
@@ -194,7 +194,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_blend_aless_zless
 #include "ztriangle_two.h"
 
@@ -208,7 +208,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a) (pix) = PIXEL_BLEND_RGB(pix, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_blend_amore_zless
 #include "ztriangle_two.h"
 
@@ -222,7 +222,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) 1
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_nocolor_anone_zless
 #include "ztriangle_two.h"
 
@@ -236,7 +236,7 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) < (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_nocolor_aless_zless
 #include "ztriangle_two.h"
 
@@ -250,6 +250,6 @@
 #define STORE_Z(zpix, z)
 #define STORE_PIX(pix, rgb, r, g, b, a)
 #define ACMP(zb,a) (((unsigned int)(a)) > (zb)->reference_alpha)
-#define ZCMP(zpix, z) ((zpix) < (z))
+#define ZCMP(zpix, z) ((ZPOINT)(zpix) < (ZPOINT)(z))
 #define FNAME(name) name ## _xx_zoff_nocolor_amore_zless
 #include "ztriangle_two.h"

panda/src/tinydisplay/ztriangle.h

@@ -5,7 +5,7 @@
 {
   ZBufferPoint *t,*pr1,*pr2,*l1,*l2;
   float fdx1, fdx2, fdy1, fdy2, fz, d1, d2;
-  unsigned short *pz1;
+  ZPOINT *pz1;
   PIXEL *pp1;
   int part,update_left,update_right;
 
@@ -258,7 +258,7 @@
           register PIXEL *pp;
           register int n;
 #ifdef INTERP_Z
-          register unsigned short *pz;
+          register ZPOINT *pz;
           register unsigned int z,zz;
 #endif
 #ifdef INTERP_RGB

panda/src/tinydisplay/ztriangle_two.h

@@ -276,7 +276,7 @@ void FNAME(ZB_fillTriangleMappingPerspective) (ZBuffer *zb,
 
 #define DRAW_LINE()                                     \
   {                                                     \
-    register unsigned short *pz;                        \
+    register ZPOINT *pz;                        \
     register PIXEL *pp;                                 \
     register unsigned int s,t,z,zz;                     \
     register int n,dsdx,dtdx;                           \
@@ -294,8 +294,8 @@ void FNAME(ZB_fillTriangleMappingPerspective) (ZBuffer *zb,
         float ss,tt;                                    \
         ss=(sz * zinv);                                 \
         tt=(tz * zinv);                                 \
-        s=(int) ss;                                     \
+        s=(unsigned int) ss;                                     \
-        t=(int) tt;                                     \
+        t=(unsigned int) tt;                                     \
         dsdx= (int)( (dszdx - ss*fdzdx)*zinv );         \
         dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );         \
         fz+=fndzdx;                                     \
@@ -319,8 +319,8 @@ void FNAME(ZB_fillTriangleMappingPerspective) (ZBuffer *zb,
       float ss,tt;                                      \
       ss=(sz * zinv);                                   \
       tt=(tz * zinv);                                   \
-      s=(int) ss;                                       \
+      s=(unsigned int) ss;                                       \
-      t=(int) tt;                                       \
+      t=(unsigned int) tt;                                       \
       dsdx= (int)( (dszdx - ss*fdzdx)*zinv );           \
       dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );           \
     }                                                   \
@@ -394,7 +394,7 @@ void FNAME(ZB_fillTriangleMappingPerspectiveFlat) (ZBuffer *zb,
 
 #define DRAW_LINE()                                     \
   {                                                     \
-    register unsigned short *pz;                        \
+    register ZPOINT *pz;                        \
     register PIXEL *pp;                                 \
     register unsigned int s,t,z,zz;                     \
     register int n,dsdx,dtdx;                           \
@@ -417,8 +417,8 @@ void FNAME(ZB_fillTriangleMappingPerspectiveFlat) (ZBuffer *zb,
         float ss,tt;                                    \
         ss=(sz * zinv);                                 \
         tt=(tz * zinv);                                 \
-        s=(int) ss;                                     \
+        s=(unsigned int) ss;                                     \
-        t=(int) tt;                                     \
+        t=(unsigned int) tt;                                     \
         dsdx= (int)( (dszdx - ss*fdzdx)*zinv );         \
         dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );         \
         fz+=fndzdx;                                     \
@@ -442,8 +442,8 @@ void FNAME(ZB_fillTriangleMappingPerspectiveFlat) (ZBuffer *zb,
       float ss,tt;                                      \
       ss=(sz * zinv);                                   \
       tt=(tz * zinv);                                   \
-      s=(int) ss;                                       \
+      s=(unsigned int) ss;                                       \
-      t=(int) tt;                                       \
+      t=(unsigned int) tt;                                       \
       dsdx= (int)( (dszdx - ss*fdzdx)*zinv );           \
       dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );           \
     }                                                   \
@@ -529,7 +529,7 @@ void FNAME(ZB_fillTriangleMappingPerspectiveSmooth) (ZBuffer *zb,
 
 #define DRAW_LINE()                                     \
   {                                                     \
-    register unsigned short *pz;                        \
+    register ZPOINT *pz;                        \
     register PIXEL *pp;                                 \
     register unsigned int s,t,z,zz;                     \
     register int n,dsdx,dtdx;                           \
@@ -552,8 +552,8 @@ void FNAME(ZB_fillTriangleMappingPerspectiveSmooth) (ZBuffer *zb,
         float ss,tt;                                    \
         ss=(sz * zinv);                                 \
         tt=(tz * zinv);                                 \
-        s=(int) ss;                                     \
+        s=(unsigned int) ss;                                     \
-        t=(int) tt;                                     \
+        t=(unsigned int) tt;                                     \
         dsdx= (int)( (dszdx - ss*fdzdx)*zinv );         \
         dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );         \
         fz+=fndzdx;                                     \
@@ -577,8 +577,8 @@ void FNAME(ZB_fillTriangleMappingPerspectiveSmooth) (ZBuffer *zb,
       float ss,tt;                                      \
       ss=(sz * zinv);                                   \
       tt=(tz * zinv);                                   \
-      s=(int) ss;                                       \
+      s=(unsigned int) ss;                                       \
-      t=(int) tt;                                       \
+      t=(unsigned int) tt;                                       \
       dsdx= (int)( (dszdx - ss*fdzdx)*zinv );           \
       dtdx= (int)( (dtzdx - tt*fdzdx)*zinv );           \
     }                                                   \