Added support for cursor palettes.

svn-id: r19100

3 files changed, 32 insertions, 4 deletions

diff --git a/backends/dc/dc.h b/backends/dc/dc.h
index b385891168..3ceec6aa09 100644
--- a/backends/dc/dc.h
+++ b/backends/dc/dc.h
@@ -94,6 +94,12 @@ class OSystem_Dreamcast : public OSystem {
   // Set the bitmap that's used when drawing the cursor.
   void setMouseCursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y, byte keycolor, int cursorTargetScale);
 
+  // Replace the specified range of cursor the palette with new colors.
+  void setCursorPalette(const byte *colors, uint start, uint num);
+
+  // Disable or enable cursor palette.
+  void disableCursorPalette(bool disable);
+
   // Shaking is used in SCUMM. Set current shake position.
   void setShakePos(int shake_pos);
 
@@ -198,7 +204,7 @@ class OSystem_Dreamcast : public OSystem {
   void *_sound_proc_param;
   bool _overlay_visible, _overlay_dirty, _screen_dirty;
   int _screen_buffer, _overlay_buffer, _mouse_buffer;
-  bool _aspect_stretch, _softkbd_on;
+  bool _aspect_stretch, _softkbd_on, _enable_cursor_palette;
   float _overlay_fade, _xscale, _yscale, _top_offset;
   int _softkbd_motion;
 
@@ -212,7 +218,7 @@ class OSystem_Dreamcast : public OSystem {
   void *screen_tx[NUM_BUFFERS];
   void *mouse_tx[NUM_BUFFERS];
   void *ovl_tx[NUM_BUFFERS];
-  unsigned short palette[256];
+  unsigned short palette[256], cursor_palette[256];
 
   int temp_sound_buffer[RING_BUFFER_SAMPLES>>SOUND_BUFFER_SHIFT];
 
diff --git a/backends/dc/dcmain.cpp b/backends/dc/dcmain.cpp
index 132b11915e..6371ff5ff0 100644
--- a/backends/dc/dcmain.cpp
+++ b/backends/dc/dcmain.cpp
@@ -49,7 +49,8 @@ OSystem *OSystem_Dreamcast::create() {
 OSystem_Dreamcast::OSystem_Dreamcast()
   : screen(NULL), mouse(NULL), overlay(NULL), _softkbd(this), _ms_buf(NULL),
     _sound_proc(NULL), _timer_active(false), _current_shake_pos(0),
-    _aspect_stretch(false), _softkbd_on(false), _softkbd_motion(0)
+    _aspect_stretch(false), _softkbd_on(false), _softkbd_motion(0),
+    _enable_cursor_palette(false)
 {
   memset(screen_tx, 0, sizeof(screen_tx));
   memset(mouse_tx, 0, sizeof(mouse_tx));
@@ -153,6 +154,7 @@ bool OSystem_Dreamcast::hasFeature(Feature f)
   case kFeatureAspectRatioCorrection:
   case kFeatureVirtualKeyboard:
   case kFeatureOverlaySupportsAlpha:
+  case kFeatureCursorHasPalette:
     return true;
   default:
     return false;
diff --git a/backends/dc/display.cpp b/backends/dc/display.cpp
index b9880a7d98..1161f60e9f 100644
--- a/backends/dc/display.cpp
+++ b/backends/dc/display.cpp
@@ -144,6 +144,24 @@ void OSystem_Dreamcast::setPalette(const byte *colors, uint start, uint num)
   _screen_dirty = true;
 }
 
+void OSystem_Dreamcast::setCursorPalette(const byte *colors, uint start, uint num)
+{
+  unsigned short *dst = cursor_palette + start;
+  if(num>0)
+    while( num-- ) {
+      *dst++ = ((colors[0]<<7)&0x7c00)|
+	((colors[1]<<2)&0x03e0)|
+	((colors[2]>>3)&0x001f);
+      colors += 4;
+    }
+  _enable_cursor_palette = true;
+}
+
+void OSystem_Dreamcast::disableCursorPalette(bool disable)
+{
+  _enable_cursor_palette = !disable;  
+}
+
 void OSystem_Dreamcast::grabPalette(byte *colors, uint start, uint num)
 {
   const unsigned short *src = palette + start;
@@ -436,6 +454,8 @@ void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
   struct polygon_list mypoly;
   struct packed_colour_vertex_list myvertex;
 
+  unsigned short *pal = _enable_cursor_palette? cursor_palette : palette;
+
   _mouse_buffer++;
   _mouse_buffer &= NUM_BUFFERS-1;
 
@@ -450,7 +470,7 @@ void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
 	  *dst++ = 0;
 	  buf++;
 	} else
-	  *dst++ = palette[*buf++]|0x8000;
+	  *dst++ = pal[*buf++]|0x8000;
       dst += MOUSE_W-x;
     }
   else {