X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Modules%2FDisplay%2FVESA%2Fmain.c;h=ff9e514969ca3468b21bd5cbdacd458a3c0b294e;hb=320aba7c7d009697ba5e51ac684722b56d696bea;hp=d3beb1f7011c5723730b5b3b417a6f478fce7f6c;hpb=3d60a5678de7186015ad1a2461c15fcac6b1e898;p=tpg%2Facess2.git

diff --git a/Modules/Display/VESA/main.c b/Modules/Display/VESA/main.c
index d3beb1f7..ff9e5149 100644
--- a/Modules/Display/VESA/main.c
+++ b/Modules/Display/VESA/main.c
@@ -16,6 +16,10 @@
 // === CONSTANTS ===
 #define	FLAG_LFB	0x1
 #define VESA_DEFAULT_FRAMEBUFFER	(KERNEL_BASE|0xA0000)
+#define BLINKING_CURSOR	1
+#if BLINKING_CURSOR
+# define VESA_CURSOR_PERIOD	1000
+#endif
 
 // === PROTOTYPES ===
  int	Vesa_Install(char **Arguments);
@@ -25,6 +29,7 @@ Uint64	Vesa_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  int	Vesa_Int_SetMode(int Mode);
  int	Vesa_Int_FindMode(tVideo_IOCtl_Mode *data);
  int	Vesa_Int_ModeInfo(tVideo_IOCtl_Mode *data);
+void	Vesa_FlipCursor(void *Arg);
 // --- 2D Acceleration Functions --
 void	Vesa_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour);
 void	Vesa_2D_Blit(void *Ent, Uint16 DstX, Uint16 DstY, Uint16 SrcX, Uint16 SrcY, Uint16 W, Uint16 H);
@@ -41,13 +46,21 @@ tDevFS_Driver	gVesa_DriverStruct = {
 };
 tSpinlock	glVesa_Lock;
 tVM8086	*gpVesa_BiosState;
+ int	giVesaDriverId = -1;
+// --- Video Modes ---
  int	giVesaCurrentMode = 0;
  int	giVesaCurrentFormat = VIDEO_BUFFMT_TEXT;
- int	giVesaDriverId = -1;
-char	*gpVesa_Framebuffer = (void*)VESA_DEFAULT_FRAMEBUFFER;
 tVesa_Mode	*gVesa_Modes;
+tVesa_Mode	*gpVesaCurMode;
  int	giVesaModeCount = 0;
- int	giVesaPageCount = 0;
+// --- Framebuffer ---
+char	*gpVesa_Framebuffer = (void*)VESA_DEFAULT_FRAMEBUFFER;
+ int	giVesaPageCount = 0;	//!< Framebuffer size in pages
+// --- Cursor Control ---
+ int	giVesaCursorX = -1;
+ int	giVesaCursorY = -1;
+ int	giVesaCursorTimer = -1;	// Invalid timer
+// --- 2D Video Stream Handlers ---
 tDrvUtil_Video_2DHandlers	gVesa_2DFunctions = {
 	NULL,
 	Vesa_2D_Fill,
@@ -240,12 +253,17 @@ Uint64 Vesa_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 			);
 		
 		// Sanity Check
+		if( Offset > (Uint64)(heightInChars*widthInChars) ) {
+			LEAVE('i', 0);
+			return 0;
+		}
 		if(y >= heightInChars) {
 			LEAVE('i', 0);
 			return 0;
 		}
 		
-		if( Offset + Length > heightInChars*widthInChars ) {
+		
+		if( (int)Offset + (int)Length > heightInChars*widthInChars ) {
 			Log_Debug("VESA", "%i + %i > %i*%i (%i)",
 				(int)Offset, (int)Length, heightInChars, widthInChars, heightInChars*widthInChars);
 			Length = heightInChars*widthInChars - Offset;
@@ -257,7 +275,7 @@ Uint64 Vesa_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 		
 		LOG("dest = %p", dest);
 		
-		for( i = 0; i < Length; i++ )
+		for( i = 0; i < (int)Length; i++ )
 		{
 			VT_Font_Render(
 				chars->Ch,
@@ -348,6 +366,37 @@ int Vesa_Ioctl(tVFS_Node *Node, int ID, void *Data)
 		return ret;
 	
 	case VIDEO_IOCTL_SETCURSOR:	// Set cursor position
+		#if !BLINKING_CURSOR
+		if(giVesaCursorX > 0)
+			Vesa_FlipCursor(Node);
+		#endif
+		giVesaCursorX = ((tVideo_IOCtl_Pos*)Data)->x;
+		giVesaCursorY = ((tVideo_IOCtl_Pos*)Data)->y;
+		//Log_Debug("VESA", "Cursor position (%i,%i)", giVesaCursorX, giVesaCursorY);
+		if(
+			giVesaCursorX < 0 || giVesaCursorY < 0
+		||	giVesaCursorX >= gpVesaCurMode->width/giVT_CharWidth
+		||	giVesaCursorY >= gpVesaCurMode->height/giVT_CharHeight)
+		{
+			#if BLINKING_CURSOR
+			if(giVesaCursorTimer != -1) {
+				Time_RemoveTimer(giVesaCursorTimer);
+				giVesaCursorTimer = -1;
+			}
+			#endif
+			giVesaCursorX = -1;
+			giVesaCursorY = -1;
+		}
+		else {
+			#if BLINKING_CURSOR
+		//	Log_Debug("VESA", "Updating timer %i?", giVesaCursorTimer);
+			if(giVesaCursorTimer == -1)
+				giVesaCursorTimer = Time_CreateTimer(VESA_CURSOR_PERIOD, Vesa_FlipCursor, Node);
+			#else
+			Vesa_FlipCursor(Node);
+			#endif
+		}
+		//Log_Debug("VESA", "Cursor position (%i,%i) Timer %i", giVesaCursorX, giVesaCursorY, giVesaCursorTimer);
 		return 0;
 	
 	case VIDEO_IOCTL_REQLFB:	// Request Linear Framebuffer
@@ -356,6 +405,9 @@ int Vesa_Ioctl(tVFS_Node *Node, int ID, void *Data)
 	return 0;
 }
 
+/**
+ * \brief Updates the video mode
+ */
 int Vesa_Int_SetMode(int mode)
 {
 	Log_Log("VESA", "Setting mode to %i", mode);
@@ -366,6 +418,9 @@ int Vesa_Int_SetMode(int mode)
 	// Check for fast return
 	if(mode == giVesaCurrentMode)	return 1;
 	
+	Time_RemoveTimer(giVesaCursorTimer);
+	giVesaCursorTimer = -1;
+	
 	LOCK( &glVesa_Lock );
 	
 	gpVesa_BiosState->AX = 0x4F02;
@@ -389,6 +444,7 @@ int Vesa_Int_SetMode(int mode)
 	
 	// Record Mode Set
 	giVesaCurrentMode = mode;
+	gpVesaCurMode = &gVesa_Modes[giVesaCurrentMode];
 	
 	RELEASE( &glVesa_Lock );
 	
@@ -446,16 +502,48 @@ int Vesa_Int_ModeInfo(tVideo_IOCtl_Mode *data)
 	return 1;
 }
 
+/**
+ * \brief Updates the state of the text cursor
+ * \note Just does a bitwise not on the cursor region
+ */
+void Vesa_FlipCursor(void *Arg)
+{
+	 int	pitch = gpVesaCurMode->pitch/4;
+	 int	x = giVesaCursorX*giVT_CharWidth;
+	 int	y = giVesaCursorY*giVT_CharHeight;
+	 int	i;
+	Uint32	*fb = (void*)gpVesa_Framebuffer;
+	
+	//Debug("Cursor flip");
+	
+	// Sanity 1
+	if(giVesaCursorX < 0 || giVesaCursorY < 0
+	|| y*pitch + x + giVT_CharHeight*pitch > (int)gpVesaCurMode->fbSize/4) {
+		Debug("Cursor OOB (%i,%i)", x, y);
+		giVesaCursorTimer = -1;
+		return;
+	}
+	
+	// Draw cursor
+	fb += (y+1)*pitch + x;
+	for( i = 1; i < giVT_CharHeight-1; i++, fb += pitch )
+		*fb = ~*fb;
+	
+	#if BLINKING_CURSOR
+	giVesaCursorTimer = Time_CreateTimer(VESA_CURSOR_PERIOD, Vesa_FlipCursor, Arg);
+	#endif
+}
+
 // ------------------------
 // --- 2D Accelleration ---
 // ------------------------
 void Vesa_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour)
 {
-	 int	scrnwidth = gVesa_Modes[giVesaCurrentMode].width;
-	Uint32	*buf = (Uint32*)gpVesa_Framebuffer + Y*scrnwidth + X;
+	 int	pitch = gpVesaCurMode->pitch/4;
+	Uint32	*buf = (Uint32*)gpVesa_Framebuffer + Y*pitch + X;
 	while( H -- ) {
 		memsetd(buf, Colour, W);
-		buf += scrnwidth;
+		buf += pitch;
 	}
 }