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/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/r128_cursor.c,v 1.6 2003/02/13 20:28:40 tsi Exp $ */
/*
* Copyright 1999, 2000 ATI Technologies Inc., Markham, Ontario,
* Precision Insight, Inc., Cedar Park, Texas, and
* VA Linux Systems Inc., Fremont, California.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL ATI, PRECISION INSIGHT, VA LINUX
* SYSTEMS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Authors:
* Rickard E. Faith <faith@valinux.com>
* Kevin E. Martin <martin@valinux.com>
*
* References:
*
* RAGE 128 VR/ RAGE 128 GL Register Reference Manual (Technical
* Reference Manual P/N RRG-G04100-C Rev. 0.04), ATI Technologies: April
* 1999.
*
* RAGE 128 Software Development Manual (Technical Reference Manual P/N
* SDK-G04000 Rev. 0.01), ATI Technologies: June 1999.
*
*/
/* Driver data structures */
#include "r128.h"
#include "r128_reg.h"
/* X and server generic header files */
#include "xf86.h"
#if X_BYTE_ORDER == X_BIG_ENDIAN
#define P_SWAP32( a , b ) \
((char *)a)[0] = ((char *)b)[3]; \
((char *)a)[1] = ((char *)b)[2]; \
((char *)a)[2] = ((char *)b)[1]; \
((char *)a)[3] = ((char *)b)[0]
#define P_SWAP16( a , b ) \
((char *)a)[0] = ((char *)b)[1]; \
((char *)a)[1] = ((char *)b)[0]; \
((char *)a)[2] = ((char *)b)[3]; \
((char *)a)[3] = ((char *)b)[2]
#endif
/* Set cursor foreground and background colors. */
static void R128SetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
{
R128InfoPtr info = R128PTR(pScrn);
unsigned char *R128MMIO = info->MMIO;
OUTREG(R128_CUR_CLR0, bg);
OUTREG(R128_CUR_CLR1, fg);
}
/* Set cursor position to (x,y) with offset into cursor bitmap at
(xorigin,yorigin). */
static void R128SetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
{
R128InfoPtr info = R128PTR(pScrn);
unsigned char *R128MMIO = info->MMIO;
xf86CursorInfoPtr cursor = info->cursor;
int xorigin = 0;
int yorigin = 0;
int total_y = pScrn->frameY1 - pScrn->frameY0;
if (x < 0) xorigin = -x;
if (y < 0) yorigin = -y;
if (y > total_y) y = total_y;
if (info->Flags & V_DBLSCAN) y *= 2;
if (xorigin >= cursor->MaxWidth) xorigin = cursor->MaxWidth - 1;
if (yorigin >= cursor->MaxHeight) yorigin = cursor->MaxHeight - 1;
OUTREG(R128_CUR_HORZ_VERT_OFF, R128_CUR_LOCK | (xorigin << 16) | yorigin);
OUTREG(R128_CUR_HORZ_VERT_POSN, (R128_CUR_LOCK
| ((xorigin ? 0 : x) << 16)
| (yorigin ? 0 : y)));
OUTREG(R128_CUR_OFFSET, info->cursor_start + yorigin * 16);
}
/* Copy cursor image from `image' to video memory. R128SetCursorPosition
will be called after this, so we can ignore xorigin and yorigin. */
static void R128LoadCursorImage(ScrnInfoPtr pScrn, unsigned char *image)
{
R128InfoPtr info = R128PTR(pScrn);
unsigned char *R128MMIO = info->MMIO;
CARD32 *s = (pointer)image;
CARD32 *d = (pointer)(info->FB + info->cursor_start);
int y;
CARD32 save;
save = INREG(R128_CRTC_GEN_CNTL);
OUTREG(R128_CRTC_GEN_CNTL, save & (CARD32)~R128_CRTC_CUR_EN);
#if X_BYTE_ORDER == X_BIG_ENDIAN
switch(info->CurrentLayout.pixel_bytes) {
case 4:
case 3:
for (y = 0; y < 64; y++) {
P_SWAP32(d,s);
d++; s++;
P_SWAP32(d,s);
d++; s++;
P_SWAP32(d,s);
d++; s++;
P_SWAP32(d,s);
d++; s++;
}
break;
case 2:
for (y = 0; y < 64; y++) {
P_SWAP16(d,s);
d++; s++;
P_SWAP16(d,s);
d++; s++;
P_SWAP16(d,s);
d++; s++;
P_SWAP16(d,s);
d++; s++;
}
break;
default:
for (y = 0; y < 64; y++) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
}
}
#else
for (y = 0; y < 64; y++) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
}
#endif
/* Set the area after the cursor to be all transparent so that we
won't display corrupted cursors on the screen */
for (y = 0; y < 64; y++) {
*d++ = 0xffffffff; /* The AND bits */
*d++ = 0xffffffff;
*d++ = 0x00000000; /* The XOR bits */
*d++ = 0x00000000;
}
OUTREG(R128_CRTC_GEN_CNTL, save);
}
/* Hide hardware cursor. */
static void R128HideCursor(ScrnInfoPtr pScrn)
{
R128InfoPtr info = R128PTR(pScrn);
unsigned char *R128MMIO = info->MMIO;
OUTREGP(R128_CRTC_GEN_CNTL, 0, ~R128_CRTC_CUR_EN);
}
/* Show hardware cursor. */
static void R128ShowCursor(ScrnInfoPtr pScrn)
{
R128InfoPtr info = R128PTR(pScrn);
unsigned char *R128MMIO = info->MMIO;
OUTREGP(R128_CRTC_GEN_CNTL, R128_CRTC_CUR_EN, ~R128_CRTC_CUR_EN);
}
/* Determine if hardware cursor is in use. */
static Bool R128UseHWCursor(ScreenPtr pScreen, CursorPtr pCurs)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
R128InfoPtr info = R128PTR(pScrn);
return info->cursor_start ? TRUE : FALSE;
}
/* Initialize hardware cursor support. */
Bool R128CursorInit(ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
R128InfoPtr info = R128PTR(pScrn);
xf86CursorInfoPtr cursor;
FBAreaPtr fbarea;
int width;
int height;
int size;
if (!(cursor = info->cursor = xf86CreateCursorInfoRec())) return FALSE;
cursor->MaxWidth = 64;
cursor->MaxHeight = 64;
cursor->Flags = (HARDWARE_CURSOR_TRUECOLOR_AT_8BPP
| HARDWARE_CURSOR_SHOW_TRANSPARENT
| HARDWARE_CURSOR_UPDATE_UNHIDDEN
#if X_BYTE_ORDER == X_LITTLE_ENDIAN
| HARDWARE_CURSOR_BIT_ORDER_MSBFIRST
#endif
| HARDWARE_CURSOR_INVERT_MASK
| HARDWARE_CURSOR_AND_SOURCE_WITH_MASK
| HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_64
| HARDWARE_CURSOR_SWAP_SOURCE_AND_MASK);
cursor->SetCursorColors = R128SetCursorColors;
cursor->SetCursorPosition = R128SetCursorPosition;
cursor->LoadCursorImage = R128LoadCursorImage;
cursor->HideCursor = R128HideCursor;
cursor->ShowCursor = R128ShowCursor;
cursor->UseHWCursor = R128UseHWCursor;
size = (cursor->MaxWidth/4) * cursor->MaxHeight;
width = pScrn->displayWidth;
height = (size*2 + 1023) / pScrn->displayWidth;
fbarea = xf86AllocateOffscreenArea(pScreen,
width,
height,
16,
NULL,
NULL,
NULL);
if (!fbarea) {
info->cursor_start = 0;
xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
"Hardware cursor disabled"
" due to insufficient offscreen memory\n");
} else {
info->cursor_start = R128_ALIGN((fbarea->box.x1
+ width * fbarea->box.y1)
* info->CurrentLayout.pixel_bytes, 16);
info->cursor_end = info->cursor_start + size;
}
R128TRACE(("R128CursorInit (0x%08x-0x%08x)\n",
info->cursor_start, info->cursor_end));
return xf86InitCursor(pScreen, cursor);
}
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