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|
/* ______ ___ ___
* /\ _ \ /\_ \ /\_ \
* \ \ \L\ \\//\ \ \//\ \ __ __ _ __ ___
* \ \ __ \ \ \ \ \ \ \ /'__`\ /'_ `\/\`'__\/ __`\
* \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \
* \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/
* \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/
* /\____/
* \_/__/
*
* Asm functions for Windows bitmap locking.
*
* By Isaac Cruz.
*
* Improved dirty rectangles mechanism by Eric Botcazou.
*
* See readme.txt for copyright information.
*/
#include "src/i386/asmdefs.inc"
.text
/* gfx_directx_write_bank:
* edx = bitmap
* eax = line
*/
FUNC (gfx_directx_write_bank)
/* check whether bitmap is already locked */
testl $BMP_ID_LOCKED, BMP_ID(%edx)
jnz Locked
/* lock the surface */
pushl %ecx
pushl %eax
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_directx_autolock)
popl %edx
popl %edx
popl %eax
popl %ecx
Locked:
/* get pointer to the video memory */
movl BMP_LINE(%edx,%eax,4), %eax
ret
/* gfx_directx_unwrite_bank:
* edx = bmp
*/
FUNC (gfx_directx_unwrite_bank)
/* only unlock bitmaps that were autolocked */
testl $BMP_ID_AUTOLOCK, BMP_ID(%edx)
jz No_unlock
/* unlock surface */
pushl %ecx
pushl %eax
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_directx_unlock)
popl %edx
popl %edx
popl %eax
popl %ecx
/* clear the autolock flag */
andl $~BMP_ID_AUTOLOCK, BMP_ID(%edx)
No_unlock:
ret
/* gfx_directx_write_bank_win:
* edx = bitmap
* eax = line
*/
FUNC (gfx_directx_write_bank_win)
pushl %ecx
/* clobber the line */
movl GLOBL(wd_dirty_lines), %ecx
addl BMP_YOFFSET(%edx), %ecx
movb $1, (%ecx,%eax) /* wd_dirty_lines[line] = 1; (line has changed) */
/* check whether bitmap is already locked */
testl $BMP_ID_LOCKED, BMP_ID(%edx)
jnz Locked_win
/* lock the surface */
pushl %eax
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_directx_autolock)
popl %edx
popl %edx
popl %eax
Locked_win:
popl %ecx
/* get pointer to the video memory */
movl BMP_LINE(%edx,%eax,4), %eax
ret
/* gfx_directx_unwrite_bank_win:
* edx = bmp
*/
FUNC (gfx_directx_unwrite_bank_win)
/* only unlock bitmaps that were autolocked */
testl $BMP_ID_AUTOLOCK, BMP_ID(%edx)
jz No_unlock_win
pushl %ecx
pushl %eax
/* unlock surface */
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_directx_unlock)
popl %edx
popl %edx
/* clear the autolock flag */
andl $~BMP_ID_AUTOLOCK, BMP_ID(%edx)
/* update dirty lines: this is safe because autolocking
* is guaranteed to be the only level of locking.
*/
movl GLOBL(forefront_bitmap), %edx
call update_dirty_lines
popl %eax
popl %ecx
No_unlock_win:
ret
/* gfx_directx_unlock_win:
* arg1 = bmp
*/
FUNC(gfx_directx_unlock_win)
/* unlock surface */
movl 4(%esp), %edx
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_directx_unlock)
popl %edx
popl %edx
/* forefront_bitmap may still be locked in case of nested locking */
movl GLOBL(forefront_bitmap), %edx
testl $BMP_ID_LOCKED, BMP_ID(%edx)
jnz No_update_win
/* ok, we can safely update */
call update_dirty_lines
No_update_win:
ret
/* update_dirty_lines
* edx = dd_frontbuffer
* clobbers: %eax, %ecx
*/
#define RECT_LEFT (%esp)
#define RECT_TOP 4(%esp)
#define RECT_RIGHT 8(%esp)
#define RECT_BOTTOM 12(%esp)
update_dirty_lines:
pushl %ebx
pushl %esi
pushl %edi
subl $16, %esp /* allocate a RECT structure */
movl $0, RECT_LEFT
movl BMP_W(%edx), %ecx /* ecx = dd_frontbuffer->w */
movl %ecx, RECT_RIGHT
movl GLOBL(wd_dirty_lines), %ebx /* ebx = wd_dirty_lines */
movl BMP_H(%edx), %esi /* esi = dd_frontbuffer->h */
movl $0, %edi
_align_
next_line:
movb (%ebx,%edi), %al /* al = wd_dirty_lines[edi] */
testb %al, %al /* is dirty? */
jz test_end /* no ! */
movl %edi, RECT_TOP
_align_
loop_dirty_lines:
movb $0, (%ebx,%edi) /* wd_dirty_lines[edi] = 0 */
incl %edi
movb (%ebx,%edi), %al /* al = wd_dirty_lines[edi] */
testb %al, %al /* is still dirty? */
jnz loop_dirty_lines /* yes ! */
movl %edi, RECT_BOTTOM
leal RECT_LEFT, %eax
pushl %eax
call *GLOBL(update_window)
popl %eax
_align_
test_end:
incl %edi
cmpl %edi, %esi /* last line? */
jge next_line /* no ! */
addl $16, %esp
popl %edi
popl %esi
popl %ebx
ret
/* gfx_gdi_write_bank:
* edx = bitmap
* eax = line
*/
FUNC (gfx_gdi_write_bank)
pushl %ecx
/* clobber the line */
movl GLOBL(gdi_dirty_lines), %ecx
addl BMP_YOFFSET(%edx), %ecx
movb $1, (%ecx,%eax) /* gdi_dirty_lines[line] = 1; (line has changed) */
/* check whether bitmap is already locked */
testl $BMP_ID_LOCKED, BMP_ID(%edx)
jnz Locked_gdi
/* lock the surface */
pushl %eax
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_gdi_autolock)
popl %edx
popl %edx
popl %eax
Locked_gdi:
popl %ecx
/* get pointer to the video memory */
movl BMP_LINE(%edx,%eax,4), %eax
ret
/* gfx_gdi_unwrite_bank:
* edx = bmp
*/
FUNC (gfx_gdi_unwrite_bank)
/* only unlock bitmaps that were autolocked */
testl $BMP_ID_AUTOLOCK, BMP_ID(%edx)
jz No_unlock_gdi
/* unlock surface */
pushl %ecx
pushl %eax
pushl %edx
pushl %edx /* argument */
call *GLOBL(ptr_gfx_gdi_unlock)
popl %edx
popl %edx
popl %eax
popl %ecx
/* clear the autolock flag */
andl $~BMP_ID_AUTOLOCK, BMP_ID(%edx)
No_unlock_gdi:
ret
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