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Date: Fri, 13 Feb 2004 17:03:16 +0100 From: Max Horn Subject: Modifier key fix The internal modifier state can get out of sync with reality. To trigger this, do for example this: 1) Launch an SDL app 2) Alt-click on the desktop (this will hide the SDL app). 3) Bring the SDL app back to the front 4) SDL will still think alt is pressed (and as such will treat left clicks like middle clicks). If you press and release alt, it'll be fine again. The attached patch cures this by rechecking the modifier state whenever we process an event.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 13 Feb 2004 17:57:16 +0000
parents 77b6110c797d
children da33b7e6d181
line wrap: on
line source

;
; pII-optimised MMX format converters for HERMES
; Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
;   and (c) 1999 Jonathan Matthew (jmatthew@uq.net.au)
; This source code is licensed under the GNU LGPL
; 
; Please refer to the file COPYING.LIB contained in the distribution for
; licensing conditions		
;
; COPYRIGHT NOTICE
; 
; This file partly contains code that is (c) Intel Corporation, specifically
; the mode detection routine, and the converter to 15 bit (8 pixel
; conversion routine from the mmx programming tutorial pages).
;
;
; These routines aren't exactly pII optimised - it's just that as they
; are, they're terrible on p5 MMXs, but less so on pIIs.  Someone needs to
; optimise them for p5 MMXs..

BITS 32

	
GLOBAL _ConvertMMXpII32_24RGB888
GLOBAL _ConvertMMXpII32_16RGB565
GLOBAL _ConvertMMXpII32_16BGR565
GLOBAL _ConvertMMXpII32_16RGB555
GLOBAL _ConvertMMXpII32_16BGR555

EXTERN _mmxreturn
 
SECTION .data
	
ALIGN 8

;; Constants for conversion routines

mmx32_rgb888_mask dd 00ffffffh,00ffffffh

mmx32_rgb565_b dd 000000f8h, 000000f8h
mmx32_rgb565_g dd 0000fc00h, 0000fc00h
mmx32_rgb565_r dd 00f80000h, 00f80000h

mmx32_rgb555_rb dd 00f800f8h,00f800f8h
mmx32_rgb555_g dd 0000f800h,0000f800h
mmx32_rgb555_mul dd 20000008h,20000008h
mmx32_bgr555_mul dd 00082000h,00082000h


			
SECTION .text

_ConvertMMXpII32_24RGB888:

        ; set up mm6 as the mask, mm7 as zero
        movq mm6, qword [mmx32_rgb888_mask]
        pxor mm7, mm7

        mov edx, ecx                    ; save ecx
        and ecx, 0fffffffch             ; clear lower two bits
        jnz .L1
        jmp .L2

.L1:

        movq mm0, [esi]                 ; A R G B a r g b
        pand mm0, mm6                   ; 0 R G B 0 r g b
        movq mm1, [esi+8]               ; A R G B a r g b
        pand mm1, mm6                   ; 0 R G B 0 r g b

        movq mm2, mm0                   ; 0 R G B 0 r g b
        punpckhdq mm2, mm7              ; 0 0 0 0 0 R G B
        punpckldq mm0, mm7              ; 0 0 0 0 0 r g b
        psllq mm2, 24                   ; 0 0 R G B 0 0 0
        por mm0, mm2                    ; 0 0 R G B r g b

        movq mm3, mm1                   ; 0 R G B 0 r g b
        psllq mm3, 48                   ; g b 0 0 0 0 0 0
        por mm0, mm3                    ; g b R G B r g b

        movq mm4, mm1                   ; 0 R G B 0 r g b
        punpckhdq mm4, mm7              ; 0 0 0 0 0 R G B
        punpckldq mm1, mm7              ; 0 0 0 0 0 r g b
        psrlq mm1, 16                   ; 0 0 0 R G B 0 r
        psllq mm4, 8                    ; 0 0 0 0 R G B 0
        por mm1, mm4                    ; 0 0 0 0 R G B r

        movq [edi], mm0
        add esi, BYTE 16
        movd [edi+8], mm1
        add edi, BYTE 12
        sub ecx, BYTE 4
        jnz .L1

.L2:
        mov ecx, edx
        and ecx, BYTE 3
        jz .L4
.L3:
        mov al, [esi]
        mov bl, [esi+1]
        mov dl, [esi+2]
        mov [edi], al
        mov [edi+1], bl
        mov [edi+2], dl
        add esi, BYTE 4
        add edi, BYTE 3
        dec ecx
        jnz .L3
.L4:
        jmp _mmxreturn



_ConvertMMXpII32_16RGB565:

        ; set up masks
        movq mm5, [mmx32_rgb565_b]
        movq mm6, [mmx32_rgb565_g]
        movq mm7, [mmx32_rgb565_r]

        mov edx, ecx
        shr ecx, 2
        jnz .L1
        jmp .L2         ; not necessary at the moment, but doesn't hurt (much)

.L1:
        movq mm0, [esi]         ; argb
        movq mm1, mm0           ; argb
        pand mm0, mm6           ; 00g0
        movq mm3, mm1           ; argb
        pand mm1, mm5           ; 000b
        pand mm3, mm7           ; 0r00
        pslld mm1, 2            ; 0 0 000000bb bbb00000
        por mm0, mm1            ; 0 0 ggggggbb bbb00000
        psrld mm0, 5            ; 0 0 00000ggg gggbbbbb

        movq mm4, [esi+8]       ; argb
        movq mm2, mm4           ; argb
        pand mm4, mm6           ; 00g0
        movq mm1, mm2           ; argb
        pand mm2, mm5           ; 000b
        pand mm1, mm7           ; 0r00
        pslld mm2, 2            ; 0 0 000000bb bbb00000
        por mm4, mm2            ; 0 0 ggggggbb bbb00000
        psrld mm4, 5            ; 0 0 00000ggg gggbbbbb

        packuswb mm3, mm1       ; R 0 r 0
        packssdw mm0, mm4       ; as above.. ish
        por mm0, mm3            ; done.
        movq [edi], mm0

        add esi, 16
        add edi, 8
        dec ecx
        jnz .L1

.L2:
        mov ecx, edx
        and ecx, BYTE 3
        jz .L4
.L3:
        mov al, [esi]
        mov bh, [esi+1]
        mov ah, [esi+2]
        shr al, 3
        and eax, 0F81Fh            ; BYTE?
        shr ebx, 5
        and ebx, 07E0h             ; BYTE?
        add eax, ebx
        mov [edi], al
        mov [edi+1], ah
        add esi, BYTE 4
        add edi, BYTE 2
        dec ecx
        jnz .L3

.L4:
	jmp _mmxreturn

	
_ConvertMMXpII32_16BGR565:

        movq mm5, [mmx32_rgb565_r]
        movq mm6, [mmx32_rgb565_g]
        movq mm7, [mmx32_rgb565_b]

        mov edx, ecx
        shr ecx, 2
        jnz .L1
        jmp .L2

.L1:
        movq mm0, [esi]                 ; a r g b
        movq mm1, mm0                   ; a r g b
        pand mm0, mm6                   ; 0 0 g 0
        movq mm3, mm1                   ; a r g b
        pand mm1, mm5                   ; 0 r 0 0
        pand mm3, mm7                   ; 0 0 0 b

        psllq mm3, 16                   ; 0 b 0 0
        psrld mm1, 14                   ; 0 0 000000rr rrr00000
        por mm0, mm1                    ; 0 0 ggggggrr rrr00000
        psrld mm0, 5                    ; 0 0 00000ggg gggrrrrr

        movq mm4, [esi+8]               ; a r g b
        movq mm2, mm4                   ; a r g b
        pand mm4, mm6                   ; 0 0 g 0
        movq mm1, mm2                   ; a r g b
        pand mm2, mm5                   ; 0 r 0 0
        pand mm1, mm7                   ; 0 0 0 b

        psllq mm1, 16                   ; 0 b 0 0
        psrld mm2, 14                   ; 0 0 000000rr rrr00000
        por mm4, mm2                    ; 0 0 ggggggrr rrr00000
        psrld mm4, 5                    ; 0 0 00000ggg gggrrrrr

        packuswb mm3, mm1               ; BBBBB000 00000000 bbbbb000 00000000
        packssdw mm0, mm4               ; 00000GGG GGGRRRRR 00000GGG GGGRRRRR
        por mm0, mm3                    ; BBBBBGGG GGGRRRRR bbbbbggg gggrrrrr
        movq [edi], mm0

        add esi, BYTE 16
        add edi, BYTE 8
        dec ecx
        jnz .L1

.L2:
        and edx, BYTE 3
        jz .L4
.L3:
        mov al, [esi+2]
        mov bh, [esi+1]
        mov ah, [esi]
        shr al, 3
        and eax, 0F81Fh                    ; BYTE ?
        shr ebx, 5
        and ebx, 07E0h                     ; BYTE ?
        add eax, ebx
        mov [edi], al
        mov [edi+1], ah
        add esi, BYTE 4
        add edi, BYTE 2
        dec edx
        jnz .L3

.L4:
        jmp _mmxreturn

_ConvertMMXpII32_16BGR555:

        ; the 16BGR555 converter is identical to the RGB555 one,
        ; except it uses a different multiplier for the pmaddwd
        ; instruction.  cool huh.

        movq mm7, qword [mmx32_bgr555_mul]
        jmp _convert_bgr555_cheat

; This is the same as the Intel version.. they obviously went to
; much more trouble to expand/coil the loop than I did, so theirs
; would almost certainly be faster, even if only a little.
; I did rename 'mmx32_rgb555_add' to 'mmx32_rgb555_mul', which is
; (I think) a more accurate name..
_ConvertMMXpII32_16RGB555:

        movq mm7,qword [mmx32_rgb555_mul]
_convert_bgr555_cheat:
        movq mm6,qword [mmx32_rgb555_g]
        
	mov edx,ecx		           ; Save ecx 

        and ecx,BYTE 0fffffff8h            ; clear lower three bits
	jnz .L_OK
        jmp near .L2 

.L_OK:
	
	movq mm2,[esi+8]

	movq mm0,[esi]
	movq mm3,mm2

	pand mm3,qword [mmx32_rgb555_rb]
	movq mm1,mm0

	pand mm1,qword [mmx32_rgb555_rb]
	pmaddwd mm3,mm7

	pmaddwd mm1,mm7
	pand mm2,mm6

.L1:
	movq mm4,[esi+24]
	pand mm0,mm6

	movq mm5,[esi+16]
	por mm3,mm2

	psrld mm3,6
	por mm1,mm0

	movq mm0,mm4
	psrld mm1,6

	pand mm0,qword [mmx32_rgb555_rb]
	packssdw mm1,mm3

	movq mm3,mm5
	pmaddwd mm0,mm7

	pand mm3,qword [mmx32_rgb555_rb]
	pand mm4,mm6

	movq [edi],mm1			
	pmaddwd mm3,mm7

        add esi,BYTE 32
	por mm4,mm0

	pand mm5,mm6
	psrld mm4,6

	movq mm2,[esi+8]
	por mm5,mm3

	movq mm0,[esi]
	psrld mm5,6

	movq mm3,mm2
	movq mm1,mm0

	pand mm3,qword [mmx32_rgb555_rb]
	packssdw mm5,mm4

	pand mm1,qword [mmx32_rgb555_rb]
	pand mm2,mm6

	movq [edi+8],mm5
	pmaddwd mm3,mm7

	pmaddwd mm1,mm7
        add edi,BYTE 16
	
        sub ecx,BYTE 8
	jz .L2
        jmp .L1


.L2:	
	mov ecx,edx
	
        and ecx,BYTE 7
	jz .L4
	
.L3:	
	mov ebx,[esi]
        add esi,BYTE 4
	
        mov eax,ebx
        mov edx,ebx

        shr eax,3
        shr edx,6

        and eax,BYTE 0000000000011111b
        and edx,     0000001111100000b

        shr ebx,9

        or eax,edx

        and ebx,     0111110000000000b

        or eax,ebx

        mov [edi],ax
        add edi,BYTE 2

	dec ecx
	jnz .L3	

.L4:		
	jmp _mmxreturn