1 ;

     2 ; x86 format converters for HERMES

     3 ; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)

     4 ; This source code is licensed under the GNU LGPL

     5 ; 

     6 ; Please refer to the file COPYING.LIB contained in the distribution for

     7 ; licensing conditions		

     8 ;

     9 ; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission

    10 ; 

    11 

    12 BITS 32

    13 

    14 %include "common.inc"

    15 

    16 SDL_FUNC _ConvertX86

    17 

    18 SECTION .text

    19 		

    20 ;; _ConvertX86:	 

    21 ;; [ESP+8] ConverterInfo*

    22 ;; --------------------------------------------------------------------------

    23 ;; ConverterInfo (ebp+..)

    24 ;;   0:	void *s_pixels

    25 ;;   4:	int s_width

    26 ;;   8:	int s_height

    27 ;;  12:	int s_add

    28 ;;  16:	void *d_pixels

    29 ;;  20:	int d_width

    30 ;;  24:	int d_height

    31 ;;  28:	int d_add

    32 ;;  32:	void (*converter_function)() 

    33 ;;  36: int32 *lookup

    34 	

    35 _ConvertX86:

    36 	push ebp

    37 	mov ebp,esp

    38 

    39 ; Save the registers used by the blitters, necessary for optimized code

    40 	pusha

    41 

    42 	mov eax,[ebp+8]

    43 

    44         cmp dword [eax+4],BYTE 0

    45 	je endconvert

    46 	

    47 	mov ebp,eax

    48 	

    49 	mov esi,[ebp+0]

    50 	mov edi,[ebp+16]

    51 	

    52 y_loop:	

    53 	mov ecx,[ebp+4]

    54 

    55 	call [ebp+32]

    56 

    57 	add esi,[ebp+12]

    58 	add edi,[ebp+28]

    59 	

    60 	dec dword  [ebp+8]

    61 	jnz y_loop

    62 

    63 ; Restore the registers used by the blitters, necessary for optimized code

    64 	popa

    65 	

    66 	pop ebp

    67 

    68 endconvert:	

    69 	ret		

    70 

    71 

    72 

    73 %ifidn __OUTPUT_FORMAT__,elf

    74 section .note.GNU-stack noalloc noexec nowrite progbits

    75 %endif