WebSVN – Kolibri OS – Blame – /programs/media/jpegview/trunk/jpegview.asm

Rev	Author	Line No.	Line
31	halyavin	1	; IMGVIEW.ASM
		2	;
		3	; This program displays jpeg images. The window can be resized.
		4	;
		5	; Version 0.0 END OF 2003
		6	; Octavio Vega
		7	; Version 0.1 7th March 2004
		8	; Mike Hibbett ( very small part! )
		9	; Version 0.11 7th April 2004
		10	; Ville Turjanmaa ( 'set_as_bgr' function )
		11	; Version 0.12 29th May 2004
		12	; Ivan Poddubny (correct "set_as_bgr"+parameters+boot+...)
		13	; Version 0.12 30 de mayo 2004
		14	; Octavio Vega
		15	; bugs correction and slideshow
		16	; version 0.13 3 de junio 2004
		17	; Octavio Vega
		18	; unos retoques
		19	; version 0.14 10th August 2004
		20	; Mike Hibbett Added setting default colours
		21	;
		22	memsize=20000h
		23	org 0
		24	PARAMS = memsize - 1024
		25
		26	use32
		27
		28	db 'MENUET01' ; 8 byte id
		29	dd 0x01 ; header version
		30	dd START ; start of code
		31	dd I_END ; size of image
		32	dd memsize ; memory for app
		33	dd memsize - 1024 ; esp
		34	dd PARAMS , 0x0 ; I_Param , I_Icon
		35
		36	include 'lang.inc'
		37	stack_size=4096 + 1024
		38
		39
		40	START: ; start of execution
		41
		42	cmp [PARAMS], byte 0
		43	jne check_parameters
		44
		45	; Calculate the 'free' memory available
		46	; to the application, and create the malloc block from it
		47	.l1:
		48	mov ecx,memsize-fin-stack_size
		49	mov edi,fin
		50	call add_mem
		51
		52	; Get some memory
		53	mov ecx,16384
		54	call malloc
		55	mov [work_area],edi
		56	call colorprecalc ;inicializa tablas usadas para pasar de ybr a bgr
		57	call draw_window
		58	call read_string.rs_done
		59
		60	still:
		61	push still
		62	mov ebx,100 ;1 second
		63	mov eax,23 ; wait here for event
		64	int 0x40
		65	cmp eax,1 ; redraw request ?
		66	je draw_window
		67	cmp eax,2 ; key in buffer ?
		68	je read_string
		69	cmp eax,3 ; button in buffer ?
		70	je button
		71	jmp display_next
		72
		73	button: ; BUTTON
		74	mov eax,17
		75	int 0x40
		76	cmp ah,3
		77	je set_as_bgr2
		78	cmp ah,2
		79	je slideshow
		80	cmp ah,1 ; CLOSE PROGRAM
		81	jne close_program.exit
		82	close_program:
		83	mov eax,-1
		84	int 0x40
		85	.exit:
		86	ret
		87
		88	; Put a 'chunk' of the image on the window
		89	put_image:
		90	pushad
		91
		92	lea ebp,[edx+eax+7]
		93	cmp [winxs],bp
		94	jc .l1
		95	lea ebp,[ecx+ebx+20+2+17]
		96	cmp [winys],bp
		97	jc .l1
		98
		99	add eax,5 ; offset for boarder
		100	add ebx,20 ; offset for title bar
		101	push ax ; pox
		102	push bx ; pos
		103	push cx ; size
		104	push dx ; size
		105	pop ecx
		106	pop edx
		107	mov ebx,edi
		108	mov eax,7
		109
		110	int 40h ; Put image function
		111	.l1:
		112	popad
		113	ret
		114
		115
		116
		117	;******************************************************************************
		118
		119	check_parameters:
		120	cmp [PARAMS], dword "BOOT" ; received BOOT parameter -> goto handler
		121	je boot_set_background
		122
		123	mov edi, name_string ; clear string with file name
		124	mov al, 0
		125	mov ecx, 100
		126	rep stosb
		127
		128	mov ecx, 100 ; calculate length of parameter string
		129	mov edi, PARAMS
		130	repne scasb
		131	sub edi, PARAMS
		132	mov ecx, edi
		133
		134	mov esi, PARAMS ; copy parameters to file name
		135	mov edi, name_string
		136	cld
		137	rep movsb
		138
		139	jmp START.l1 ; return to beggining of the progra
		140
		141	;******************************************************************************
		142
		143
		144	set_default_colours:
		145
		146	pusha
		147
		148	mov eax,6 ; load default color map
		149	mov ebx,defcol
		150	mov ecx,0
		151	mov edx,-1
		152	mov esi,0x10000
		153	int 0x40
		154
		155	mov eax,48 ; set default color map
		156	mov ebx,2
		157	mov ecx,0x10000
		158	mov edx,10*4
		159	int 0x40
		160
		161	popa
		162	ret
		163
		164	defcol db 'DEFAULT.DTP'
		165
		166
		167	boot_set_background:
		168	call set_default_colours
		169
		170	mov ecx,memsize-fin-stack_size ; size
		171	mov edi,fin ; pointer
		172	call add_mem ; mark memory from fin to 0x100000-1024 as free
		173	; Get some memory
		174	mov ecx,16384 ; get 16 Kb of memory
		175	call malloc ; returns pointer in edi
		176	mov [work_area],edi ; save it
		177	call colorprecalc ; calculate colors
		178	mov esi,name_string
		179	call open
		180	test eax,eax
		181	jz close_program
		182	call jpeg_info
		183	mov dword [jpeg_st],ebp
		184	call set_as_bgr2 ; set wallpaper
		185	jmp close_program ; close the program right now
		186
		187	;******************************************************************************
		188	;******************************************************************************
		189
		190	set_as_bgr2:
		191	mov ebp,dword[jpeg_st]
		192	test ebp,ebp
		193	jz .end
		194
		195	mov dword [ebp+draw_ptr],put_chunk_to_bgr
		196	call jpeg_display
		197	mov eax, 15
		198	mov ebx, 1
		199	mov ecx, [ebp + x_size]
		200	mov edx, [ebp + y_size]
		201	int 0x40
		202
		203	; Stretch the image to fit
		204	mov eax, 15
		205	mov ebx, 4
		206	mov ecx, 2
		207	int 0x40
		208
		209	mov eax, 15
		210	mov ebx, 3
		211	int 0x40
		212
		213
		214	.end:
		215	ret
		216
		217	;******************************************************************************
		218
		219	put_chunk_to_bgr:
		220	pushad
		221
		222	mov [x_pointer], edi
		223	mov esi, ecx
		224	imul esi, 3
		225	mov [x_numofbytes], esi
		226	mov ecx, [ebp + x_size]
		227	imul ecx, ebx
		228	add ecx, eax
		229	imul ecx, 3
		230	mov [x_offset], ecx
		231	mov [x_counter], edx
		232	mov eax, [ebp + x_size]
		233	imul eax, 3
		234	mov [x_numofb2], eax
		235	.new_string:
		236	mov eax, 15
		237	mov ebx, 5
		238	mov ecx, [x_pointer]
		239	mov edx, [x_offset]
		240	mov esi, [x_numofbytes]
		241	int 0x40
		242	mov eax, [x_numofbytes]
		243	add [x_pointer], eax
		244	mov eax, [x_numofb2]
		245	add [x_offset], eax
		246	dec [x_counter]
		247	jnz .new_string
		248
		249	popad
		250	ret
		251
		252	;******************************************************************************
		253
		254
		255
		256	; *********************************************
		257	; ***** WINDOW DEFINITIONS AND DRAW ******
		258	; *********************************************
		259
		260
		261	draw_window:
		262
		263	mov eax,12
		264	mov ebx,1
		265	int 0x40
		266
		267	; Draw the window to the appropriate size - it may have
		268	; been resized by the user
		269	mov eax, 0
		270	cmp [winxs], ax
		271	jne dw_001
		272
		273	; Give the screen some inital defaults
		274	mov ax, 400
		275	mov [winxs], ax
		276

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(root)/programs/media/jpegview/trunk/jpegview.asm @ 2209 – Rev 31