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Rev Author Line No. Line
5153 IgorA 1 
;
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; Z buffer
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;
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5 
include 'zfeatures.inc'
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ZB_Z_BITS equ 16
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ZB_POINT_Z_FRAC_BITS equ 14
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6243 IgorA 11 
ZB_POINT_TEXEL_SIZE equ 12 ;точность множителя для вычисления координат текселя
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	;влияет на максимальный размер текстуры
5153 IgorA 13 
 
5213 IgorA 14 
ZB_POINT_RED_MIN equ (1 shl 8)
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ZB_POINT_RED_MAX equ ( (1 shl 16)-1 )
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ZB_POINT_GREEN_MIN equ (1 shl 8)
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ZB_POINT_GREEN_MAX equ ( (1 shl 16)-1 )
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ZB_POINT_BLUE_MIN equ (1 shl 8)
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ZB_POINT_BLUE_MAX equ ( (1 shl 16)-1 )
5153 IgorA 20 
 
21 
; display modes
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ZB_MODE_5R6G5B equ 1  ; true color 16 bits
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ZB_MODE_INDEX  equ 2  ; color index 8 bits
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ZB_MODE_RGBA   equ 3  ; 32 bit rgba mode
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ZB_MODE_RGB24  equ 4  ; 24 bit rgb mode
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ZB_NB_COLORS   equ 225 ; number of colors for 8 bit display
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6243 IgorA 28 
if TGL_FEATURE_RENDER_BITS eq 24
5153 IgorA 29 
 
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macro RGB_TO_PIXEL r,g,b
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{
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	mov eax,b
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	shr eax,8
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	push eax
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		mov eax,g
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		and eax,0xff00
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		or dword[esp],eax
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		mov eax,r
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		shl eax,8
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		or dword[esp],eax
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	pop eax
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}
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;typedef unsigned char PIXEL;
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PSZB equ 3
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PSZSH equ 5
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else if TGL_FEATURE_RENDER_BITS eq 32
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;#define RGB_TO_PIXEL(r,g,b) \
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;  ((((r) << 8) & 0xff0000) | ((g) & 0xff00) | ((b) >> 8))
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;typedef unsigned int PIXEL;
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;PSZB equ 4
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;PSZSH equ 5
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else
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;#error Incorrect number of bits per pixel
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end if
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struct ZBuffer
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	xsize dd ? ;int
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	ysize dd ? ;int
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	linesize dd ? ;int ;line size, in bytes
8069 IgorA 66 
		dd ? ;fix old error offset
5153 IgorA 67 
	mode dd ? ;int
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	zbuf dd ? ;*unsigned short
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	pbuf dd ? ;*PIXEL
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	frame_buffer_allocated dd ? ;int
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	nb_colors dd ? ;int
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	dctable dd ? ;*unsigned char
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	ctable dd ? ;*int
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	current_texture dd ? ;*PIXEL
6243 IgorA 77 
	s_log2 dd ? ;unsigned int
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	s_bound dd ? ;unsigned int
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	t_bound dd ? ;unsigned int
5153 IgorA 80 
ends
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struct ZBufferPoint
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	x dd ? ;int ;integer coordinates in the zbuffer
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	y dd ? ;int
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	z dd ? ;int
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	s dd ? ;int ;coordinates for the mapping
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	t dd ? ;int
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	r dd ? ;int ;color indexes
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	g dd ? ;int
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	b dd ? ;int
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	fsz dd ? ;float ;temporary coordinates for mapping
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	tz dd ? ;float
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ends
95 
 
96 
; ztriangle.c
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;
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; Memory allocator for TinyGL
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;
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102 
; modify these functions so that they suit your needs
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align 4
5218 IgorA 105 
proc gl_free uses eax ebx ecx, mptr:dword
5153 IgorA 106 
	mov ecx,[mptr]
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	or ecx,ecx
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	jz @f
5218 IgorA 109 
		mcall 68, 13
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	@@:
5153 IgorA 111 
	ret
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endp
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;description:
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; выделение памяти
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align 4
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proc gl_malloc uses ebx ecx, size:dword
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	mcall 68, 12, [size]
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	ret
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endp
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122 
;description:
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; выделение очищеной памяти
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align 4
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proc gl_zalloc uses ebx ecx edi, size:dword
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	mov ecx,[size]
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	stdcall gl_malloc,ecx
5218 IgorA 128 
	or eax,eax
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	jz @f
5153 IgorA 130 
		mov ebx,eax
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		mov edi,eax
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		xor eax,eax
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		shr ecx,2
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		rep stosd ;очистка памяти (пишем везде 0)
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		mov eax,ebx
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	@@:
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	ret
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endp