138 lines
2.7 KiB
PHP
138 lines
2.7 KiB
PHP
;
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; Z buffer
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;
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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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ZB_POINT_TEXEL_SIZE equ 12 ;точность множителя для вычисления координат текселя
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;влияет на максимальный размер текстуры
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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 )
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; 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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if TGL_FEATURE_RENDER_BITS eq 24
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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
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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
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s_log2 dd ? ;unsigned int
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s_bound dd ? ;unsigned int
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t_bound dd ? ;unsigned int
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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
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; ztriangle.c
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;
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; Memory allocator for TinyGL
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;
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; modify these functions so that they suit your needs
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align 4
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proc gl_free uses eax ebx ecx, mptr:dword
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mov ecx,[mptr]
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or ecx,ecx
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jz @f
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mcall 68, 13
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@@:
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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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;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
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or eax,eax
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jz @f
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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
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