| 0,0 → 1,178 |
|---|
| ; |
| ; Z buffer |
| ; |
| |
| include 'zfeatures.inc' |
| |
| ZB_Z_BITS equ 16 |
| |
| ZB_POINT_Z_FRAC_BITS equ 14 |
| |
| ZB_POINT_S_MIN equ ( (1 shl 13) ) |
| ZB_POINT_S_MAX equ ( (1 shl 22)-(1 shl 13) ) |
| ZB_POINT_T_MIN equ ( (1 shl 21) ) |
| ZB_POINT_T_MAX equ ( (1 shl 30)-(1 shl 21) ) |
| |
| ZB_POINT_RED_MIN equ ( (1 shl 10) ) |
| ZB_POINT_RED_MAX equ ( (1 shl 16)-(1 shl 10) ) |
| ZB_POINT_GREEN_MIN equ ( (1 shl 9) ) |
| ZB_POINT_GREEN_MAX equ ( (1 shl 16)-(1 shl 9) ) |
| ZB_POINT_BLUE_MIN equ ( (1 shl 10) ) |
| ZB_POINT_BLUE_MAX equ ( (1 shl 16)-(1 shl 10) ) |
| |
| ; display modes |
| ZB_MODE_5R6G5B equ 1 ; true color 16 bits |
| ZB_MODE_INDEX equ 2 ; color index 8 bits |
| ZB_MODE_RGBA equ 3 ; 32 bit rgba mode |
| ZB_MODE_RGB24 equ 4 ; 24 bit rgb mode |
| ZB_NB_COLORS equ 225 ; number of colors for 8 bit display |
| |
| if TGL_FEATURE_RENDER_BITS eq 15 |
| |
| ;#define RGB_TO_PIXEL(r,g,b) \ |
| ; ((((r) >> 1) & 0x7c00) | (((g) >> 6) & 0x03e0) | ((b) >> 11)) |
| ;typedef unsigned short PIXEL; |
| ;/* bytes per pixel */ |
| ;PSZB equ 2 |
| ;/* bits per pixel = (1 << PSZH) */ |
| ;PSZSH equ 4 |
| |
| else if TGL_FEATURE_RENDER_BITS eq 16 |
| |
| ;/* 16 bit mode */ |
| ;#define RGB_TO_PIXEL(r,g,b) \ |
| ; (((r) & 0xF800) | (((g) >> 5) & 0x07E0) | ((b) >> 11)) |
| ;typedef unsigned short PIXEL; |
| ;PSZB equ 2 |
| ;PSZSH equ 4 |
| |
| else if TGL_FEATURE_RENDER_BITS eq 24 |
| |
| macro RGB_TO_PIXEL r,g,b |
| { |
| mov eax,b |
| shr eax,8 |
| push eax |
| mov eax,g |
| and eax,0xff00 |
| or dword[esp],eax |
| mov eax,r |
| shl eax,8 |
| or dword[esp],eax |
| pop eax |
| } |
| |
| ;typedef unsigned char PIXEL; |
| PSZB equ 3 |
| PSZSH equ 5 |
| |
| else if TGL_FEATURE_RENDER_BITS eq 32 |
| |
| ;#define RGB_TO_PIXEL(r,g,b) \ |
| ; ((((r) << 8) & 0xff0000) | ((g) & 0xff00) | ((b) >> 8)) |
| ;typedef unsigned int PIXEL; |
| ;PSZB equ 4 |
| ;PSZSH equ 5 |
| |
| else |
| |
| ;#error Incorrect number of bits per pixel |
| |
| end if |
| |
| struct ZBuffer |
| xsize dd ? ;int |
| ysize dd ? ;int |
| linesize dd ? ;int ;line size, in bytes |
| mode dd ? ;int |
| |
| zbuf dd ? ;*unsigned short |
| pbuf dd ? ;*PIXEL |
| frame_buffer_allocated dd ? ;int |
| |
| nb_colors dd ? ;int |
| dctable dd ? ;*unsigned char |
| ctable dd ? ;*int |
| current_texture dd ? ;*PIXEL |
| ends |
| |
| offs_zbuf_xsize equ 0 |
| offs_zbuf_ysize equ 4 |
| offs_zbuf_linesize equ 8 |
| offs_zbuf_mode equ 16 |
| offs_zbuf_zbuf equ 20 |
| offs_zbuf_pbuf equ 24 |
| offs_zbuf_frame_buffer_allocated equ 28 |
| offs_zbuf_nb_colors equ 32 |
| offs_zbuf_dctable equ 36 |
| offs_zbuf_ctable equ 40 |
| offs_zbuf_current_texture equ 44 |
| |
| struct ZBufferPoint |
| x dd ? ;int ;integer coordinates in the zbuffer |
| y dd ? ;int |
| z dd ? ;int |
| s dd ? ;int ;coordinates for the mapping |
| t dd ? ;int |
| r dd ? ;int ;color indexes |
| g dd ? ;int |
| b dd ? ;int |
| |
| fsz dd ? ;float ;temporary coordinates for mapping |
| tz dd ? ;float |
| ends |
| |
| offs_zbup_x equ 0 |
| offs_zbup_y equ 4 |
| offs_zbup_z equ 8 |
| offs_zbup_s equ 12 |
| offs_zbup_t equ 16 |
| offs_zbup_r equ 20 |
| offs_zbup_g equ 24 |
| offs_zbup_b equ 28 |
| offs_zbup_sz equ 32 |
| offs_zbup_tz equ 36 |
| |
| ; ztriangle.c |
| |
| ; |
| ; Memory allocator for TinyGL |
| ; |
| |
| ; modify these functions so that they suit your needs |
| |
| align 4 |
| proc gl_free uses ebx ecx, mptr:dword |
| mov ecx,[mptr] |
| or ecx,ecx |
| jz @f |
| @@: |
| mcall 68, 13 |
| ret |
| endp |
| |
| ;description: |
| ; выделение памяти |
| align 4 |
| proc gl_malloc uses ebx ecx, size:dword |
| mcall 68, 12, [size] |
| ret |
| endp |
| |
| ;description: |
| ; выделение очищеной памяти |
| align 4 |
| proc gl_zalloc uses ebx ecx edi, size:dword |
| mov ecx,[size] |
| stdcall gl_malloc,ecx |
| cmp eax,0 |
| je @f |
| mov ebx,eax |
| mov edi,eax |
| xor eax,eax |
| shr ecx,2 |
| rep stosd ;очистка памяти (пишем везде 0) |
| mov eax,ebx |
| @@: |
| ret |
| endp |