534 lines
11 KiB
NASM
534 lines
11 KiB
NASM
;
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;
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; Z buffer: 16 bits Z / 16 bits color
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;
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;
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;include 'zbuffer.inc'
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;output:
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; eax - указатель на ZBuffer (0 если не удача)
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align 16
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proc ZB_open uses ecx edi, xsize:dword, ysize:dword, mode:dword,\
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nb_colors:dword, color_indexes:dword, color_table:dword, frame_buffer:dword
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stdcall gl_malloc, sizeof.ZBuffer
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cmp eax,0
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jne @f
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stdcall dbg_print,f_zb_opn,err_1
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jmp .end_f
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@@:
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mov edi,eax
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mov eax,[ysize]
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mov [edi+offs_zbuf_ysize],eax
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mov eax,[xsize]
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mov [edi+offs_zbuf_xsize],eax
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imul eax,PSZB
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add eax,3
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and eax,not 3
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mov [edi+offs_zbuf_linesize],eax
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mov eax,[mode]
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mov [edi+offs_zbuf_mode],eax
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if TGL_FEATURE_32_BITS eq 1
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cmp eax,ZB_MODE_RGBA
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je .correct
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end if
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if TGL_FEATURE_24_BITS eq 1
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cmp eax,ZB_MODE_RGB24
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je .correct
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end if
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cmp eax,ZB_MODE_5R6G5B
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jne @f
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.correct:
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mov dword[edi+offs_zbuf_nb_colors],0
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jmp .end_s
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@@: ;default:
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stdcall dbg_print,f_zb_opn,err_3
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jmp .error
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.end_s:
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mov ecx,[edi+offs_zbuf_xsize]
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imul ecx,[edi+offs_zbuf_ysize]
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shl ecx,1 ;*= sizeof(unsigned short)
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stdcall gl_malloc, ecx
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mov [edi+offs_zbuf_zbuf],eax
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cmp eax,0
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jne @f
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stdcall dbg_print,f_zb_opn,err_2
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jmp .error
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@@:
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mov dword[edi+offs_zbuf_frame_buffer_allocated],0
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mov dword[edi+offs_zbuf_pbuf],0 ;NULL
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mov dword[edi+offs_zbuf_current_texture],0 ;NULL
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mov eax,edi
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jmp .end_f
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.error:
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stdcall gl_free,edi
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xor eax,eax
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.end_f:
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ret
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endp
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;void ZB_close(ZBuffer * zb)
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;{
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; if (zb->frame_buffer_allocated)
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; gl_free(zb->pbuf);
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; gl_free(zb->zbuf);
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; gl_free(zb);
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;}
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align 16
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proc ZB_resize uses eax ebx ecx edi esi, zb:dword, frame_buffer:dword, xsize:dword, ysize:dword
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mov ebx,[zb]
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; xsize must be a multiple of 4
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mov edi,[xsize]
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and edi,not 3
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mov esi,[ysize]
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mov [ebx+offs_zbuf_xsize], edi
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mov [ebx+offs_zbuf_ysize], esi
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mov eax,edi
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imul eax,PSZB
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add eax,3
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and eax,not 3
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mov [ebx+offs_zbuf_linesize],eax ;zb.linesize = (xsize * PSZB + 3) & ~3
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mov ecx,edi
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imul ecx,esi
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shl ecx,1 ;*= sizeof(unsigned short)
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stdcall gl_free,dword[ebx+offs_zbuf_zbuf]
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stdcall gl_malloc,ecx
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mov [ebx+offs_zbuf_zbuf],eax
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cmp dword[ebx+offs_zbuf_frame_buffer_allocated],0
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je @f
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stdcall gl_free,dword[ebx+offs_zbuf_pbuf]
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@@:
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cmp dword[frame_buffer],0
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jne .els_0
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inc esi
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imul esi,dword[ebx+offs_zbuf_linesize]
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stdcall gl_malloc,esi
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mov dword[ebx+offs_zbuf_pbuf],eax
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mov dword[ebx+offs_zbuf_frame_buffer_allocated],1
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jmp @f
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.els_0:
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mov eax,[frame_buffer]
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mov dword[ebx+offs_zbuf_pbuf],eax
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mov dword[ebx+offs_zbuf_frame_buffer_allocated],0
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@@:
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ret
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endp
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;static void ZB_copyBuffer(ZBuffer * zb,
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; void *buf,
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; int linesize)
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;{
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; unsigned char *p1;
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; PIXEL *q;
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; int y, n;
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; q = zb->pbuf;
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; p1 = buf;
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; n = zb->xsize * PSZB;
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; for (y = 0; y < zb->ysize; y++) {
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; memcpy(p1, q, n);
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; p1 += linesize;
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; q = (PIXEL *) ((char *) q + zb->linesize);
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; }
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;}
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;#if TGL_FEATURE_RENDER_BITS == 16
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;/* 32 bpp copy */
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;#ifdef TGL_FEATURE_32_BITS
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;#define RGB16_TO_RGB32(p0,p1,v)\
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;{\
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; unsigned int g,b,gb;\
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; g = (v & 0x07E007E0) << 5;\
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; b = (v & 0x001F001F) << 3;\
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; gb = g | b;\
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; p0 = (gb & 0x0000FFFF) | ((v & 0x0000F800) << 8);\
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; p1 = (gb >> 16) | ((v & 0xF8000000) >> 8);\
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;}
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;static void ZB_copyFrameBufferRGB32(ZBuffer * zb,
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; void *buf,
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; int linesize)
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;{
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; unsigned short *q;
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; unsigned int *p, *p1, v, w0, w1;
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; int y, n;
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; q = zb->pbuf;
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; p1 = (unsigned int *) buf;
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; for (y = 0; y < zb->ysize; y++) {
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; p = p1;
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; n = zb->xsize >> 2;
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; do {
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; v = *(unsigned int *) q;
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;#if BYTE_ORDER == BIG_ENDIAN
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; RGB16_TO_RGB32(w1, w0, v);
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;#else
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; RGB16_TO_RGB32(w0, w1, v);
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;#endif
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; p[0] = w0;
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; p[1] = w1;
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; v = *(unsigned int *) (q + 2);
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;#if BYTE_ORDER == BIG_ENDIAN
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; RGB16_TO_RGB32(w1, w0, v);
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;#else
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; RGB16_TO_RGB32(w0, w1, v);
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;#endif
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; p[2] = w0;
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; p[3] = w1;
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; q += 4;
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; p += 4;
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; } while (--n > 0);
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; p1 += linesize;
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; }
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;}
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;#endif
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;/* 24 bit packed pixel handling */
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;#ifdef TGL_FEATURE_24_BITS
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;/* order: RGBR GBRG BRGB */
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;/* XXX: packed pixel 24 bit support not tested */
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;/* XXX: big endian case not optimised */
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;#if BYTE_ORDER == BIG_ENDIAN
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;#define RGB16_TO_RGB24(p0,p1,p2,v1,v2)\
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;{\
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; unsigned int r1,g1,b1,gb1,g2,b2,gb2;\
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; v1 = (v1 << 16) | (v1 >> 16);\
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; v2 = (v2 << 16) | (v2 >> 16);\
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; r1 = (v1 & 0xF800F800);\
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; g1 = (v1 & 0x07E007E0) << 5;\
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; b1 = (v1 & 0x001F001F) << 3;\
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; gb1 = g1 | b1;\
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; p0 = ((gb1 & 0x0000FFFF) << 8) | (r1 << 16) | (r1 >> 24);\
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; g2 = (v2 & 0x07E007E0) << 5;\
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; b2 = (v2 & 0x001F001F) << 3;\
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; gb2 = g2 | b2;\
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; p1 = (gb1 & 0xFFFF0000) | (v2 & 0xF800) | ((gb2 >> 8) & 0xff);\
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; p2 = (gb2 << 24) | ((v2 & 0xF8000000) >> 8) | (gb2 >> 16);\
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;}
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;#else
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;#define RGB16_TO_RGB24(p0,p1,p2,v1,v2)\
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;{\
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; unsigned int r1,g1,b1,gb1,g2,b2,gb2;\
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; r1 = (v1 & 0xF800F800);\
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; g1 = (v1 & 0x07E007E0) << 5;\
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; b1 = (v1 & 0x001F001F) << 3;\
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; gb1 = g1 | b1;\
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; p0 = ((gb1 & 0x0000FFFF) << 8) | (r1 << 16) | (r1 >> 24);\
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; g2 = (v2 & 0x07E007E0) << 5;\
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; b2 = (v2 & 0x001F001F) << 3;\
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; gb2 = g2 | b2;\
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; p1 = (gb1 & 0xFFFF0000) | (v2 & 0xF800) | ((gb2 >> 8) & 0xff);\
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; p2 = (gb2 << 24) | ((v2 & 0xF8000000) >> 8) | (gb2 >> 16);\
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;}
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;#endif
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;static void ZB_copyFrameBufferRGB24(ZBuffer * zb,
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; void *buf, int linesize)
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;{
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; unsigned short *q;
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; unsigned int *p, *p1, w0, w1, w2, v0, v1;
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; int y, n;
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; q = zb->pbuf;
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; p1 = (unsigned int *) buf;
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; linesize = linesize * 3;
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; for (y = 0; y < zb->ysize; y++) {
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; p = p1;
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; n = zb->xsize >> 2;
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; do {
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; v0 = *(unsigned int *) q;
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; v1 = *(unsigned int *) (q + 2);
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; RGB16_TO_RGB24(w0, w1, w2, v0, v1);
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; p[0] = w0;
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; p[1] = w1;
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; p[2] = w2;
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; q += 4;
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; p += 3;
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; } while (--n > 0);
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;
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; (char *) p1 += linesize;
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; }
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;}
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;#endif
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;void ZB_copyFrameBuffer(ZBuffer * zb, void *buf,
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; int linesize)
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;{
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; switch (zb->mode) {
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;#ifdef TGL_FEATURE_32_BITS
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; case ZB_MODE_RGBA:
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; ZB_copyFrameBufferRGB32(zb, buf, linesize >> 1);
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; break;
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;#endif
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;#ifdef TGL_FEATURE_24_BITS
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; case ZB_MODE_RGB24:
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; ZB_copyFrameBufferRGB24(zb, buf, linesize >> 1);
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; break;
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;#endif
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; default:
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; assert(0);
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; }
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;}
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;#endif /* TGL_FEATURE_RENDER_BITS == 16 */
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;#if TGL_FEATURE_RENDER_BITS == 24
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;#define RGB24_TO_RGB16(r, g, b) \
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; ((((r) >> 3) << 11) | (((g) >> 2) << 5) | ((b) >> 3))
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;/* XXX: not optimized */
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;static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb,
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; void *buf, int linesize)
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;{
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; PIXEL *q;
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; unsigned short *p, *p1;
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; int y, n;
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; q = zb->pbuf;
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; p1 = (unsigned short *) buf;
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; for (y = 0; y < zb->ysize; y++) {
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; p = p1;
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; n = zb->xsize >> 2;
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; do {
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; p[0] = RGB24_TO_RGB16(q[0], q[1], q[2]);
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; p[1] = RGB24_TO_RGB16(q[3], q[4], q[5]);
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; p[2] = RGB24_TO_RGB16(q[6], q[7], q[8]);
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; p[3] = RGB24_TO_RGB16(q[9], q[10], q[11]);
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; q = (PIXEL *)((char *)q + 4 * PSZB);
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; p += 4;
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; } while (--n > 0);
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; p1 = (unsigned short *)((char *)p1 + linesize);
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; }
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;}
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;void ZB_copyFrameBuffer(ZBuffer * zb, void *buf,
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; int linesize)
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;{
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; switch (zb->mode) {
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;#ifdef TGL_FEATURE_24_BITS
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; case ZB_MODE_RGB24:
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; ZB_copyBuffer(zb, buf, linesize);
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; break;
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;#endif
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; default:
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; assert(0);
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; }
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;}
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;#endif /* TGL_FEATURE_RENDER_BITS == 24 */
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;#if TGL_FEATURE_RENDER_BITS == 32
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;#define RGB32_TO_RGB16(v) \
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; (((v >> 8) & 0xf800) | (((v) >> 5) & 0x07e0) | (((v) & 0xff) >> 3))
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;/* XXX: not optimized */
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;static void ZB_copyFrameBuffer5R6G5B(ZBuffer * zb,
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; void *buf, int linesize)
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;{
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; PIXEL *q;
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; unsigned short *p, *p1;
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; int y, n;
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; q = zb->pbuf;
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; p1 = (unsigned short *) buf;
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; for (y = 0; y < zb->ysize; y++) {
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; p = p1;
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; n = zb->xsize >> 2;
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; do {
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; p[0] = RGB32_TO_RGB16(q[0]);
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; p[1] = RGB32_TO_RGB16(q[1]);
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; p[2] = RGB32_TO_RGB16(q[2]);
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; p[3] = RGB32_TO_RGB16(q[3]);
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; q += 4;
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; p += 4;
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; } while (--n > 0);
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; p1 = (unsigned short *)((char *)p1 + linesize);
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; }
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;}
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;void ZB_copyFrameBuffer(ZBuffer * zb, void *buf,
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; int linesize)
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;{
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; switch (zb->mode) {
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;#ifdef TGL_FEATURE_32_BITS
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; case ZB_MODE_RGBA:
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; ZB_copyBuffer(zb, buf, linesize);
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; break;
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;#endif
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; default:
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; assert(0);
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; }
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;}
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;#endif /* TGL_FEATURE_RENDER_BITS == 32 */
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;
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; adr must be aligned on an 'int'
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;
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;destroy:
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; ecx, edi
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align 16
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proc memset_s uses eax, adr:dword, val:dword, count:dword
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mov eax,[val]
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mov di,ax
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ror eax,16
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mov ax,di
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mov ecx,[count]
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shr ecx,1
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mov edi,[adr]
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rep stosd
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bt dword[count],0
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jnc @f
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stosw
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@@:
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ret
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endp
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align 16
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proc memset_l uses eax ecx edi, adr:dword, val:dword, count:dword
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mov eax,[val]
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mov ecx,[count]
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mov edi,[adr]
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rep stosd
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ret
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endp
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; count must be a multiple of 4 and >= 4
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;destroy:
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; edi, esi
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align 16
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proc memset_RGB24 uses eax ecx, adr:dword, r:dword, g:dword, b:dword, count:dword
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mov esi,[adr]
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mov eax,[r] ;копируем в буфер первые 12 байт (минимальное число кратное 3 и 4)
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mov byte[esi],al
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mov byte[esi+3],al
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mov byte[esi+6],al
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mov byte[esi+9],al
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mov eax,[g]
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mov byte[esi+1],al
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mov byte[esi+4],al
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mov byte[esi+7],al
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mov byte[esi+10],al
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mov eax,[b]
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mov byte[esi+2],al
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mov byte[esi+5],al
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mov byte[esi+8],al
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mov byte[esi+11],al
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mov ecx,[count]
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shr ecx,2
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cmp ecx,1
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jle .end_f ;если ширина буфера меньше 12 байт, то выходим
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dec ecx
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mov edi,esi
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add edi,12
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mov eax,[esi]
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cmp eax,[esi+4]
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jne @f
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;если r=g и g=b и b=r
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mov esi,ecx
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shl ecx,2
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sub ecx,esi ;ecx*=3
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rep stosd
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jmp .end_f
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align 16
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@@: ;если r!=g или g!=b или b!=r
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movsd
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movsd
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movsd
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sub esi,12
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loop @b
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.end_f:
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ret
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endp
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align 16
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proc ZB_clear uses eax ebx ecx edi esi, zb:dword, clear_z:dword, z:dword,\
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clear_color:dword, r:dword, g:dword, b:dword
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;if TGL_FEATURE_RENDER_BITS != 24
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; color dd ?
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;end if
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mov eax,[zb]
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cmp dword[clear_z],0
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je @f
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mov ebx,[eax+offs_zbuf_xsize]
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imul ebx,[eax+offs_zbuf_ysize]
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stdcall memset_s, [eax+offs_zbuf_zbuf],[z],ebx
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@@:
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cmp dword[clear_color],0
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je @f
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if TGL_FEATURE_RENDER_BITS eq 24
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mov ebx,[eax+offs_zbuf_xsize]
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push ebx
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mov ebx,[b]
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shr ebx,8
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push ebx
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mov ebx,[g]
|
|
shr ebx,8
|
|
push ebx
|
|
mov ebx,[r]
|
|
shr ebx,8
|
|
push ebx
|
|
add esp,16
|
|
end if
|
|
mov ebx,[eax+offs_zbuf_pbuf]
|
|
mov ecx,[eax+offs_zbuf_ysize]
|
|
align 4
|
|
.cycle_0:
|
|
if TGL_FEATURE_RENDER_BITS eq 32
|
|
;color = RGB_TO_PIXEL(r, g, b)
|
|
;memset_l(ebx, color, zb->xsize)
|
|
end if
|
|
if TGL_FEATURE_RENDER_BITS eq 24
|
|
sub esp,16
|
|
stdcall memset_RGB24,ebx
|
|
end if
|
|
add ebx,[eax+offs_zbuf_linesize]
|
|
loop .cycle_0
|
|
@@:
|
|
ret
|
|
endp
|