782 lines
17 KiB
PHP
782 lines
17 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; VGA.INC ;;
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;; ;;
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;; 640x480 mode 0x12 VGA functions for MenuetOS ;;
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;; ;;
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;; Paul Butcher, paul.butcher@asa.co.uk ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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paletteVGA:
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;16 colour palette
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mov dx,0x3c8
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mov al,0
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out dx,al
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mov ecx,16
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mov dx,0x3c9
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xor eax,eax
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palvganew:
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mov al,0
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test ah,4
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jz palvgalbl1
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add al,31
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test ah,8
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jz palvgalbl1
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add al,32
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palvgalbl1:
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out dx,al ; red 0,31 or 63
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mov al,0
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test ah,2
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jz palvgalbl2
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add al,31
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test ah,8
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jz palvgalbl2
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add al,32
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palvgalbl2:
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out dx,al ; blue 0,31 or 63
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mov al,0
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test ah,1
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jz palvgalbl3
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add al,31
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test ah,8
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jz palvgalbl3
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add al,32
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palvgalbl3:
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out dx,al ; green 0,31 or 63
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add ah,1
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loop palvganew
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ret
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vga_putimage:
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push ebp ;
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push esi ;
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push edi ;
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push eax ;
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push ebx ; +8 [ptrImage]
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push ecx ; +4 [BH]
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push edx ; +0 [xy]
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movzx eax,word [esp+2] ; eax:=x
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movzx ebx,word [esp+0] ; ebx:=y
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mov ecx,[0x3010] ;
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add eax,[ecx-twdw] ; eax+=Xwin
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add ebx,[ecx-twdw+4] ; ebx+=Ywin
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mov ecx,ebx ; ecx = y+Ywin
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mov edx,eax ; edx = x+Xwin
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imul ebx, 640*4 ; (y+Ywin)*BytesPerScanLine
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shl eax,2 ; (x+Xwin)*BytesPerPixel
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add eax,ebx ;
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mov edi,eax ; store copy
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add eax,[0xfe80] ; +AddrLFB
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;entry point in LFB >> EAX:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+AddrLFB
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shr edi,5 ; change from 4 to 1/8 BytesPerPixel
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add edi,0xa0000 ; + VGABasePtr
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;VGA start address >> EDI:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+AddrVGA
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mov ebx, [0xfe00] ; ScreenXSize
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inc ebx ; +1
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imul ebx,ecx ; *(y+Ywin)
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mov ebp, ebx ;
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add ebp, edx ; +(x+Xwin)
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add ebp, WinMapAddress ; ebp:=(y+Ywin)*(ScreenXSize+1)+(x+Xwin)+AddrBuffer
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mov esi,[esp+8] ; esi:=AddrImg
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movzx ecx,word [esp+6] ; ecx:=B
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movzx ebx,word [esp+4] ; ebx:=H
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; check limits while draw ?
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push ecx ; B
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push eax ; LFB address
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mov eax,[0x3010]
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mov ecx,[eax+draw_data-0x3000+0]
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cmp ecx,0
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jnz dbcblimitlset_vga
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mov ecx,[eax+draw_data-0x3000+4]
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cmp ecx,0
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jnz dbcblimitlset_vga
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mov ecx,[eax+draw_data-0x3000+8]
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cmp ecx,[0xfe00] ; ecx <> Screen X size
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jnz dbcblimitlset_vga
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mov ecx,[eax+draw_data-0x3000+12]
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cmp ecx,[0xfe04] ; ecx <> Screen Y size
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jnz dbcblimitlset_vga
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pop eax ; LFB address
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pop ecx ; B
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push dword 0
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jmp pimvga
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dbcblimitlset_vga:
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pop eax ; LFB address
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pop ecx ; B
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push dword 1
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pimvga:
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push edi
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push esi
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push eax ; LFB address
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push ecx ; B
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push ebx ; H
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push edx ; x+Xwin
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mov ebx,[0x3010]
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mov bl,[ebx+0xe]
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mov bh,[esp+6*4]
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cld
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npvga:
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cmp bl,[ds:ebp]
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jnz impvgano
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; cmp bh,0
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; jz impvgayes
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; call voodoodbcplimit
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; jnz impvgano
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; impvgayes:
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push eax ; LFB address
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push ebx ; app no.
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push ecx ; B
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push edx ; x+Xwin
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mov edx,[esi] ; color
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mov [eax],dx
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shr edx,16
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mov [eax+2],dl
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mov eax,[esi] ; color
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mov ecx,[esp] ; x+Xwin
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and ecx,0x07 ; modulo 8
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call setvgapixel ; eax=color, ecx=x%8, edi=VGA address
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pop edx
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pop ecx
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pop ebx
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pop eax
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impvgano:
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add esi,3 ; esi+=3 ptrImage+=3
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add eax,4 ; eax+=4 LFBaddr +=4
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inc ebp
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inc edx ; x+Xwin+n
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test edx,0x07 ; test modulo 8
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jnz impvgacont
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inc edi
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impvgacont:
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dec ecx ; B--
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jnz npvga
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pop edx
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pop ebx
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pop ecx
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pop eax
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pop esi
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pop edi
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add edi,640/8 ; add one VGA line
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add eax,640*4 ; add one LFB line
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sub ebp, ecx ; -B
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add ebp, [0xfe00] ;
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inc ebp ; ptrBuffer:=ptrBuffer-B+Screen_Xsize+1
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push ecx
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lea ecx,[ecx+ecx*2] ;
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add esi,ecx ; ptrImage:=ptrImage+B*3
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pop ecx
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dec ebx ; H--
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jnz near pimvga
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add esp,4 ; jump saved limit byte
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pop edx
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pop ecx
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pop ebx
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pop eax
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pop edi
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pop esi
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pop ebp
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ret
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VGA_putpixel:
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; eax = x
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; ebx = y
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mov ecx,eax
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mov eax, [esp+32-8+4] ; color
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imul ebx, 640*4 ; y*BytesPerLine (Vesa2.0 32)
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lea edx, [ebx+ecx*4] ; + x*BytesPerPixel (Vesa2.0 32)
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mov edi,edx
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add edi, [0xfe80] ; + LFB address
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mov [edi], eax ; write to LFB for Vesa2.0
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shr edx,5 ; change BytesPerPixel to 1/8
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mov edi,edx
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add edi, 0x0a0000 ; address of pixel in VGA area
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and ecx,0x07 ; bit no. (modulo 8)
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setvgapixel:
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; edi = address, eax = 24bit colour, ecx = bit no. (modulo 8)
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push eax
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mov ebx,eax ; color
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;mov al,0x08
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;mov dx,0x03ce
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;out dx,al ; select GDC bit mask register
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inc cl
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mov ax, 0x100
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shr ax,cl
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mov dx,0x03cf
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out dx,al ; set bit mask for pixel
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mov dl,0
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mov eax,ebx
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and eax,0x000000ff ; blue
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cmp eax,85
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jle p13green
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or dl,0x01
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cmp eax,170
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jle p13green
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or dl,0x08
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p13green:
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and ebx,0x0000ff00 ; green
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cmp ebx,85*256
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jle p13red
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or dl,0x02
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cmp ebx,170*256
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jle p13red
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or dl,0x08
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p13red:
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pop ebx
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and ebx,0x00ff0000 ; red
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cmp ebx,85*256*256
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jle p13cont
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or dl,0x04
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cmp ebx,170*256*256
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jle p13cont
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or dl,0x08
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p13cont:
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mov al,[edi] ; dummy read
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mov [edi],dl
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ret
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vga_drawbar:
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sub edx,ebx ; edx:=Yend-Ystart=H
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sub ecx,eax ; ecx:=Xend-Xstat=B
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push ebp ; +24
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push esi ; +20
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push edi ; +16
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push eax ; +12
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push ebx ; +8
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push ecx ; +4
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push edx ; +0
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mov ecx,[0x3010] ;
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add eax,[ecx-twdw] ; eax:=Xwin+x
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add ebx,[ecx-twdw+4] ; ebx:=Ywin+y
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mov ecx, eax ; ecx:=(x+Xwin)
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mov edx, ebx ; edx:=(y+Ywin)
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imul ebx, 640/8 ;
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mov edi, ebx ; edi:=BytesPerScanLine*(y+Ywin)
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shr eax, 3 ;
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add edi, eax ; + (x+Xwin)*BytesPerPixel
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add edi,0xa0000 ; + VGAbaseaddress
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mov eax, [0xfe00] ; ScreenXSize
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inc eax ; +1
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imul eax,edx ; *(y+Ywin)
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mov ebp, eax ;
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add ebp, ecx ; +(x+Win)
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add ebp, WinMapAddress ; +AddrBuffer
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mov eax, [0xfe08] ; BytesPerScanLine - LFB
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mul edx ; *(y+Ywin)
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mov esi,eax
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add esi,ecx
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add esi,ecx
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add esi,ecx
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add esi,ecx ; + 4*(x+Xwin)
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add esi,[0xfe80] ; +AddrLFB
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; edi:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel + AddrVGA
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; esi:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel + AddrLFB
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; ebp:=(y+Ywin)*(ScreenXSize+1)+(x+Xwin)+AddrBuffer
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; x size
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mov eax,[esp+4] ; B [esp+4]
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mov ebx,[esp+0] ; H
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mov edx,[esp+16] ; color
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test edx,0x80000000
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jz nodbglvga
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; no color glide for VGA - set to half glide
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shr ebx,1 ; H/2
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sub edx,ebx
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mov [esp+16],edx
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mov ebx,[esp+0] ; reset to H
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nodbglvga:
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; check limits ?
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push eax
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push ecx
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mov eax,[0x3010]
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mov ecx,[eax+draw_data-0x3000+0]
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cmp ecx,0
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jnz dbcblimitlset_vga2
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mov ecx,[eax+draw_data-0x3000+4]
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cmp ecx,0
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jnz dbcblimitlset_vga2
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mov ecx,[eax+draw_data-0x3000+8]
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cmp ecx,[0xfe00]
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jnz dbcblimitlset_vga2
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mov ecx,[eax+draw_data-0x3000+12]
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cmp ecx,[0xfe04]
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jnz dbcblimitlset_vga2
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pop ecx
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pop eax
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push dword 0
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jmp dbnewpivga
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dbcblimitlset_vga2:
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pop ecx ; x+Xwin
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pop eax ; B
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push dword 1
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dbnewpivga:
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push eax; B
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push ebx ; H
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push edi
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push esi
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push ecx ; x+Xwin
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mov ebx,[0x3010]
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movzx ebx,byte[ebx+0xe]
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cld
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dbnpvga:
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mov dl,[ds:ebp]
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cmp dl,bl
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jnz dbimpvgano
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; mov edx,[esp+5*4] ; check limit?
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; cmp edx,0
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; jz dbimpvgayes
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; call voodoodbcplimit
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; jnz dbimpvgano
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; dbimpvgayes:
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push eax ; B
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push ebx
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push ecx ; x+Xwin
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mov eax,[esp+12+20+16+4] ; color
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mov ebx,eax
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mov [esi],bx ; write LFB pixel
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shr ebx,16
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mov [esi+2],bl
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and ecx,0x07 ; modulo 8
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call setvgapixel ; eax=color, ecx=x%8, edi=VGA address
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pop ecx
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pop ebx
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pop eax
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dbimpvgano:
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add esi,4 ; ptrLFB+=4
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inc ebp ; address buffer
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inc ecx ; x posn++
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test ecx,0x07 ; test modulo 8
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jnz dbvgacont
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inc edi ; VGA screen ptr++
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dbvgacont:
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dec eax ; B-- NB ecx in Vesa20 fn?
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jnz dbnpvga
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dbnpvgad:
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pop ecx
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pop esi
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pop edi
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pop ebx
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pop eax
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add esi,[0xfe08] ; ptrLFB+=BytesPerScanLine
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add edi,640/8 ; ptrScreen+=BytesPerScanLine
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add ebp,[0xfe00] ;
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sub ebp, eax ; was ecx in vesa20 fn?
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inc ebp ; ptrBuffer:=ptrBuffer-B+BytesPerLine+1
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dec ebx ; H--
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jz nodbnewpivga ; H<>0
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jmp dbnewpivga
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nodbnewpivga:
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add esp,7*4 ; NB includes limit check flag
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;pop ebx
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;pop eax
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;pop edi
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;pop esi
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pop ebp
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;pop edx
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;pop ecx
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ret
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vga_drawbackground_tiled:
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push ebp
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push eax
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push ebx
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push ecx
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push edx
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mov edx,dword [0x400000-8] ; B
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add edx,dword [WinMapAddress-8] ; +B
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add edx,dword [WinMapAddress-8] ; +B
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push edx
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mov eax,[draw_data+32+0] ; x start:=(x+Xwin)
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mov ebx,[draw_data+32+4] ; y start:=(y+Ywin)
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mov ecx,eax
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mov edx,ebx
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imul edx, 640*4 ; (y+Ywin)*BytesPerScanLine
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shl ecx,2 ; (x+Xwin)*BytesPerPixel
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add ecx,edx ;
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mov ebp,ecx ; store copy
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add ecx,[0xfe80] ; +AddrLFB
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;entry point in LFB >> ECX:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+Addr
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shr ebp,5 ; change from 4 to 1/8 BytesPerPixel
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add ebp,0xa0000 ; + VGABasePtr
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;VGA start address >> EBP:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+AddrV
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call calculate_edi
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dp3vga: ; MAIN LOOP
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cmp [edi+WinMapAddress],byte 1 ; ptrBuffer^<>byte(1)
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je ybgpvga
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jmp nbgpvga
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ybgpvga:
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push eax ; x
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push ebx ; y
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push ecx ; LFB address
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mov ecx,dword [WinMapAddress-8] ; B
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xor edx,edx ; edx:=0
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div ecx ; Xstart/B
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; eax=Int(qn) edx:=Rem
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lea esi,[edx+edx*2] ; esi:=edx*3
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mov ecx,dword [WinMapAddress-4] ; ecx:=H
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mov eax,[esp+4] ; eax:=Ystart
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xor edx,edx ;
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div ecx ; Ystart/H
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mov eax,edx ; eax:=Rem
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xor edx,edx ;
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mov ebx,[esp+12] ; ebx:=B*3
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mul ebx ;
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add esi,eax ;
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mov eax,[esi+0x300000] ; color
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and eax,0xffffff
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mov ecx, [esp] ; LFB address
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mov ebx,eax ; copy color
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mov [ecx],bx
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shr ebx,16
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mov [ecx+2],bl
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xchg edi, ebp
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mov ecx,[esp+8] ; x position
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and ecx,0x07 ; x modulo 8
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call setvgapixel ; eax=color, ecx=x%8, edi=VGA address
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xchg ebp, edi
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pop ecx
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pop ebx
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pop eax
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nbgpvga:
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inc eax ; x++
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cmp eax,[draw_data+32+8] ; X > xend?
|
|
jg nodp3vga
|
|
|
|
test eax,0x07 ; x test modulo 8
|
|
jnz hook1vga
|
|
inc ebp ; VGA address++
|
|
|
|
hook1vga:
|
|
add ecx,4 ; LFB address += 4
|
|
inc edi ; ptrBuffer++
|
|
add esi,3 ; ptrImage+=3
|
|
jmp dp3vga
|
|
|
|
nodp3vga:
|
|
|
|
mov eax,[draw_data+32+0] ; x+Xwin
|
|
inc ebx ; y position
|
|
mov ecx,eax
|
|
mov edx,ebx
|
|
|
|
imul edx, 640*4 ; (y+Ywin)*BytesPerScanLine
|
|
shl ecx,2 ; (x+Xwin)*BytesPerPixel
|
|
add ecx,edx ;
|
|
mov ebp,ecx ; store copy
|
|
add ecx,[0xfe80] ; +AddrLFB
|
|
;entry point in LFB >> ECX:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+Addr
|
|
|
|
|
|
shr ebp,5 ; change from 4 to 1/8 BytesPerPixel
|
|
add ebp,0xa0000 ; + VGABasePtr
|
|
;VGA start address >> EBP:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+AddrV
|
|
|
|
|
|
call calculate_edi
|
|
|
|
cmp ebx,[draw_data+32+12] ; Y > yend
|
|
jg dp4vga
|
|
|
|
jmp dp3vga
|
|
|
|
dp4vga:
|
|
|
|
add esp,4
|
|
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
pop eax
|
|
pop ebp
|
|
|
|
ret
|
|
|
|
; ----------
|
|
|
|
|
|
|
|
vga_drawbackground_stretch:
|
|
|
|
|
|
push ebp
|
|
push eax
|
|
push ebx
|
|
push ecx
|
|
push edx
|
|
|
|
mov edx,dword [WinMapAddress-8] ; B
|
|
add edx,dword [WinMapAddress-8] ; +B
|
|
add edx,dword [WinMapAddress-8] ; +B
|
|
push edx
|
|
|
|
mov eax,[draw_data+32+0] ; x start:=(x+Xwin)
|
|
mov ebx,[draw_data+32+4] ; y start:=(y+Ywin)
|
|
mov ecx,eax
|
|
mov edx,ebx
|
|
|
|
imul edx, 640*4 ; (y+Ywin)*BytesPerScanLine
|
|
shl ecx,2 ; (x+Xwin)*BytesPerPixel
|
|
add ecx,edx ;
|
|
mov ebp,ecx ; store copy
|
|
add ecx,[0xfe80] ; +AddrLFB
|
|
;entry point in LFB >> ECX:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+Addr
|
|
|
|
shr ebp,5 ; change from 4 to 1/8 BytesPerPixel
|
|
add ebp,0xa0000 ; + VGABasePtr
|
|
;VGA start address >> EBP:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+AddrV
|
|
|
|
|
|
call calculate_edi
|
|
|
|
sdp3vga: ; MAIN LOOP
|
|
|
|
cmp [edi+WinMapAddress],byte 1 ; ptrBuffer^<>byte(1)
|
|
je sybgpvga
|
|
|
|
jmp snbgpvga
|
|
|
|
sybgpvga:
|
|
|
|
push eax ; x
|
|
push ebx ; y
|
|
push ecx ; LFB address
|
|
|
|
mov eax,dword [WinMapAddress-8] ; B
|
|
xor edx,edx
|
|
mov ebx,[esp+8] ; Xstart
|
|
mul ebx ; B*Xstart
|
|
xor edx,edx
|
|
mov ebx,[0xfe00] ; x screen width
|
|
div ebx ; B*Xstart/xwidth
|
|
lea esi,[eax+eax*2] ; *3
|
|
mov eax,dword [WinMapAddress-4] ; H
|
|
xor edx,edx
|
|
mov ebx,[esp+4] ; Ystart
|
|
mul ebx ; H*Ystart
|
|
xor edx,edx
|
|
mov ebx,[0xfe04] ; y screen height
|
|
div ebx ; H*Ystart/yheight
|
|
|
|
xor edx,edx
|
|
mov ebx,[esp+12] ; B*3
|
|
mul ebx ;
|
|
add esi,eax
|
|
mov eax,[esi+0x300000] ; color
|
|
and eax,0xffffff
|
|
|
|
mov ecx, [esp] ; LFB address
|
|
mov ebx,eax ; copy color
|
|
mov [ecx],bx
|
|
shr ebx,16
|
|
mov [ecx+2],bl
|
|
|
|
xchg edi, ebp
|
|
mov ecx,[esp+8] ; x position
|
|
and ecx,0x07 ; x modulo 8
|
|
call setvgapixel ; eax=color, ecx=x%8, edi=VGA address
|
|
xchg ebp, edi ; ebp+=3
|
|
|
|
pop ecx
|
|
pop ebx
|
|
pop eax
|
|
|
|
snbgpvga:
|
|
|
|
inc eax ; x++
|
|
cmp eax,[draw_data+32+8] ; X > xend?
|
|
jg snodp3vga
|
|
|
|
test eax,0x07 ; x test modulo 8
|
|
jnz shook1vga
|
|
inc ebp ; VGA address++
|
|
|
|
shook1vga:
|
|
add ecx,4 ; LFB address += 4
|
|
inc edi ; ptrBuffer++
|
|
add esi,3 ; ptrImage+=3
|
|
jmp sdp3vga
|
|
|
|
snodp3vga:
|
|
|
|
mov eax,[draw_data+32+0] ; x+Xwin
|
|
inc ebx ; y position
|
|
mov ecx,eax
|
|
mov edx,ebx
|
|
|
|
imul edx, 640*4 ; (y+Ywin)*BytesPerScanLine
|
|
shl ecx,2 ; (x+Xwin)*BytesPerPixel
|
|
add ecx,edx ;
|
|
mov ebp,ecx ; store copy
|
|
add ecx,[0xfe80] ; +AddrLFB
|
|
;entry point in LFB >> ECX:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+Addr
|
|
|
|
|
|
shr ebp,5 ; change from 4 to 1/8 BytesPerPixel
|
|
add ebp,0xa0000 ; + VGABasePtr
|
|
;VGA start address >> EBP:=(y+Ywin)*BytesPerScanLine+X*BytesPerPixel+A
|
|
|
|
|
|
call calculate_edi
|
|
|
|
cmp ebx,[draw_data+32+12] ; Y > yend
|
|
jg sdp4vga
|
|
|
|
jmp sdp3vga
|
|
|
|
sdp4vga:
|
|
|
|
add esp,4
|
|
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
pop eax
|
|
pop ebp
|
|
|
|
ret
|
|
|
|
|