mirror of https://github.com/nmlgc/ReC98.git
396 lines
7.3 KiB
NASM
396 lines
7.3 KiB
NASM
; superimpose & master library module
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;
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; Description:
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; パターンの表示(16x16/32x32限定, 4色以内, 画面上下連続)
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;
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; Functions/Procedures:
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; void z_super_roll_put_tiny_32x32( int left<ax>, int top<dx>, int num ) ;
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; void z_super_roll_put_tiny_16x16( int left<ax>, int top<dx>, int num ) ;
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;
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; Parameters:
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; x,y 描画する座標
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; num パターン番号
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;
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; Returns:
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; none
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;
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; Binding Target:
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; Microsoft-C / Turbo-C / Turbo Pascal
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;
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; Running Target:
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; PC-9801
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;
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; Requiring Resources:
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; CPU: V30
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; GRCG
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;
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; Notes:
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; z_super_roll_put_tiny_16x16() is a micro-optimized version of master.lib's
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; original super_roll_put_tiny(), used for drawing all sorts of 16×16
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; sprites in TH04 and TH05. Changes compared to the original:
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; • Procedure distance is NEAR rather than FAR.
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; • X and Y coordinates are passed in AX and DX, respectively, rather than
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; on the stack.
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; • Therefore, I removed the WIDE_RANGE branch, as it wouldn't have worked
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; with the changed register contents anyway.
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; • A small attempt to optimize the EVEN_COLOR_LOOP by jumping over the
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; blitting write of the third byte if it is blank.
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; ZUN then adapted this modified function for 32×32 pixel sprites.
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;
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; Compiler/Assembler:
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; TASM 3.0
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; OPTASM 1.6
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;
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; Author:
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; 恋塚(恋塚昭彦)
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; ZUN
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;
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; Revision History:
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; 93/ 9/19 Initial: superrpt.asm / master.lib 0.21
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;
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SCREEN_HEIGHT equ 400
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SCREEN_XBYTES equ 80
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GC_MODEREG equ 07ch
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GC_TILEREG equ 07eh
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GC_RMW equ 0c0h ; 書き込みﾋﾞｯﾄが立っているﾄﾞｯﾄにﾀｲﾙﾚｼﾞｽﾀから書く
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MRETURN macro
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pop DI
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pop SI
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pop DS
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ret 2 ; ZUN change, since only one parameter is passed via the stack
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EVEN
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endm
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srpt32x32_vram_topleft dw 0
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public Z_SUPER_ROLL_PUT_TINY_32X32_RAW
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z_super_roll_put_tiny_32x32_raw proc near
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; Parameters
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@@patnum = word ptr ss:[bx+2]
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@@left equ ax
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@@top equ dx
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; Locals
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@@PATTERN_HEIGHT = 32
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@@first_mask equ dl
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@@rows_left equ ch
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mov bx, sp
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push ds
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push si
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push di
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mov bx, @@patnum
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shl bx, 1
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mov ds, super_patdata[bx]
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mov bx, @@top
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shl bx, 2
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add bx, @@top
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shl bx, 4
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mov cx, @@left
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and cx, 7 ; CL = x & 7
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shr @@left, 3
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add bx, @@left
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mov cs:srpt32x32_vram_topleft, bx
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xor si, si
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lodsw
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cmp al, 80h ; is this tiny sprite data?
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jnz short @@RETURN
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mov @@first_mask, 0FFh
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shr @@first_mask, cl
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test bl, 1
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jnz short @@ODD_COLOR_LOOP
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@@EVEN_COLOR_LOOP:
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call grcg_setcolor_direct
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mov @@rows_left, @@PATTERN_HEIGHT
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mov di, cs:srpt32x32_vram_topleft
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cmp di, (RES_Y - @@PATTERN_HEIGHT + 1) * ROW_SIZE
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jb short @@EVEN_YLOOP2
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@@EVEN_YLOOP1:
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call put32_even
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cmp di, PLANE_SIZE
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jb short @@EVEN_YLOOP1
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sub di, PLANE_SIZE
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even
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@@EVEN_YLOOP2:
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call put32_even
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jnz short @@EVEN_YLOOP2
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lodsw
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cmp al, 80h
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jz short @@EVEN_COLOR_LOOP
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@@RETURN:
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MRETURN
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; ---------------------------------------------------------------------------
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@@ODD_COLOR_LOOP:
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call grcg_setcolor_direct
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mov @@rows_left, @@PATTERN_HEIGHT
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mov di, cs:srpt32x32_vram_topleft
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cmp di, (RES_Y - @@PATTERN_HEIGHT + 1) * ROW_SIZE
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jb short @@ODD_YLOOP2
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@@ODD_YLOOP1:
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call put32_odd
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cmp di, PLANE_SIZE
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jb short @@ODD_YLOOP1
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sub di, PLANE_SIZE
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nop
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@@ODD_YLOOP2:
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call put32_odd
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jnz short @@ODD_YLOOP2
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lodsw
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cmp al, 80h
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jz short @@ODD_COLOR_LOOP
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MRETURN
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; ---------------------------------------------------------------------------
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; void __usercall near grcg_setcolor_direct(uint4_t col<ah>);
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grcg_setcolor_direct:
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GRCG_SETCOLOR_DIRECT_INLINED ah
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ret
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even
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; ---------------------------------------------------------------------------
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; These put functions take:
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; • const planar32_t* row_color_pixels<ds:si>
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; • planar32_t* vram_offset<es:di>
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; • uint3_t first_bit<cl>
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; • uint8_t& rows_left<ch>
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; • planar8_t first_mask<dl>
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; [rows_left] is decremented at the end. ZF then indicates whether this was
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; the last row.
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@@first_bit equ cl
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@@words equ bh
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@@carry_pixels equ bl
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put32_even: ; if X is even
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xor @@carry_pixels, @@carry_pixels
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mov @@words, 2
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lodsd
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@@EVEN_WORD_LOOP:
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ror ax, @@first_bit
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mov dh, al
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and al, @@first_mask
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xor dh, al
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or al, @@carry_pixels
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mov @@carry_pixels, dh
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or ax, ax
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jz short @@EVEN_SKIP_BLANK_WORD
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mov es:[di], ax
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@@EVEN_SKIP_BLANK_WORD:
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add di, word
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shr eax, (8 * word)
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dec @@words
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jnz short @@EVEN_WORD_LOOP
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or @@carry_pixels, @@carry_pixels
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jz short @@EVEN_SKIP_BLANK_5TH
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mov es:[di], @@carry_pixels
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@@EVEN_SKIP_BLANK_5TH:
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add di, (ROW_SIZE - dword)
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dec @@rows_left
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retn
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even
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put32_odd: ; if X is odd
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mov @@words, 2
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lodsd ; EAX = the 32 pixels of this row
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ror al, @@first_bit
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mov @@carry_pixels, al
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and al, @@first_mask
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jz short @@ODD_SKIP_BLANK_1ST
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mov es:[di], al
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@@ODD_SKIP_BLANK_1ST:
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xor @@carry_pixels, al
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inc di
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shr eax, (8 * byte)
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@@ODD_WORD_LOOP:
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ror ax, @@first_bit
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mov dh, al
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and al, @@first_mask
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xor dh, al
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or al, @@carry_pixels
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mov @@carry_pixels, dh
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or ax, ax
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jz short @@ODD_SKIP_BLANK_WORD
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mov es:[di], ax
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@@ODD_SKIP_BLANK_WORD:
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add di, word
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shr eax, (8 * word)
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dec @@words
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jnz short @@ODD_WORD_LOOP
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add di, (ROW_SIZE - (dword + 1))
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dec @@rows_left
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retn
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Z_SUPER_ROLL_PUT_TINY_32X32_RAW endp
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public Z_SUPER_ROLL_PUT_TINY_16x16_RAW
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Z_SUPER_ROLL_PUT_TINY_16x16_RAW proc near ; z_super_roll_put_tiny_16x16_raw() {
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even
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mov BX,SP
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push DS
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push SI
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push DI
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@@num = 2
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@@PATTERN_HEIGHT = 16
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mov BX,SS:[BX+@@num]
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shl BX,1
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mov DS,super_patdata[BX]
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; SCREEN_XBYTES = 80 を想定
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mov BX,DX ; ZUN change, DI → DX
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shl BX,2
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add BX,DX ; ZUN change, DI → DX
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shl BX,4
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mov CX,AX ; ZUN change
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and CX,7 ; CL = x & 7
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shr AX,3
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add BX,AX ; BX = draw start offset
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xor SI,SI
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lodsw
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cmp AL,80h
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jnz short @@RETURN ; １色もないとき(おいおい)
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mov DL,0ffh ; DL = ワード境界マスク
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shr DL,CL
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test BL,1 ; ZUN change, BX → BL
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jnz short @@ODD_COLOR_LOOP
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EVEN
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; 偶数アドレス
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@@EVEN_COLOR_LOOP:
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; 色の指定あるね
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REPT 4
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shr AH,1
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sbb AL,AL
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out GC_TILEREG,AL
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ENDM
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mov CH,@@PATTERN_HEIGHT
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mov DI,BX
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cmp DI,(SCREEN_HEIGHT-@@PATTERN_HEIGHT+1)*SCREEN_XBYTES
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jb short @@EVEN_YLOOP2
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EVEN
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@@EVEN_YLOOP1:
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lodsw
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ror AX,CL
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mov DH,AL
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and AL,DL
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mov ES:[DI],AX
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xor AL,DH
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jz @@EVEN_YLOOP1_SKIP_BLANK_3RD
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mov ES:[DI+2],AL
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@@EVEN_YLOOP1_SKIP_BLANK_3RD:
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add DI,SCREEN_XBYTES
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dec CH
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cmp DI,SCREEN_HEIGHT*SCREEN_XBYTES
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jb short @@EVEN_YLOOP1
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sub DI,SCREEN_HEIGHT*SCREEN_XBYTES
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EVEN
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@@EVEN_YLOOP2:
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lodsw
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ror AX,CL
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mov DH,AL
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and AL,DL
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mov ES:[DI],AX
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xor AL,DH
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jz @@EVEN_YLOOP2_SKIP_BLANK_3RD
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mov ES:[DI+2],AL
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@@EVEN_YLOOP2_SKIP_BLANK_3RD:
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add DI,SCREEN_XBYTES
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dec CH
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jnz short @@EVEN_YLOOP2
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@@EVEN_YLOOP_END:
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lodsw
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cmp AL,80h
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je short @@EVEN_COLOR_LOOP
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@@RETURN:
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MRETURN
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EVEN
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; 奇数アドレス
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@@ODD_COLOR_LOOP:
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; 色の指定あるね
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REPT 4
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shr AH,1
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sbb AL,AL
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out GC_TILEREG,AL
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ENDM
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mov CH,@@PATTERN_HEIGHT
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mov DI,BX
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cmp DI,(SCREEN_HEIGHT-@@PATTERN_HEIGHT+1)*SCREEN_XBYTES
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jb short @@ODD_YLOOP2
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EVEN
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@@ODD_YLOOP1:
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lodsw
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ror AX,CL
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mov DH,AL
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and AL,DL
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mov ES:[DI],AL
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xor AL,DH
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xchg AH,AL
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mov ES:[DI+1],AX
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add DI,SCREEN_XBYTES
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dec CH
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cmp DI,SCREEN_HEIGHT*SCREEN_XBYTES
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jb short @@ODD_YLOOP1
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sub DI,SCREEN_HEIGHT*SCREEN_XBYTES
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EVEN
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@@ODD_YLOOP2:
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lodsw
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ror AX,CL
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mov DH,AL
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and AL,DL
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mov ES:[DI],AL
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xor AL,DH
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xchg AH,AL
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mov ES:[DI+1],AX
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add DI,SCREEN_XBYTES
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dec CH
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jnz short @@ODD_YLOOP2
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@@ODD_YLOOP_END:
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lodsw
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cmp AL,80h
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je short @@ODD_COLOR_LOOP
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MRETURN
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Z_SUPER_ROLL_PUT_TINY_16x16_RAW endp ; }
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