mirror of https://github.com/nmlgc/ReC98.git
[Decompilation] [th01] 32×32 square inversion on a single bitplane
The main effect behind the discoloration seen in the bomb animation, as well as the exploding squares at the end of Kikuri's and Sariel's entrance animation. Single-function segments are lovely, by the way! Part of P0121, funded by Yanga.
This commit is contained in:
nmlgc
parent
37d191d903
commit
60ee6e94fc
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@ -51,7 +51,7 @@ bin\th01\op.exe: bin\piloadc.obj bin\th01\op.obj th01\op_01.cpp th01\op_02.c th0
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$**
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bin\th01\reiiden.exe: bin\piloadc.obj bin\th01\reiiden.obj th01\main_01.cpp th01\main_01_.cpp th01\main_02.c th01\main_03.c th01\main_04.c th01\main_05.c th01\main_06.cpp th01\main_07.cpp th01\main_08.cpp th01\main_09.cpp th01\main_12.c th01\main_13.cpp th01\main_13_.cpp th01\main_14.cpp th01\main_16.c th01\main_19.cpp th01\main_21.cpp th01\main_23.cpp th01\main_25.cpp th01\main_27.cpp th01\main_30.cpp th01\main_38.cpp
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bin\th01\reiiden.exe: bin\piloadc.obj bin\th01\reiiden.obj th01\main_01.cpp th01\main_01_.cpp th01\main_02.c th01\main_03.c th01\main_04.c th01\main_05.c th01\main_06.cpp th01\main_07.cpp th01\main_08.cpp th01\main_09.cpp th01\grpinv32.cpp th01\main_12.c th01\main_13.cpp th01\main_13_.cpp th01\main_14.cpp th01\main_16.c th01\main_19.cpp th01\main_21.cpp th01\main_23.cpp th01\main_25.cpp th01\main_27.cpp th01\main_30.cpp th01\main_38.cpp
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$(CC) $(CFLAGS) -ml -3 -DGAME=1 -DBINARY='M' -nbin\th01\ -eREIIDEN.EXE @&&|
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$**
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@ -0,0 +1,4 @@
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#pragma codeseg main_11_TEXT
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#pragma option -2
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#include "th01/hardware/grpinv32.cpp"
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@ -0,0 +1,23 @@
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#include "platform.h"
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#include "pc98.h"
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#include "planar.h"
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#include "th01/hardware/grpinv32.hpp"
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bool16 graph_invert_32x32_8(screen_x_t left, vram_y_t top, dots8_t far *plane)
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{
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vram_offset_t vram_offset = vram_offset_shift(left, top);
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if(
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(left < 0) ||
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(top < 0) ||
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(left >= (RES_X - 32)) ||
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(top >= (RES_Y - 32))
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) {
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return true;
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}
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for(pixel_t y = 0; y < 32; y++, vram_offset += ROW_SIZE) {
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reinterpret_cast<dots32_t far &>(plane[vram_offset]) ^= -1;
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}
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return false;
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}
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@ -0,0 +1,4 @@
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// Inverts the 32×32 square at (⌊left/8⌋*8, top) on the given VRAM [plane].
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// Returns true if the square is not fully within the boundaries of VRAM and
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// was not inverted, false otherwise.
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bool16 graph_invert_32x32_8(screen_x_t left, vram_y_t top, dots8_t far *plane);
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202
th01_reiiden.asm
202
th01_reiiden.asm
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@ -1348,8 +1348,8 @@ loc_C23F: ; ...
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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mov word_3876D, ax
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add ax, 304
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mov _square_left, ax
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mov ax, [bp+@@frame]
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add ax, -50
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imul ax, 6
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@ -1362,13 +1362,9 @@ loc_C23F: ; ...
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B8h ; '¸'
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mov word_387A3, ax
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pushd [_VRAM_PLANE_B]
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push ax
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push word_3876D
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call sub_1156E
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add sp, 8
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add ax, 184
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mov _square_top, ax
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call @graph_invert_32x32_8$qiinuc c, _square_left, ax, large [_VRAM_PLANE_B]
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mov ax, [bp+@@frame]
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add ax, -50
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imul ax, 7
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@ -1381,8 +1377,8 @@ loc_C23F: ; ...
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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mov word_3876D, ax
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add ax, 304
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mov _square_left, ax
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mov ax, [bp+@@frame]
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add ax, -50
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imul ax, 7
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@ -1395,13 +1391,9 @@ loc_C23F: ; ...
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B8h ; '¸'
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mov word_387A3, ax
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pushd [_VRAM_PLANE_B]
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push ax
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push word_3876D
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call sub_1156E
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add sp, 8
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add ax, 184
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mov _square_top, ax
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call @graph_invert_32x32_8$qiinuc c, _square_left, ax, large [_VRAM_PLANE_B]
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mov ax, [bp+@@frame]
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add ax, -50
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shl ax, 3
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@ -1414,8 +1406,8 @@ loc_C23F: ; ...
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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mov word_3876D, ax
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add ax, 304
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mov _square_left, ax
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mov ax, [bp+@@frame]
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add ax, -50
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shl ax, 3
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@ -1428,13 +1420,9 @@ loc_C23F: ; ...
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B8h ; '¸'
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mov word_387A3, ax
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pushd [_VRAM_PLANE_B]
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push ax
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push word_3876D
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call sub_1156E
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add sp, 8
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add ax, 184
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mov _square_top, ax
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call @graph_invert_32x32_8$qiinuc c, _square_left, ax, large [_VRAM_PLANE_B]
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inc si
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mov al, angle_387D9
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add al, 10h
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@ -4548,76 +4536,7 @@ main_10_TEXT ends
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; Segment type: Pure code
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main_11_TEXT segment byte public 'CODE' use16
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assume cs:main_11_TEXT
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;org 0Eh
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assume es:nothing, ss:nothing, ds:_DATA, fs:nothing, gs:nothing
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; =============== S U B R O U T I N E =======================================
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; Attributes: bp-based frame
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sub_1156E proc far
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var_2 = word ptr -2
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arg_0 = word ptr 6
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arg_2 = word ptr 8
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arg_4 = dword ptr 0Ah
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enter 2, 0
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push si
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push di
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mov si, [bp+arg_0]
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mov cx, [bp+arg_2]
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mov ax, si
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sar ax, 3
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mov dx, cx
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shl dx, 6
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add ax, dx
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mov dx, cx
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shl dx, 4
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add ax, dx
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mov di, ax
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or si, si
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jl short loc_115A3
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or cx, cx
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jl short loc_115A3
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cmp si, 260h
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jge short loc_115A3
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cmp cx, 170h
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jl short loc_115A8
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loc_115A3:
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mov ax, 1
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jmp short loc_115CB
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; ---------------------------------------------------------------------------
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loc_115A8:
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mov [bp+var_2], 0
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jmp short loc_115C3
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; ---------------------------------------------------------------------------
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loc_115AF:
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les bx, [bp+arg_4]
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add bx, di
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xor word ptr es:[bx], 0FFFFh
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xor word ptr es:[bx+2], 0FFFFh
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inc [bp+var_2]
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loc_115C0:
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add di, 50h ; 'P'
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loc_115C3:
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cmp [bp+var_2], 20h ; ' '
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jl short loc_115AF
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xor ax, ax
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loc_115CB:
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pop di
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pop si
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leave
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retf
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sub_1156E endp
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extern @graph_invert_32x32_8$qiinuc:proc
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main_11_TEXT ends
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; ===========================================================================
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@ -28714,11 +28633,11 @@ loc_248B0:
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; ---------------------------------------------------------------------------
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loc_248BE:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28731,12 +28650,12 @@ loc_248BE:
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movsx eax, _CosTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 0B4h ; '?'
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push dx
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add dx, 180
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push dx ; top
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28749,9 +28668,9 @@ loc_248BE:
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movsx eax, _SinTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 130h
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push dx
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call sub_1156E
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add dx, 304
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push dx ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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inc si
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@ -28776,11 +28695,11 @@ loc_24941:
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; ---------------------------------------------------------------------------
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loc_2495E:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28793,12 +28712,12 @@ loc_2495E:
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movsx eax, _CosTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 0B4h ; '?'
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push dx
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add dx, 180
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push dx ; top
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28811,9 +28730,9 @@ loc_2495E:
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movsx eax, _SinTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 130h
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push dx
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call sub_1156E
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add dx, 304
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push dx ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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inc si
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@ -28828,11 +28747,11 @@ loc_249D8:
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; ---------------------------------------------------------------------------
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loc_249EA:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28845,12 +28764,12 @@ loc_249EA:
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movsx eax, _CosTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 0B4h ; '?'
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push dx
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add dx, 180
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push dx ; top
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movsx eax, word_3A6C4
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push eax
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mov ax, si
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mov bx, 20h ; ' '
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mov bx, 32
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cwd
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idiv bx
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cwde
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@ -28863,9 +28782,9 @@ loc_249EA:
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movsx eax, _SinTable8[bx]
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imul edx, eax
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sar edx, 8
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add dx, 130h
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push dx
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call sub_1156E
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add dx, 304
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push dx ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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add di, ax
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inc si
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@ -41088,7 +41007,7 @@ loc_2C162:
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; ---------------------------------------------------------------------------
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loc_2C16E:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41101,8 +41020,8 @@ loc_2C16E:
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B4h ; '?'
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push ax
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add ax, 180
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push ax ; top
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41115,9 +41034,9 @@ loc_2C16E:
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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push ax
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call sub_1156E
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add ax, 304
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push ax ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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inc si
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@ -41141,7 +41060,7 @@ loc_2C1E5:
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; ---------------------------------------------------------------------------
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loc_2C202:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41154,8 +41073,8 @@ loc_2C202:
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B4h ; '?'
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push ax
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add ax, 180
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push ax ; top
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41168,9 +41087,9 @@ loc_2C202:
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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push ax
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call sub_1156E
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add ax, 304
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push ax ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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inc si
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@ -41184,7 +41103,7 @@ loc_2C270:
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; ---------------------------------------------------------------------------
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loc_2C282:
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pushd [_VRAM_PLANE_R]
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pushd [_VRAM_PLANE_R] ; plane
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41197,8 +41116,8 @@ loc_2C282:
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movsx edx, _CosTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 0B4h ; '?'
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push ax
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add ax, 180
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push ax ; top
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movsx eax, word_3B435
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mov dx, si
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shr dx, 5
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@ -41211,9 +41130,9 @@ loc_2C282:
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movsx edx, _SinTable8[bx]
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imul eax, edx
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sar eax, 8
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add ax, 130h
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push ax
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call sub_1156E
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add ax, 304
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push ax ; left
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call @graph_invert_32x32_8$qiinuc
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add sp, 8
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add di, ax
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inc si
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@ -47893,9 +47812,10 @@ byte_38723 db ?
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db 24 dup(?)
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palette_3873C palette_t <?>
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byte_3876C db ?
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word_3876D dw ?
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public _square_left, _square_top
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_square_left dw ?
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db 52 dup(?)
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word_387A3 dw ?
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_square_top dw ?
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db 52 dup(?)
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angle_387D9 db ?
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include th01/main/player/inv_spr[bss].asm
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