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0f3359e1b3
Which finally allows us to use the PLANE_SIZE macro in ASM land. Yeah, (ROW_SIZE * RES_Y) has finally got old. Part of P0073, funded by [Anonymous] and -Tom-.
89 lines
1.3 KiB
NASM
89 lines
1.3 KiB
NASM
public BGIMAGE_SNAP
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bgimage_snap proc far
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push si
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push di
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cmp bgimage_PL_B, 0
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jnz short @@already_allocated
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call hmem_allocbyte pascal, PLANE_SIZE
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mov bgimage_PL_B, ax
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call hmem_allocbyte pascal, PLANE_SIZE
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mov bgimage_PL_R, ax
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call hmem_allocbyte pascal, PLANE_SIZE
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mov bgimage_PL_G, ax
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call hmem_allocbyte pascal, PLANE_SIZE
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mov bgimage_PL_E, ax
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@@already_allocated:
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mov dl, 4
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push ds
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push 0E000h
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push bgimage_PL_E
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push 0B800h
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push bgimage_PL_G
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push 0B000h
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push bgimage_PL_R
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push 0A800h
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push bgimage_PL_B
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@@next_plane:
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pop es
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pop ds
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xor si, si
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xor di, di
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mov cx, (PLANE_SIZE / 4)
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rep movsd
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dec dl
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jnz short @@next_plane
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pop ds
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pop di
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pop si
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retf
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bgimage_snap endp
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public BGIMAGE_PUT
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bgimage_put proc far
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push si
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push di
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mov dl, 4
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push ds
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push 0E000h
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push bgimage_PL_E
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push 0B800h
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push bgimage_PL_G
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push 0B000h
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push bgimage_PL_R
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push 0A800h
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push bgimage_PL_B
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@@next_plane:
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pop ds
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pop es
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xor si, si
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xor di, di
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mov cx, (PLANE_SIZE / 4)
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rep movsd
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dec dl
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jnz short @@next_plane
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pop ds
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pop di
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pop si
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retf
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bgimage_put endp
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even
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public BGIMAGE_FREE
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bgimage_free proc far
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cmp bgimage_PL_B, 0
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jz short @@ret
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call hmem_free pascal, bgimage_PL_B
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call hmem_free pascal, bgimage_PL_R
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call hmem_free pascal, bgimage_PL_G
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call hmem_free pascal, bgimage_PL_E
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mov bgimage_PL_B, 0
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@@ret:
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retf
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bgimage_free endp
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