77 lines
4.6 KiB
NASM
77 lines
4.6 KiB
NASM
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match =MMX, COMPOSITE_MODE {include 'blend_mmx.asm'}
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match =SSE, COMPOSITE_MODE {include 'blend_sse.asm'}
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;;============================================================================;;
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proc img.blend uses ebx esi edi, _bottom, _top, _xbottom, _ybottom, \ ;///////;;
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_xtop, _ytop, _width, _height ;//////////////;;
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;;----------------------------------------------------------------------------;;
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;? Alpha blend _top image to _bottom one (both must be of type Image.bpp32) ;;
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;;----------------------------------------------------------------------------;;
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;> _bottom = pointer to bottom image (will be changed) ;;
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;> _top = pointer to top image (unchanged) ;;
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;> _xbottom = x coord inside _bottom image where to put _top image ;;
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;> _ybottom = y coord inside _bottom image where to put _top image ;;
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;> _xtop = x coord inside _top image to start from ;;
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;> _ytop = y coord inside _top image to start from ;;
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;> _width = width of _top image area to put to _bottom image ;;
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;> _height = height of _top image area to put to _bottom image ;;
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;;----------------------------------------------------------------------------;;
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;< eax = 0 (fail) / _bottom (ok) ;;
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;;============================================================================;;
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mov esi, [_top]
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mov edi, [_bottom]
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mov eax, [esi+Image.Width]
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sub eax, [_width]
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shl eax, 2
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push eax
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mov eax, [edi+Image.Width]
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sub eax, [_width]
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shl eax, 2
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push eax
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mov eax, [_ytop]
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imul eax, [esi+Image.Width]
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add eax, [_xtop]
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shl eax, 2
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mov esi, [esi+Image.Data]
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add esi, eax
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mov eax, [_ybottom]
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imul eax, [edi+Image.Width]
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add eax, [_xbottom]
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shl eax, 2
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mov edi, [edi+Image.Data]
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add edi, eax
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stdcall xcf._.composite_rgb_00, [_width], [_height]
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mov eax, [_bottom]
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ret
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endp
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xcf._.composite_table.begin:
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.p00 dd 00, xcf._.composite_rgb_00, xcf._.composite_gray_00, xcf._.composite_indexed_00 ; Normal
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.p01 dd 01, xcf._.composite_rgb_01, xcf._.composite_gray_01, xcf._.composite_gray_01 ; Dissolve : random dithering to discrete alpha
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; .p02 dd 02, xcf._.composite_rgb_02, 0, xcf._.composite_indexed_02 ; Behind : not selectable in the GIMP UI. not implemented
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.p03 dd 03, xcf._.composite_rgb_03, xcf._.composite_rgb_03, xcf._.composite_indexed_00 ; Multiply
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.p04 dd 04, xcf._.composite_rgb_04, xcf._.composite_rgb_04, xcf._.composite_indexed_00 ; Screen
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.p05 dd 05, xcf._.composite_rgb_05, xcf._.composite_rgb_05, xcf._.composite_indexed_00 ; Overlay
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.p06 dd 06, xcf._.composite_rgb_06, xcf._.composite_rgb_06, xcf._.composite_indexed_00 ; Difference
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.p07 dd 07, xcf._.composite_rgb_07, xcf._.composite_rgb_07, xcf._.composite_indexed_00 ; Addition
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.p08 dd 08, xcf._.composite_rgb_08, xcf._.composite_rgb_08, xcf._.composite_indexed_00 ; Subtract
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.p09 dd 09, xcf._.composite_rgb_09, xcf._.composite_rgb_09, xcf._.composite_indexed_00 ; Darken Only
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.p10 dd 10, xcf._.composite_rgb_10, xcf._.composite_rgb_10, xcf._.composite_indexed_00 ; Lighten Only
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.p11 dd 11, xcf._.composite_rgb_11, xcf._.composite_gray_00, xcf._.composite_indexed_00 ; Hue (H of HSV)
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.p12 dd 12, xcf._.composite_rgb_12, xcf._.composite_gray_00, xcf._.composite_indexed_00 ; Saturation (S of HSV)
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.p13 dd 13, xcf._.composite_rgb_13, xcf._.composite_gray_00, xcf._.composite_indexed_00 ; Color (H and S of HSL)
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.p14 dd 14, xcf._.composite_rgb_14, xcf._.composite_gray_00, xcf._.composite_indexed_00 ; Value (V of HSV)
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.p15 dd 15, xcf._.composite_rgb_15, xcf._.composite_rgb_15, xcf._.composite_indexed_00 ; Divide
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.p16 dd 16, xcf._.composite_rgb_16, xcf._.composite_rgb_16, xcf._.composite_indexed_00 ; Dodge
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.p17 dd 17, xcf._.composite_rgb_17, xcf._.composite_rgb_17, xcf._.composite_indexed_00 ; Burn
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.p18 dd 18, xcf._.composite_rgb_18, xcf._.composite_rgb_18, xcf._.composite_indexed_00 ; Hard Light
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.p19 dd 19, xcf._.composite_rgb_05, xcf._.composite_rgb_05, xcf._.composite_indexed_00 ; Soft Light : XCF >= 2 only ('soft light' == 'overlay')
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.p20 dd 20, xcf._.composite_rgb_20, xcf._.composite_rgb_20, xcf._.composite_indexed_00 ; Grain Extract : XCF >= 2 only
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.p21 dd 21, xcf._.composite_rgb_21, xcf._.composite_rgb_21, xcf._.composite_indexed_00 ; Grain Merge : XCF >= 2 only
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xcf._.composite_table.end:
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