Created
January 3, 2021 19:23
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class Bitmap | |
#-------------------------------------------------------------------------- | |
# ○ クリッピング描画 | |
# reg_bitmap : リージョン画像(黒部分を非表示) | |
#-------------------------------------------------------------------------- | |
def clip_blt2(x, y, src_bitmap, src_rect, reg_bitmap) | |
return -1 if TRGSSX::NO_TRGSSX | |
apt, ai, flag = [], [], false | |
(reg_bitmap.height-1).downto(0) do |y| | |
(reg_bitmap.width).times do |x| | |
if x+1 == reg_bitmap.width || reg_bitmap.get_pixel(x, y).red == 0 | |
if flag | |
apt.push([x,y+1], [x,y]) | |
ai << 4 | |
flag = false | |
end | |
else | |
apt.push([x,y], [x,y+1]) unless flag | |
flag = true | |
end | |
end | |
end | |
cppr = Win32API.new('gdi32', 'CreatePolyPolygonRgn', 'ppll', 'l') | |
ppt = apt.inject("") {|r,pt| r << pt.pack("ll") } | |
pai = ai.pack("l*") | |
hRgn = cppr.call(ppt, pai, ai.size, 2) | |
return if hRgn == nil || hRgn == 0 | |
result = TRGSSX.clip_blt(get_base_info, | |
x, y, src_rect.width, src_rect.height, | |
src_bitmap.get_base_info, src_rect.x, src_rect.y, hRgn) | |
# 後始末 | |
Region.delete_region_handles | |
return result | |
end | |
end |
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KAMESOFT さんの『ビットマップ拡張』使用し、画像でマスク処理