位图模糊

じ☆ve冰风

边学边练，直接上代码

RUBY 代码

1. class Bitmap
2.   dll = "Blur.dll"
4.   GetValue = Win32API.new(dll, 'GetValue', 'LLLLL', 'L')
5.   Blur = Win32API.new(dll, 'bitmapBlur', 'LL', 'V')
6.   ExpBlur = Win32API.new(dll, 'bitmapExpBlur', 'LLLL', 'V')
7.   GaussBlur = Win32API.new(dll, 'bitmapGaussBlur', 'LL', 'V')
9.   def to_int
10.     self.object_id
11.   end
13.   def hBitmap
14.     @_hBitmap ||= GetValue.call(self, 16, 8, 44, 0)
15.   end
17.   def pBits
18.     @_pBits ||= GetValue.call(self, 16, 8, 16, 0)
19.   end
21.   def pScan0
22.     @_pScan0 ||= GetValue.call(self, 16, 8, 12, 0)
23.   end
25.   def pIHr
26.     @_pIHr ||= GetValue.call(self, 16, 8, 8, 0)
27.   end
29.   # 简单快速的模糊，“第一行”与“最后一行”未处理；简单的看作半径1的模糊
30.   # 具体计算用SSE的pavgb实现
31.   # width >= 8 && height > 3
32.   def main_blur!(exchg_times = 0)
33.     Blur.call(self, exchg_times)
34.   end
36.   # 网上的算法，效率与半径无关，纯C实现
37.   def expBlur!(radius = 1, aprec = 16, zprec = 7)
38.     ExpBlur.call(self, radius, aprec, zprec)
39.   end
41.   # 网上的算法，效率与半径无关，具体计算用内嵌汇编SSE实现
42.   # C函数半径参数为单精度，为了避免转换类型，写成百分比数  250 => 2.5
43.   def gaussBlur!(radius_percent = 100)
44.     GaussBlur.call(self, radius_percent)
45.   end
48.   BlurEffectGuid = [0x633C80A4, 0x482B1843, 0x28BEF29E, 0xD4FDC534]
49.   BrightnessContrastEffectGuid = [0xD3A1DBE1,0x4C178EC4,0x97EA4C9F,0x3D341CAD]
50.   ColorBalanceEffectGuid = [0x537E597D, 0x48DA251E, 0xCA296496, 0xF8706B49]
51.   ColorCurveEffectGuid = [0xDD6A0022, 0x4A6758E4, 0x8ED49B9D, 0x3DA581B8]
52.   ColorLUTEffectGuid = [0xA7CE72A9, 0x40D70F7F, 0xC0D0CCB3, 0x12325C2D]
53.   ColorLookupTableEffectGuid = ColorLUTEffectGuid
54.   ColorMatrixEffectGuid = [0x718F2615, 0x40E37933, 0x685F11A5, 0x74DD14FE]
55.   HSLEffectGuid = [0x8B2DD6C3, 0x4D87EB07, 0x0871F0A5, 0x5F9C6AE2]
56.   HueSaturationLightnessEffectGuid =  HSLEffectGuid   
57.   LevelsEffectGuid = [0x99C354EC, 0x4F3A2A31, 0xA817348C, 0x253AB303]
58.   RECEffectGuid = [0x74D29D05, 0x426669A4, 0xC53C4995, 0x32B63628]
59.   RedEyeCorrectionEffectGuid = RECEffectGuid
60.   SharpenEffectGuid = [0x63CBF3EE, 0x402CC526, 0xC562718F, 0x4251BF40]
61.   TintEffectGuid = [0x1077AF00, 0x44412848, 0xAD448994, 0x2C7A2D4C]
63.   #PixelFormat32bppARGB = 0x26200A
64.   #ImageLockModeRead = 1
65.   #ImageLockModeWrite = 2
66.   #ImageLockModeUserInputBuf = 4
68.   gdip = "gdiplus.dll"
70.   GdiplusStartup = Win32API.new(gdip, 'GdiplusStartup', 'PPP', 'I')
71.   GdiplusShutdown = Win32API.new(gdip, 'GdiplusShutdown', 'L', 'V')
72.   GdipStartupInput = [1, 0, 0, 0].pack('L4')
74.   CreateBitmapFromHBITMAP =
75.     Win32API.new(gdip, 'GdipCreateBitmapFromHBITMAP', 'LLP', 'I')
77.   DisposeImage = Win32API.new(gdip, 'GdipDisposeImage', 'L', 'I')
79.   # CreateEffect = Win32API.new(gdip, 'GdipCreateEffect', 'PP', 'I')
80.   # 该API第一个参数类型Guid，可以看作一个16bytes结构，
81.   # 需要其所有成员完全进栈，而不是其地址
82.   # RMXP中没有此结构，所以拓展参数
83.   CreateEffectGuidP = Win32API.new(gdip, 'GdipCreateEffect', 'LLLLP', 'I')
84.   CreateEffect = lambda{|guid, buf|
85.     CreateEffectGuidP.call(guid[0], guid[1], guid[2], guid[3], buf)
86.   }
88.   BitmapApplyEffect = Win32API.new(gdip, 'GdipBitmapApplyEffect','LLPIPP','I')  
89.   DeleteEffect = Win32API.new(gdip, 'GdipDeleteEffect', 'L', 'I')
90.   SetEffectParams = Win32API.new(gdip,'GdipSetEffectParameters', 'LPL', 'I')
92.   BitmapLockBits = Win32API.new(gdip, 'GdipBitmapLockBits', 'LPLLP', 'I')
93.   BitmapUnlockBits = Win32API.new(gdip, 'GdipBitmapUnlockBits', 'LP', 'I')
96.   # 半径越大，效率越低
97.   def gdiplus_blur!(radius, rx = 0, ry = 0, rw = nil, rh = nil)
98.     buf = "\0" * 4
100.     GdiplusStartup.call(buf, GdipStartupInput, nil)
101.     token = buf.unpack('L')[0]
103.     CreateBitmapFromHBITMAP.call(self.hBitmap, 0, buf)
104.     pBitmap = buf.unpack('L')[0]
106.     CreateEffect.call(BlurEffectGuid, buf)
107.     pBlurEffect = buf.unpack('L')[0]
109.     # gdiplus 不同效果的效果参数结构不同，自行百度
110.     blurParams = [radius, 0].pack('fI')
111.     SetEffectParams.call(pBlurEffect, blurParams, blurParams.size)
113.     w, h = self.width, self.height
114.     rw, rh = rw || w, rh || h
116.     rect = [rx, ry, rx + rw, ry + rh].pack('iiII')
117.     BitmapApplyEffect.call(pBitmap, pBlurEffect, rect, 0, nil, nil)
119.     #PixelFormat32bppARGB => 0x26200A
120.     stride = w * -4
121.     scan0 = self.pScan0 + rx * 4 + ry * stride
122.     lockedBmpData = [rw, rh, stride, 0x26200A, scan0, 0].pack('IIiI3')
124.     #ImageLockModeUserInputBuf | ImageLockModeRead => 5
125.     BitmapLockBits.call(pBitmap, rect, 5, 0x26200A, lockedBmpData)
126.     BitmapUnlockBits.call(pBitmap, lockedBmpData)
128.     DisposeImage.call(pBitmap)
129.     DeleteEffect.call(pBlurEffect)
130.     GdiplusShutdown.call(token)
131.   end   
132. end

复制代码

简单的测试，希望可以回复一下次数

RUBY 代码
[code]src = Bitmap.new(640, 480)  # 观看效果的话，换成图片，注释掉下面一行代码
src.fill_rect(src.rect, Color.new(0, 255, 255))
dst = src.clone
sprite = Sprite.new
sprite.bitmap = dst


count, t = 0, Time.now
loopdo
  dst.main_blur!(1)
  breakifTime.now - t >= 1.0
  count += 1
end
str = "blur => #{count}次/秒\n"  # 195次/秒……

count, t = 0, Time.now
loopdo
  dst.expBlur!(2, 16, 7)
  breakifTime.now - t >= 1.0
  count += 1
end
str = 1.0
  count += 1
end
str = 1.0
  count += 1
end
str