有关截图图片转换为PNG的方法

API_Studier · 发表于 2011-6-19 14:42:59

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本帖最后由 fux2 于 2011-6-19 18:38 编辑

本人想把GetBitmapBits得到的BMP格式转化为PNG，可是得到的是BGRA通道，而PNG中是RGBA，所以直接得到的图像很难看（红蓝通道相反），但是如果每个BGRA数组翻转成RGBA时间又太长，如下代码需要约20秒才能生成一个PNG文件，请高人相助！

class << Graphics
CreateCompatibleBitmap = Win32API.new("gdi32", "CreateCompatibleBitmap", "lll", "l")
CreateCompatibleDC = Win32API.new("gdi32", "CreateCompatibleDC", "l", "l")
SelectObject = Win32API.new("gdi32", "SelectObject", "ll", "l")
BitBlt = Win32API.new("gdi32", "BitBlt", "lllllllll", "l")
GetBitmapBits = Win32API.new("gdi32", "GetBitmapBits", "llp", "l")
ScreenToClient = Win32API.new("user32", "ScreenToClient", "ip", "i")
DeleteDC = Win32API.new("gdi32", "DeleteDC", "l", "l")
DeleteObject = Win32API.new("gdi32", "DeleteObject", "l", "l")
CrFnt = Win32API.new("gdi32","CreateFont","l"*13+"p","l")
SRCCOPY = 0xCC0020
DwCount = (640 * 480 * 4) * 2
@@lpBits = "\000" * DwCount
def bitmap_data(times)
hScrDC = $hDC
hMemDC = CreateCompatibleDC.call(hScrDC)
hBitmap = CreateCompatibleBitmap.call(hScrDC, 640, 480)
SelectObject.call(hMemDC, hBitmap)
BitBlt.call(hMemDC, 0, 0, 640*2, 480*2, hScrDC, 0, 0, SRCCOPY)
rect = [0,0,300,100].pack("llll")
hfont = CrFnt.call(20,10,50,0,1500,1,0,0,0,0,0,0,0,"Lucida Sans")
Win32API.new("gdi32","SetBkColor","ll","l").call(hMemDC,255)
Win32API.new("gdi32","SetTextColor","ll","l").call(hMemDC,16777215)
SelectObject.call(hMemDC,hfont)
Win32API.new("user32","DrawText","lplpl","l").call(hMemDC,"2012 Doomsday Replay #{times}:",-1,rect,0x37)
GetBitmapBits.call(hBitmap, DwCount, @@lpBits)
DeleteDC.call(hScrDC)
DeleteDC.call(hMemDC)
DeleteObject.call(hBitmap)
DeleteObject.call(hfont)
for i in 1..307200
if i%100000 == 0 then Graphics.update end
@@lpBits[4*i-4,3]=@@lpBits[4*i-4,3].reverse # 翻转红蓝通道,这个时间有点长，求高手帮忙！
#RGBA #BGRA
@@lpBits[4*i-1]=255
end
return @@lpBits
end
end
class Png_File
#--------------------------------------------------------------------------
# ● 主处理
#--------------------------------------------------------------------------
def initialize(times)
@times=times
f = File.open("Graphics/Pictures/Replay#{@times}.png","wb")#Zlib::GzipWriter.open("Graphics/Pictures/Replay#{times}.png")
f.write(make_header)
f.write(make_ihdr)
f.write(make_idat)
f.write(make_iend)
f.close
end
#--------------------------------------------------------------------------
# ● PNG文件头数据块
#--------------------------------------------------------------------------
def make_header
return [0x89,0x50,0x4e,0x47,0x0d,0x0a,0x1a,0x0a].pack("C*")
end
#--------------------------------------------------------------------------
# ● PNG文件情报头数据块(IHDR)
#--------------------------------------------------------------------------
def make_ihdr
ih_size = [13].pack("N")
ih_sign = "IHDR"
ih_width = [640].pack("N")
ih_height = [480].pack("N")
ih_bit_depth = [8].pack("C")
ih_color_type = [6].pack("C")
ih_compression_method = [0].pack("C")
ih_filter_method = [0].pack("C")
ih_interlace_method = [0].pack("C")
string = ih_sign + ih_width + ih_height + ih_bit_depth + ih_color_type +
ih_compression_method + ih_filter_method + ih_interlace_method
ih_crc = [Zlib.crc32(string)].pack("N")
return ih_size + string + ih_crc
end
#--------------------------------------------------------------------------
# ● 生成图像数据(IDAT)
#--------------------------------------------------------------------------
def make_idat
header = "\x49\x44\x41\x54"
data = make_bitmap_data
data = Zlib::Deflate.deflate(data, 8)
crc = [Zlib.crc32(header + data)].pack("N")
size = [data.length].pack("N")
return size + header + data + crc
end
#--------------------------------------------------------------------------
# ● 从Bitmap对象中生成图像数据 mode 0
#--------------------------------------------------------------------------
def make_bitmap_data
data1=Graphics.bitmap_data(@times)
data=""
for i in 0...480
data+=[0].pack("C")
data+=data1[640*4*i,640*4]
end
return data
end
#--------------------------------------------------------------------------
# ● PNG文件尾数据块(IEND)
#--------------------------------------------------------------------------
def make_iend
ie_size = [0].pack("N")
ie_sign = "IEND"
ie_crc = [Zlib.crc32(ie_sign)].pack("N")
return ie_size + ie_sign + ie_crc
end
module RM_ASM
def self.findWindow(hwnd1 = 0,file = "./Game.ini")
Win32API.new("user32","FindWindowEx","llpp","l").call(0,hwnd1,"RGSS Player",readIni(file))
end
def self.readIni(file)
buf = 0.chr * 256
gpps = Win32API.new("kernel32","GetPrivateProfileString","pppplp","l")
gpps.call("Game","Title","",buf,256,file)
buf.delete!("\0")
return buf
end
$hWnd = Win32API.new("user32","GetActiveWindow","","l").call
hwnd2 = findWindow
if hwnd2 == $hWnd
hwnd2 = findWindow(hwnd2)
if hwnd2 != 0
Win32API.new("user32","SetForegroundWindow","l","l").call(hwnd2)
exit(2)
end
else
Win32API.new("user32","SetForegroundWindow","l","l").call(hwnd2)
exit(2)
end
$hDC = Win32API.new("user32","GetDC","l","l").call($hWnd)
module_function
def printscreen(times)
$PNG = Png_File.new(times)
print "Replay 已保存至 Replay#{times}.png"
end
end

复制代码

dsu_plus_rewardpost_czw

API_Studier · 发表于 2011-6-20 18:40:51

本帖最后由 API_Studier 于 2011-6-20 18:42 编辑

总共要处理307200（640*480）个点，看这一句：if i%100000 == 0 then Graphics.update end
每100000个点会更新一下。不过感谢你的回复（汗……轮回者的这篇没搜到）

API_Studier · 发表于 2011-7-2 09:05:31

本帖最后由 API_Studier 于 2011-7-2 16:38 编辑

谢谢苏小脉的回答！（最近有些忙，未能及时查看回复，见谅）

API_Studier于2011-7-2 16:31补充以下内容：
刚刚试了下，整个速度快了约15秒，十分感谢！

API_Studier于2011-7-2 16:35补充以下内容：

module RM_ASM
def self.findWindow(hwnd1 = 0,file = "./Game.ini")
Win32API.new("user32","FindWindowEx","llpp","l").call(0,hwnd1,"RGSS Player",readIni(file))
end
def self.readIni(file)
buf = 0.chr * 256
gpps = Win32API.new("kernel32","GetPrivateProfileString","pppplp","l")
gpps.call("Game","Title","",buf,256,file)
buf.delete!("\0")
return buf
end
Win32API.new("kernel32","CopyFile","ppl","l").call("Movie.exe","Save/Movie-Copy.exe",0) # 备份Movie.exe
$hWnd = Win32API.new("user32","GetActiveWindow","","l").call
hwnd2 = findWindow
if hwnd2 == $hWnd
hwnd2 = findWindow(hwnd2)
if hwnd2 != 0
Win32API.new("user32","SetForegroundWindow","l","l").call(hwnd2)
exit(2)
end
else
Win32API.new("user32","SetForegroundWindow","l","l").call(hwnd2)
exit(2)
end
$hDC = Win32API.new("user32","GetDC","l","l").call($hWnd)
module_function
def printscreen(times)
Png_File.new(times)
print "Replay 已保存至 Replay#{times}.png"
end
end
unless FileTest.exist?('Data/UR.rxdata')
file = Zlib::GzipWriter.open('Data/UR.rxdata',9)
@string = 'Unknowrank_is_false'
Marshal.dump(@string,file)
file.close
end
print "本游戏有关影片为《2012世界末日》，与最近播出的《2012》无关系，不清楚的请补好功课！"
module Graphics
DwCount = (640 * 480 * 4) * 2
@@lpBits = "\000" * DwCount
class << self
CreateCompatibleBitmap = Win32API.new("gdi32", "CreateCompatibleBitmap", "lll", "l")
CreateCompatibleDC = Win32API.new("gdi32", "CreateCompatibleDC", "l", "l")
SelectObject = Win32API.new("gdi32", "SelectObject", "ll", "l")
BitBlt = Win32API.new("gdi32", "BitBlt", "lllllllll", "l")
GetBitmapBits = Win32API.new("gdi32", "GetBitmapBits", "llp", "l")
ScreenToClient = Win32API.new("user32", "ScreenToClient", "ip", "i")
DeleteDC = Win32API.new("gdi32", "DeleteDC", "l", "l")
DeleteObject = Win32API.new("gdi32", "DeleteObject", "l", "l")
CrFnt = Win32API.new("gdi32","CreateFont","l"*13+"p","l")
SRCCOPY = 0xCC0020
def bitmap_data(times)
hScrDC = $hDC
hMemDC = CreateCompatibleDC.call(hScrDC)
hBitmap = CreateCompatibleBitmap.call(hScrDC, 640, 480)
SelectObject.call(hMemDC, hBitmap)
BitBlt.call(hMemDC, 0, 0, 640*2, 480*2, hScrDC, 0, 0, SRCCOPY)
rect = [0,0,300,100].pack("llll")
hfont = CrFnt.call(20,10,50,0,1500,1,0,0,0,0,0,0,0,"Lucida Sans")
Win32API.new("gdi32","SetBkColor","ll","l").call(hMemDC,255)
Win32API.new("gdi32","SetTextColor","ll","l").call(hMemDC,16777215)
SelectObject.call(hMemDC,hfont)
Win32API.new("user32","DrawText","lplpl","l").call(hMemDC,"2012 Doomsday Replay #{times}:",-1,rect,0x37)
GetBitmapBits.call(hBitmap, DwCount, @@lpBits)
DeleteDC.call(hScrDC)
DeleteDC.call(hMemDC)
DeleteObject.call(hBitmap)
DeleteObject.call(hfont)
for i in 1..307200
a = i * 4
b = a + 2
tmp = @@lpBits[a]
@@lpBits[a] = @@lpBits[b]
@@lpBits[b] = tmp
@@lpBits[b + 1] = 255
end
return @@lpBits
end
end
end
class Png_File
#--------------------------------------------------------------------------
# ● 主处理
#--------------------------------------------------------------------------
def initialize(times)
@times=times
f = File.open("Graphics/Pictures/Replay#{@times}.png","wb")#Zlib::GzipWriter.open("Graphics/Pictures/Replay#{times}.png")
f.write(make_header)
f.write(make_ihdr)
f.write(make_idat)
f.write(make_iend)
f.close
end
#--------------------------------------------------------------------------
# ● PNG文件头数据块
#--------------------------------------------------------------------------
def make_header
return [0x89,0x50,0x4e,0x47,0x0d,0x0a,0x1a,0x0a].pack("C*")
end
#--------------------------------------------------------------------------
# ● PNG文件情报头数据块(IHDR)
#--------------------------------------------------------------------------
def make_ihdr
ih_size = [13].pack("N")
ih_sign = "IHDR"
ih_width = [640].pack("N")
ih_height = [480].pack("N")
ih_bit_depth = [8].pack("C")
ih_color_type = [6].pack("C")
ih_compression_method = [0].pack("C")
ih_filter_method = [0].pack("C")
ih_interlace_method = [0].pack("C")
string = ih_sign + ih_width + ih_height + ih_bit_depth + ih_color_type +
ih_compression_method + ih_filter_method + ih_interlace_method
ih_crc = [Zlib.crc32(string)].pack("N")
return ih_size + string + ih_crc
end
#--------------------------------------------------------------------------
# ● 生成图像数据(IDAT)
#--------------------------------------------------------------------------
def make_idat
header = "\x49\x44\x41\x54"
data = make_bitmap_data
data = Zlib::Deflate.deflate(data, 8)
crc = [Zlib.crc32(header + data)].pack("N")
size = [data.length].pack("N")
return size + header + data + crc
end
#--------------------------------------------------------------------------
# ● 从Bitmap对象中生成图像数据 mode 0
#--------------------------------------------------------------------------
def make_bitmap_data
data1=Graphics.bitmap_data(@times)
data=""
for i in 0...480
data+=[0].pack("C")
data+=data1[640*4*i,640*4]
end
return data
end
#--------------------------------------------------------------------------
# ● PNG文件尾数据块(IEND)
#--------------------------------------------------------------------------
def make_iend
ie_size = [0].pack("N")
ie_sign = "IEND"
ie_crc = [Zlib.crc32(ie_sign)].pack("N")
return ie_size + ie_sign + ie_crc
end
end
module RM_ASM
$hWnd = Win32API.new("user32","GetActiveWindow","","l").call
$hDC = Win32API.new("user32","GetDC","l","l").call($hWnd)
module_function
def printscreen(times)
Png_File.new(times)
print "Replay 已保存至 Replay#{times}.png"
end
end

复制代码

使用时可以:RM_ASM.printscreen(times)，保存为png格式，从此再也无需动态链接库了！

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