之前使用过c、java、go语言实现过生成纯色BMP图片的功能。
现在由python语言完成该功能。
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from array import arrayclass bmp: """ bmp data structure """ def __init__(self, w=1080, h=1920, color = 0xffffff): self.w = w self.h = h self.gen_bmp_header() self.paint_bgcolor(color) def calc_data_size (self): if((self.w*3)%4 == 0): self.dataSize = self.w * 3 * self.h else: self.dataSize = (((self.w * 3) // 4 + 1) * 4) * self.h self.fileSize = self.dataSize + 54 def conv2byte(self, l, num, len): tmp = num for i in range(len): l.append(tmp & 0x000000ff) tmp >>= 8 def gen_bmp_header (self): self.calc_data_size(); self.bmp_header = [0x42, 0x4d] self.conv2byte(self.bmp_header, self.fileSize, 4) #file size self.conv2byte(self.bmp_header, 0, 2) self.conv2byte(self.bmp_header, 0, 2) self.conv2byte(self.bmp_header, 54, 4) #rgb data offset self.conv2byte(self.bmp_header, 40, 4) #info block size self.conv2byte(self.bmp_header, self.w, 4) self.conv2byte(self.bmp_header, self.h, 4) self.conv2byte(self.bmp_header, 1, 2) self.conv2byte(self.bmp_header, 24, 2) #888 self.conv2byte(self.bmp_header, 0, 4) #no compression self.conv2byte(self.bmp_header, self.dataSize, 4) #rgb data size self.conv2byte(self.bmp_header, 0, 4) self.conv2byte(self.bmp_header, 0, 4) self.conv2byte(self.bmp_header, 0, 4) self.conv2byte(self.bmp_header, 0, 4) def print_bmp_header (self): length = len(self.bmp_header) for i in range(length): print("{:0>2x}".format(self.bmp_header[i]), end=' ') if i%16 == 15: print('') print('') def paint_bgcolor(self, color=0xffffff): self.rgbData = [] for r in range(self.h): self.rgbDataRow = [] for c in range(self.w): self.rgbDataRow.append(color) self.rgbData.append(self.rgbDataRow) def paint_line(self, x1, y1, x2, y2, color): k = (y2 - y1) / (x2 - x1) for x in range(x1, x2+1): y = int(k * (x - x1) + y1) self.rgbData[y][x] = color def paint_rect(self, x1, y1, w, h, color): for x in range(x1, x1+w): for y in range(y1, y1+h): self.rgbData[y][x] = color def paint_point(self, x, y, color=0x000000): self.rgbData[y][x] = color def save_image(self, name="save.bmp"): f = open(name, 'wb') #write bmp header f.write(array('B', self.bmp_header).tobytes()) #write rgb data zeroBytes = self.dataSize // self.h - self.w * 3 for r in range(self.h): l = [] for i in range(len(self.rgbData[r])): p = self.rgbData[r][i] l.append(p & 0x0000ff) p >>= 8 l.append(p & 0x0000ff) p >>= 8 l.append(p & 0x0000ff) f.write(array('B', l).tobytes()) for i in range(zeroBytes): f.write(bytes([0x00])) #close file f.close()if __name__ == '__main__': image = bmp(35, 35) for i in range(35): image.paint_point(i, i, 0xff0000) image.save_image("save1.bmp") import os os.system("save1.bmp") |
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原文链接：https://blog.csdn.net/qq_44103902/article/details/113667608
