+++ /dev/null
-#Copyright 2006 DR0ID <dr0id@bluewin.ch> http://mypage.bluewin.ch/DR0ID
-#
-#
-#
-"""
-Allow to draw some gradients relatively easy.
-"""
-
-__author__ = "$Author: DR0ID $"
-__version__= "$Revision: 109 $"
-__date__ = "$Date: 2007-08-09 20:33:32 +0200 (Do, 09 Aug 2007) $"
-
-import pygame
-import math
-
-BLEND_MODES_AVAILABLE = False
-vernum = pygame.vernum
-if vernum[0]>=1 and vernum[1]>=8:
- BLEND_MODES_AVAILABLE = True
-
-
-class ColorInterpolator(object):
- '''
- ColorInterpolator(distance, color1, color2, rfunc, gfunc, bfunc, afunc)
-
- interpolates a color over the distance using different functions for r,g,b,a
- separately (a= alpha).
- '''
- def __init__(self, distance, color1, color2, rfunc, gfunc, bfunc, afunc):
- object.__init__(self)
-
- self.rInterpolator = FunctionInterpolator(color1[0], color2[0], distance, rfunc)
- self.gInterpolator = FunctionInterpolator(color1[1], color2[1], distance, gfunc)
- self.bInterpolator = FunctionInterpolator(color1[2], color2[2], distance, bfunc)
- if len(color1)==4 and len(color2)==4:
- self.aInterpolator = FunctionInterpolator(color1[3], color2[3], distance, afunc)
- else:
- self.aInterpolator = FunctionInterpolator(255, 255, distance, afunc)
-
- def eval(self, x):
- '''
- eval(x) -> color
-
- returns the color at the position 0<=x<=d (actually not bound to this interval).
- '''
-## print "colorInterp x", x, self.rInterpolator.eval(x), self.gInterpolator.eval(x), self.bInterpolator.eval(x)
- return [self.rInterpolator.eval(x),
- self.gInterpolator.eval(x),
- self.bInterpolator.eval(x),
- self.aInterpolator.eval(x)]
-
-
-
-class FunctionInterpolator(object):
- '''
- FunctionINterpolator(startvalue, endvalue, trange, func)
-
- interpolates a function y=f(x) in the range trange with
- startvalue = f(0)
- endvalue = f(trange)
- using the function func
- '''
- def __init__(self, startvalue, endvalue, trange, func):
- object.__init__(self)
- # function
- self.func = func
- # y-scaling
- self.a = endvalue-startvalue
- if self.a == 0:
- self.a = 1.
- # x-scaling
- if trange!=0:
- self.b = 1./abs(trange)
- else:
- self.b = 1.
- # x-displacement
- self.c = 0
- # y-displacement
- self.d = min(max(startvalue,0),255)
-
- def eval(self, x):
- '''
- eval(x)->float
-
- return value at position x
- '''
- # make sure that the returned value is in [0,255]
-## return int(round(min(max(self.a*self.func(self.b*(x+self.c))+self.d, 0), 255)))
- return int(min(max(self.a*self.func(self.b*(x+self.c))+self.d, 0), 255))
-
-
-
-##def gradient(surface,
-## startpoint,
-## endpoint,
-## startcolor,
-## endcolor,
-## Rfunc = (lambda x:x),
-## Gfunc = (lambda x:x),
-## Bfunc = (lambda x:x),
-## Afunc = (lambda x:1),
-## type = "line",
-## mode = None ):
-## '''
-## surface : surface to draw on
-## startpoint: (x,y) point on surface
-## endpoint : (x,y) point on surface
-## startcolor: (r,g,b,a) color at startpoint
-## endcolor : (r,g,b,a) color at endpoint
-## Rfunc : function y = f(x) with startcolor =f(0) and endcolor = f(1) where 0 is at startpoint and 1 at endpoint
-## Gfunc : --- " ---
-## Bfunc : --- " ---
-## Afunc : --- " ---
-## these functions are evaluated in the range 0 <= x <= 1 and 0<= y=f(x) <= 1
-## type : "line", "circle" or "rect"
-## mode : "+", "-", "*", None (how the pixels are drawen)
-##
-## returns : surface with the color characteristics w,h = (d, 256) and d = length of endpoint-startpoint
-##
-## '''
-## dx = endpoint[0]-startpoint[0]
-## dy = endpoint[1]-startpoint[1]
-## d = int(round(math.hypot(dx, dy)))
-## angle = math.degrees( math.atan2(dy, dx) )
-##
-## color = ColorInterpolator(d, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
-##
-## if type=="line":
-## h = int(2.*math.hypot(*surface.get_size()))
-### bigSurf = pygame.Surface((d, h)).convert_alpha()
-## bigSurf = pygame.Surface((d, h), pygame.SRCALPHA)#.convert_alpha()
-### bigSurf = pygame.Surface((d, 1), pygame.SRCALPHA)#.convert_alpha()
-## bigSurf.lock()
-## bigSurf.fill((0,0,0,0))
-## bigSurf.set_colorkey((0,0,0,0))
-## for x in range(d):
-## pygame.draw.line(bigSurf, color.eval(x), (x,0), (x,h), 1)
-### for x in range(d):
-### bigSurf.set_at((x, 0), color.eval(x))
-### bigSurf = pygame.transform.scale(bigSurf, (d, h))
-##
-## bigSurf = pygame.transform.rotate(bigSurf, -angle) #rotozoom(bigSurf, -angle, 1)
-## bigSurf.set_colorkey((0,0,0, 0))
-## rect = bigSurf.get_rect()
-## srect = pygame.Rect(rect)
-## dx = d/2. * math.cos(math.radians(angle))
-## dy = d/2. * math.sin(math.radians(angle))
-## rect.center = startpoint
-## rect.move_ip(dx, dy)
-## bigSurf.unlock()
-##
-## elif type=="circle":
-## bigSurf = pygame.Surface((2*d, 2*d)).convert_alpha()
-## bigSurf.fill((0,0,0,0))
-## bigSurf.lock()
-## for x in range(d, 0, -1):
-## pygame.draw.circle(bigSurf, color.eval(x), (d,d), x)
-## bigSurf.unlock()
-## rect = bigSurf.get_rect()
-## srect = pygame.Rect(rect)
-## rect.center = (startpoint[0], startpoint[1])
-##
-## elif type=="rect":
-## bigSurf = pygame.Surface((2*d, 2*d)).convert_alpha()
-## bigSurf.fill((0,0,0,0))
-## c = bigSurf.get_rect().center
-## bigSurf.lock()
-## for x in range(d,-1,-1):
-## r = pygame.Rect(0,0,2*x,2*x)
-## r.center = c
-## pygame.draw.rect(bigSurf, color.eval(x), r)
-## bigSurf.unlock()
-## bigSurf = pygame.transform.rotozoom(bigSurf, -angle, 1)
-## bigSurf.set_colorkey((0,0,0, 0))
-##
-## rect = bigSurf.get_rect()
-## srect = pygame.Rect(rect)
-## rect.center = startpoint
-## else:
-## raise NameError("type must be one of \"line\",\"circle\" or \"rect\"")
-##
-## if mode is None:
-## surface.blit(bigSurf, rect, srect)
-## else:
-## if mode=="+":
-## cf = pygame.color.add
-## elif mode=="*":
-## cf = pygame.color.multiply
-## elif mode=="-":
-## cf = pygame.color.subtract
-## else:
-## raise NameError("type must be one of \"+\", \"*\", \"-\" or None")
-## irect = surface.get_clip().clip(rect)
-## surface.lock()
-## for x in range(irect.left, irect.left+irect.width):
-## for y in range(irect.top, irect.top+irect.height):
-## surface.set_at((x,y), cf(surface.get_at((x,y)), bigSurf.get_at((x-rect.left, y-rect.top)) ) )
-## surface.unlock()
-##
-## del bigSurf
-## char = pygame.Surface((d+1, 257))
-### char.fill((0,0,0))
-### ox = 0
-### oldcol = color.eval(0)
-### for x in range(d):
-### col = color.eval(x)
-### pygame.draw.line(char, (255,0,0), (x, 256-col[0]), (ox, 256-oldcol[0]))
-### pygame.draw.line(char, (0,255,0), (x, 256-col[1]), (ox, 256-oldcol[1]))
-### pygame.draw.line(char, (0,0,255), (x, 256-col[2]), (ox, 256-oldcol[2]))
-### pygame.draw.line(char, (255,255,255), (x, 256-col[3]), (ox, 256-oldcol[3]))
-### ox = x
-### oldcol = col
-###
-## return char
-
-
-
-
-def vertical(size, startcolor, endcolor):
- """
- Draws a vertical linear gradient filling the entire surface. Returns a
- surface filled with the gradient (numeric is only 2-3 times faster).
- """
- height = size[1]
- bigSurf = pygame.Surface((1,height)).convert_alpha()
- dd = 1.0/height
- sr, sg, sb, sa = startcolor
- er, eg, eb, ea = endcolor
- rm = (er-sr)*dd
- gm = (eg-sg)*dd
- bm = (eb-sb)*dd
- am = (ea-sa)*dd
- for y in range(height):
- bigSurf.set_at((0,y),
- (int(sr + rm*y),
- int(sg + gm*y),
- int(sb + bm*y),
- int(sa + am*y))
- )
- return pygame.transform.scale(bigSurf, size)
-
-
-def horizontal(size, startcolor, endcolor):
- """
- Draws a horizontal linear gradient filling the entire surface. Returns a
- surface filled with the gradient (numeric is only 2-3 times faster).
- """
- width = size[0]
- bigSurf = pygame.Surface((width, 1)).convert_alpha()
- dd = 1.0/width
- sr, sg, sb, sa = startcolor
- er, eg, eb, ea = endcolor
- rm = (er-sr)*dd
- gm = (eg-sg)*dd
- bm = (eb-sb)*dd
- am = (ea-sa)*dd
- for y in range(width):
- bigSurf.set_at((y,0),
- (int(sr + rm*y),
- int(sg + gm*y),
- int(sb + bm*y),
- int(sa + am*y))
- )
- return pygame.transform.scale(bigSurf, size)
-
-
-def radial(radius, startcolor, endcolor):
- """
- Draws a linear raidal gradient on a square sized surface and returns
- that surface.
- """
- bigSurf = pygame.Surface((2*radius, 2*radius)).convert_alpha()
- bigSurf.fill((0,0,0,0))
- dd = -1.0/radius
- sr, sg, sb, sa = endcolor
- er, eg, eb, ea = startcolor
- rm = (er-sr)*dd
- gm = (eg-sg)*dd
- bm = (eb-sb)*dd
- am = (ea-sa)*dd
-
- draw_circle = pygame.draw.circle
- for rad in range(radius, 0, -1):
- draw_circle(bigSurf, (er + int(rm*rad),
- eg + int(gm*rad),
- eb + int(bm*rad),
- ea + int(am*rad)), (radius, radius), rad)
- return bigSurf
-
-def squared(width, startcolor, endcolor):
- """
- Draws a linear sqared gradient on a square sized surface and returns
- that surface.
- """
- bigSurf = pygame.Surface((width, width)).convert_alpha()
- bigSurf.fill((0,0,0,0))
- dd = -1.0/(width/2)
- sr, sg, sb, sa = endcolor
- er, eg, eb, ea = startcolor
- rm = (er-sr)*dd
- gm = (eg-sg)*dd
- bm = (eb-sb)*dd
- am = (ea-sa)*dd
-
- draw_rect = pygame.draw.rect
- for currentw in range((width/2), 0, -1):
- pos = (width/2)-currentw
- draw_rect(bigSurf, (er + int(rm*currentw),
- eg + int(gm*currentw),
- eb + int(bm*currentw),
- ea + int(am*currentw)), pygame.Rect(pos, pos, 2*currentw, 2*currentw ))
- return bigSurf
-
-
-def vertical_func(size, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1)):
- """
- Draws a vertical linear gradient filling the entire surface. Returns a
- surface filled with the gradient (numeric is only 2x faster).
- Rfunc, Gfunc, Bfunc and Afunc are function like y = f(x). They define
- how the color changes.
- """
- height = size[1]
- bigSurf = pygame.Surface((1,height)).convert_alpha()
- color = ColorInterpolator(height, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- for y in range(0, height):
- bigSurf.set_at((0,y), color.eval(y+0.1))
- return pygame.transform.scale(bigSurf, size)
-
-
-def horizontal_func(size, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1)):
- """
- Draws a horizontal linear gradient filling the entire surface. Returns a
- surface filled with the gradient (numeric is only 2x faster).
- Rfunc, Gfunc, Bfunc and Afunc are function like y = f(x). They define
- how the color changes.
- """
- width = size[0]
- bigSurf = pygame.Surface((width, 1)).convert_alpha()
- color = ColorInterpolator(width, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- for y in range(0, width):
- bigSurf.set_at((y, 0), color.eval(y+0.1))
- return pygame.transform.scale(bigSurf, size)
-
-def radial_func(radius, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), colorkey=(0,0,0,0)):
- """
- Draws a linear raidal gradient on a square sized surface and returns
- that surface.
- """
- bigSurf = pygame.Surface((2*radius, 2*radius)).convert_alpha()
- if len(colorkey)==3:
- colorkey += (0,)
- bigSurf.fill(colorkey)
- color = ColorInterpolator(radius, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- draw_circle = pygame.draw.circle
- for rad in range(radius, 0, -1):
- draw_circle(bigSurf, color.eval(rad), (radius, radius), rad)
- return bigSurf
-
-def radial_func_offset(radius, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), colorkey=(0,0,0,0), offset=(0,0)):
- """
- Draws a linear raidal gradient on a square sized surface and returns
- that surface.
- offset is the amount the center of the gradient is displaced of the center of the image.
- Unfotunately this function ignores alpha.
- """
- bigSurf = pygame.Surface((2*radius, 2*radius))#.convert_alpha()
-
- mask = pygame.Surface((2*radius, 2*radius), pygame.SRCALPHA)#.convert_alpha()
- mask.fill(colorkey)
- mask.set_colorkey((255,0,255))
- pygame.draw.circle(mask, (255,0,255), (radius, radius), radius)
-
- if len(colorkey)==3:
- colorkey += (0,)
- bigSurf.fill(colorkey)
-
- color = ColorInterpolator(radius, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- draw_circle = pygame.draw.circle
- radi = radius + int(math.hypot(offset[0], offset[1])+1)
- for rad in range(radi, 0, -1):
- draw_circle(bigSurf, color.eval(rad), (radius+offset[0], radius+offset[1]), rad)
-
- bigSurf.blit(mask, (0,0))
- bigSurf.set_colorkey(colorkey)
- return bigSurf
-
-
-def squared_func(width, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), offset=(0,0)):
- """
- Draws a linear sqared gradient on a square sized surface and returns
- that surface.
- """
- bigSurf = pygame.Surface((width, width)).convert_alpha()
- bigSurf.fill((0,0,0,0))
- color = ColorInterpolator(width/2, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- draw_rect = pygame.draw.rect
- widthh = width+2*int(max(abs(offset[0]),abs(offset[1])))
- for currentw in range((widthh/2), 0, -1):
-## pos = (width/2)-currentw
- rect = pygame.Rect(0, 0, 2*currentw, 2*currentw )
- rect.center = (width/2+offset[0], width/2+offset[1])
- draw_rect(bigSurf, color.eval(currentw), rect)
- return bigSurf
-
-def draw_gradient(surface, startpoint, endpoint, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), mode=0):
- """
- Instead of returning an Surface, this function draw it directy onto the
- given Surface and returns the rect.
- """
- dx = endpoint[0]-startpoint[0]
- dy = endpoint[1]-startpoint[1]
- d = int(round(math.hypot(dx, dy)))
- angle = math.degrees( math.atan2(dy, dx) )
-
- h = int(2.*math.hypot(*surface.get_size()))
-
- bigSurf = horizontal_func((d,h), startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
-
-## bigSurf = pygame.transform.rotate(bigSurf, -angle) #rotozoom(bigSurf, -angle, 1)
- bigSurf = pygame.transform.rotozoom(bigSurf, -angle, 1)
-## bigSurf.set_colorkey((0,0,0, 0))
- rect = bigSurf.get_rect()
- srect = pygame.Rect(rect)
- dx = d/2. * math.cos(math.radians(angle))
- dy = d/2. * math.sin(math.radians(angle))
- rect.center = startpoint
- rect.move_ip(dx, dy)
- if BLEND_MODES_AVAILABLE:
- return surface.blit(bigSurf, rect, None, mode)
- else:
- return surface.blit(bigSurf, rect)
-
-
-def draw_circle(surface, startpoint, endpoint, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), mode=0):
- """
- Instead of returning an Surface, this function draw it directy onto the
- given Surface and returns the rect.
- """
- dx = endpoint[0]-startpoint[0]
- dy = endpoint[1]-startpoint[1]
- radius = int(round(math.hypot(dx, dy)))
- pos = (startpoint[0]-radius, startpoint[1]-radius)
- if BLEND_MODES_AVAILABLE:
- return surface.blit(radial_func(radius, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc), pos, None, mode)
- else:
- return surface.blit(radial_func(radius, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc), pos)
-
-def draw_squared(surface, startpoint, endpoint, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), mode=0):
- """
- Instead of returning an Surface, this function draw it directy onto the
- given Surface and returns the rect.
- """
- dx = endpoint[0]-startpoint[0]
- dy = endpoint[1]-startpoint[1]
- angle = math.degrees( math.atan2(dy, dx) )
- width = 2*int(round(math.hypot(dx, dy)))
-
- bigSurf = squared_func(width, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
-
- bigSurf = pygame.transform.rotozoom(bigSurf, -angle, 1)
-## bigSurf.set_colorkey((0,0,0, 0))
- rect = bigSurf.get_rect()
- rect.center = startpoint
- if BLEND_MODES_AVAILABLE:
- return surface.blit(bigSurf, rect, None, mode)
- else:
- return surface.blit(bigSurf, rect)
-
-
-def chart(startpoint, endpoint, startcolor, endcolor, Rfunc = (lambda x:x), Gfunc = (lambda x:x), Bfunc = (lambda x:x), Afunc = (lambda x:1), scale=None):
- """
- This returns a Surface where the change of the colors over the distance
- (the width of the image) is showen as a line.
- scale: a float, 1 is not scaling
- """
- dx = endpoint[0]-startpoint[0]
- dy = endpoint[1]-startpoint[1]
- distance = int(round(math.hypot(dx, dy)))
- color = ColorInterpolator(distance, startcolor, endcolor, Rfunc, Gfunc, Bfunc, Afunc)
- bigSurf = pygame.Surface((distance, 256))
- bigSurf.fill((0,)*3)
- oldcol = color.eval(0)
- for x in range(distance):
- r, g, b, a = color.eval(x)
- pygame.draw.line(bigSurf, (255, 0, 0, 128), (x-1, oldcol[0]), (x, r))
- pygame.draw.line(bigSurf, (0, 255, 0, 128), (x-1, oldcol[1]), (x, g))
- pygame.draw.line(bigSurf, (0, 0, 255, 128), (x-1, oldcol[2]), (x, b))
- pygame.draw.line(bigSurf, (255, 255, 255, 128), (x-1, oldcol[3]), (x, a))
- oldcol = (r,g,b,a)
- if scale:
-## return pygame.transform.scale(bigSurf, size)
- return pygame.transform.rotozoom(bigSurf, 0, scale)
- return pygame.transform.flip(bigSurf, 0, 1)
-#------------------------------------------------------------------------------
-
-
-
-
-def genericFxyGradient(surf, clip, color1, color2, func, intx, yint, zint=None):
- """
- genericFxyGradient(size, color1, color2,func, intx, yint, zint=None)
-
- some sort of highfield drawer :-)
-
- surf : surface to draw
- clip : rect on surf to draw in
- color1 : start color
- color2 : end color
- func : function z = func(x,y)
- xint : interval in x direction where the function is evaluated
- yint : interval in y direction where the function is evaluated
- zint : if not none same as yint or xint, if None then the max and min value
- of func is taken as z-interval
-
- color = a*func(b*(x+c), d*(y+e))+f
- """
- # make shure that x1<x2 and y1<y2 and z1<z2
- w,h = clip.size
- x1 = min(intx)
- x2 = max(intx)
- y1 = min(yint)
- y2 = max(yint)
- if zint: # if user give us z intervall, then use it
- z1 = min(zint)
- z2 = max(zint)
- else: # look for extrema of function (not best algorithme)
- z1 = func(x1,y1)
- z2 = z1
- for i in range(w):
- for j in range(h):
- r = func(i,j)
- z1 = min(z1, r)
- z2 = max(z2, r)
-
- x1 = float(x1)
- x2 = float(x2)
- y1 = float(y1)
- y2 = float(y2)
- z1 = float(z1)
- z2 = float(z2)
- if len(color1)==3:
- color1 = list(color1)
- color1.append(255)
- if len(color2)==3:
- color2 = list(color2)
- color2.append(255)
-
- # calculate streching and displacement variables
- a = ((color2[0]-color1[0])/(z2-z1), \
- (color2[1]-color1[1])/(z2-z1), \
- (color2[2]-color1[2])/(z2-z1), \
- (color2[3]-color1[3])/(z2-z1) ) # streching in z direction
- b = (x2-x1)/float(w) # streching in x direction
- d = (y2-y1)/float(h) # streching in y direction
- f = ( color1[0]-a[0]*z1, \
- color1[1]-a[1]*z1, \
- color1[2]-a[2]*z1, \
- color1[3]-a[3]*z1 )# z displacement
- c = x1/b
- e = y1/d
-
- surff = pygame.surface.Surface((w,h)).convert_alpha()
- # generate values
- for i in range(h):
- for j in range(w):
- val = func(b*(j+c), d*(i+e))
- #clip color
- color = ( max(min(a[0]*val+f[0],255),0), \
- max(min(a[1]*val+f[1],255),0), \
- max(min(a[2]*val+f[2],255),0), \
- max(min(a[3]*val+f[3],255),0) )
- surff.set_at( (j,i), color )
- surf.blit(surff, clip)
-
-
-
projects / minwii.git / blobdiff