X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=tabakrolletjie%2Ftransforms.py;h=50cb1d1de42287b977ba84e1d5a4b8420956b62f;hb=5cbe7a3f0a931b8feeb1e6e72b7a4f1c985a434e;hp=c5eb05f64e7d85739910eb2f89e1e4f428095070;hpb=68bffb19c42c6b325c75f11b83405701ce9ea761;p=tabakrolletjie.git

diff --git a/tabakrolletjie/transforms.py b/tabakrolletjie/transforms.py
index c5eb05f..50cb1d1 100644
--- a/tabakrolletjie/transforms.py
+++ b/tabakrolletjie/transforms.py
@@ -2,6 +2,8 @@
 
 import pygame.surface
 
+import pygame.locals as pgl
+
 
 class Transform(object):
 
@@ -49,3 +51,36 @@ class Overlay(Transform):
         over.fill(self.colour)
         surface.blit(over, (0, 0), None)
         return surface
+
+
+class Multiply(Transform):
+    """ Apply a colour by multiplying. """
+
+    ARGS = ["colour"]
+
+    def apply(self, surface):
+        mult = pygame.surface.Surface(surface.get_size())
+        mult = mult.convert_alpha()
+        mult.fill(self.colour)
+        surface.blit(mult, (0, 0), None, pgl.BLEND_RGBA_MULT)
+        return surface
+
+
+class MultiplyImage(Transform):
+    """ Apply a colour by multiplying. """
+
+    ARGS = ["image"]
+
+    def apply(self, surface):
+        surface.blit(self.image, (0, 0), None, pgl.BLEND_RGBA_MULT)
+        return surface
+
+
+class Alpha(Transform):
+    """ Make translucent. """
+
+    ARGS = ["alpha"]
+
+    def apply(self, surface):
+        surface.fill((255, 255, 255, self.alpha), None, pgl.BLEND_RGBA_MULT)
+        return surface