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Pygame Alpha Color


You can do either: s = pygame.Surface((1000,750)) # the size of your rect s.set_alpha(128) # alpha level s.fill((255,255,255)) # this fills the entire surface windowSurface.blit(s, (0,0)) # (0,0) are the top-left Linux, for example, may be able to provide a hardware surface if X4 is installed, if DGA2 is working properly, and if the moons are aligned correctly. Unlike the Surface.convert() method, the pixel format for the new image will not be exactly the same as the requested source, but it will be optimized for fast alpha blitting to An RLEACCEL Surface will be slower to modify, but quicker to blit as a source. Source

set_clip()¶ set the current clipping area of the Surface set_clip(rect) -> None set_clip(None) -> None Each Surface has an active clipping area. For this "global" alpha to be used, your source surface must not have per pixel alpha. The second method uses the SDL event queue. set_palette_at()¶ set the color for a single index in an 8bit Surface palette set_palette_at(index, RGB) -> None Set the palette value for a single entry in a Surface palette. http://gamedev.stackexchange.com/questions/47901/pygame-set-colorkey-transparency-issues

Pygame Alpha Color

This would make every pixel in the source image transparent instead of black. ‘Alpha' is different, and it comes in two flavors. ‘Image alpha' applies to the whole image, and is So if you're using this to draw overlay controls for example, you might be better off using the second alternative. Can you make your face all blue or all purple just by pressing keys ?

set_aplpha() allows you to create fading effects for game intros, in-game cinematic or game-over screens. The masks are a set of 4 integers representing which bits in a pixel will represent each color.

Some Python image packages prefer their images in bottom-to-top format (PyOpenGL for example). The lines will draw on top of the left surface, but the right surface is drawn on top of the lines. When a Surface is locked the pixel memory becomes available to access by regular software. Resize Image Pygame The lesson is: choose the system that meets your requirements.

New in pygame 1.8. Pygame Set_alpha Not Working I am doing some prototyping with Pygame on a desktop running windows and a laptop running OS X. Munchkin: Charity: Giving cards to someone who has 5 already What should I pack for an overland journey in a Bronze Age? http://stackoverflow.com/questions/328061/how-to-make-a-surface-with-a-transparent-background-in-pygame The important thing is to know how to use it.

The first is by directly checking the state of the device. Pygame Load Image Surface pixels are stored internally as a single number that has all the colors encoded into it. P, 8bit palettized Surfaces RGB, 24bit image RGBX, 32bit image with unused space RGBA, 32bit image with an alpha channel ARGB, 32bit image with alpha channel first RGBA_PREMULT, 32bit image with Many drivers are not accelerated for the types of drawing that we do, and since everything has to be blitted across the video bus (unless you can cram your source surface

  • https://github.com/horstjens/ThePythonGameBook/blob/master/pygame/004_per-pixel-alphademo.py ← previous ↑ Overview → next Comment this Page View the discussion thread. 1) that does not mean that such files always have a transparent color! 2) a duck is
  • Only 24-bit and 32-bit surfaces are supported.
  • Certain idioms are just going to be slow in python no matter what you do.
  • Usually pure software Surfaces do not require locking.
  • What does this joke between Dean Martin and Frank Sinatra mean?
  • scroll()¶ Shift the surface image in place scroll(dx=0, dy=0) -> None Move the image by dx pixels right and dy pixels down.
  • The new Surface will inherit the palette, color key, and alpha settings from its parent.
  • You may need to read a pixel from the converted image which you know to be the transparent colour, and then set that as the colour key.

Pygame Set_alpha Not Working

Know how import works - try writing a program that is spread across several source files. view publisher site get_at()¶ get the color value at a single pixel get_at((x, y)) -> Color Return a copy of the RGBA Color value at the given pixel. Pygame Alpha Color The two events, MOUSEBUTTONDOWN and MOUSEBUTTONUP, will still be sitting in the event queue, however, waiting to be retrieved and processed. Pygame Sprite Transparency So that's not the solution either.

If the pixel position is outside the area of the Surface an IndexError exception will be raised. He is also the author of Twitch, an entirely average pygame arcade game. Blit the OPAQUE BACKGROUND onto this temporary image. It's best to stick with good old reliable SWSURFACE until you're sure you know what you're doing. Pygame Color Key Not Working

If using RGBA, the Alpha (A part of RGBA) is ignored unless the surface uses per pixel alpha (Surface has the SRCALPHA flag). Does this series involving sine converge or diverge? The long answer is to scroll in steps of several pixels at a time; don't try to make scrolling perfectly smooth. All examples demonstrate how to work with transparency and pygame surfaces. 004_colorkey.py is simple to understand.

What happens is that if the surface you are blitting (the source) has alpha pixels values for the pixels itself (i.e. 32 bit depth), a "global alpha" value,as set by the Pygame Display more hot questions question feed lang-py about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Not the answer you're looking for?

If the Surface has had None set for the clipping area, the Surface will return a rectangle with the full area of the Surface.

State-checking (system 1) gives you precision - you know exactly when a given input was made - if mouse.get_pressed([0]) is 1, that means that the left mouse button is down right The optional flags argument can be set to pygame.RLEACCEL to provide better performance on non accelerated displays. Many pygame functions take rects as arguments, and they also take ‘rectstyles', a sequence that has the same values as a rect. Pygame Rect See the pygame.image.frombuffer() method for a potentially faster way to transfer images into Pygame.

See the Surface object documentation for more information about colors and pixel formats. The state system has one great weakness, however. This verison works with python3.x only. not a white box around it).

Most other platforms can't. This function will temporarily lock and unlock the Surface as needed. Is total distance walked specific to a single Pokémon, or to a species of Pokémon? Press the keys to see what happens.

DOUBLEBUF; well, that sounds fast, I guess I want that too!. Notice the transparent background ente.jpg pygame/data a picture of a duck2) If you see no colourful source code below, click on “reload” on your browser. If the pixel position is outside the area of the Surface an IndexError exception will be raised. Subsurfaces will also have a larger pitch than their real width.

This works both for images without transparency such as .jpg images but also for images with in-build transparency such as .gif or .png images. You can only have one of these - that's an SDL limitation, not a pygame one. Blit the per-pixel transparency image onto the temporary image. It works pretty reliably under Windows, so if you're not interested in cross-platform performance, it may provide you with a substantial speed increase.

This method implicitly locks the Surface. pygame.Surface.get_buffer — acquires a buffer object for the pixels of the Surface. It's tempting to write something like the following: Check to see if the rects are in collision. The surface will only be unlocked after the final lock is released.

This represents a smaller portion of the source Surface to draw. For example, consider the question of how to organize your graphics files. C Macro - how to get an integer value into a string literal Why didn't "spiel" get an "sh"? "Storytelling" in the introduction: Math papers Brainfuck Interpreter written in x86 Assembly Don't worry too much about the explanation; just note that convert() is necessary if you want to get any kind of speed out of your blits.

To elaborate on how I'm struggling with this, the blurb below is a slightly modified hunk of code from this SO answer, but if you run it, you'll see that "image"