pygame.display
这个模块提供了对pygame display的控制。Pygame有唯一一个以窗口或者全屏幕显示的display Surface。你一旦创建这个display，你可以把它作为普通的Surface一样使用。改变不会马上在屏幕上显示出来，你必须使用两个翻转(flipping)函数之一来更新实际显示出来的东西。
display的起始位置（即x=0和y=0）在屏幕的左上角。两个坐标轴分别往右和往下增加。
pygame的display可以被初始化成多种模式之一。默认情况下，它被初始化成一个软件驱动的帧缓冲。你可以请求硬件加速和OpenGL的支持。这由传给pygame.display.set_mode的参数来控制。
任何时刻pygame都只能有一个活动的display。使用pygame.display.set_mod创建一个新的display会把老的display关闭。如果需要精确控制像素格式和显示的分辨率，使用pygame.display.mode_ok函数来设置显示模式，pygame.display.list_modes来列出所有可用的模式，pygame.display.Info来创建一个显示信息对象来查询display的相关信息。
一旦display Surface创建了以后，这个模块的函数会对这个唯一的display起作用。如果这个模块uninitialized后，这个Surface就不能再使用。如果设置了一个新的显示模式，现有的Surface会自动转到新的display上操作。
如果设置了显示模式，一些事件会放在事件队列当中。在程序退出的时候，pygame.QUIT事件会发生。当窗口获取或者失去输入焦点的时候，pygame.ACTIVEEVENT事件会发生。如果display设置了pygame.RESIZEABLE标记，当用户改变窗口的大小时，pygame.VIDEORESIZE事件会发生。如果使用硬件display图形是直接画在屏幕上的，当窗口的一部分必须重画时，pygame.VIDEOEXPOSE事件会发生。
1. pygame.display.init
初始化display模块。
pygame.display.init(): return None
初始化pygame的display模块。display模块在初始化之前不能做任何事情。当你调用高层的pygame.init的时候，这个模块也被自动初始化了。
pygame会从一组内部显示后台中选择一个进行初始化。显示模式的选择依赖于平台和用户的权限。在显示模式被初始化之前，可以设置环境变量SDL_VIDEODRIVER来控制使用哪个后台。系统的选择列在这里：
- Windows : windib, directx
- Unix : x11, dga, fbcon, directfb, ggi, vgl, svgalib, aalib
在某些系统上可以把pygame的display嵌入已经存在的窗口中。如果要这样做，必须设置环境变量SDL_WINDOWID来指定窗口的id或者句柄。当pygame的display被初始化的时候会检查这个变量。要注意的是嵌入的display可能会有很多古怪的副作用。
这个函数多次调用不会有什么坏处，实际上多次调用不会起任何作用。
2. pygame.display.quit
uninitialize这个display模块。
pygame.display.quit(): return None
这个函数关闭整个display模块。这意味着任何活动的display会被关闭。这个函数在程序退出的时候会被自动调用。
这个函数多次调用不会有什么坏处，实际上多次调用不会起任何作用。
3. pygame.display.get_init
如果display模块已经初始化，它返回True
pygame.display.get_init(): return bool
如果pygame.display函数当前已经初始化，返回True
4. pygame.display.set_mode
初始化display的窗口或者屏幕
pygame.display.set_mode(resolution, flags=0, depth=0): return Surface
这个函数会创建一个display Surface。参数用来指定请求display的类型。实际创建的display会是系统支持的类型中与请求的尽可能一致的类型。
resolution（分辨率）参数是一对数表示宽度和高度。flags参数是一组选项的集合。depth参数表示颜色的位数。
返回的Surface和普通的Surface一样使用，但是这个Surface上的东西会最终在显示器上看到。
最好不用使用depth参数，默认情况下会自动选择当前系统最好和最快的颜色深度。如果你的游戏需要特定的颜色格式，你可以使用这个参数来控制颜色深度。pygame会模拟系统不能实现的颜色深度，但这样会很慢。
当请求全屏显示模式时，请求的分辨率有时不能够被精确匹配。在这种情况下，pygame会选择最接近的兼容模式设置显示分辨率。而返回的Surface仍然匹配请求的分辨率。
flags参数可以包含你需要的display的类型。有多种选项可以选择，你可以使用位或运算（"|"）来组合它们。如果传入0或者不指定flags参数，会自动使用默认值。这里是选项的列表：
- pygame.FULLSCREEN 创建全屏的display
- pygame.DOUBLEBUF 使用HWSURFACE或OPENGL时建议加上这个标志
- pygame.HWSURFACE 使用硬件加速，只在FULLSCREEN时有效
- pygame.OPENGL 创建一个可以使用opengl的display
- pygame.RESIZABLE display的窗口可变大小
- pygame.NOFRAME display的窗口没有边框和控制条
5. pygame.display.get_surface
返回指向当前display Surface的引用
pygame.display.get_surface(): return Surface
返回指向当前display Surface的引用。如果当前的显示模式还没有设置，那么返回None
6. pygame.display.flip
把整个display Surface上的东西更新到屏幕上
pygame.display.flip(): return None
这个函数会更新整个display的内容。如果显示模式设置成pygame.HWSURFACE和pygame.DOUBLEBUF，这个操作会等待垂直同步并交换surfaces。如果使用其它的显示模式，这个操作只是简单的更新整个Surface的内容。
当使用pygame.OPENGL显示模式时，这个操作会进行一个gl缓冲交换操作。
7. pygame.display.update
更新软件display的部分内容
pygame.display.update(rectangle=None): return None
pygame.display.update(rectangle_list): return None
这个函数好像是为软件display优化的pygame.display.flip。它允许只有屏幕的一部分被更新而不是整个。如果没有指定参数，它和pygame.display.flip一样更新整个窗口。
你可以传给这个函数一个矩形或者一组矩形作为参数。一次传送多个矩形，比多次调用每次一个（或者一部分）矩形更有效率。如果传送一个矩形的列表，则列表中可以含有None，它会被自动跳过。
这个函数不能用在pygame.OPENGL模式上，如果使用会导致一个异常。
8. pygame.display.get_driver
获得pygame显示后台的名字
pygame.display.get_driver(): return name
pygame在初始化时从多个可以选择的显示后台中选择一个。这个函数返回选择的显示后台的名字。这为 display的加速能力提供了一些有限的信息。
9. pygame.display.Info
创建一个视频显示信息对象
pygame.display.Info(): return VideoInfo
创建一个简单的对象，包含图形环境的一些信息。如果在pygame.display.set_mode之前被调用，有些平台上会提供默认的显示模式的信息。在设置了显示模式后调用这个函数，可以验证特定的显示选项是否满足。VideoInfo包含下列对象：
- hw: True if the display is hardware accelerated
- wm: True if windowed display modes can be used
- video_mem: The megabytes of video memory on the display. This is 0 if unknown
- bitsize: Number of bits used to store each pixel
- bytesize: Number of bytes used to store each pixel
- masks: Four values used to pack RGBA values into pixels
- shifts: Four values used to pack RGBA values into pixels
- losses: Four values used to pack RGBA values into pixels
- blit_hw: True if hardware Surface blitting is accelerated
- blit_hw_CC: True if hardware Surface colorkey blitting is accelerated
- blit_hw_A: True if hardware Surface pixel alpha blitting is accelerated
- blit_sw: True if software Surface blitting is accelerated
- blit_sw_CC: True if software Surface colorkey blitting is accelerated
- blit_sw_A: True if software Surface pixel alpha blitting is acclerated
10. pygame.display.get_wm_info
获得当前窗口系统的信息
pygame.display.get_wm_info(): return dict
创建一个字典，关键字为字符串类型。关键字和值是由系统任意创建的。某些系统上可能没有任何信息，会返回一个空的字典。大部分系统上都有一个"window"关键字，它的值是当前display的系统id。
11. pygame.display.list_modes
获得一个可用的全屏模式列表
pygame.display.list_modes(depth=0, flags=pygame.FULLSCREEN): return list
这个函数返回一个指定颜色深度的所有可用的分辨率的列表。如果给定的参数没有显示模式可用，那么会返回一个空的列表。返回-1表示任何分辨率都可以用（这可能是因为指定的是窗口模式）。列表中的模式按照分辨率从大到小排列。
如果depth是0，SDL会自动选择当前或最好的颜色深度。flags参数默认是pygame.FULLSCREEN，你可以添加额外的选项。
12. pygame.display.mode_ok
选择一个最好的颜色深度
pygame.display.mode_ok(size, flags=0, depth=0): return depth
这个函数使用和pygame.display.set_mode相同的参数。它用来确定请求的模式是否可用。指定的模式不能使用它会返回0，否则它会返回一个最佳的颜色深度。
通常depth参数不会被使用。然而某些平台上支持多种颜色深度都同样好，传递这个参数用来指定哪个是更好的。
最有用的flags是pygame.HWSURFACE、pygame.DOUBLEBUF和pygame.FULLSCREEN。如果被请求的flags不能够设置，函数会返回0。
13. pygame.display.gl_get_attribute
获得当前display的opengl标志
pygame.display.gl_get_attribute(flag): return value
如果在调用pygame.display.set_mode时使用了pygame.OPENGL标志，最好检查一下请求的OpenGL属性的值。参看pygame.display.get_set_attribute来得到有效的标志列表。
14. pygame.display.gl_set_attribute
请求设置display的opengl显示属性
pygame.display.gl_set_attribute(flag, value): return None
当调用pygame.display.set_mode时指定了pygame.OPENGL标志，pygame会自动设置OpenGL的属性比如说颜色和双缓冲。你可能需要控制OpenGL提供的其它一些属性。把这些属性作为flag，它的值作为value调用这个函数。这个函数必须在pygame.display.set_mode之前调用。
OPENGL标志有：
- GL_ALPHA_SIZE, GL_DEPTH_SIZE, GL_STENCIL_SIZE, GL_ACCUM_RED_SIZE,
- GL_ACCUM_GREEN_SIZE, GL_ACCUM_BLUE_SIZE, GL_ACCUM_ALPHA_SIZE,
- GL_MULTISAMPLEBUFFERS, GL_MULTISAMPLESAMPLES, GL_STEREO
15. pygame.display.get_active
当display是活动的时候返回True
pygame.display.get_active(): return bool
在pygame.display.set_mode被调用之后，display Surface会在屏幕上显示出来。大部分窗口的display可以被用户隐藏。如果display Surface被用户隐藏或者最小化，这个函数会返回False。
16. pygame.display.iconify
最小化display Surface
pygame.display.iconify(): return bool
让display surface窗口最小化或者隐藏。不是所有系统都支持最小化的。这个函数在成功时会返回True。
当display被最小化，pygame.display.get_active会返回False。窗口最小化时事件队列会收到一个ACTIVEEVENT事件。
17. pygame.display.toggle_fullscreen
在窗口和全屏之间切换
- pygame.display.toggle_fullscreen(): return bool
在窗口和全屏模式之间切换。这个函数只有在unix x11下才能使用。大部分情况下，使用pygame.display.set_mode重新设置flags标志会更好。
18. pygame.display.set_gamma
修改硬件gamma梯度
pygame.display.set_gamma(red, green=None, blue=None): return bool
在显示硬件上设置红绿蓝gamma值。如果green和blue参数没有传，则它们的值和red一样。不是所有的硬件都支持gamma梯度，如果函数调用成功会返回True
gamma值为1.0会创建一个线性的颜色标。低的值会使显示变暗，高的值会使显示变量。
19. pygame.display.set_gamma_ramp
指定一个查询表来修改硬件gamma梯度
pygame.display.set_gamma_ramp(red, green, blue): return bool
指定一个查询表来设置red、green、blue三个gamma梯度值。每个参数都应该是256个整数，每个整数都应该在0和0xffff之间。不是所有的硬件都支持这个功能，如果函数调用成功它会返回True。
20. pygame.display.set_icon
修改显示窗口的图标
pygame.display.set_icon(Surface): return None
设置运行时系统中代表窗口的图标。所有的窗口都默认使用一个简单的pygame图标。
你可以传任何surface给它，但是多数系统只能使用大约32x32的图像。图像可以有一个colorkey指定透明色。
一些系统在图标显示后就不允许改变图标。这个函数可以在pygame.display.set_mode之前调用来创建图标。
21. pygame.display.set_caption
设置当前窗口的标题
pygame.display.set_caption(title, icontitle=None): return None
如果display有一个窗口标题，这个函数可以修改窗口的名字title。一些系统支持用一个可选的更短的名字icontitle用在最小化的窗口上。
22. pygame.display.get_caption
取得当前窗口的标题
pygame.display.get_caption(): return (title, icontitle)
返回display窗口的标题和短标题。这两个值通常是一样的。
23. pygame.display.set_palette
设置颜色调色板
pygame.display.set_palette(palette=None): return None
这个函数可以修改8位display的颜色调色板。这个函数不会修改实际display Surface的调色板，而只是修改用来显示这个Surface的调色板。如果没有指定palette参数，会恢复系统默认的调色板。调色板是RGB三元组的列表。
Surface
pygame里的Surface是用来表示图像的对象。Surface有一定的大小和像素格式。如果是8bit像素格式的Surface，它还会用一个调色板映射到24比特颜色。
调用pygame.Surface可以创建表示图像的新对象。Surface会整个全是黑的。唯一需要指定的参数是大小。如果不指定其他参数，Surface的像素格式会与display Surface的像素格式尽量一致。
像素格式可以通过指定像素深度或者已有的Surface来控制。flag标志位参数是其他一些Surface选项的集合，你可以指定如下的标志
- HWSURFACE, 在视频内存中创建图像
- SRCALPHA, 像素格式中会包含一个alpha通道
这些参数都仅仅是一个请求，在实际中可能并不能实现。
Advance users can combine a set of bitmasks with a depth value. The masks are a set of 4 integers representing which bits in a pixel will represent each color. Normal Surfaces should not require the masks argument.
Surfaces can have many extra attributes like alpha planes, colorkeys, source rectangle clipping. These functions mainly effect how the Surface is blitted to other Surfaces. The blit routines will attempt to use hardware acceleratio
- when possible, otherwise will use highly optimized software blitting methods.
There are three types of transparency supported in Pygame: colorkeys, surface alphas, and pixel alphas. Surface alphas can be mixed with colorkeys, but an image with per pixel alphas cannot use the other modes. Colorkey transparency makes a single color value transparent. Any pixels matching the colorkey will not be drawn. The surface alpha value is a single value that changes the transparency for the entire image. A surface alpha of 255 is opaque, and a value of 0 is completely transparent.
Per pixel alphas are different because they store a transparency value for every pixel. This allows for the most precise transparency effects, but it also the slowest. Per pixel alphas cannot be mixed with surface alpha and colorkeys.
There is support for pixel access for the Surfaces. Pixel access on hardware surfaces is slow and not recommended. Pixels can be accessed using the get_at() and set_at() functions. These methods are fine for simple access, but will be considerably slow when doing of pixel work with them. If you plan on doing a lot of pixel level work, it is recommended to use the pygame.surfarray module, which can treat the surfaces like large multidimensional arrays (and it's quite quick).
Any functions that directly access a surface's pixel data will need that surface to be lock()'ed. These functions can lock() and unlock() the surfaces themselves without assistance. But, if a function will be called many times, there will be a lot of overhead for multiple locking and unlocking of the surface. It is best to lock the surface manually before making the function call many times, and then unlocking when you are finished. All functions that need a locked surface will say so in their docs. Remember to leave the Surface locked only while necessary.
Surface pixels are stored internally as a single number that has all the colors encoded into it. Use the Surface.map_rgb - convert a color into a mapped color value and Surface.unmap_rgb - convert a mapped integer color value into a Color to convert between individual red, green, and blue values into a packed integer for that Surface.
Surfaces can also reference sections of other Surfaces. These are created with the Surface.subsurface - create a new surface that references its parent method. Any change to either Surface will effect the other.
Each Surface contains a clipping area. By default the clip area covers the entire Surface. If it is changed, all drawing operations will only effect the smaller area.
1. Surface.blit
- draw one image onto another Surface.blit(source, dest, area=None, special_flags = 0): return Rect Draws a source Surface onto this Surface. The draw can be positioned with the dest argument. Dest can either be pair of coordinates representing the upper left corner of the source. A Rect can also be passed as the destination and the topleft corner of the rectangle will be used as the position for the blit. The size of the destination rectangle does not effect the blit. An optional area rectangle can be passed as well. This represents a smaller portion of the source Surface to draw. An optional special flags is for passing in BLEND_ADD, BLEND_SUB, BLEND_MULT, BLEND_MIN, BLEND_MAX With other special blitting flags perhaps added in the future. The return rectangle is the area of the affected pixels, excluding any pixels outside the destination Surface, or outside the clipping area. Pixel alphas will be ignored when blitting to an 8 bit Surface. special_flags new in pygame 1.8.
2. Surface.convert
- change the pixel format of an image Surface.convert(Surface): return Surface Surface.convert(depth, flags=0): return Surface Surface.convert(masks, flags=0): return Surface Surface.convert(): return Surface Creates a new copy of the Surface with the pixel format changed. The new pixel format can be determined from another existing Surface. Otherwise depth, flags, and masks arguments can be used, similar to the pygame.Surface - pygame object for representing images call. If no arguments are passed the new Surface will have the same pixel format as the display Surface. This is always the fastest format for blitting. It is a good idea to convert all Surfaces before they are blitted many times. The converted Surface will have no pixel alphas. They will be stripped if the original had them. See Surface.convert_alpha - change the pixel format of an image including per pixel alphas for preserving or creating per-pixel alphas.
3. Surface.copy
- create a new copy of a Surface Surface.copy(): return Surface Makes a duplicate copy of a Surface. The new Surface will have the same pixel formats, color palettes, and transparency settings as the original.
4. Surface.fill
- fill Surface with a solid color Surface.fill(color, rect=None): return Rect Fill the Surface with a solid color. If no rect argument is given the entire Surface will be filled. The rect argument will limit the fill to a specific area. The fill will also be contained by the Surface clip area. The color argument can be either an RGB sequence or a mapped color index. This will return the affected Surface area.
5. Surface.set_colorkey
- Set the transparent colorkey Surface.set_colorkey(Color, flags=0): return None Surface.set_colorkey(None): return None Set the current color key for the Surface. When blitting this Surface onto a destination, and pixels that have the same color as the colorkey will be transparent. The color can be an RGB color or a mapped color integer. If None is passed, the colorkey will be unset. The colorkey will be ignored if the Surface is formatted to use per pixel alpha values. The colorkey can be mixed with the full Surface alpha value. The optional flags argument can be set to pygame.RLEACCEL to provide better performance on non accelerated displays. An RLEACCEL Surface will be slower to modify, but quicker to blit as a source.
6. Surface.get_at
- get the color value at a single pixel Surface.get_at((x, y)): return Color
Return the RGBA color value at the given pixel. If the Surface has no per pixel alpha, then the alpha value will always be 255 (opaque). If the pixel position is outside the area of the Surface an IndexError exception will be raised. Getting and setting pixels one at a time is generally too slow to be used in a game or realtime situation. This function will temporarily lock and unlock the Surface as needed.
7. Surface.set_at
- set the color value for a single pixel Surface.set_at((x, y), Color): return None Set the RGBA or mapped integer color value for a single pixel. If the Surface does not have per pixel alphas, the alpha value is ignored. Settting pixels outside the Surface area or outside the Surface clipping will have no effect. Getting and setting pixels one at a time is generally too slow to be used in a game or realtime situation. This function will temporarily lock and unlock the Surface as needed.
8. Surface.set_clip
- set the current clipping area of the Surface Surface.set_clip(rect): return None Surface.set_clip(None): return None Each Surface has an active clipping area. This is a rectangle that represents the only pixels on the Surface that can be modified. If None is passed for the rectangle the full Surface will be available for changes. The clipping area is always restricted to the area of the Surface itself. If the clip rectangle is too large it will be shrunk to fit inside the Surface.
9. Surface.get_clip
- get the current clipping are of the Surface Surface.get_clip(): return Rect Return a rectangle of the current clipping area. The Surface will always return a valid rectangle that will never be outside the bounds of the image. If the Surface has had None set for the clipping area, the Surface will return a rectangle with the full area of the Surface.
10. Surface.get_size
- get the dimensions of the Surface Surface.get_size(): return (width, height) Return the width and height of the Surface in pixels.
11. Surface.get_width
- get the width of the Surface Surface.get_width(): return width Return the width of the Surface in pixels.
12. Surface.get_height
- get the height of the Surface Surface.get_height(): return height Return the height of the Surface in pixels.
image
The image module contains functions for loading and saving pictures, as well as transferring Surfaces to formats usable by other packages.
Note that there is no Image class; an image is loaded as a Surface object. The Surface class allows manipulation (drawing lines, setting pixels, capturing regions, etc.).
The image module is a required dependency of Pygame, but it only optionally supports any extended file formats. By default it can only load uncompressed BMP images. When built with full image support, the pygame.image.load - load new image from a file function can support the following formats.
- JPG
- PNG
- GIF (non animated)
- BMP
- PCX
- TGA (uncompressed)
- TIF
- LBM (and PBM)
- PBM (and PGM, PPM)
- XPM
Saving images only supports a limited set of formats. You can save to the following formats.
- BMP
- TGA
- PNG
- JPEG
PNG, JPEG saving new in pygame 1.8.
1. pygame.image.load
- load new image from a file pygame.image.load(filename): return Surface pygame.image.load(fileobj, namehint=""): return Surface Load an image from a file source. You can pass either a filename or a Python file-like object. Pygame will automatically determine the image type (e.g., GIF or bitmap) and create a new Surface object from the data. In some cases it will need to know the file extension (e.g., GIF images should end in ".gif"). If you pass a raw file-like object, you may also want to pass the original filename as the namehint argument. The returned Surface will contain the same color format, colorkey and alpha transparency as the file it came from. You will often want to call Surface.convert - change the pixel format of an image with no arguments, to create a copy that will draw more quickly on the screen. For alpha transparency, like in .png images use the convert_alpha() method after loading so that the image has per pixel transparency. Pygame may not always be built to support all image formats. At minimum it will support uncompressed BMP. If pygame.image.get_extended - test if extended image formats can be loaded returns 'True', you should be able to load most images( including png, jpg and gif ). You should use os.path.join() for compatibility.
- eg. asurf = pygame.image.load(os.path.join('data', 'bla.png'))
2. pygame.image.save
- save an image to disk pygame.image.save(Surface, filename): return None This will save your Surface as either a BMP, TGA, PNG, or JPEG image. If the filename extension is unrecognized it will default to TGA. Both TGA, and BMP file formats create uncompressed files. PNG, JPEG saving new in pygame 1.8.
3. pygame.image.tostring
- transfer image to string buffer pygame.image.tostring(Surface, format, flipped=False): return string Creates a string that can be transferred with the 'fromstring' method in other Python imaging packages. Some Python image packages prefer their images in bottom-to-top format (PyOpenGL for example). If you pass True for the flipped argument, the string buffer will be vertically flipped. The format argument is a string of one of the following values. Note that only 8bit Surfaces can use the "P" format. The other formats will work for any Surface. Also note that other Python image packages support more formats than Pygame.
- o P, 8bit palettized Surfaces o RGB, 24bit image o RGBX, 32bit image with unused space o RGBA, 32bit image with an alpha channel o ARGB, 32bit image with alpha channel first
4. pygame.image.fromstring
- create new Surface from a string buffer pygame.image.fromstring(string, size, format, flipped=False): return Surface This function takes arguments similar to pygame.image.tostring - transfer image to string buffer. The size argument is a pair of numbers representing the width and height. Once the new Surface is created you can destroy the string buffer. The size and format image must compute the exact same size as the passed string buffer. Otherwise an exception will be raised. See the pygame.image.frombuffer - create a new Surface that shares data inside a string buffer method for a potentially faster way to transfer images into Pygame.
draw
Draw several simple shapes to a Surface. These functions will work for rendering to any format of Surface. Rendering to hardware Surfaces will be slower than regular software Surfaces.
Most of the functions take a width argument to represent the size of stroke around the edge of the shape. If a width of 0 is passed the function will actually solid fill the entire shape.
All the drawing functions respect the clip area for the Surface, and will be constrained to that area. The functions return a rectangle representing the bounding area of changed pixels.
Most of the arguments accept a color argument that is an RGB triplet. These can also accept an RGBA quadruplet. The alpha value will be written directly into the Surface if it contains pixel alphas, but the draw function will not draw transparently. The color argument can also be an integer pixel value that is already mapped to the Surface's pixel format.
These functions must temporarily lock the Surface they are operating on. Many sequential drawing calls can be sped up by locking and unlocking the Surface object around the draw calls.
1. pygame.draw.rect
- draw a rectangle shape pygame.draw.rect(Surface, color, Rect, width=0): return Rect Draws a rectangular shape on the Surface. The given Rect is the area of the rectangle. The width argument is the thickness to draw the outer edge. If width is zero then the rectangle will be filled. Keep in mind the Surface.fill - fill Surface with a solid color method works just as well for drawing filled rectangles. In fact the Surface.fill - fill Surface with a solid color can be hardware accelerated on some platforms with both software and hardware display modes.
2. pygame.draw.polygon
- draw a shape with any number of sides pygame.draw.polygon(Surface, color, pointlist, width=0): return Rect Draws a polygonal shape on the Surface. The pointlist argument is the vertices of the polygon. The width argument is the thickness to draw the outer edge. If width is zero then the polygon will be filled. For aapolygon, use aalines with the 'closed' parameter.
3. pygame.draw.circle
- draw a circle around a point pygame.draw.circle(Surface, color, pos, radius, width=0): return Rect Draws a circular shape on the Surface. The pos argument is the center of the circle, and radius is the size. The width argument is the thickness to draw the outer edge. If width is zero then the circle will be filled.
4. pygame.draw.ellipse
- draw a round shape inside a rectangle pygame.draw.ellipse(Surface, color, Rect, width=0): return Rect Draws an elliptical shape on the Surface. The given rectangle is the area that the circle will fill. The width argument is the thickness to draw the outer edge. If width is zero then the ellipse will be filled.
5. pygame.draw.arc
- draw a partial section of an ellipse pygame.draw.arc(Surface, color, Rect, start_angle, stop_angle, width=1): return Rect Draws an elliptical arc on the Surface. The rect argument is the area that the ellipse will fill. The two angle arguments are the initial and final angle in radians, with the zero on the right. The width argument is the thickness to draw the outer edge.
6. pygame.draw.line
- draw a straight line segment pygame.draw.line(Surface, color, start_pos, end_pos, width=1): return Rect Draw a straight line segment on a Surface. There are no endcaps, the ends are squared off for thick lines.
7. pygame.draw.lines
- draw multiple contiguous line segments pygame.draw.lines(Surface, color, closed, pointlist, width=1): return Rect Draw a sequence of lines on a Surface. The pointlist argument is a series of points that are connected by a line. If the closed argument is true an additional line segment is drawn between the first and last points. This does not draw any endcaps or miter joints. Lines with sharp corners and wide line widths can have improper looking corners.
8. pygame.draw.aaline
- draw fine antialiased lines pygame.draw.aaline(Surface, color, startpos, endpos, blend=1): return Rect Draws an anti-aliased line on a surface. This will respect the clipping rectangle. A bounding box of the affected area is returned returned as a rectangle. If blend is true, the shades will be be blended with existing pixel shades instead of overwriting them. This function accepts floating point values for the end points.
9. pygame.draw.aalines
- pygame.draw.aalines(Surface, color, closed, pointlist, blend=1): return Rect Draws a sequence on a surface. You must pass at least two points in the sequence of points. The closed argument is a simple boolean and if true, a line will be draw between the first and last points. The boolean blend argument set to true will blend the shades with existing shades instead of overwriting them. This function accepts floating point values for the end points.
font
The font module allows for rendering TrueType fonts into a new Surface object. This module is optional and requires SDL_ttf as a dependency. You should test that pygame.font is available and initialized before attempting to use the module.
Most of the work done with fonts are done by using the actual Font objects. The module by itself only has routines to initialize the module and create Font objects with pygame.font.Font - create a new Font object from a file.
You can load fonts from the system by using the pygame.font.SysFont - create a Font object from the system fonts function. There are a few other functions to help lookup the system fonts.
Pygame comes with a builtin default font. This can always be accessed by passing None as the font name.
1. pygame.font.init
- initialize the font module pygame.font.init(): return None This method is called automatically by pygame.init - initialize all imported pygame modules. It initializes the font module. The module must be initialized before any other functions will work. It is safe to call this function more than once.
2. pygame.font.quit
- uninitialize the font module pygame.font.quit(): return None Manually uninitialize SDL_ttf's font system. This is called automatically by pygame.quit - uninitialize all pygame modules. It is safe to call this function even if font is currently not initialized.
3. pygame.font.get_init
- true if the font module is initialized pygame.font.get_init(): return bool Test if the font module is initialized or not.
4. pygame.font.get_default_font
- get the filename of the default font pygame.font.get_default_font(): return string Return the filename of the system font. This is not the full path to the file. This file can usually be found in the same directory as the font module, but it can also be bundled in separate archives.
5. pygame.font.get_fonts
- get all available fonts pygame.font.get_fonts(): return list of strings Returns a list of all the fonts available on the system. The names of the fonts will be set to lowercase with all spaces and punctuation removed. This works on most systems, but some will return an empty list if they cannot find fonts.
6. pygame.font.match_font
- find a specific font on the system pygame.font.match_font(name, bold=False, italic=False): return path Returns the full path to a font file on the system. If bold or italic are set to true, this will attempt to find the correct family of font. The font name can actually be a comma separated list of font names to try. If none of the given names are found, None is returned. Example:
- print pygame.font.match_font('bitstreamverasans') # output is: /usr/share/fonts/truetype/ttf-bitstream-vera/Vera.ttf # (but only if you have Vera on your system)
7. pygame.font.SysFont
- create a Font object from the system fonts
pygame.font.SysFont(name, size, bold=False, italic=False): return Font Return a new Font object that is loaded from the system fonts. The font will match the requested bold and italic flags. If a suitable system font is not found this will fallback on loading the default pygame font. The font name can be a comma separated list of font names to look for.
8. pygame.font.Font
- create a new Font object from a file pygame.font.Font(filename, size): return Font pygame.font.Font(object, size): return Font
- Font.render - draw text on a new Surface draw text on a new Surface Font.size - determine the amount of space needed to render text determine the amount of space needed to render text Font.set_underline - control if text is rendered with an underline control if text is rendered with an underline Font.get_underline - check if text will be rendered with an underline check if text will be rendered with an underline Font.set_bold - enable fake rendering of bold text enable fake rendering of bold text Font.get_bold - check if text will be rendered bold check if text will be rendered bold Font.set_italic - enable fake rendering of italic text enable fake rendering of italic text Font.get_italic - check if the text will be rendered italic check if the text will be rendered italic Font.get_linesize - get the line space of the font text get the line space of the font text Font.get_height - get the height of the font get the height of the font Font.get_ascent - get the ascent of the font get the ascent of the font Font.get_descent - get the descent of the font get the descent of the font
8.1. Font.render
- draw text on a new Surface Font.render(text, antialias, color, background=None): return Surface This creates a new Surface with the specified text rendered on it. Pygame provides no way to directly draw text on an existing Surface: instead you must use Font.render - draw text on a new Surface to create an image (Surface) of the text, then blit this image onto another Surface. The text can only be a single line: newline characters are not rendered. The antialias argument is a boolean: if true the characters will have smooth edges. The color argument is the color of the text [e.g.: (0,0,255) for blue]. The optional background argument is a color to use for the text background. If no background is passed the area outside the text will be transparent. The Surface returned will be of the dimensions required to hold the text. (the same as those returned by Font.size()). If an empty string is passed for the text, a blank surface will be returned that is one pixel wide and the height of the font. Depending on the type of background and antialiasing used, this returns different types of Surfaces. For performance reasons, it is good to know what type of image will be used. If antialiasing is not used, the return image will always be an 8bit image with a two color palette. If the background is transparent a colorkey will be set. Antialiased images are rendered to 24-bit RGB images. If the background is transparent a pixel alpha will be included. Optimization: if you know that the final destination for the text (on the screen) will always have a solid background, and the text is antialiased, you can improve performance by specifying the background color. This will cause the resulting image to maintain transparency information by colorkey rather than (much less efficient) alpha values. If you render '\n' a unknown char will be rendered. Usually a rectangle. Instead you need to handle new lines yourself. Font rendering is not thread safe: only a single thread can render text any time.
8.2. Font.size
- determine the amount of space needed to render text Font.size(text): return (width, height) Returns the dimensions needed to render the text. This can be used to help determine the positioning needed for text before it is rendered. It can also be used for wordwrapping and other layout effects. Be aware that most fonts use kerning which adjusts the widths for specific letter pairs. For example, the width for "ae" will not always match the width for "a" + "e".
8.3. Font.set_underline
- control if text is rendered with an underline Font.set_underline(bool): return None When enabled, all rendered fonts will include an underline. The underline is always one pixel thick, regardless of font size. This can be mixed with the bold and italic modes.
8.4. Font.get_underline
- check if text will be rendered with an underline Font.get_underline(): return bool Return True when the font underline is enabled.
8.5. Font.set_bold
- enable fake rendering of bold text Font.set_bold(bool): return None Enables the bold rendering of text. This is a fake stretching of the font that doesn't look good on many font types. If possible load the font from a real bold font file. While bold, the font will have a different width than when normal. This can be mixed with the italic and underline modes.
8.6. Font.get_bold
- check if text will be rendered bold Font.get_bold(): return bool Return True when the font bold rendering mode is enabled.
8.7. Font.set_italic
- enable fake rendering of italic text Font.set_bold(bool): return None Enables fake rendering of italic text. This is a fake skewing of the font that doesn't look good on many font types. If possible load the font from a real italic font file. While italic the font will have a different width than when normal. This can be mixed with the bold and underline modes.
8.8. Font.get_italic
- check if the text will be rendered italic Font.get_italic(): return bool Return True when the font italic rendering mode is enabled.
8.9. Font.get_linesize
- get the line space of the font text Font.get_linesize(): return int Return the height in pixels for a line of text with the font. When rendering multiple lines of text this is the recommended amount of space between lines.
8.10. Font.get_height
- get the height of the font Font.get_height(): return int Return the height in pixels of the actual rendered text. This is the average size for each glyph in the font.
8.11. Font.get_ascent
- get the ascent of the font Font.get_ascent(): return int Return the height in pixels for the font ascent. The ascent is the number of pixels from the font baseline to the top of the font.
8.12. Font.get_descent
- get the descent of the font Font.get_descent(): return int Return the height in pixels for the font descent. The descent is the number of pixels from the font baseline to the bottom of the font.