legoEv3/ev3dev2/__pycache__/display.cpython-35.pyc
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d d Z e d d d Z e d d Z e d d Z e d d Z e d d Z d S) FbMemzThe framebuffer memory object.
Made of:
- the framebuffer file descriptor
- the fix screen info struct
- the var screen info struct
- the mapped memory
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FixScreenInfoT s r c
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e f d e f g Z d S)zFbMem.VarScreenInfoc @ s@ e Z d Z d Z d e j f d e j f d e j f g Z d S)z FbMem.VarScreenInfo.FbBitFieldz!The fb_bitfield struct from fb.h.offsetZlengthZ msb_rightN)r r r r r r r r r r r
FbBitFieldk s r! xresyresZ xres_virtualZ yres_virtualZxoffsetZyoffsetbits_per_pixelZ grayscaleZredZgreenZblueZtranspN)r r r r Structurer! r r r r r r
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r& Nc C sa t j | } t j | } t j | | } | | _ | | _ t j | | _ | | _ d S)z+Create the FbMem framebuffer memory object.N) r
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_get_var_infor r )selffbdevr r Zfbmmapr r r __init__ s zFbMem.__init__c C s! | j j t j | j d S)z*Close the FbMem framebuffer memory object.N)r closer
_close_fbdevr )r+ r r r __del__ s
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FbMem.__del__c C s1 | p t j d d } t j | t j } | S)zReturn the framebuffer file descriptor.
Try to use the FRAMEBUFFER
environment variable if fbdev is not given. Use '/dev/fb0' by
default.
Z FRAMEBUFFERz/dev/fb0)osgetenvopenO_RDWR)r, Zdevfbfidr r r r' s zFbMem._open_fbdevc C s t j | d S)z&Close the framebuffer file descriptor.N)r1 r. )r5 r r r r/ s zFbMem._close_fbdevc C s& t j } t j | t j | | S)z@Return the fix screen info from the framebuffer file descriptor.)r
r r ioctlFBIOGET_FSCREENINFO)r5 r r r r r( s zFbMem._get_fix_infoc C s& t j } t j | t j | | S)z@Return the var screen info from the framebuffer file descriptor.)r
r& r r6 FBIOGET_VSCREENINFO)r5 r r r r r* s zFbMem._get_var_infoc C s, t j | | j t j t j t j Bd d S)zMap the framebuffer memory.r r )r r Z
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PROT_WRITE)r5 r r r r r) s zFbMem._map_fb_memory)r r r r )r r r r __slots__r8 r7 ZFB_VISUAL_MONO01ZFB_VISUAL_MONO10r r% r r& r- r0 staticmethodr' r/ r( r* r) r r r r r
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A convenience wrapper for the FbMem class.
Provides drawing functions from the python imaging library (PIL).
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Horizontal screen resolution
)r r" )r+ r r r r" s z Display.xresc C s
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Vertical screen resolution
)r r# )r+ r r r r# s z Display.yresc C s | j | j f S)z+
Dimensions of the screen.
)r" r# )r+ r r r shape s z
Display.shapec C s | j S)z
Returns a handle to PIL.ImageDraw.Draw class associated with the screen.
Example::
screen.draw.rectangle((10,10,60,20), fill='black')
)rI )r+ r r r draw s z Display.drawc C s | j S)z
Returns a handle to PIL.Image class that is backing the screen. This can
be accessed for blitting images to the screen.
Example::
screen.image.paste(picture, (0, 0))
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Display.imagec C s# | j j d | j f d d d S)z#
Clears the screen
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Display.clearc C s | d @d >| d @d >B| d ?BS)zuConvert red, green, blue components to a 16-bit 565 RGB value. Components
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len)r+ Zpixelsr )r+ r _img_to_rgb565_bytes s "z Display._img_to_rgb565_bytesc C s | j j d k rC | j j d d } | | j d t | <n | j j d k rq | j | j d d <n[ | j d k r | j j d k r | j j d j d d | j d d <n t d
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Applies pending changes to the screen.
Nothing will be drawn on the screen until this function is called.
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Draw a line from (x1, y1) to (x2, y2)
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Draw a circle of 'radius' centered at (x, y)
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Draw a rectangle 'width x height' where the top left corner is at (x, y)
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Draw a single pixel at (x, y)
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Display `text` starting at pixel (x, y).
The EV3 display is 178x128 pixels
- (0, 0) would be the top left corner of the display
- (89, 64) would be right in the middle of the display
'text_color' : PIL says it supports "common HTML color names". There
are 140 HTML color names listed here that are supported by all modern
browsers. This is probably a good list to start with.
https://www.w3schools.com/colors/colors_names.asp
'font' : can be any font displayed here
http://ev3dev-lang.readthedocs.io/projects/python-ev3dev/en/ev3dev-stretch/other.html#bitmap-fonts
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Display 'text' starting at grid (x, y)
The EV3 display can be broken down in a grid that is 22 columns wide
and 12 rows tall. Each column is 8 pixels wide and each row is 10
pixels tall.
'text_color' : PIL says it supports "common HTML color names". There
are 140 HTML color names listed here that are supported by all modern
browsers. This is probably a good list to start with.
https://www.w3schools.com/colors/colors_names.asp
'font' : can be any font displayed here
http://ev3dev-lang.readthedocs.io/projects/python-ev3dev/en/ev3dev-stretch/other.html#bitmap-fonts
r z7grid columns must be between 0 and %d, %d was requestedr z4grid rows must be between 0 and %d, %d was requested)r GRID_COLUMNSrt GRID_ROWSrx GRID_COLUMN_PIXELSGRID_ROW_PIXELS)r+ ru ra rl rm rw rs r r r text_grid s ""
zDisplay.text_gridc C s | j | j d S)N)rQ r_ )r+ r r r reset_screen s
zDisplay.reset_screen) r r r r ry r{ rz r| r- rK propertyr" r# rL rM rN rQ rW r\ r_ rf ri rp rP rr rx r} r~ r r r r r s0 !
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