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commit eef84fa42d26341f4dd66b35672957fa35e23b8e Author: Cyril Hrubis metan@ucw.cz Date: Sat Mar 23 17:22:57 2013 +0100

docs,demos: Add python gfx demo, continue docs.

diff --git a/demos/py_simple/gfx.py b/demos/py_simple/gfx.py new file mode 100755 index 0000000..9c1ce13 --- /dev/null +++ b/demos/py_simple/gfx.py @@ -0,0 +1,168 @@ +#!/usr/bin/env python + +import sys + +import gfxprim.core as core +import gfxprim.gfx as gfx +import gfxprim.backends as backends +import gfxprim.input as input + +def fill(bk): + color = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bk.context.gfx.Fill(color) + bk.Flip() + +def hline(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + for i in range(0, bk.context.h, 10): + bk.context.gfx.HLine(0, bk.context.w, i, fg) + bk.Flip() + +def vline(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + for i in range(0, bk.context.w, 10): + bk.context.gfx.VLine(i, 0, bk.context.h, fg) + + bk.Flip() + +def line(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + for i in range(0, 2 * max(bk.context.w, bk.context.h), 13): + bk.context.gfx.Line(0, i, i, 0, fg) + + bk.Flip() + +def rect(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + for i in range(10, 130, 10): + bk.context.gfx.Rect(i, i, bk.context.w - i, bk.context.h - i, fg) + + bk.Flip() + +def triangle(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + w = bk.context.w + h = bk.context.h + + for i in range(10, 90, 10): + bk.context.gfx.Triangle(2*i, i, w - 2*i, i, w//2, h - 2*i, fg) + + bk.Flip() + +def tetragon(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + w = bk.context.w + h = bk.context.h + + for i in range(10, 70, 10): + bk.context.gfx.Tetragon(i, i, w-2*i, i, w-i, h-i, 2*i, h-i, fg) + + bk.Flip() + +def polygon(bk): + fg = bk.context.RGBToPixel(0xee, 0xee, 0xee) + bg = bk.context.RGBToPixel(0, 0, 0); + + bk.context.gfx.Fill(bg) + + w = bk.context.w + h = bk.context.h + + polygon = [(10, 10), (10, (h-10)//3), ((w-10)//3, (h-10)//2), + (10, 2*(h-10)//3), (10, h-10), ((w-10)//3, h-10), + ((w-10)//2, 2*(h-10)//3), (2*(w-10)//3, h-10), + (w-10, h-10), (w-10, 2*(h-10)//3), (2*(w-10)//3, (h-10)//2), + (w-10, (h-10)//3), (w-10, 10), (2*(w-10)//3, 10), + ((w-10)//2, (h-10)//3), ((w-10)//3, 10)] + + bk.context.gfx.Polygon(polygon, fg) + + bk.Flip() + +def next(bk, i): + + if (i == 0): + fill(bk) + + if (i == 1): + hline(bk) + + if (i == 2): + vline(bk) + + if (i == 3): + line(bk) + + if (i == 4): + rect(bk) + + if (i == 5): + triangle(bk) + + if (i == 6): + tetragon(bk) + + if (i == 7): + polygon(bk) + + i = i + 1; + + if (i >= 8): + i = 0 + + return i + +def main(): + print(dir(gfx)) + + # Create X11 window + bk = backends.BackendX11Init(None, 0, 0, 320, 240, "GFX demo", 0) + assert(bk) + print(dir(bk.context.gfx)) + + bk.Flip() + + i = 0 + + # Event loop + while True: + ev = bk.Wait() + + input.EventDump(ev) + + if (ev.type == input.EV_KEY and ev.code == input.EV_KEY_DOWN): + + if (ev.val.val == input.KEY_ESC): + sys.exit(0) + + i = next(bk, i) + + if (ev.type == input.EV_SYS): + if (ev.code == input.EV_SYS_QUIT): + sys.exit(0) + +if __name__ == '__main__': + main() diff --git a/doc/example_py_gfx.txt b/doc/example_py_gfx.txt new file mode 100644 index 0000000..2c8854d --- /dev/null +++ b/doc/example_py_gfx.txt @@ -0,0 +1,8 @@ +Gfx +--- +.A simple program to show how to use gfx + +[source,python] +------------------------------------------------------------------ +include::../demos/py_simple/gfx.py[] +------------------------------------------------------------------ diff --git a/doc/gfx_python.txt b/doc/gfx_python.txt index 28f8899..3644358 100644 --- a/doc/gfx_python.txt +++ b/doc/gfx_python.txt @@ -17,6 +17,10 @@ pixel type (context), from a RGB triplet.

All drawing functions are clipped. Drawing outside of a context is no-op.

+WARNING: Drawing functions takes strictly integer coordinates, make sure that + all divisions are integer divisions (i.e. use // instead of /) to + ensure portability with Python 3.X. + [source,python] ------------------------------------------------------------------------------- import gfxprim.gfx as gfx @@ -32,6 +36,7 @@ Fills context with particualr 'pixel' value. import gfxprim.gfx as gfx

context.gfx.HLine(x0, x1, y, pixel) + -------------------------------------------------------------------------------

Draws a horizontal line from 'x0' to 'x1' at 'y'. @@ -41,8 +46,64 @@ Draws a horizontal line from 'x0' to 'x1' at 'y'. import gfxprim.gfx as gfx

context.gfx.VLine(x, y0, y1, pixel) + -------------------------------------------------------------------------------

Draws a vertical line from 'y0' to 'y1' at 'x'.

+[source,python] +------------------------------------------------------------------------------- +import gfxprim.gfx as gfx + + context.gfx.Line(x0, y0, x1, y1, pixel) + +------------------------------------------------------------------------------- + +Draws a line from x0, y0 to x1, y1. + +[source,python] +------------------------------------------------------------------------------- +import gfxprim.gfx as gfx + + context.gfx.Rect(x0, y0, x1, y1, pixel) + +------------------------------------------------------------------------------- + +Draws a rectangle defined by two points. + +[source,python] +------------------------------------------------------------------------------- +import gfxprim.gfx as gfx + + context.gfx.Triangle(x0, y0, x1, y1, x1, y2, pixel) + +------------------------------------------------------------------------------- + +Draws a triangle defined by three points. + +[source,python] +------------------------------------------------------------------------------- +import gfxprim.gfx as gfx + + context.gfx.Tetragon(x0, y0, x1, y1, x1, y2, x3, y3, pixel) + +------------------------------------------------------------------------------- + +Draws a tetragon defined by four points. + +[source,python] +------------------------------------------------------------------------------- +import gfxprim.gfx as gfx + + context.gfx.Polygon([x0, y0, x1, y1, ...], pixel) + + context.gfx.Polygon([(x0, y0), (x1, y1), ...], pixel) + +------------------------------------------------------------------------------- + +Draws a polygon defined by points, points can be either flat list of 2N +integers or list of N tuples. + + +TIP: See gfx module link:example_py_gfx.html[example].

-----------------------------------------------------------------------

Summary of changes: demos/py_simple/gfx.py | 168 ++++++++++++++++++++ ...example_py_showimage.txt => example_py_gfx.txt} | 8 +- doc/gfx_python.txt | 61 +++++++ 3 files changed, 233 insertions(+), 4 deletions(-) create mode 100755 demos/py_simple/gfx.py copy doc/{example_py_showimage.txt => example_py_gfx.txt} (59%)

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