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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# OT-SVG example, alternative version based on Skia
#
# Copyright 2023 Hin-Tak Leung
# Distributed under the terms of the new BSD license.
# See also the other one, the rsvg-based OT-SVG example.
# "ot-svg-draw-skia.py" was written based on skia m87.
# This example requires m117, and also accelerated GL integration;
# should work on any OT-SVG font, unlike "ot-svg-draw-skia.py".
if __name__ == '__main__':
import sys
from ctypes import byref, pythonapi, cast, c_char_p
from freetype import Face, get_handle, FT_Property_Set, FT_LOAD_COLOR, FT_LOAD_RENDER
from OpenGL import GL
import glfw
import skia
from skia import ImageInfo, ColorType, AlphaType
from skia_ot_svg_module import hooks
from skia_glfw_module import glfw_window, skia_surface
execname = sys.argv[0]
if len(sys.argv) < 2:
print("Example usage: %s TrajanColor-Concept.otf" % execname)
exit(1)
face = Face(sys.argv[1])
face.set_char_size( 160*64 )
library = get_handle()
FT_Property_Set( library, b"ot-svg", b"svg-hooks", byref(hooks) ) # python 3 only syntax
face.load_char('A', FT_LOAD_COLOR | FT_LOAD_RENDER )
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
if ( face.glyph.bitmap.pitch != width * 4 ):
raise RuntimeError('pitch != width * 4 for color bitmap: Please report this.')
WIDTH, HEIGHT = 2*width, rows
glyphBitmap = skia.Bitmap()
glyphBitmap.setInfo(ImageInfo.Make(bitmap.width, bitmap.rows,
ColorType.kBGRA_8888_ColorType,
AlphaType.kPremul_AlphaType),
bitmap.pitch)
glyphBitmap.setPixels(pythonapi.PyMemoryView_FromMemory(cast(bitmap._FT_Bitmap.buffer, c_char_p),
bitmap.rows * bitmap.pitch,
0x200), # Read-Write
)
with glfw_window(WIDTH, HEIGHT) as window:
GL.glClear(GL.GL_COLOR_BUFFER_BIT)
with skia_surface(window) as surface:
with surface as canvas:
canvas.drawBitmap(glyphBitmap, 0, 0)
canvas.drawBitmap(glyphBitmap, width/2, 0)
canvas.drawBitmap(glyphBitmap, width, 0)
surface.flushAndSubmit()
glfw.swap_buffers(window)
while (glfw.get_key(window, glfw.KEY_ESCAPE) != glfw.PRESS
and not glfw.window_should_close(window)):
glfw.wait_events()
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