140 lines
4.5 KiB
Python
140 lines
4.5 KiB
Python
#!/usr/bin/env python
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# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
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from ctypes import addressof
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from functools import partial
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from itertools import chain
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from .constants import GLfloat, GLint, GLuint, viewport_size
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from .fast_data_types import (
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GL_STATIC_DRAW, GL_TRIANGLE_FAN, glMultiDrawArrays, glUniform3fv
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)
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from .shaders import ShaderProgram, load_shaders
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from .utils import pt_to_px
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def as_color(c):
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return c[0] / 255, c[1] / 255, c[2] / 255
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def to_opengl(x, y):
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return -1 + 2 * x / viewport_size.width, 1 - 2 * y / viewport_size.height
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def as_rect(left, top, right, bottom, color=0):
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for (x, y) in ((right, top), (right, bottom), (left, bottom), (left, top)):
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x, y = to_opengl(x, y)
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yield x
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yield y
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yield color
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class BordersProgram(ShaderProgram):
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def __init__(self):
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ShaderProgram.__init__(self, *load_shaders('border'))
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with self.array_object_creator() as add_attribute:
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self.vao_id = add_attribute.vao_id
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add_attribute('rect')
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def send_data(self, data):
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self.send_vertex_data(self.vao_id, data, usage=GL_STATIC_DRAW)
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def set_colors(self, color_buf):
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glUniform3fv(self.uniform_location('colors'), 3, addressof(color_buf))
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def border_maker(rects):
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' Create a function that will add all the rectangles for drawing a border to rects '
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def r(l, t, b, r, color):
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rects.extend(as_rect(l, t, b, r, color))
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def vertical_edge(color, width, top, bottom, left):
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r(left, top, left + width, bottom, color)
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def horizontal_edge(color, height, left, right, top):
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r(left, top, right, top + height, color)
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def edge(func, color, sz, a, b):
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return partial(func, color, sz, a, b)
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def border(color, sz, left, top, right, bottom):
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horz = edge(horizontal_edge, color, sz, left, right)
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horz(top), horz(bottom - sz) # top, bottom edges
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vert = edge(vertical_edge, color, sz, top, bottom)
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vert(left), vert(right - sz) # left, right edges
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return border
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class Borders:
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def __init__(self, opts):
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self.is_dirty = False
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self.can_render = False
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self.border_width = pt_to_px(opts.window_border_width)
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self.padding_width = pt_to_px(opts.window_padding_width)
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self.color_buf = (GLfloat * 9)(
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*as_color(opts.background), *as_color(opts.active_border_color),
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*as_color(opts.inactive_border_color))
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def __call__(
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self,
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windows,
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active_window,
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current_layout,
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extra_blank_rects,
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draw_window_borders=True
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):
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rects = []
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for br in chain(current_layout.blank_rects, extra_blank_rects):
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rects.extend(as_rect(*br))
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bw, pw = self.border_width, self.padding_width
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fw = bw + pw
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border = border_maker(rects)
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if fw > 0:
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for w in windows:
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g = w.geometry
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if bw > 0 and draw_window_borders:
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# Draw the border rectangles
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color = 1 if w is active_window else 2
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border(
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color, bw, g.left - fw, g.top - fw, g.right + fw,
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g.bottom + fw)
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if pw > 0:
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# Draw the background rectangles over the padding region
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color = 0
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border(
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color, pw, g.left - pw, g.top - pw, g.right + pw,
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g.bottom + pw)
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self.num_of_rects = len(rects) // 12
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self.rects = (GLfloat * len(rects))()
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self.starts = (GLint * self.num_of_rects)()
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self.counts = (GLuint * self.num_of_rects)()
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for i, x in enumerate(rects):
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self.rects[i] = x
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if i % 12 == 0:
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idx = i // 12
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self.starts[idx] = i // 3
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self.counts[idx] = 4
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self.is_dirty = True
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self.can_render = True
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def render(self, program):
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if not self.can_render:
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return
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with program:
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if self.is_dirty:
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program.send_data(self.rects)
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program.set_colors(self.color_buf)
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self.is_dirty = False
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with program.bound_vertex_array(program.vao_id):
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glMultiDrawArrays(
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GL_TRIANGLE_FAN,
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addressof(self.starts),
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addressof(self.counts), self.num_of_rects)
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