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Further optimize calculate_dirty_region() by pre-calculating the cell rects

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This commit is contained in:
Kovid Goyal 2016-10-21 17:59:26 +05:30
parent a0664dbbf0
commit 62d2978d1e
1 changed files with 11 additions and 3 deletions
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14
kitty/render.py
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@ -90,6 +90,14 @@ class Renderer(QObject):
self.vmargin = (size.height() % self.cell_height) // 2
self.line_positions = tuple(self.vmargin + i * self.cell_height for i in range(self.lines_per_screen))
self.cell_positions = tuple(self.hmargin + i * self.cell_width for i in range(self.cells_per_line))
self.row_rects = {lnum: QRect(self.hmargin, self.line_positions[lnum], self.cell_width *
self.cells_per_line, self.cell_height) for lnum in range(self.lines_per_screen)}
self.col_rects = {cnum: QRect(self.cell_positions[cnum], self.vmargin, self.cell_width,
self.cell_height * self.lines_per_screen) for cnum in range(self.cells_per_line)}
self.cell_rects = {
lnum: {cnum: self.col_rects[cnum].intersected(self.row_rects[lnum]) for cnum in self.col_rects}
for lnum in self.row_rects
}
self.line_width = self.cells_per_line * self.cell_width
if (previous, previousl) != (self.cells_per_line, self.lines_per_screen):
self.screen.resize(self.lines_per_screen, self.cells_per_line)
@ -176,12 +184,12 @@ class Renderer(QObject):
def calculate_dirty_region(self, dirty_lines, dirty_cell_ranges):
ans = QRegion()
for lnum in dirty_lines:
ans += QRect(self.hmargin, self.line_positions[lnum], self.cell_width * self.cells_per_line, self.cell_height)
ans += self.row_rects[lnum]
for lnum, ranges in dirty_cell_ranges.items():
y = self.line_positions[lnum]
lrect = self.cell_rects[lnum]
for start, stop in ranges:
for cnum in range(start, stop + 1):
ans += QRect(self.cell_positions[cnum], y, self.cell_width, self.cell_height)
ans += lrect[cnum]
return ans
def paint(self, dirty_lines, dirty_cell_ranges, screen_dirtied):