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Get background_opacity working, at the cost of breaking negative z-index image rendering.

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Image rendering will need to use an FBO since OpenGL cannot do proper alpha compositing.
As a first step, the interleaved shaders now generate premultiplied colors as opengl can only alpha blend pre-multipled colors
This commit is contained in:
Kovid Goyal
2017-11-23 09:39:13 +05:30
parent fe214f43cb
commit f85c050235
7 changed files with 187 additions and 104 deletions
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24
kitty/window.py
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@@ -12,13 +12,12 @@ from .constants import (
ScreenGeometry, WindowGeometry, appname, get_boss, wakeup
)
from .fast_data_types import (
BRACKETED_PASTE_END, BRACKETED_PASTE_START, CELL_BACKGROUND_PROGRAM,
CELL_FOREGROUND_PROGRAM, CELL_PROGRAM, CELL_SPECIAL_PROGRAM,
CURSOR_PROGRAM, GRAPHICS_PROGRAM, SCROLL_FULL, SCROLL_LINE, SCROLL_PAGE,
Screen, add_window, compile_program, glfw_post_empty_event,
init_cell_program, init_cursor_program, set_clipboard_string,
set_window_render_data, update_window_title, update_window_visibility,
viewport_for_window
BRACKETED_PASTE_END, BRACKETED_PASTE_START, CELL_BG_PROGRAM,
CELL_FG_PROGRAM, CELL_PROGRAM, CELL_SPECIAL_PROGRAM, CURSOR_PROGRAM,
GRAPHICS_PROGRAM, SCROLL_FULL, SCROLL_LINE, SCROLL_PAGE, Screen,
add_window, compile_program, glfw_post_empty_event, init_cell_program,
init_cursor_program, set_clipboard_string, set_window_render_data,
update_window_title, update_window_visibility, viewport_for_window
)
from .keys import keyboard_mode_name
from .rgb import to_color
@@ -52,14 +51,19 @@ def calculate_gl_geometry(window_geometry, viewport_width, viewport_height, cell
return ScreenGeometry(xstart, ystart, window_geometry.xnum, window_geometry.ynum, dx, dy)
def load_shader_programs():
def load_shader_programs(semi_transparent=0):
v, f = load_shaders('cell')
compile_program(GRAPHICS_PROGRAM, *load_shaders('graphics'))
for which, p in {
'ALL': CELL_PROGRAM, 'BACKGROUND': CELL_BACKGROUND_PROGRAM, 'SPECIAL': CELL_SPECIAL_PROGRAM,
'FOREGROUND': CELL_FOREGROUND_PROGRAM
'SIMPLE': CELL_PROGRAM,
'BACKGROUND': CELL_BG_PROGRAM,
'SPECIAL': CELL_SPECIAL_PROGRAM,
'FOREGROUND': CELL_FG_PROGRAM,
}.items():
vv, ff = v.replace('WHICH_PROGRAM', which), f.replace('WHICH_PROGRAM', which)
if semi_transparent:
vv = vv.replace('#define NOT_TRANSPARENT', '#define TRANSPARENT')
ff = ff.replace('#define NOT_TRANSPARENT', '#define TRANSPARENT')
compile_program(p, vv, ff)
init_cell_program()
compile_program(CURSOR_PROGRAM, *load_shaders('cursor'))