My code was uploaded.
https://github.com/kusumotonorio/factor/blob/win-transparent-background-text/basis/windows/uniscribe/uniscribe.factor
I want to know how slow the code when it draws transparent background
texts. So I am writing
a test app to know it. But it has an issue.
I try to measure time by actually drawing a label with a transparent
background over and over again, and that happens very quickly.
Creating an image from text takes a long time (3: and 4:) , so it should
actually take longer.
What's wrong with my code?
! Copyright (C) 2019 KUSUMOTO Norio.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel accessors locals math formatting ui ui.gadgets.labels
ui.commands ui.gadgets ui.gadgets.toolbar ui.gadgets.tracks ui.gestures
fonts colors tools.time memory math.ranges namespaces arrays sequences
windows.uniscribe windows.uniscribe.private ;
IN: uni-bench
TUPLE: uni-bench-gadget < track
opaque-label
transparent-label
opaque-time
transparent-time ;
SYMBOL: test-strings
V{ } clone test-strings set-global
1 5000 [a,b] [
"%04d" sprintf test-strings get push
] each
test-strings get >array test-strings set-global
: <uni-bench-gadget> ( -- gadget )
vertical uni-bench-gadget new-track
{
" Press any of the keys listed below"
""
" 1: Opaque background label (5000 times)"
" 2: Transparent background label (5000 times)"
" 3: Opaque script-string>image (5000 times)"
" 4: Transparent script-string>image (5000 times)"
""
} <label> f track-add
"0000" <label> >>opaque-label
"0000" <label> >>transparent-label
"" <label> >>opaque-time
"" <label> >>transparent-time
dup opaque-label>>
<font>
"monospace" >>name
T{ rgba f 0.0 0.0 0.0 1.0 } >>foreground
T{ rgba f 0.0 0.0 1.0 1.0 } >>background
36 >>size
>>font f track-add
dup transparent-label>>
<font>
"monospace" >>name
T{ rgba f 0.0 0.0 0.0 1.0 } >>foreground
T{ rgba f 0.0 0.0 1.0 0.0 } >>background
36 >>size
>>font f track-add
dup opaque-time>> " Opaque:" label-on-left f track-add
dup transparent-time>> " Transparent:" label-on-left f track-add ;
:: com-benchmark-opaque ( gadget -- )
gadget opaque-label>> :> test-label
gc
[
test-strings get-global [
test-label swap >>text relayout-1
] each
] benchmark
gadget opaque-time>>
swap 1000000 / "%d ms" sprintf >>text relayout-1 ;
:: com-benchmark-transparent ( gadget -- )
gadget transparent-label>> :> test-label
gc
[
test-strings get-global [
test-label swap >>text relayout-1
] each
] benchmark
gadget transparent-time>>
swap 1000000 / "%d ms" sprintf >>text relayout-1 ;
:: com-benchmark-opaque-script-string>image ( gadget -- )
gadget opaque-label>> font>> :> test-font
gc
[
test-strings get-global [
test-font swap <script-string> script-string>image drop
] each
] benchmark
gadget opaque-time>>
swap 1000000 / "%d ms" sprintf >>text relayout-1 ;
:: com-benchmark-transparent-script-string>image ( gadget -- )
gadget transparent-label>> font>> :> test-font
gc
[
test-strings get-global [
test-font swap <script-string> script-string>image drop
] each
] benchmark
gadget transparent-time>>
swap 1000000 / "%d ms" sprintf >>text relayout-1 ;
uni-bench-gadget "gestures" f {
{ T{ key-down { sym "1" } } com-benchmark-opaque }
{ T{ key-down { sym "2" } } com-benchmark-transparent }
{ T{ key-down { sym "3" } } com-benchmark-opaque-script-string>image }
{ T{ key-down { sym "4" } }
com-benchmark-transparent-script-string>image }
} define-command-map
M: uni-bench-gadget pref-dim* drop { 300 250 } ;
MAIN-WINDOW: uni-bench { { title "Uniscribe benchmark" } }
<uni-bench-gadget> >>gadgets ;
On 2019/05/30 21:17, KUSUMOTO Norio wrote:
Thank you, Alexander! I will read it and study. I tried the idea I
wrote earlier. I've only tried a little, but it seems to work well.
Yay! <https://pbs.twimg.com/media/D70GEGkVUAUxgWb.png> -- KUSUMOTO Norio
2019/05/30 20:19、Alexander Ilin <ajs...@yandex.ru>のメール: Hello! I
think I have figured out the algorithm for the image processing. I'm
not sure if it's the same one that you came up with.
https://github.com/factor/factor/issues/152#issuecomment-497292323
Also, I don't know if there are standard WinApi functions to perform
the necessary operation, namely copying a color channel into the
alpha channel, but I suspect there might be, in which case we won't
lose performance there. 30.05.2019, 03:50, "KUSUMOTO Norio"
<kusum...@na.rim.or.jp>:
Although it seems that to transfer the appropriate data to the
device context is the 'right' solution, I have a hunch that it will
be a difficult task. So I am beginning to think that we should take
another, a cheat, approach. It's like a chroma key. Uniscribe draws
text with a color background instead of transparency, and a word
replaces the color with transparency when converting from the bitmap
to an Factor's image. It may be slow, but we don't have many chances
to draw characters on a transparent background. And for example, on
a button label, once Factor creates an image with such characters,
Factor use the image again, so I think there are few problems. This
approach can localize changes. I can't define the word for image
conversion to do such a special action, but I think that it's not a
difficult task for someone familiar with image processing words.
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