falsycat/glyphs-juke
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Improves text blending.

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This commit is contained in:
falsycat 2021-08-31 12:15:07 +09:00
parent 97bc604901
commit 82442ecf9d
1 changed files with 22 additions and 8 deletions
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28
src/Win32Console.cc
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@ -11,27 +11,41 @@ static void CalcChar(CHAR_INFO& c, float color, uint16_t text) {
BACKGROUND_INTENSITY | FOREGROUND_RED,
BACKGROUND_RED | FOREGROUND_INTENSITY,
};
constexpr uint8_t with_text_attrs[] = {
BACKGROUND_INTENSITY,
FOREGROUND_INTENSITY,
BACKGROUND_RED | FOREGROUND_INTENSITY,
BACKGROUND_INTENSITY | FOREGROUND_RED,
};
constexpr size_t char_expr_count = sizeof(chars)/sizeof(chars[0])-1;
constexpr size_t attr_expr_count = sizeof(attrs)/sizeof(attrs[0]);
constexpr size_t reso = char_expr_count*attr_expr_count;
/* post effect */
/* posteffect */
color = static_cast<float>(std::pow(color, 1.9));
/* clamps alpha */
int8_t a = static_cast<int8_t>(color*reso);
if (a >= reso) a = reso-1;
if (a < 0) a = 0;
/* calculates an index of attr from the alpha */
size_t ci = a%char_expr_count;
size_t ai = a/char_expr_count;
if (ai%2 == 1) ci = char_expr_count-ci-1;
/* assigns char and attr, but switches a set of attr depending on whether there's text */
c.Char.UnicodeChar = chars[ci];
c.Attributes = attrs[ai];
if (text) c.Char.UnicodeChar = text;
if (text) {
/* if color of this pixel is expressed by a thick char (ci is bigger),
* uses a attr set specialized in text to make it more visible. */
c.Attributes = ci < char_expr_count/3*2? attrs[ai]: with_text_attrs[ai];
c.Char.UnicodeChar = text;
} else {
c.Attributes = attrs[ai];
}
}
void gj::Win32Console::main() {
@ -44,6 +58,7 @@ void gj::Win32Console::main() {
ShowWindow(win_, TRUE);
}
/* throws away the cursor */
constexpr CONSOLE_CURSOR_INFO cursor{ 1, FALSE };
SetConsoleCursorInfo(screen_, &cursor);
@ -73,8 +88,6 @@ void gj::Win32Console::main() {
}
}
/* write output */
CHAR_INFO* c = chars_.get();
{ /* critical section */
@ -100,6 +113,7 @@ void gj::Win32Console::main() {
}
}
/* writes calculated pixels into the front buffer */
const COORD size = { static_cast<SHORT>(w_), static_cast<SHORT>(h_), };
const COORD pos = { 0, 0, };
SMALL_RECT rc = { 0, 0, static_cast<SHORT>(w_), static_cast<SHORT>(h_), };
@ -111,6 +125,6 @@ void gj::Win32Console::main() {
shown = false;
}
}
Sleep(30);
Sleep(10);
}
}