Root/fbterm/patches/002-fbterm-1.7-benlcd.patch

1Patch to get the fbterm 1.7 display somewhat better the gliphs on the Ben LCD.
2
3Author: Lluís Batlle i Rossell
4
5diff --git a/src/screen_render.cpp b/src/screen_render.cpp
6index e8f39b8..e0f90e9 100644
7--- a/src/screen_render.cpp
8+++ b/src/screen_render.cpp
9@@ -195,7 +195,40 @@ void Screen::draw##bits(u32 x, u32 y, u32 w, u8 fc, u8 bc, u8 *pixmap) \
10 
11 drawX(15, 5, 5, 5, u16, writew)
12 drawX(16, 5, 6, 5, u16, writew)
13-drawX(32, 8, 8, 8, u32, writel)
14+
15+void Screen::draw32(u32 x, u32 y, u32 w, u8 fc, u8 bc, u8 *pixmap)
16+{
17+ /* This code takes into account the Ben Nanonote LCD, that has the distribution:
18+ * 0: RR GG BB RR GG BB
19+ * 1: GG BB RR GG BB RR
20+ * 2: RR GG BB RR GG BB
21+ * 3: ...
22+ *
23+ * We display the odd rows as 50% green in the current pixel, 50% in the next */
24+ u8 red, green, blue;
25+ u8 pixel;
26+ u32 color;
27+ u32 *dst = (u32 *)(mVMemBase + y * mBytesPerLine + x * bytes_per_pixel);
28+ /* To work with white background, we ensure to paint the first pixel */
29+ u8 prevgreen = mPalette[bc].green/2;
30+
31+ for (; w--; pixmap++, dst++) {
32+ u8 newgreen;
33+ pixel = *pixmap;
34+
35+ red = mPalette[bc].red + (((mPalette[fc].red - mPalette[bc].red) * pixel) >> 8);
36+ newgreen = mPalette[bc].green + (((mPalette[fc].green - mPalette[bc].green) * pixel) >> 8);
37+ blue = mPalette[bc].blue + (((mPalette[fc].blue - mPalette[bc].blue) * pixel) >> 8);
38+
39+ /* width == 0 is the special case for the last byte, where we paint full green.
40+ * That's relevant for white background, like when running 'top'. */
41+ green = ((y & 1) == 0 || w == 0) ? newgreen : (newgreen/2 + prevgreen);
42+ color = (red << 16) | (green << 8) | (blue);
43+ writel(dst, color);
44+ prevgreen = newgreen/2;
45+ }
46+}
47+
48 
49 #define drawXBg(bits, lred, lgreen, lblue, type, fbwrite) \
50  \
51

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