High contrast BW skin

/*
 This project is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 Deviation is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with Deviation.  If not, see <http://www.gnu.org/licenses/>.
 */

#define TRANSPARENT_BARGRAPH
#define TRIM_THICKNESS 10
#define TRIM_MARGIN 1
u32 _bargraph_get_color(s32 val, struct guiBarGraph *graph, struct disp_bargraph *disp)
{
    s32 center = (graph->max + graph->min) / 2;
    return val > center
           ? disp->fg_color_pos
           : val < center
             ? disp->fg_color_neg
             : disp->fg_color_zero;
}
void _bargraph_trim_horizontal(int x, int y, int width, int height, s32 val, u32 color,
        struct guiBarGraph *graph, struct disp_bargraph *disp, struct guiBox *box)
{
    (void)box;
    if (Display.flags & TRIM_TRANSPARENT) {
        GUI_DrawBackground(x, y, width, height);
    } else {
        LCD_FillRect(x, y, width, height, disp->bg_color);
    }
    LCD_DrawFastVLine(x + width / 2, y, height, disp->outline_color); //Center
    if (val == 0) {
        // rectangle
        val = (TRIM_THICKNESS / 2) + (width - TRIM_THICKNESS) * (val - graph->min) / (graph->max - graph->min);
        s16 xpos = graph->direction == TRIM_HORIZONTAL ? x + val : x + width - val;
        LCD_FillRect(xpos - TRIM_THICKNESS / 2,
                 y + TRIM_MARGIN,
                 TRIM_THICKNESS, height - TRIM_MARGIN * 2, color);
    } else {
        // arrow
        s16 newval = val * (width - 2* TRIM_THICKNESS) / (graph->max - graph->min);
        int i, t;
        for (i=0; i<TRIM_THICKNESS; i++) {
                t = ((TRIM_THICKNESS - i) * height) / TRIM_THICKNESS;
                LCD_DrawFastVLine(x + width/2 - newval + ( val<0 ? i : -i), y + (height - t)/2, t, color);
        }
    }
}
void _bargraph_trim_vertical(int x, int y, int width, int height, s32 val, u32 color,
        struct guiBarGraph *graph, struct disp_bargraph *disp, struct guiBox *box)
{
    (void)box;
    if (Display.flags & TRIM_TRANSPARENT) {
        GUI_DrawBackground(x, y, width, height);
    } else {
        LCD_FillRect(x, y, width, height, disp->bg_color);
    }
    LCD_DrawFastHLine(x, y + height / 2, width, disp->outline_color); //Center
    if (val == 0) {
        // rectangle
        s16 ypos = (TRIM_THICKNESS / 2) + (height - TRIM_THICKNESS) * (val - graph->min) / (graph->max - graph->min);
        LCD_FillRect(x + TRIM_MARGIN,
                        y + (height - ypos) - TRIM_THICKNESS / 2,
                        width - TRIM_MARGIN * 2, TRIM_THICKNESS, color);
    } else {
        // arrow
        s16 newval = val * (height - 2* TRIM_THICKNESS) / (graph->max - graph->min);
        int i, t;
        for (i=0; i<TRIM_THICKNESS; i++) {
                t = ((TRIM_THICKNESS - i) * width) / TRIM_THICKNESS;
                LCD_DrawFastHLine(x + (width - t)/2, y + height/2 - newval + ( val<0 ? i : -i), t, color);
        }
    }
}