LCD bitmap driver code consolidation from FS#4817:

Move text-drawing code into firmware-drivers/lcd-bitmap-common.c, included by the various driver files.
Add new static function LCDFN(putsxyofs_style) to draw styled text, and use it in both LCDFN(puts_style_offset) and LCDFN(scroll_fn).
Merge lcd_gradient_rect functions, with new function containing simplified code for drawing one line of a multi-line gradient.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22289 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 329 insertions, 0 deletions

diff --git a/firmware/drivers/lcd-bitmap-common.c b/firmware/drivers/lcd-bitmap-common.c
new file mode 100644
index 0000000000..c1efd9097e
--- /dev/null
+++ b/firmware/drivers/lcd-bitmap-common.c
@@ -0,0 +1,329 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Dave Chapman
+ *     Text rendering
+ * Copyright (C) 2006 Shachar Liberman
+ *     Offset text, scrolling
+ * Copyright (C) 2007 Nicolas Pennequin, Tom Ross, Ken Fazzone, Akio Idehara
+ *     Color gradient background
+ * Copyright (C) 2009 Andrew Mahone
+ *     Merged common LCD bitmap code
+ *
+ * Rockbox common bitmap LCD functions
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
+#define LCDFN(fn) lcd_ ## fn
+#define FBFN(fn)  fb_ ## fn
+#define LCDM(ma) LCD_ ## ma
+#define LCDNAME "lcd_"
+#define MAIN_LCD
+#endif
+
+#if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
+/* Fill a rectangle with a gradient */
+static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
+                              int num_lines, int cur_line)
+{
+    int old_pattern = current_vp->fg_pattern;
+    int step_mul;
+    if (h == 0) return;
+
+    num_lines *= h;
+    cur_line *= h;
+    step_mul = (1 << 16) / (num_lines);
+    int h_r = RGB_UNPACK_RED(current_vp->lss_pattern);
+    int h_g = RGB_UNPACK_GREEN(current_vp->lss_pattern);
+    int h_b = RGB_UNPACK_BLUE(current_vp->lss_pattern);
+    int rstep = (h_r - RGB_UNPACK_RED(current_vp->lse_pattern)) * step_mul;
+    int gstep = (h_g - RGB_UNPACK_GREEN(current_vp->lse_pattern)) * step_mul;
+    int bstep = (h_b - RGB_UNPACK_BLUE(current_vp->lse_pattern)) * step_mul;
+    h_r = (h_r << 16) + (1 << 15);
+    h_g = (h_g << 16) + (1 << 15);
+    h_b = (h_b << 16) + (1 << 15);
+    if (cur_line)
+    {
+        h_r -= cur_line * rstep;
+        h_g -= cur_line * gstep;
+        h_b -= cur_line * bstep;
+    }
+    unsigned     count;
+
+    for(count = 0; count < h; count++) {
+        current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
+        lcd_hline(x1, x2, y + count);
+        h_r -= rstep;
+        h_g -= gstep;
+        h_b -= bstep;
+    }
+
+    current_vp->fg_pattern = old_pattern;
+}
+#endif
+
+/* put a string at a given pixel position, skipping first ofs pixel columns */
+static void LCDFN(putsxyofs)(int x, int y, int ofs, const unsigned char *str)
+{
+    unsigned short ch;
+    unsigned short *ucs;
+    struct font* pf = font_get(current_vp->font);
+
+    ucs = bidi_l2v(str, 1);
+
+    while ((ch = *ucs++) != 0 && x < current_vp->width)
+    {
+        int width;
+        const unsigned char *bits;
+
+        /* get proportional width and glyph bits */
+        width = font_get_width(pf, ch);
+
+        if (ofs > width)
+        {
+            ofs -= width;
+            continue;
+        }
+
+        bits = font_get_bits(pf, ch);
+
+        LCDFN(mono_bitmap_part)(bits, ofs, 0, width, x, y, width - ofs,
+                                pf->height);
+
+        x += width - ofs;
+        ofs = 0;
+    }
+}
+/* put a string at a given pixel position */
+void LCDFN(putsxy)(int x, int y, const unsigned char *str)
+{
+    LCDFN(putsxyofs)(x, y, 0, str);
+}
+
+static void LCDFN(putsxyofs_style)(int xpos, int ypos,
+                                   const unsigned char *str, int style,
+                                   int w, int h, int offset)
+{
+    int lastmode = current_vp->drawmode;
+    int xrect = xpos + MAX(w - offset, 0);
+#if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
+    int oldfgcolor = current_vp->fg_pattern;
+    int oldbgcolor = current_vp->bg_pattern;
+    current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
+                                           DRMODE_INVERSEVID : 0);
+    if (style & STYLE_COLORED) {
+        if (current_vp->drawmode == DRMODE_SOLID)
+            current_vp->fg_pattern = style & STYLE_COLOR_MASK;
+        else
+            current_vp->bg_pattern = style & STYLE_COLOR_MASK;
+    }
+    current_vp->drawmode ^= DRMODE_INVERSEVID;
+    if (style & STYLE_GRADIENT) {
+        current_vp->drawmode = DRMODE_FG;
+        lcd_gradient_rect(xpos, current_vp->width, ypos, h,
+                          NUMLN_UNPACK(style), CURLN_UNPACK(style));
+        current_vp->fg_pattern = current_vp->lst_pattern;
+    }
+    else if (style & STYLE_COLORBAR) {
+        current_vp->drawmode = DRMODE_FG;
+        current_vp->fg_pattern = current_vp->lss_pattern;
+        lcd_fillrect(xpos, ypos, current_vp->width - xpos, h);
+        current_vp->fg_pattern = current_vp->lst_pattern;
+    }
+    else {
+        lcd_fillrect(xrect, ypos, current_vp->width - xrect, h);
+        current_vp->drawmode = (style & STYLE_INVERT) ?
+        (DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
+    }
+    lcd_putsxyofs(xpos, ypos, offset, str);
+    current_vp->fg_pattern = oldfgcolor;
+    current_vp->bg_pattern = oldbgcolor;
+#else
+    current_vp->drawmode = DRMODE_SOLID | ((style & STYLE_INVERT) ?
+                                           0 : DRMODE_INVERSEVID);
+    LCDFN(fillrect)(xrect, ypos, current_vp->width - xrect, h);
+    current_vp->drawmode ^= DRMODE_INVERSEVID;
+    LCDFN(putsxyofs)(xpos, ypos, offset, str);
+#endif
+    current_vp->drawmode = lastmode;
+}
+
+/*** Line oriented text output ***/
+
+/* put a string at a given char position */
+void LCDFN(puts_style_offset)(int x, int y, const unsigned char *str,
+                              int style, int offset)
+{
+    int xpos, ypos, w, h;
+    LCDFN(scroll_stop_line)(current_vp, y);
+    if(!str || !str[0])
+        return;
+    LCDFN(getstringsize)(str, &w, &h);
+    xpos = x * w / utf8length((char *)str);
+    ypos = y * h;
+    LCDFN(putsxyofs_style)(xpos, ypos, str, style, w, h, offset);
+}
+
+void LCDFN(puts)(int x, int y, const unsigned char *str)
+{
+    LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, 0);
+}
+
+void LCDFN(puts_style)(int x, int y, const unsigned char *str, int style)
+{
+    LCDFN(puts_style_offset)(x, y, str, style, 0);
+}
+
+void LCDFN(puts_offset)(int x, int y, const unsigned char *str, int offset)
+{
+    LCDFN(puts_style_offset)(x, y, str, STYLE_DEFAULT, offset);
+}
+
+/*** scrolling ***/
+
+void LCDFN(puts_scroll_style_offset)(int x, int y, const unsigned char *string,
+                                     int style, int offset)
+{
+    int w, h;
+
+    if ((unsigned)y >= (unsigned)current_vp->height)
+        return;
+
+    /* remove any previously scrolling line at the same location */
+    lcd_scroll_stop_line(current_vp, y);
+
+    if (LCDFN(scroll_info.lines) >= LCDM(SCROLLABLE_LINES)) return;
+    if (!string)
+        return;
+    LCDFN(puts_style_offset)(x, y, string, style, offset);
+
+    LCDFN(getstringsize)(string, &w, &h);
+
+    if (current_vp->width - x * 8 < w) {
+        /* prepare scroll line */
+        struct scrollinfo* s;
+        s = &LCDFN(scroll_info).scroll[LCDFN(scroll_info).lines];
+        s->start_tick = current_tick + LCDFN(scroll_info).delay;
+        s->style = style;
+
+        char *end;
+
+        memset(s->line, 0, sizeof s->line);
+        strcpy(s->line, string);
+
+        /* get width */
+        s->width = LCDFN(getstringsize)(s->line, &w, &h);
+
+        /* scroll bidirectional or forward only depending on the string
+           width */
+        if ( LCDFN(scroll_info).bidir_limit ) {
+            s->bidir = s->width < (current_vp->width) *
+                (100 + LCDFN(scroll_info).bidir_limit) / 100;
+        }
+        else
+            s->bidir = false;
+
+        if (!s->bidir) { /* add spaces if scrolling in the round */
+            strcat(s->line, "   ");
+            /* get new width incl. spaces */
+            s->width = LCDFN(getstringsize)(s->line, &w, &h);
+        }
+
+        end = strchr(s->line, '\0');
+        strlcpy(end, string, current_vp->width/2);
+
+        s->vp = current_vp;
+        s->y = y;
+        s->len = utf8length(string);
+        s->offset = offset;
+        s->startx = x * s->width / s->len;
+        s->backward = false;
+
+        LCDFN(scroll_info).lines++;
+    }
+}
+
+void LCDFN(puts_scroll)(int x, int y, const unsigned char *string)
+{
+    LCDFN(puts_scroll_style)(x, y, string, STYLE_DEFAULT);
+}
+
+void LCDFN(puts_scroll_style)(int x, int y, const unsigned char *string,
+                              int style)
+{
+     LCDFN(puts_scroll_style_offset)(x, y, string, style, 0);
+}
+
+void LCDFN(puts_scroll_offset)(int x, int y, const unsigned char *string,
+                               int offset)
+{
+     LCDFN(puts_scroll_style_offset)(x, y, string, STYLE_DEFAULT, offset);
+}
+
+void LCDFN(scroll_fn)(void)
+{
+    struct font* pf;
+    struct scrollinfo* s;
+    int index;
+    int xpos, ypos;
+    struct viewport* old_vp = current_vp;
+
+    for ( index = 0; index < LCDFN(scroll_info).lines; index++ ) {
+        s = &LCDFN(scroll_info).scroll[index];
+
+        /* check pause */
+        if (TIME_BEFORE(current_tick, s->start_tick))
+            continue;
+
+        LCDFN(set_viewport)(s->vp);
+
+        if (s->backward)
+            s->offset -= LCDFN(scroll_info).step;
+        else
+            s->offset += LCDFN(scroll_info).step;
+
+        pf = font_get(current_vp->font);
+        xpos = s->startx;
+        ypos = s->y * pf->height;
+
+        if (s->bidir) { /* scroll bidirectional */
+            if (s->offset <= 0) {
+                /* at beginning of line */
+                s->offset = 0;
+                s->backward = false;
+                s->start_tick = current_tick + LCDFN(scroll_info).delay * 2;
+            }
+            if (s->offset >= s->width - (current_vp->width - xpos)) {
+                /* at end of line */
+                s->offset = s->width - (current_vp->width - xpos);
+                s->backward = true;
+                s->start_tick = current_tick + LCDFN(scroll_info).delay * 2;
+            }
+        }
+        else {
+            /* scroll forward the whole time */
+            if (s->offset >= s->width)
+                s->offset %= s->width;
+        }
+        LCDFN(putsxyofs_style)(xpos, ypos, s->line, s->style, s->width,
+                               pf->height, s->offset);
+        LCDFN(update_viewport_rect)(xpos, ypos, current_vp->width - xpos,
+                                    pf->height);
+    }
+    LCDFN(set_viewport)(old_vp);
+}