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authorThomas Martitz <kugel@rockbox.org>2011-03-05 19:57:56 +0000
committerThomas Martitz <kugel@rockbox.org>2011-03-05 19:57:56 +0000
commit222e1ad84591f3aac29dac297924b16eb390f3e7 (patch)
tree496ec8ef13e1358daa8acaa26bec31403449a0c7 /firmware/drivers/lcd-16bit-vert.c
parent29e84dff51c9a49ad5795b7b9a7f17373f9844b4 (diff)
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Add lcd_alpha_bitmap_part suitable for vertical stride 16bit lcd.
Possibly not the fastest solution but it will do. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29525 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/drivers/lcd-16bit-vert.c')
-rw-r--r--firmware/drivers/lcd-16bit-vert.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/firmware/drivers/lcd-16bit-vert.c b/firmware/drivers/lcd-16bit-vert.c
index a2f47d3544..87a49e1249 100644
--- a/firmware/drivers/lcd-16bit-vert.c
+++ b/firmware/drivers/lcd-16bit-vert.c
@@ -910,6 +910,264 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig
lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
}
+/* draw alpha bitmap for anti-alias font */
+#define ALPHA_COLOR_FONT_DEPTH 2
+#define ALPHA_COLOR_LOOKUP_SHIFT (1 << ALPHA_COLOR_FONT_DEPTH)
+#define ALPHA_COLOR_LOOKUP_SIZE ((1 << ALPHA_COLOR_LOOKUP_SHIFT) - 1)
+#define ALPHA_COLOR_PIXEL_PER_BYTE (8 >> ALPHA_COLOR_FONT_DEPTH)
+#define ALPHA_COLOR_PIXEL_PER_WORD (32 >> ALPHA_COLOR_FONT_DEPTH)
+#ifdef CPU_ARM
+#define BLEND_INIT do {} while (0)
+#define BLEND_START(acc, color, alpha) \
+ asm volatile("mul %0, %1, %2" : "=&r" (acc) : "r" (color), "r" (alpha))
+#define BLEND_CONT(acc, color, alpha) \
+ asm volatile("mla %0, %1, %2, %0" : "+&r" (acc) : "r" (color), "r" (alpha))
+#define BLEND_OUT(acc) do {} while (0)
+#elif defined(CPU_COLDFIRE)
+#define ALPHA_BITMAP_READ_WORDS
+#define BLEND_INIT coldfire_set_macsr(EMAC_UNSIGNED)
+#define BLEND_START(acc, color, alpha) \
+ asm volatile("mac.l %0, %1, %%acc0" :: "%d" (color), "d" (alpha))
+#define BLEND_CONT BLEND_START
+#define BLEND_OUT(acc) asm volatile("movclr.l %%acc0, %0" : "=d" (acc))
+#else
+#define BLEND_INIT do {} while (0)
+#define BLEND_START(acc, color, alpha) ((acc) = (color) * (alpha))
+#define BLEND_CONT(acc, color, alpha) ((acc) += (color) * (alpha))
+#define BLEND_OUT(acc) do {} while (0)
+#endif
+
+/* Blend the given two colors */
+static inline unsigned blend_two_colors(unsigned c1, unsigned c2, unsigned a)
+{
+ a += a >> (ALPHA_COLOR_LOOKUP_SHIFT - 1);
+#if (LCD_PIXELFORMAT == RGB565SWAPPED)
+ c1 = swap16(c1);
+ c2 = swap16(c2);
+#endif
+ unsigned c1l = (c1 | (c1 << 16)) & 0x07e0f81f;
+ unsigned c2l = (c2 | (c2 << 16)) & 0x07e0f81f;
+ unsigned p;
+ BLEND_START(p, c1l, a);
+ BLEND_CONT(p, c2l, ALPHA_COLOR_LOOKUP_SIZE + 1 - a);
+ BLEND_OUT(p);
+ p = (p >> ALPHA_COLOR_LOOKUP_SHIFT) & 0x07e0f81f;
+ p |= (p >> 16);
+#if (LCD_PIXELFORMAT == RGB565SWAPPED)
+ return swap16(p);
+#else
+ return p;
+#endif
+}
+
+/* Blend the given color with the value from the alpha_color_lookup table */
+static inline unsigned blend_color(unsigned c, unsigned a)
+{
+ return blend_two_colors(c, current_vp->fg_pattern, a);
+}
+
+void ICODE_ATTR lcd_alpha_bitmap_part(const unsigned char *src, int src_x,
+ int src_y, int stride, int x, int y,
+ int width, int height)
+{
+ fb_data *dst, *dst_row, *backdrop;
+ unsigned dmask = 0x00000000;
+ int drmode = current_vp->drawmode;
+ /* nothing to draw? */
+ if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
+ (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
+ return;
+ /* initialize blending */
+ BLEND_INIT;
+
+ /* clipping */
+ if (x < 0)
+ {
+ width += x;
+ src_x -= x;
+ x = 0;
+ }
+ if (y < 0)
+ {
+ height += y;
+ src_y -= y;
+ y = 0;
+ }
+ if (x + width > current_vp->width)
+ width = current_vp->width - x;
+ if (y + height > current_vp->height)
+ height = current_vp->height - y;
+
+ if (drmode & DRMODE_INVERSEVID)
+ {
+ dmask = 0xffffffff;
+ drmode &= DRMODE_SOLID; /* mask out inversevid */
+ }
+ if (drmode == DRMODE_BG)
+ {
+ dmask = ~dmask;
+ }
+
+ dst_row = dst = LCDADDR(current_vp->x + x, current_vp->y + y);
+
+
+ int col, row = height;
+ unsigned data, pixels;
+ unsigned skip_end = (stride - width);
+ unsigned skip_start = src_y * stride + src_x;
+
+#ifdef ALPHA_BITMAP_READ_WORDS
+ uint32_t *src_w = (uint32_t *)((uintptr_t)src & ~3);
+ skip_start += ALPHA_COLOR_PIXEL_PER_BYTE * ((uintptr_t)src & 3);
+ src_w += skip_start / ALPHA_COLOR_PIXEL_PER_WORD;
+ data = letoh32(*src_w++) ^ dmask;
+ pixels = skip_start % ALPHA_COLOR_PIXEL_PER_WORD;
+#else
+ src += skip_start / ALPHA_COLOR_PIXEL_PER_BYTE;
+ data = *src ^ dmask;
+ pixels = skip_start % ALPHA_COLOR_PIXEL_PER_BYTE;
+#endif
+ data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
+#ifdef ALPHA_BITMAP_READ_WORDS
+ pixels = 8 - pixels;
+#endif
+
+ do
+ {
+ col = width;
+ dst = dst_row;
+ dst_row++;
+#ifdef ALPHA_BITMAP_READ_WORDS
+#define UPDATE_SRC_ALPHA do { \
+ if (--pixels) \
+ data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
+ else \
+ { \
+ data = letoh32(*src_w++) ^ dmask; \
+ pixels = ALPHA_COLOR_PIXEL_PER_WORD; \
+ } \
+ } while (0)
+#elif ALPHA_COLOR_PIXEL_PER_BYTE == 2
+#define UPDATE_SRC_ALPHA do { \
+ if (pixels ^= 1) \
+ data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
+ else \
+ data = *(++src) ^ dmask; \
+ } while (0)
+#else
+#define UPDATE_SRC_ALPHA do { \
+ if (pixels = (++pixels % ALPHA_COLOR_PIXEL_PER_BYTE)) \
+ data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
+ else \
+ data = *(++src) ^ dmask; \
+ } while (0)
+#endif
+ /* we don't want to have this in our inner
+ * loop and the codesize increase is minimal */
+ switch (drmode)
+ {
+ case DRMODE_COMPLEMENT:
+ do
+ {
+ *dst=blend_two_colors(*dst, ~(*dst),
+ data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ break;
+ case DRMODE_BG:
+ if(lcd_backdrop)
+ {
+ backdrop = (fb_data *)((long)dst+lcd_backdrop_offset);
+ do
+ {
+ *dst=blend_two_colors(*dst, *backdrop,
+ data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ backdrop += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ }
+ else
+ {
+ do
+ {
+ *dst=blend_two_colors(*dst, current_vp->bg_pattern,
+ data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ }
+ break;
+ case DRMODE_FG:
+ do
+ {
+ *dst=blend_color(*dst, data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ break;
+ case DRMODE_SOLID:
+ if(lcd_backdrop)
+ {
+ backdrop = (fb_data *)((long)dst+lcd_backdrop_offset);
+ do
+ {
+ *(dst)=blend_color(*backdrop,
+ data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ backdrop += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ }
+ else
+ {
+ do
+ {
+ *(dst)=blend_color(current_vp->bg_pattern,
+ data & ALPHA_COLOR_LOOKUP_SIZE );
+ dst += LCD_HEIGHT;
+ UPDATE_SRC_ALPHA;
+ }
+ while (--col);
+ }
+ break;
+ }
+#ifdef ALPHA_BITMAP_READ_WORDS
+ if (skip_end < pixels)
+ {
+ pixels -= skip_end;
+ data >>= skip_end * ALPHA_COLOR_LOOKUP_SHIFT;
+ } else {
+ pixels = skip_end - pixels;
+ src_w += pixels / ALPHA_COLOR_PIXEL_PER_WORD;
+ pixels %= ALPHA_COLOR_PIXEL_PER_WORD;
+ data = letoh32(*src_w++) ^ dmask;
+ data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
+ pixels = 8 - pixels;
+ }
+#else
+ if (skip_end)
+ {
+ pixels += skip_end;
+ if (pixels >= ALPHA_COLOR_PIXEL_PER_BYTE)
+ {
+ src += pixels / ALPHA_COLOR_PIXEL_PER_BYTE;
+ pixels %= ALPHA_COLOR_PIXEL_PER_BYTE;
+ data = *src ^ dmask;
+ data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
+ } else
+ data >>= skip_end * ALPHA_COLOR_LOOKUP_SHIFT;
+ }
+#endif
+ } while (--row);
+}
+
/* Draw a partial native bitmap */
void ICODE_ATTR lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width,