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author | Thomas Martitz <kugel@rockbox.org> | 2011-03-05 19:57:56 +0000 |
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committer | Thomas Martitz <kugel@rockbox.org> | 2011-03-05 19:57:56 +0000 |
commit | 222e1ad84591f3aac29dac297924b16eb390f3e7 (patch) | |
tree | 496ec8ef13e1358daa8acaa26bec31403449a0c7 /firmware | |
parent | 29e84dff51c9a49ad5795b7b9a7f17373f9844b4 (diff) | |
download | rockbox-222e1ad84591f3aac29dac297924b16eb390f3e7.tar.gz rockbox-222e1ad84591f3aac29dac297924b16eb390f3e7.zip |
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')
-rw-r--r-- | firmware/drivers/lcd-16bit-vert.c | 258 |
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, |