diff --git a/firmware/drivers/lcd-16bit-common.c b/firmware/drivers/lcd-16bit-common.c index 27e6c23885..af1171b401 100644 --- a/firmware/drivers/lcd-16bit-common.c +++ b/firmware/drivers/lcd-16bit-common.c @@ -336,7 +336,7 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig } -/* About Rockbox' internal alpha channel format (for ALPHA_COLOR_FONT_DEPTH == 2) +/* About Rockbox' internal alpha channel format (for ALPHA_BPP == 4) * * For each pixel, 4bit of alpha information is stored in a byte-stream, * so two pixels are packed into one byte. @@ -355,11 +355,15 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig * so lcd_bmp() do expect even rows. */ -#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) +#define ALPHA_BPP 4 +#define ALPHA_MASK ((1 << ALPHA_BPP) - 1) +#define ALPHA_PIXELS_PER_BYTE (CHAR_BIT / ALPHA_BPP) + +#define ALPHA_WORD_T uint32_t +#define ALPHA_WORD_LOAD load_le32 +#define ALPHA_WORDSIZE sizeof(ALPHA_WORD_T) +#define ALPHA_PIXELS_PER_WORD (ALPHA_WORDSIZE * CHAR_BIT / ALPHA_BPP) + #ifdef CPU_ARM #define BLEND_INIT do {} while (0) #define BLEND_FINISH do {} while(0) @@ -368,6 +372,7 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig #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 \ @@ -379,6 +384,7 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig 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_FINISH do {} while(0) @@ -390,7 +396,7 @@ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int heig /* Blend the given two colors */ static inline unsigned blend_two_colors(unsigned c1, unsigned c2, unsigned a) { - a += a >> (ALPHA_COLOR_LOOKUP_SHIFT - 1); + a += a >> (ALPHA_BPP - 1); #if (LCD_PIXELFORMAT == RGB565SWAPPED) c1 = swap16(c1); c2 = swap16(c2); @@ -399,9 +405,9 @@ static inline unsigned blend_two_colors(unsigned c1, unsigned c2, unsigned a) unsigned c2l = (c2 | (c2 << 16)) & 0x07e0f81f; unsigned p; BLEND_START(p, c1l, a); - BLEND_CONT(p, c2l, ALPHA_COLOR_LOOKUP_SIZE + 1 - a); + BLEND_CONT(p, c2l, ALPHA_MASK + 1 - a); BLEND_OUT(p); - p = (p >> ALPHA_COLOR_LOOKUP_SHIFT) & 0x07e0f81f; + p = (p >> ALPHA_BPP) & 0x07e0f81f; p |= (p >> 16); #if (LCD_PIXELFORMAT == RGB565SWAPPED) return swap16(p); @@ -410,251 +416,240 @@ static inline unsigned blend_two_colors(unsigned c1, unsigned c2, unsigned a) #endif } -/* Blend an image with an alpha channel - * if image is NULL, drawing will happen according to the drawmode - * src is the alpha channel (4bit per pixel) */ -static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image, - const unsigned char *src, int src_x, - int src_y, int x, int y, - int width, int height, - int stride_image, int stride_src) +static void ICODE_ATTR lcd_alpha_bitmap_part_mix( + const fb_data* image, const unsigned char *alpha, + int src_x, int src_y, + int x, int y, int width, int height, + int stride_image, int stride_alpha) { struct viewport *vp = lcd_current_viewport; - fb_data *dst, *dst_row; - unsigned dmask = 0x00000000; + unsigned int dmask = 0; int drmode = vp->drawmode; + fb_data *dst; +#ifdef ALPHA_BITMAP_READ_WORDS + ALPHA_WORD_T alpha_data, *alpha_word; + size_t alpha_offset = 0, alpha_pixels; +#else + unsigned char alpha_data; + size_t alpha_pixels; +#endif if (!clip_viewport_rect(vp, &x, &y, &width, &height, &src_x, &src_y)) return; - /* initialize blending */ - BLEND_INIT; - - /* the following drawmode combinations are possible: - * 1) COMPLEMENT: just negates the framebuffer contents - * 2) BG and BG+backdrop: draws _only_ background pixels with either - * the background color or the backdrop (if any). The backdrop - * is an image in native lcd format - * 3) FG and FG+image: draws _only_ foreground pixels with either - * the foreground color or an image buffer. The image is in - * native lcd format - * 4) SOLID, SOLID+backdrop, SOLID+image, SOLID+backdrop+image, i.e. all - * possible combinations of 2) and 3). Draws both, fore- and background, - * pixels. The rules of 2) and 3) apply. - * - * INVERSEVID swaps fore- and background pixels, i.e. background pixels - * become foreground ones and vice versa. - */ if (drmode & DRMODE_INVERSEVID) { - dmask = 0xffffffff; - drmode &= DRMODE_SOLID; /* mask out inversevid */ + dmask = 0xFFFFFFFFu; + drmode &= ~DRMODE_INVERSEVID; } - /* Use extra bits to avoid if () in the switch-cases below */ if (image != NULL) drmode |= DRMODE_INT_IMG; if ((drmode & DRMODE_BG) && lcd_backdrop) drmode |= DRMODE_INT_BD; - dst_row = FBADDR(x, y); - - int col, row = height; - unsigned data, pixels; - unsigned skip_end = (stride_src - width); - unsigned skip_start = src_y * stride_src + src_x; - unsigned skip_start_image = STRIDE_MAIN(src_y * stride_image + src_x, - src_x * stride_image + src_y); - #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; +#define INIT_ALPHA() \ + do { \ + alpha_offset = src_y * stride_alpha + src_x; \ + } while(0) +#define START_ALPHA() \ + do { \ + size_t __byteskip = (uintptr_t)alpha % ALPHA_WORDSIZE; \ + size_t __byteoff = alpha_offset / ALPHA_PIXELS_PER_BYTE; \ + alpha_word = (ALPHA_WORD_T *)ALIGN_DOWN(alpha + __byteoff, ALPHA_WORDSIZE); \ + alpha_data = ALPHA_WORD_LOAD(alpha_word++) ^ dmask; \ + alpha_pixels = ((__byteoff + __byteskip) % ALPHA_WORDSIZE) * ALPHA_PIXELS_PER_BYTE; \ + alpha_pixels += alpha_offset % ALPHA_PIXELS_PER_BYTE; \ + alpha_data >>= alpha_pixels * ALPHA_BPP; \ + alpha_pixels = ALPHA_PIXELS_PER_WORD - alpha_pixels; \ + } while(0) +#define END_ALPHA() \ + do { \ + alpha_offset += stride_alpha; \ + } while(0) +#define READ_ALPHA() \ + ({ \ + if (alpha_pixels == 0) { \ + alpha_data = ALPHA_WORD_LOAD(alpha_word++) ^ dmask; \ + alpha_pixels = ALPHA_PIXELS_PER_WORD; \ + } \ + ALPHA_WORD_T __ret = alpha_data & ALPHA_MASK; \ + alpha_data >>= ALPHA_BPP; \ + alpha_pixels--; \ + __ret; \ + }) +#elif ALPHA_BPP == 4 +#define INIT_ALPHA() \ + do { \ + alpha_pixels = src_y * stride_alpha + src_x; \ + stride_alpha = stride_alpha - width; \ + alpha += alpha_pixels / ALPHA_PIXELS_PER_BYTE; \ + alpha_pixels &= 1; \ + if (alpha_pixels) { \ + alpha_data = *alpha++ ^ dmask; \ + alpha_data >>= ALPHA_BPP; \ + } \ + } while(0) +#define START_ALPHA() do { } while(0) +#define END_ALPHA() \ + do { \ + if (stride_alpha) { \ + alpha_pixels = stride_alpha - alpha_pixels; \ + alpha += alpha_pixels / ALPHA_PIXELS_PER_BYTE; \ + alpha_data = *alpha++ ^ dmask; \ + alpha_pixels &= 1; \ + if (alpha_pixels) \ + alpha_data >>= ALPHA_BPP; \ + } \ + } while(0) +#define READ_ALPHA() \ + ({ \ + if (alpha_pixels == 0) \ + alpha_data = *alpha++ ^ dmask; \ + unsigned char __ret = alpha_data & ALPHA_MASK; \ + alpha_data >>= ALPHA_BPP; \ + alpha_pixels ^= 1; \ + __ret; \ + }) #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; +#define INIT_ALPHA() \ + do { \ + alpha_pixels = src_y * stride_alpha + src_x; \ + stride_alpha = stride_alpha - width; \ + alpha += alpha_pixels / ALPHA_PIXELS_PER_BYTE; \ + alpha_data = *alpha++ ^ dmask; \ + alpha_pixels %= ALPHA_PIXELS_PER_BYTE; \ + alpha_data >>= ALPHA_BPP * alpha_pixels; \ + alpha_pixels = ALPHA_PIXELS_PER_BYTE - alpha_pixels; \ + } while(0) +#define START_ALPHA() do { } while(0) +#define END_ALPHA() \ + do { \ + if ((size_t)stride_alpha <= alpha_pixels) \ + alpha_pixels -= stride_alpha; \ + else { \ + alpha_pixels = stride_alpha - alpha_pixels; \ + alpha += alpha_pixels / ALPHA_PIXELS_PER_BYTE; \ + alpha_data = *alpha++ ^ dmask; \ + alpha_pixels %= ALPHA_PIXELS_PER_BYTE; \ + alpha_data >>= ALPHA_BPP * alpha_pixels; \ + alpha_pixels = ALPHA_PIXELS_PER_BYTE - alpha_pixels; \ + } \ + } while(0) +#define READ_ALPHA() \ + ({ \ + if (alpha_pixels == 0) { \ + alpha_data = *alpha++ ^ dmask; \ + alpha_pixels = ALPHA_PIXELS_PER_BYTE; \ + } \ + unsigned char __ret = alpha_data & ALPHA_MASK; \ + alpha_data >>= ALPHA_BPP; \ + alpha_pixels--; \ + __ret; \ + }) #endif - /* image is only accessed in DRMODE_INT_IMG cases, i.e. when non-NULL. - * Therefore NULL accesses are impossible and we can increment - * unconditionally (applies for stride at the end of the loop as well) */ - image += skip_start_image; - /* go through the rows and update each pixel */ + dst = FBADDR(x, y); + image += STRIDE_MAIN(src_y * stride_image + src_x, + src_x * stride_image + src_y); + + INIT_ALPHA(); + BLEND_INIT; + do { - /* saving lcd_current_viewport->fg/bg_pattern and lcd_backdrop_offset into these - * temp vars just before the loop helps gcc to opimize the loop better - * (testing showed ~15% speedup) */ - unsigned fg, bg; - ptrdiff_t bo, img_offset; - col = width; - dst = dst_row; - dst_row += ROW_INC; -#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 + intptr_t bo, io; + unsigned int fg, bg; + int col = width; + fb_data *dst_row = dst; + + START_ALPHA(); switch (drmode) { - case DRMODE_COMPLEMENT: - do - { - *dst = blend_two_colors(*dst, ~(*dst), - data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_BG|DRMODE_INT_BD: - bo = lcd_backdrop_offset; - do - { - fb_data c = *(fb_data *)((uintptr_t)dst + bo); - *dst = blend_two_colors(c, *dst, data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - image += STRIDE_MAIN(1, stride_image); - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_BG: - bg = vp->bg_pattern; - do - { - *dst = blend_two_colors(bg, *dst, data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_FG|DRMODE_INT_IMG: - img_offset = image - dst; - do - { - *dst = blend_two_colors(*dst, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_FG: - fg = vp->fg_pattern; - do - { - *dst = blend_two_colors(*dst, fg, data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_SOLID|DRMODE_INT_BD: - bo = lcd_backdrop_offset; - fg = vp->fg_pattern; - do - { - fb_data *c = (fb_data *)((uintptr_t)dst + bo); - *dst = blend_two_colors(*c, fg, data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_SOLID|DRMODE_INT_IMG: - bg = vp->bg_pattern; - img_offset = image - dst; - do - { - *dst = blend_two_colors(bg, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_SOLID|DRMODE_INT_BD|DRMODE_INT_IMG: - bo = lcd_backdrop_offset; - img_offset = image - dst; - do - { - fb_data *c = (fb_data *)((uintptr_t)dst + bo); - *dst = blend_two_colors(*c, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - UPDATE_SRC_ALPHA; - } - while (--col); - break; - case DRMODE_SOLID: - bg = vp->bg_pattern; - fg = vp->fg_pattern; - do - { - *dst = blend_two_colors(bg, fg, data & ALPHA_COLOR_LOOKUP_SIZE ); - dst += COL_INC; - 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) + case DRMODE_COMPLEMENT: + do { - 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; + *dst = blend_two_colors(*dst, ~(*dst), READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_BG|DRMODE_INT_BD: + bo = lcd_backdrop_offset; + do + { + *dst = blend_two_colors(*PTR_ADD(dst, bo), *dst, READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_BG: + bg = vp->bg_pattern; + do + { + *dst = blend_two_colors(bg, *dst, READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_FG|DRMODE_INT_IMG: + io = image - dst; + do + { + *dst = blend_two_colors(*dst, *(dst + io), READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_FG: + fg = vp->fg_pattern; + do + { + *dst = blend_two_colors(*dst, fg, READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_SOLID|DRMODE_INT_BD: + fg = vp->fg_pattern; + bo = lcd_backdrop_offset; + do + { + *dst = blend_two_colors(*PTR_ADD(dst, bo), fg, READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_SOLID|DRMODE_INT_IMG: + bg = vp->bg_pattern; + io = image - dst; + do + { + *dst = blend_two_colors(bg, *(dst + io), READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_SOLID|DRMODE_INT_BD|DRMODE_INT_IMG: + bo = lcd_backdrop_offset; + io = image - dst; + do + { + *dst = blend_two_colors(*PTR_ADD(dst, bo), *(dst + io), READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; + case DRMODE_SOLID: + fg = vp->fg_pattern; + bg = vp->bg_pattern; + do + { + *dst = blend_two_colors(bg, fg, READ_ALPHA()); + dst += COL_INC; + } while (--col); + break; } -#endif - image += STRIDE_MAIN(stride_image,1); - } while (--row); + END_ALPHA(); + image += STRIDE_MAIN(stride_image, 1); + dst = dst_row + ROW_INC; + } while (--height); BLEND_FINISH; }