/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 by Dave Chapman * * Rockbox driver for 16-bit colour LCDs * * 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. * ****************************************************************************/ /* to be #included by lcd-16bit*.c */ #if !defined(ROW_INC) || !defined(COL_INC) #error ROW_INC or COL_INC not defined #endif /* Clear the current viewport */ void lcd_clear_viewport(void) { fb_data *dst, *dst_end; int x, y, width, height; int len, step; x = current_vp->x; y = current_vp->y; width = current_vp->width; height = current_vp->height; #if defined(HAVE_VIEWPORT_CLIP) /********************* Viewport on screen clipping ********************/ /* nothing to draw? */ if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0)) return; /* clip image in viewport in screen */ if (x < 0) { width += x; x = 0; } if (y < 0) { height += y; y = 0; } if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; #endif len = STRIDE_MAIN(width, height); step = STRIDE_MAIN(ROW_INC, COL_INC); dst = FBADDR(x, y); dst_end = FBADDR(x + width - 1 , y + height - 1); if (current_vp->drawmode & DRMODE_INVERSEVID) { do { memset16(dst, current_vp->fg_pattern, len); dst += step; } while (dst <= dst_end); } else { if (!lcd_backdrop) { do { memset16(dst, current_vp->bg_pattern, len); dst += step; } while (dst <= dst_end); } else { do { memcpy(dst, PTR_ADD(dst, lcd_backdrop_offset), len * sizeof(fb_data)); dst += step; } while (dst <= dst_end); } } if (current_vp == &default_vp) lcd_scroll_stop(); else lcd_scroll_stop_viewport(current_vp); } /*** low-level drawing functions ***/ static void ICODE_ATTR setpixel(fb_data *address) { *address = current_vp->fg_pattern; } static void ICODE_ATTR clearpixel(fb_data *address) { *address = current_vp->bg_pattern; } static void ICODE_ATTR clearimgpixel(fb_data *address) { *address = *PTR_ADD(address, lcd_backdrop_offset); } static void ICODE_ATTR flippixel(fb_data *address) { *address = ~(*address); } static void ICODE_ATTR nopixel(fb_data *address) { (void)address; } lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[8] = { flippixel, nopixel, setpixel, setpixel, nopixel, clearpixel, nopixel, clearpixel }; lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[8] = { flippixel, nopixel, setpixel, setpixel, nopixel, clearimgpixel, nopixel, clearimgpixel }; lcd_fastpixelfunc_type* const * lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor; /* Fill a rectangular area */ void lcd_fillrect(int x, int y, int width, int height) { unsigned bits = 0; enum fill_opt fillopt = OPT_NONE; fb_data *dst, *dst_end; int len, step; /******************** In viewport clipping **********************/ /* nothing to draw? */ if ((width <= 0) || (height <= 0) || (x >= current_vp->width) || (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0)) return; if (x < 0) { width += x; x = 0; } if (y < 0) { height += 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; /* adjust for viewport */ x += current_vp->x; y += current_vp->y; #if defined(HAVE_VIEWPORT_CLIP) /********************* Viewport on screen clipping ********************/ /* nothing to draw? */ if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0)) return; /* clip image in viewport in screen */ if (x < 0) { width += x; x = 0; } if (y < 0) { height += y; y = 0; } if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; #endif /* drawmode and optimisation */ if (current_vp->drawmode & DRMODE_INVERSEVID) { if (current_vp->drawmode & DRMODE_BG) { if (!lcd_backdrop) { fillopt = OPT_SET; bits = current_vp->bg_pattern; } else fillopt = OPT_COPY; } } else { if (current_vp->drawmode & DRMODE_FG) { fillopt = OPT_SET; bits = current_vp->fg_pattern; } } if (fillopt == OPT_NONE && current_vp->drawmode != DRMODE_COMPLEMENT) return; dst = FBADDR(x, y); dst_end = FBADDR(x + width - 1, y + height - 1); len = STRIDE_MAIN(width, height); step = STRIDE_MAIN(ROW_INC, COL_INC); do { switch (fillopt) { case OPT_SET: memset16(dst, bits, len); break; case OPT_COPY: memcpy(dst, PTR_ADD(dst, lcd_backdrop_offset), len * sizeof(fb_data)); break; case OPT_NONE: /* DRMODE_COMPLEMENT */ { fb_data *start = dst; fb_data *end = start + len; do *start = ~(*start); while (++start < end); break; } } dst += step; } while (dst <= dst_end); } /* About Rockbox' internal monochrome bitmap format: * * A bitmap contains one bit for every pixel that defines if that pixel is * black (1) or white (0). Bits within a byte are arranged vertically, LSB * at top. * The bytes are stored in row-major order, with byte 0 being top left, * byte 1 2nd from left etc. The first row of bytes defines pixel rows * 0..7, the second row defines pixel row 8..15 etc. * * This is the mono bitmap format used on all other targets so far; the * pixel packing doesn't really matter on a 8bit+ target. */ /* Draw a partial monochrome bitmap */ void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x, int src_y, int stride, int x, int y, int width, int height) { const unsigned char *src_end; fb_data *dst, *dst_col; unsigned dmask = 0x100; /* bit 8 == sentinel */ int drmode = current_vp->drawmode; int row; /******************** Image in viewport clipping **********************/ /* nothing to draw? */ if ((width <= 0) || (height <= 0) || (x >= current_vp->width) || (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0)) return; 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; /* adjust for viewport */ x += current_vp->x; y += current_vp->y; #if defined(HAVE_VIEWPORT_CLIP) /********************* Viewport on screen clipping ********************/ /* nothing to draw? */ if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0)) return; /* clip image in viewport in screen */ if (x < 0) { width += x; src_x -= x; x = 0; } if (y < 0) { height += y; src_y -= y; y = 0; } if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; #endif src += stride * (src_y >> 3) + src_x; /* move starting point */ src_y &= 7; src_end = src + width; dst_col = FBADDR(x, y); if (drmode & DRMODE_INVERSEVID) { dmask = 0x1ff; /* bit 8 == sentinel */ drmode &= DRMODE_SOLID; /* mask out inversevid */ } /* Use extra bit to avoid if () in the switch-cases below */ if ((drmode & DRMODE_BG) && lcd_backdrop) drmode |= DRMODE_INT_BD; /* go through each column and update each pixel */ do { const unsigned char *src_col = src++; unsigned data = (*src_col ^ dmask) >> src_y; int fg, bg; uintptr_t bo; dst = dst_col; dst_col += COL_INC; row = height; #define UPDATE_SRC do { \ data >>= 1; \ if (data == 0x001) { \ src_col += stride; \ data = *src_col ^ dmask; \ } \ } while (0) switch (drmode) { case DRMODE_COMPLEMENT: do { if (data & 0x01) *dst = ~(*dst); dst += ROW_INC; UPDATE_SRC; } while (--row); break; case DRMODE_BG|DRMODE_INT_BD: bo = lcd_backdrop_offset; do { if (!(data & 0x01)) *dst = *PTR_ADD(dst, bo); dst += ROW_INC; UPDATE_SRC; } while (--row); break; case DRMODE_BG: bg = current_vp->bg_pattern; do { if (!(data & 0x01)) *dst = bg; dst += ROW_INC; UPDATE_SRC; } while (--row); break; case DRMODE_FG: fg = current_vp->fg_pattern; do { if (data & 0x01) *dst = fg; dst += ROW_INC; UPDATE_SRC; } while (--row); break; case DRMODE_SOLID|DRMODE_INT_BD: fg = current_vp->fg_pattern; bo = lcd_backdrop_offset; do { *dst = (data & 0x01) ? fg : *PTR_ADD(dst, bo); dst += ROW_INC; UPDATE_SRC; } while (--row); break; case DRMODE_SOLID: fg = current_vp->fg_pattern; bg = current_vp->bg_pattern; do { *dst = (data & 0x01) ? fg : bg; dst += ROW_INC; UPDATE_SRC; } while (--row); break; } } while (src < src_end); } /* Draw a full monochrome bitmap */ void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int height) { lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height); } /* About Rockbox' internal alpha channel format (for ALPHA_COLOR_FONT_DEPTH == 2) * * For each pixel, 4bit of alpha information is stored in a byte-stream, * so two pixels are packed into one byte. * The lower nibble is the first pixel, the upper one the second. The stride is * horizontal. E.g row0: pixel0: byte0[0:3], pixel1: byte0[4:7], pixel2: byte1[0:3],... * The format is independant of the internal display orientation and color * representation, as to support the same font files on all displays. * The values go linear from 0 (fully opaque) to 15 (fully transparent) * (note how this is the opposite of the alpha channel in the ARGB format). * * This might suggest that rows need to have an even number of pixels. * However this is generally not the case. lcd_alpha_bitmap_part_mix() can deal * with uneven colums (i.e. two rows can share one byte). And font files do * exploit this. * However, this is difficult to do for image files, especially bottom-up bitmaps, * 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) #ifdef CPU_ARM #define BLEND_INIT do {} while (0) #define BLEND_FINISH 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 \ unsigned long _macsr = coldfire_get_macsr(); \ coldfire_set_macsr(EMAC_UNSIGNED) #define BLEND_FINISH \ coldfire_set_macsr(_macsr) #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_FINISH 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 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) { fb_data *dst, *dst_row; 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; /* adjust for viewport */ x += current_vp->x; y += current_vp->y; #if defined(HAVE_VIEWPORT_CLIP) /********************* Viewport on screen clipping ********************/ /* nothing to draw? */ if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT) || (x + width <= 0) || (y + height <= 0)) { BLEND_FINISH; return; } /* clip image in viewport in screen */ if (x < 0) { width += x; src_x -= x; x = 0; } if (y < 0) { height += y; src_y -= y; y = 0; } if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; #endif /* 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 */ } /* 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; #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 /* 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 */ do { /* saving current_vp->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 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 = current_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 = current_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 = current_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 = current_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 = current_vp->bg_pattern; fg = current_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) { 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 image += STRIDE_MAIN(stride_image,1); } while (--row); BLEND_FINISH; }