| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2007 by Will Robertson |
| * |
| * 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. |
| * |
| ****************************************************************************/ |
| |
| #include "config.h" |
| #include "cpu.h" |
| #include "string.h" |
| #include "lcd.h" |
| #include "kernel.h" |
| #include "lcd-target.h" |
| |
| #define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)]) |
| |
| static volatile bool lcd_on = true; |
| volatile bool lcd_poweroff = false; |
| static unsigned lcd_yuv_options = 0; |
| /* |
| ** This is imported from lcd-16bit.c |
| */ |
| extern struct viewport* current_vp; |
| |
| /* Copies a rectangle from one framebuffer to another. Can be used in |
| single transfer mode with width = num pixels, and height = 1 which |
| allows a full-width rectangle to be copied more efficiently. */ |
| extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src, |
| int width, int height); |
| |
| #if 0 |
| bool lcd_enabled() |
| { |
| return lcd_on; |
| } |
| #endif |
| |
| /* LCD init */ |
| void lcd_init_device(void) |
| { |
| } |
| |
| /* Update a fraction of the display. */ |
| void lcd_update_rect(int x, int y, int width, int height) |
| { |
| fb_data *dst, *src; |
| |
| if (!lcd_on) |
| return; |
| |
| if (x + width > LCD_WIDTH) |
| width = LCD_WIDTH - x; /* Clip right */ |
| if (x < 0) |
| width += x, x = 0; /* Clip left */ |
| if (width <= 0) |
| return; /* nothing left to do */ |
| |
| if (y + height > LCD_HEIGHT) |
| height = LCD_HEIGHT - y; /* Clip bottom */ |
| if (y < 0) |
| height += y, y = 0; /* Clip top */ |
| if (height <= 0) |
| return; /* nothing left to do */ |
| |
| /* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer |
| * and lcd_framebuffer */ |
| dst = (fb_data *)FRAME + LCD_WIDTH*y + x; |
| src = &lcd_framebuffer[y][x]; |
| |
| /* Copy part of the Rockbox framebuffer to the second framebuffer */ |
| if (width < LCD_WIDTH) |
| { |
| /* Not full width - do line-by-line */ |
| lcd_copy_buffer_rect(dst, src, width, height); |
| } |
| else |
| { |
| /* Full width - copy as one line */ |
| lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1); |
| } |
| } |
| |
| void lcd_enable(bool state) |
| { |
| (void)state; |
| } |
| |
| bool lcd_enabled(void) |
| { |
| return true; |
| } |
| |
| /* Update the display. |
| This must be called after all other LCD functions that change the display. */ |
| void lcd_update(void) |
| { |
| if (!lcd_on) |
| return; |
| |
| lcd_copy_buffer_rect((fb_data *)FRAME, &lcd_framebuffer[0][0], |
| LCD_WIDTH*LCD_HEIGHT, 1); |
| } |
| |
| void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y, |
| int stride, int x, int y, int width, |
| int height) |
| { |
| int w, px; |
| fb_data *dst; |
| |
| if (x + width > current_vp->width) |
| width = current_vp->width - x; /* Clip right */ |
| if (x < 0) |
| width += x, x = 0; /* Clip left */ |
| if (width <= 0) |
| return; /* nothing left to do */ |
| |
| if (y + height > current_vp->height) |
| height = current_vp->height - y; /* Clip bottom */ |
| if (y < 0) |
| height += y, y = 0; /* Clip top */ |
| if (height <= 0) |
| return; /* nothing left to do */ |
| |
| src += stride * src_y + src_x; /* move starting point */ |
| dst = &lcd_framebuffer[current_vp->y+y][current_vp->x+x]; |
| |
| asm volatile ( |
| ".rowstart: \r\n" |
| "mov %[w], %[width] \r\n" /* Load width for inner loop */ |
| ".nextpixel: \r\n" |
| "ldrh %[px], [%[s]], #2 \r\n" /* Load src pixel */ |
| "add %[d], %[d], #2 \r\n" /* Uncoditionally increment dst */ |
| "cmp %[px], %[fgcolor] \r\n" /* Compare to foreground color */ |
| "streqh %[fgpat], [%[d], #-2] \r\n" /* Store foregroud if match */ |
| "cmpne %[px], %[transcolor] \r\n" /* Compare to transparent color */ |
| "strneh %[px], [%[d], #-2] \r\n" /* Store dst if not transparent */ |
| "subs %[w], %[w], #1 \r\n" /* Width counter has run down? */ |
| "bgt .nextpixel \r\n" /* More in this row? */ |
| "add %[s], %[s], %[sstp], lsl #1 \r\n" /* Skip over to start of next line */ |
| "add %[d], %[d], %[dstp], lsl #1 \r\n" |
| "subs %[h], %[h], #1 \r\n" /* Height counter has run down? */ |
| "bgt .rowstart \r\n" /* More rows? */ |
| : [w]"=&r"(w), [h]"+&r"(height), [px]"=&r"(px), |
| [s]"+&r"(src), [d]"+&r"(dst) |
| : [width]"r"(width), |
| [sstp]"r"(stride - width), |
| [dstp]"r"(LCD_WIDTH - width), |
| [transcolor]"r"(TRANSPARENT_COLOR), |
| [fgcolor]"r"(REPLACEWITHFG_COLOR), |
| [fgpat]"r"(current_vp->fg_pattern) |
| ); |
| } |
| |
| void lcd_yuv_set_options(unsigned options) |
| { |
| lcd_yuv_options = options; |
| } |
| |
| /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */ |
| extern void lcd_write_yuv420_lines(fb_data *dst, |
| unsigned char const * const src[3], |
| int width, |
| int stride); |
| extern void lcd_write_yuv420_lines_odither(fb_data *dst, |
| unsigned char const * const src[3], |
| int width, |
| int stride, |
| int x_screen, /* To align dither pattern */ |
| int y_screen); |
| /* Performance function to blit a YUV bitmap directly to the LCD */ |
| /* For the Gigabeat - show it rotated */ |
| /* So the LCD_WIDTH is now the height */ |
| void lcd_blit_yuv(unsigned char * const src[3], |
| int src_x, int src_y, int stride, |
| int x, int y, int width, int height) |
| { |
| /* Caches for chroma data so it only need be recaculated every other |
| line */ |
| unsigned char const * yuv_src[3]; |
| off_t z; |
| |
| if (!lcd_on) |
| return; |
| |
| /* Sorry, but width and height must be >= 2 or else */ |
| width &= ~1; |
| height >>= 1; |
| |
| y = LCD_WIDTH - 1 - y; |
| fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + y; |
| |
| z = stride*src_y; |
| yuv_src[0] = src[0] + z + src_x; |
| yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1); |
| yuv_src[2] = src[2] + (yuv_src[1] - src[1]); |
| |
| if (lcd_yuv_options & LCD_YUV_DITHER) |
| { |
| do |
| { |
| lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x); |
| yuv_src[0] += stride << 1; /* Skip down two luma lines */ |
| yuv_src[1] += stride >> 1; /* Skip down one chroma line */ |
| yuv_src[2] += stride >> 1; |
| dst -= 2; |
| y -= 2; |
| } |
| while (--height > 0); |
| } |
| else |
| { |
| do |
| { |
| lcd_write_yuv420_lines(dst, yuv_src, width, stride); |
| yuv_src[0] += stride << 1; /* Skip down two luma lines */ |
| yuv_src[1] += stride >> 1; /* Skip down one chroma line */ |
| yuv_src[2] += stride >> 1; |
| dst -= 2; |
| } |
| while (--height > 0); |
| } |
| } |
| |
| void lcd_set_contrast(int val) { |
| (void) val; |
| // TODO: |
| } |
| |
| void lcd_set_invert_display(bool yesno) { |
| (void) yesno; |
| // TODO: |
| } |
| |
| void lcd_set_flip(bool yesno) { |
| (void) yesno; |
| // TODO: |
| } |
| |