ad5c4b6511
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17418 a1c6a512-1295-4272-9138-f99709370657
251 lines
7.8 KiB
C
251 lines
7.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Will Robertson
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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#include "string.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "lcd-target.h"
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#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
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static volatile bool lcd_on = true;
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volatile bool lcd_poweroff = false;
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static unsigned lcd_yuv_options = 0;
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/*
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** This is imported from lcd-16bit.c
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*/
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extern struct viewport* current_vp;
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/* Copies a rectangle from one framebuffer to another. Can be used in
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single transfer mode with width = num pixels, and height = 1 which
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allows a full-width rectangle to be copied more efficiently. */
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extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
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int width, int height);
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#if 0
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bool lcd_enabled()
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{
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return lcd_on;
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}
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#endif
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/* LCD init */
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void lcd_init_device(void)
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{
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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fb_data *dst, *src;
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if (!lcd_on)
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return;
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if (x + width > LCD_WIDTH)
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width = LCD_WIDTH - x; /* Clip right */
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if (x < 0)
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width += x, x = 0; /* Clip left */
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if (width <= 0)
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return; /* nothing left to do */
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if (y + height > LCD_HEIGHT)
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height = LCD_HEIGHT - y; /* Clip bottom */
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if (y < 0)
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height += y, y = 0; /* Clip top */
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if (height <= 0)
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return; /* nothing left to do */
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/* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
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* and lcd_framebuffer */
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dst = (fb_data *)FRAME + LCD_WIDTH*y + x;
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src = &lcd_framebuffer[y][x];
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/* Copy part of the Rockbox framebuffer to the second framebuffer */
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if (width < LCD_WIDTH)
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{
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/* Not full width - do line-by-line */
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lcd_copy_buffer_rect(dst, src, width, height);
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}
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else
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{
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/* Full width - copy as one line */
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lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
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}
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}
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void lcd_enable(bool state)
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{
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(void)state;
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}
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bool lcd_enabled(void)
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{
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return true;
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void)
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{
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if (!lcd_on)
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return;
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lcd_copy_buffer_rect((fb_data *)FRAME, &lcd_framebuffer[0][0],
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LCD_WIDTH*LCD_HEIGHT, 1);
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}
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void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y,
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int stride, int x, int y, int width,
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int height)
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{
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int w, px;
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fb_data *dst;
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if (x + width > current_vp->width)
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width = current_vp->width - x; /* Clip right */
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if (x < 0)
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width += x, x = 0; /* Clip left */
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if (width <= 0)
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return; /* nothing left to do */
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if (y + height > current_vp->height)
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height = current_vp->height - y; /* Clip bottom */
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if (y < 0)
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height += y, y = 0; /* Clip top */
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if (height <= 0)
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return; /* nothing left to do */
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src += stride * src_y + src_x; /* move starting point */
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dst = &lcd_framebuffer[current_vp->y+y][current_vp->x+x];
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asm volatile (
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".rowstart: \r\n"
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"mov %[w], %[width] \r\n" /* Load width for inner loop */
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".nextpixel: \r\n"
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"ldrh %[px], [%[s]], #2 \r\n" /* Load src pixel */
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"add %[d], %[d], #2 \r\n" /* Uncoditionally increment dst */
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"cmp %[px], %[fgcolor] \r\n" /* Compare to foreground color */
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"streqh %[fgpat], [%[d], #-2] \r\n" /* Store foregroud if match */
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"cmpne %[px], %[transcolor] \r\n" /* Compare to transparent color */
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"strneh %[px], [%[d], #-2] \r\n" /* Store dst if not transparent */
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"subs %[w], %[w], #1 \r\n" /* Width counter has run down? */
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"bgt .nextpixel \r\n" /* More in this row? */
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"add %[s], %[s], %[sstp], lsl #1 \r\n" /* Skip over to start of next line */
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"add %[d], %[d], %[dstp], lsl #1 \r\n"
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"subs %[h], %[h], #1 \r\n" /* Height counter has run down? */
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"bgt .rowstart \r\n" /* More rows? */
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: [w]"=&r"(w), [h]"+&r"(height), [px]"=&r"(px),
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[s]"+&r"(src), [d]"+&r"(dst)
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: [width]"r"(width),
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[sstp]"r"(stride - width),
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[dstp]"r"(LCD_WIDTH - width),
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[transcolor]"r"(TRANSPARENT_COLOR),
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[fgcolor]"r"(REPLACEWITHFG_COLOR),
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[fgpat]"r"(current_vp->fg_pattern)
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);
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}
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void lcd_yuv_set_options(unsigned options)
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{
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lcd_yuv_options = options;
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}
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/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
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extern void lcd_write_yuv420_lines(fb_data *dst,
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unsigned char const * const src[3],
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int width,
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int stride);
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extern void lcd_write_yuv420_lines_odither(fb_data *dst,
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unsigned char const * const src[3],
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int width,
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int stride,
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int x_screen, /* To align dither pattern */
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int y_screen);
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/* Performance function to blit a YUV bitmap directly to the LCD */
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/* For the Gigabeat - show it rotated */
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/* So the LCD_WIDTH is now the height */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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/* Caches for chroma data so it only need be recaculated every other
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line */
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unsigned char const * yuv_src[3];
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off_t z;
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if (!lcd_on)
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return;
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/* Sorry, but width and height must be >= 2 or else */
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width &= ~1;
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height >>= 1;
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y = LCD_WIDTH - 1 - y;
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fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + y;
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z = stride*src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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if (lcd_yuv_options & LCD_YUV_DITHER)
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{
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do
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{
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lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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dst -= 2;
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y -= 2;
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}
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while (--height > 0);
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}
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else
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{
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do
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{
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lcd_write_yuv420_lines(dst, yuv_src, width, stride);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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dst -= 2;
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}
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while (--height > 0);
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}
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}
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void lcd_set_contrast(int val) {
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(void) val;
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// TODO:
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}
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void lcd_set_invert_display(bool yesno) {
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(void) yesno;
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// TODO:
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}
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void lcd_set_flip(bool yesno) {
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(void) yesno;
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// TODO:
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}
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