diff options
Diffstat (limited to 'common/lcd.c')
| -rw-r--r-- | common/lcd.c | 178 |
1 files changed, 174 insertions, 4 deletions
diff --git a/common/lcd.c b/common/lcd.c index b6be8002d2..4c83a8bf03 100644 --- a/common/lcd.c +++ b/common/lcd.c @@ -642,6 +642,138 @@ static void splash_align_axis(int *axis, unsigned long panel_size, } #endif + +#ifdef CONFIG_LCD_BMP_RLE8 + +#define BMP_RLE8_ESCAPE 0 +#define BMP_RLE8_EOL 0 +#define BMP_RLE8_EOBMP 1 +#define BMP_RLE8_DELTA 2 + +static void draw_unencoded_bitmap(ushort **fbp, uchar *bmap, ushort *cmap, + int cnt) +{ + while (cnt > 0) { + *(*fbp)++ = cmap[*bmap++]; + cnt--; + } +} + +static void draw_encoded_bitmap(ushort **fbp, ushort c, int cnt) +{ + ushort *fb = *fbp; + int cnt_8copy = cnt >> 3; + + cnt -= cnt_8copy << 3; + while (cnt_8copy > 0) { + *fb++ = c; + *fb++ = c; + *fb++ = c; + *fb++ = c; + *fb++ = c; + *fb++ = c; + *fb++ = c; + *fb++ = c; + cnt_8copy--; + } + while (cnt > 0) { + *fb++ = c; + cnt--; + } + (*fbp) = fb; +} + +/* + * Do not call this function directly, must be called from + * lcd_display_bitmap. + */ +static void lcd_display_rle8_bitmap(bmp_image_t *bmp, ushort *cmap, uchar *fb, + int x_off, int y_off) +{ + uchar *bmap; + ulong width, height; + ulong cnt, runlen; + int x, y; + int decode = 1; + + width = le32_to_cpu(bmp->header.width); + height = le32_to_cpu(bmp->header.height); + bmap = (uchar *)bmp + le32_to_cpu(bmp->header.data_offset); + + x = 0; + y = height - 1; + + while (decode) { + if (bmap[0] == BMP_RLE8_ESCAPE) { + switch (bmap[1]) { + case BMP_RLE8_EOL: + /* end of line */ + bmap += 2; + x = 0; + y--; + /* 16bpix, 2-byte per pixel, width should *2 */ + fb -= (width * 2 + lcd_line_length); + break; + case BMP_RLE8_EOBMP: + /* end of bitmap */ + decode = 0; + break; + case BMP_RLE8_DELTA: + /* delta run */ + x += bmap[2]; + y -= bmap[3]; + /* 16bpix, 2-byte per pixel, x should *2 */ + fb = (uchar *) (lcd_base + (y + y_off - 1) + * lcd_line_length + (x + x_off) * 2); + bmap += 4; + break; + default: + /* unencoded run */ + runlen = bmap[1]; + bmap += 2; + if (y < height) { + if (x < width) { + if (x + runlen > width) + cnt = width - x; + else + cnt = runlen; + draw_unencoded_bitmap( + (ushort **)&fb, + bmap, cmap, cnt); + } + x += runlen; + } + bmap += runlen; + if (runlen & 1) + bmap++; + } + } else { + /* encoded run */ + if (y < height) { + runlen = bmap[0]; + if (x < width) { + /* aggregate the same code */ + while (bmap[0] == 0xff && + bmap[2] != BMP_RLE8_ESCAPE && + bmap[1] == bmap[3]) { + runlen += bmap[2]; + bmap += 2; + } + if (x + runlen > width) + cnt = width - x; + else + cnt = runlen; + draw_encoded_bitmap((ushort **)&fb, + cmap[bmap[1]], cnt); + } + x += runlen; + } + bmap += 2; + } + } +} +#endif + #if defined(CONFIG_MPC823) || defined(CONFIG_MCC200) #define FB_PUT_BYTE(fb, from) *(fb)++ = (255 - *(from)++) #else @@ -675,7 +807,7 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y) uchar *fb; bmp_image_t *bmp=(bmp_image_t *)bmp_image; uchar *bmap; - ushort padded_line; + ushort padded_width; unsigned long width, height, byte_width; unsigned long pwidth = panel_info.vl_col; unsigned colors, bpix, bmp_bpix; @@ -762,7 +894,7 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y) } #endif - padded_line = (width&0x3) ? ((width&~0x3)+4) : (width); + padded_width = (width&0x3) ? ((width&~0x3)+4) : (width); #ifdef CONFIG_SPLASH_SCREEN_ALIGN splash_align_axis(&x, pwidth, width); @@ -781,6 +913,18 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y) switch (bmp_bpix) { case 1: /* pass through */ case 8: +#ifdef CONFIG_LCD_BMP_RLE8 + if (le32_to_cpu(bmp->header.compression) == BMP_BI_RLE8) { + if (bpix != 16) { + /* TODO implement render code for bpix != 16 */ + printf("Error: only support 16 bpix"); + return 1; + } + lcd_display_rle8_bitmap(bmp, cmap_base, fb, x, y); + break; + } +#endif + if (bpix != 16) byte_width = width; else @@ -796,7 +940,7 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y) fb += sizeof(uint16_t) / sizeof(*fb); } } - bmap += (width - padded_line); + bmap += (padded_width - width); fb -= (byte_width + lcd_line_length); } break; @@ -808,7 +952,7 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y) for (j = 0; j < width; j++) fb_put_word(&fb, &bmap); - bmap += (padded_line - width) * 2; + bmap += (padded_width - width) * 2; fb -= (width * 2 + lcd_line_length); } break; @@ -885,5 +1029,31 @@ static void *lcd_logo(void) #endif /* CONFIG_LCD_LOGO && !CONFIG_LCD_INFO_BELOW_LOGO */ } +void lcd_position_cursor(unsigned col, unsigned row) +{ + console_col = min(col, CONSOLE_COLS - 1); + console_row = min(row, CONSOLE_ROWS - 1); +} + +int lcd_get_pixel_width(void) +{ + return panel_info.vl_col; +} + +int lcd_get_pixel_height(void) +{ + return panel_info.vl_row; +} + +int lcd_get_screen_rows(void) +{ + return CONSOLE_ROWS; +} + +int lcd_get_screen_columns(void) +{ + return CONSOLE_COLS; +} + /************************************************************************/ /************************************************************************/ |