| /* ----------------------------------------------------------------------- * |
| * |
| * Copyright 2006-2008 H. Peter Anvin - All Rights Reserved |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, |
| * copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom |
| * the Software is furnished to do so, subject to the following |
| * conditions: |
| * |
| * The above copyright notice and this permission notice shall |
| * be included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| #include <inttypes.h> |
| #include <colortbl.h> |
| #include <string.h> |
| #include "vesa.h" |
| #include "video.h" |
| #include "fill.h" |
| |
| /* |
| * Visible cursor information |
| */ |
| static uint8_t cursor_pattern[FONT_MAX_HEIGHT]; |
| static struct vesa_char *cursor_pointer = NULL; |
| static int cursor_x, cursor_y; |
| |
| static inline void *copy_dword(void *dst, void *src, size_t dword_count) |
| { |
| asm volatile ("rep; movsl":"+D" (dst), "+S"(src), "+c"(dword_count)); |
| return dst; /* Updated destination pointer */ |
| } |
| |
| static inline __attribute__ ((always_inline)) |
| uint8_t alpha_val(uint8_t fg, uint8_t bg, uint8_t alpha) |
| { |
| unsigned int tmp; |
| |
| tmp = __vesacon_srgb_to_linear[fg] * alpha; |
| tmp += __vesacon_srgb_to_linear[bg] * (255 - alpha); |
| |
| return __vesacon_linear_to_srgb[tmp >> 12]; |
| } |
| |
| static uint32_t alpha_pixel(uint32_t fg, uint32_t bg) |
| { |
| uint8_t alpha = fg >> 24; |
| uint8_t fg_r = fg >> 16; |
| uint8_t fg_g = fg >> 8; |
| uint8_t fg_b = fg; |
| uint8_t bg_r = bg >> 16; |
| uint8_t bg_g = bg >> 8; |
| uint8_t bg_b = bg; |
| |
| return |
| (alpha_val(fg_r, bg_r, alpha) << 16) | |
| (alpha_val(fg_g, bg_g, alpha) << 8) | (alpha_val(fg_b, bg_b, alpha)); |
| } |
| |
| static void vesacon_update_characters(int row, int col, int nrows, int ncols) |
| { |
| const int height = __vesacon_font_height; |
| const int width = FONT_WIDTH; |
| uint32_t *bgrowptr, *bgptr, bgval, fgval; |
| uint32_t fgcolor = 0, bgcolor = 0, color; |
| uint8_t chbits = 0, chxbits = 0, chsbits = 0; |
| int i, j, jx, pixrow, pixsrow; |
| struct vesa_char *rowptr, *rowsptr, *cptr, *csptr; |
| unsigned int bytes_per_pixel = __vesacon_bytes_per_pixel; |
| unsigned long pixel_offset; |
| uint32_t row_buffer[__vesa_info.mi.h_res], *rowbufptr; |
| size_t fbrowptr; |
| uint8_t sha; |
| |
| pixel_offset = ((row * height + VIDEO_BORDER) * __vesa_info.mi.h_res) + |
| (col * width + VIDEO_BORDER); |
| |
| bgrowptr = &__vesacon_background[pixel_offset]; |
| fbrowptr = (row * height + VIDEO_BORDER) * __vesa_info.mi.logical_scan + |
| (col * width + VIDEO_BORDER) * bytes_per_pixel; |
| |
| /* Note that we keep a 1-character guard area around the real text area... */ |
| rowptr = &__vesacon_text_display[(row+1)*(__vesacon_text_cols+2)+(col+1)]; |
| rowsptr = rowptr - ((__vesacon_text_cols+2)+1); |
| pixrow = 0; |
| pixsrow = height - 1; |
| |
| for (i = height * nrows; i >= 0; i--) { |
| bgptr = bgrowptr; |
| rowbufptr = row_buffer; |
| |
| cptr = rowptr; |
| csptr = rowsptr; |
| |
| chsbits = __vesacon_graphics_font[csptr->ch][pixsrow]; |
| if (__unlikely(csptr == cursor_pointer)) |
| chsbits |= cursor_pattern[pixsrow]; |
| sha = console_color_table[csptr->attr].shadow; |
| chsbits &= (sha & 0x02) ? 0xff : 0x00; |
| chsbits ^= (sha & 0x01) ? 0xff : 0x00; |
| chsbits <<= (width - 2); |
| csptr++; |
| |
| /* Draw two pixels beyond the end of the line. One for the shadow, |
| and one to make sure we have a whole dword of data for the copy |
| operation at the end. Note that this code depends on the fact that |
| all characters begin on dword boundaries in the frame buffer. */ |
| |
| for (jx = 1, j = width * ncols + 1; j >= 0; j--) { |
| chbits <<= 1; |
| chsbits <<= 1; |
| chxbits <<= 1; |
| |
| switch (jx) { |
| case 1: |
| chbits = __vesacon_graphics_font[cptr->ch][pixrow]; |
| if (__unlikely(cptr == cursor_pointer)) |
| chbits |= cursor_pattern[pixrow]; |
| sha = console_color_table[cptr->attr].shadow; |
| chxbits = chbits; |
| chxbits &= (sha & 0x02) ? 0xff : 0x00; |
| chxbits ^= (sha & 0x01) ? 0xff : 0x00; |
| fgcolor = console_color_table[cptr->attr].argb_fg; |
| bgcolor = console_color_table[cptr->attr].argb_bg; |
| cptr++; |
| jx--; |
| break; |
| case 0: |
| chsbits = __vesacon_graphics_font[csptr->ch][pixsrow]; |
| if (__unlikely(csptr == cursor_pointer)) |
| chsbits |= cursor_pattern[pixsrow]; |
| sha = console_color_table[csptr->attr].shadow; |
| chsbits &= (sha & 0x02) ? 0xff : 0x00; |
| chsbits ^= (sha & 0x01) ? 0xff : 0x00; |
| csptr++; |
| jx = width - 1; |
| break; |
| default: |
| jx--; |
| break; |
| } |
| |
| /* If this pixel is raised, use the offsetted value */ |
| bgval = (chxbits & 0x80) |
| ? bgptr[__vesa_info.mi.h_res + 1] : *bgptr; |
| bgptr++; |
| |
| /* If this pixel is set, use the fg color, else the bg color */ |
| fgval = (chbits & 0x80) ? fgcolor : bgcolor; |
| |
| /* Produce the combined color pixel value */ |
| color = alpha_pixel(fgval, bgval); |
| |
| /* Apply the shadow (75% shadow) */ |
| if ((chsbits & ~chxbits) & 0x80) { |
| color >>= 2; |
| color &= 0x3f3f3f; |
| } |
| |
| *rowbufptr++ = color; |
| } |
| |
| /* Copy to frame buffer */ |
| __vesacon_copy_to_screen(fbrowptr, row_buffer, rowbufptr - row_buffer); |
| |
| bgrowptr += __vesa_info.mi.h_res; |
| fbrowptr += __vesa_info.mi.logical_scan; |
| |
| if (++pixrow == height) { |
| rowptr += __vesacon_text_cols + 2; |
| pixrow = 0; |
| } |
| if (++pixsrow == height) { |
| rowsptr += __vesacon_text_cols + 2; |
| pixsrow = 0; |
| } |
| } |
| } |
| |
| /* Bounding box for changed text. The (x1, y1) coordinates are +1! */ |
| static unsigned int upd_x0 = -1U, upd_x1, upd_y0 = -1U, upd_y1; |
| |
| /* Update the range already touched by various variables */ |
| void __vesacon_doit(void) |
| { |
| if (upd_x1 > upd_x0 && upd_y1 > upd_y0) { |
| vesacon_update_characters(upd_y0, upd_x0, upd_y1 - upd_y0, |
| upd_x1 - upd_x0); |
| upd_x0 = upd_y0 = -1U; |
| upd_x1 = upd_y1 = 0; |
| } |
| } |
| |
| /* Mark a range for update; note argument sequence is the same as |
| vesacon_update_characters() */ |
| static inline void vesacon_touch(int row, int col, int rows, int cols) |
| { |
| unsigned int y0 = row; |
| unsigned int x0 = col; |
| unsigned int y1 = y0 + rows; |
| unsigned int x1 = x0 + cols; |
| |
| if (y0 < upd_y0) |
| upd_y0 = y0; |
| if (y1 > upd_y1) |
| upd_y1 = y1; |
| if (x0 < upd_x0) |
| upd_x0 = x0; |
| if (x1 > upd_x1) |
| upd_x1 = x1; |
| } |
| |
| /* Erase a region of the screen */ |
| void __vesacon_erase(int x0, int y0, int x1, int y1, attr_t attr) |
| { |
| int y; |
| struct vesa_char *ptr = &__vesacon_text_display |
| [(y0 + 1) * (__vesacon_text_cols + 2) + (x0 + 1)]; |
| struct vesa_char fill = { |
| .ch = ' ', |
| .attr = attr, |
| }; |
| int ncols = x1 - x0 + 1; |
| |
| for (y = y0; y <= y1; y++) { |
| vesacon_fill(ptr, fill, ncols); |
| ptr += __vesacon_text_cols + 2; |
| } |
| |
| vesacon_touch(y0, x0, y1 - y0 + 1, ncols); |
| } |
| |
| /* Scroll the screen up */ |
| void __vesacon_scroll_up(int nrows, attr_t attr) |
| { |
| struct vesa_char *fromptr = &__vesacon_text_display |
| [(nrows + 1) * (__vesacon_text_cols + 2)]; |
| struct vesa_char *toptr = &__vesacon_text_display |
| [(__vesacon_text_cols + 2)]; |
| int dword_count = |
| (__vesacon_text_rows - nrows) * (__vesacon_text_cols + 2); |
| struct vesa_char fill = { |
| .ch = ' ', |
| .attr = attr, |
| }; |
| |
| toptr = copy_dword(toptr, fromptr, dword_count); |
| |
| dword_count = nrows * (__vesacon_text_cols + 2); |
| |
| vesacon_fill(toptr, fill, dword_count); |
| |
| vesacon_touch(0, 0, __vesacon_text_rows, __vesacon_text_cols); |
| } |
| |
| /* Draw one character text at a specific area of the screen */ |
| void __vesacon_write_char(int x, int y, uint8_t ch, attr_t attr) |
| { |
| struct vesa_char *ptr = &__vesacon_text_display |
| [(y + 1) * (__vesacon_text_cols + 2) + (x + 1)]; |
| |
| ptr->ch = ch; |
| ptr->attr = attr; |
| |
| vesacon_touch(y, x, 1, 1); |
| } |
| |
| void __vesacon_set_cursor(int x, int y, bool visible) |
| { |
| struct vesa_char *ptr = &__vesacon_text_display |
| [(y + 1) * (__vesacon_text_cols + 2) + (x + 1)]; |
| |
| if (cursor_pointer) |
| vesacon_touch(cursor_y, cursor_x, 1, 1); |
| |
| if (!visible) { |
| /* Invisible cursor */ |
| cursor_pointer = NULL; |
| } else { |
| cursor_pointer = ptr; |
| vesacon_touch(y, x, 1, 1); |
| } |
| |
| cursor_x = x; |
| cursor_y = y; |
| } |
| |
| void __vesacon_init_cursor(int font_height) |
| { |
| int r0 = font_height - (font_height < 10 ? 2 : 3); |
| |
| if (r0 < 0) |
| r0 = 0; |
| |
| memset(cursor_pattern, 0, font_height); |
| cursor_pattern[r0] = 0xff; |
| cursor_pattern[r0 + 1] = 0xff; |
| } |
| |
| void __vesacon_redraw_text(void) |
| { |
| vesacon_update_characters(0, 0, __vesacon_text_rows, __vesacon_text_cols); |
| } |