| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2006,2007,2008 Free Software Foundation, Inc. |
| * |
| * GRUB 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 3 of the License, or |
| * (at your option) any later version. |
| * |
| * GRUB is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* SPECIAL NOTES! |
| |
| Please note following when reading the code below: |
| |
| - In this driver we assume that every memory can be accessed by same memory |
| bus. If there are different address spaces do not use this code as a base |
| code for other archs. |
| |
| - Every function in this code assumes that bounds checking has been done in |
| previous phase and they are opted out in here. */ |
| |
| #include <grub/video_fb.h> |
| #include <grub/fbfill.h> |
| #include <grub/fbutil.h> |
| #include <grub/types.h> |
| #include <grub/video.h> |
| |
| /* Generic filler that works for every supported mode. */ |
| static void |
| grub_video_fbfill (struct grub_video_fbblit_info *dst, |
| grub_video_color_t color, int x, int y, |
| int width, int height) |
| { |
| int i; |
| int j; |
| |
| for (j = 0; j < height; j++) |
| for (i = 0; i < width; i++) |
| set_pixel (dst, x + i, y + j, color); |
| } |
| |
| /* Optimized filler for direct color 32 bit modes. It is assumed that color |
| is already mapped to destination format. */ |
| static void |
| grub_video_fbfill_direct32 (struct grub_video_fbblit_info *dst, |
| grub_video_color_t color, int x, int y, |
| int width, int height) |
| { |
| int i; |
| int j; |
| grub_uint32_t *dstptr; |
| grub_size_t rowskip; |
| |
| /* Calculate the number of bytes to advance from the end of one line |
| to the beginning of the next line. */ |
| rowskip = dst->mode_info->pitch - dst->mode_info->bytes_per_pixel * width; |
| |
| /* Get the start address. */ |
| dstptr = grub_video_fb_get_video_ptr (dst, x, y); |
| |
| for (j = 0; j < height; j++) |
| { |
| for (i = 0; i < width; i++) |
| *dstptr++ = color; |
| |
| /* Advance the dest pointer to the right location on the next line. */ |
| GRUB_VIDEO_FB_ADVANCE_POINTER (dstptr, rowskip); |
| } |
| } |
| |
| /* Optimized filler for direct color 24 bit modes. It is assumed that color |
| is already mapped to destination format. */ |
| static void |
| grub_video_fbfill_direct24 (struct grub_video_fbblit_info *dst, |
| grub_video_color_t color, int x, int y, |
| int width, int height) |
| { |
| int i; |
| int j; |
| grub_size_t rowskip; |
| grub_uint8_t *dstptr; |
| #ifndef GRUB_CPU_WORDS_BIGENDIAN |
| grub_uint8_t fill0 = (grub_uint8_t)((color >> 0) & 0xFF); |
| grub_uint8_t fill1 = (grub_uint8_t)((color >> 8) & 0xFF); |
| grub_uint8_t fill2 = (grub_uint8_t)((color >> 16) & 0xFF); |
| #else |
| grub_uint8_t fill2 = (grub_uint8_t)((color >> 0) & 0xFF); |
| grub_uint8_t fill1 = (grub_uint8_t)((color >> 8) & 0xFF); |
| grub_uint8_t fill0 = (grub_uint8_t)((color >> 16) & 0xFF); |
| #endif |
| /* Calculate the number of bytes to advance from the end of one line |
| to the beginning of the next line. */ |
| rowskip = dst->mode_info->pitch - dst->mode_info->bytes_per_pixel * width; |
| |
| /* Get the start address. */ |
| dstptr = grub_video_fb_get_video_ptr (dst, x, y); |
| |
| for (j = 0; j < height; j++) |
| { |
| for (i = 0; i < width; i++) |
| { |
| *dstptr++ = fill0; |
| *dstptr++ = fill1; |
| *dstptr++ = fill2; |
| } |
| |
| /* Advance the dest pointer to the right location on the next line. */ |
| dstptr += rowskip; |
| } |
| } |
| |
| /* Optimized filler for direct color 16 bit modes. It is assumed that color |
| is already mapped to destination format. */ |
| static void |
| grub_video_fbfill_direct16 (struct grub_video_fbblit_info *dst, |
| grub_video_color_t color, int x, int y, |
| int width, int height) |
| { |
| int i; |
| int j; |
| grub_size_t rowskip; |
| grub_uint16_t *dstptr; |
| |
| /* Calculate the number of bytes to advance from the end of one line |
| to the beginning of the next line. */ |
| rowskip = (dst->mode_info->pitch - dst->mode_info->bytes_per_pixel * width); |
| |
| /* Get the start address. */ |
| dstptr = grub_video_fb_get_video_ptr (dst, x, y); |
| |
| for (j = 0; j < height; j++) |
| { |
| for (i = 0; i < width; i++) |
| *dstptr++ = color; |
| |
| /* Advance the dest pointer to the right location on the next line. */ |
| GRUB_VIDEO_FB_ADVANCE_POINTER (dstptr, rowskip); |
| } |
| } |
| |
| /* Optimized filler for index color. It is assumed that color |
| is already mapped to destination format. */ |
| static void |
| grub_video_fbfill_direct8 (struct grub_video_fbblit_info *dst, |
| grub_video_color_t color, int x, int y, |
| int width, int height) |
| { |
| int i; |
| int j; |
| grub_size_t rowskip; |
| grub_uint8_t *dstptr; |
| grub_uint8_t fill = (grub_uint8_t)color & 0xFF; |
| |
| /* Calculate the number of bytes to advance from the end of one line |
| to the beginning of the next line. */ |
| rowskip = dst->mode_info->pitch - dst->mode_info->bytes_per_pixel * width; |
| |
| /* Get the start address. */ |
| dstptr = grub_video_fb_get_video_ptr (dst, x, y); |
| |
| for (j = 0; j < height; j++) |
| { |
| for (i = 0; i < width; i++) |
| *dstptr++ = fill; |
| |
| /* Advance the dest pointer to the right location on the next line. */ |
| dstptr += rowskip; |
| } |
| } |
| |
| void |
| grub_video_fb_fill_dispatch (struct grub_video_fbblit_info *target, |
| grub_video_color_t color, int x, int y, |
| unsigned int width, unsigned int height) |
| { |
| /* Try to figure out more optimized version. Note that color is already |
| mapped to target format so we can make assumptions based on that. */ |
| switch (target->mode_info->bytes_per_pixel) |
| { |
| case 4: |
| grub_video_fbfill_direct32 (target, color, x, y, |
| width, height); |
| return; |
| case 3: |
| grub_video_fbfill_direct24 (target, color, x, y, |
| width, height); |
| return; |
| case 2: |
| grub_video_fbfill_direct16 (target, color, x, y, |
| width, height); |
| return; |
| case 1: |
| grub_video_fbfill_direct8 (target, color, x, y, |
| width, height); |
| return; |
| } |
| |
| /* No optimized version found, use default (slow) filler. */ |
| grub_video_fbfill (target, color, x, y, width, height); |
| } |