/* * 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); }