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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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#include <grub/video.h>
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#include <grub/video_fb.h>
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#include <grub/misc.h>
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#include <grub/fbblit.h>
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#include <grub/fbfill.h>
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#include <grub/fbutil.h>
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#include <grub/bitmap.h>
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struct grub_video_fbrender_target *render_target;
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struct grub_video_fbrender_target *front_target;
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struct grub_video_fbrender_target *back_target;
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struct grub_video_palette_data *palette;
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unsigned int palette_size;
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/* For page flipping strategy. */
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int displayed_page; /* The page # that is the front buffer. */
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int render_page; /* The page # that is the back buffer. */
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grub_video_fb_set_page_t set_page;
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char *offscreen_buffer;
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grub_video_fb_doublebuf_update_screen_t update_screen;
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/* Specify "standard" VGA palette, some video cards may
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need this and this will also be used when using RGB modes. */
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struct grub_video_palette_data grub_video_fbstd_colors[GRUB_VIDEO_FBSTD_NUMCOLORS] =
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{0x00, 0x00, 0x00, 0xFF}, // 0 = black
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{0x00, 0x00, 0xA8, 0xFF}, // 1 = blue
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{0x00, 0xA8, 0x00, 0xFF}, // 2 = green
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{0x00, 0xA8, 0xA8, 0xFF}, // 3 = cyan
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{0xA8, 0x00, 0x00, 0xFF}, // 4 = red
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{0xA8, 0x00, 0xA8, 0xFF}, // 5 = magenta
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{0xA8, 0x54, 0x00, 0xFF}, // 6 = brown
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{0xA8, 0xA8, 0xA8, 0xFF}, // 7 = light gray
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{0x54, 0x54, 0x54, 0xFF}, // 8 = dark gray
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{0x54, 0x54, 0xFE, 0xFF}, // 9 = bright blue
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{0x54, 0xFE, 0x54, 0xFF}, // 10 = bright green
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{0x54, 0xFE, 0xFE, 0xFF}, // 11 = bright cyan
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{0xFE, 0x54, 0x54, 0xFF}, // 12 = bright red
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{0xFE, 0x54, 0xFE, 0xFF}, // 13 = bright magenta
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{0xFE, 0xFE, 0x54, 0xFF}, // 14 = yellow
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{0xFE, 0xFE, 0xFE, 0xFF} // 15 = white
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grub_video_fb_init (void)
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grub_free (framebuffer.palette);
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framebuffer.render_target = 0;
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framebuffer.front_target = 0;
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framebuffer.back_target = 0;
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framebuffer.palette = 0;
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framebuffer.palette_size = 0;
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framebuffer.set_page = 0;
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grub_video_fb_fini (void)
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/* TODO: destroy render targets. */
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grub_free (framebuffer.offscreen_buffer);
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grub_free (framebuffer.palette);
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framebuffer.render_target = 0;
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framebuffer.front_target = 0;
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framebuffer.back_target = 0;
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framebuffer.palette = 0;
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framebuffer.palette_size = 0;
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framebuffer.set_page = 0;
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framebuffer.offscreen_buffer = 0;
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grub_video_fb_get_info (struct grub_video_mode_info *mode_info)
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/* Copy mode info from active render target. */
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grub_memcpy (mode_info, &framebuffer.render_target->mode_info,
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sizeof (struct grub_video_mode_info));
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return GRUB_ERR_NONE;
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grub_video_fb_get_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data)
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/* Assume that we know everything from index color palette. */
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for (i = 0; (i < count) && ((i + start) < framebuffer.palette_size); i++)
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palette_data[i] = framebuffer.palette[start + i];
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return GRUB_ERR_NONE;
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grub_video_fb_set_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data)
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if (start + count > framebuffer.palette_size)
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framebuffer.palette_size = start + count;
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framebuffer.palette = grub_realloc (framebuffer.palette,
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sizeof (framebuffer.palette[0])
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* framebuffer.palette_size);
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if (!framebuffer.palette)
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grub_video_fb_fini ();
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for (i = 0; (i < count) && ((i + start) < framebuffer.palette_size); i++)
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framebuffer.palette[start + i] = palette_data[i];
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return GRUB_ERR_NONE;
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grub_video_fb_set_viewport (unsigned int x, unsigned int y,
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unsigned int width, unsigned int height)
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/* Make sure viewport is withing screen dimensions. If viewport was set
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to be out of the region, mark its size as zero. */
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if (x > framebuffer.render_target->mode_info.width)
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if (y > framebuffer.render_target->mode_info.height)
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if (x + width > framebuffer.render_target->mode_info.width)
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width = framebuffer.render_target->mode_info.width - x;
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if (y + height > framebuffer.render_target->mode_info.height)
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height = framebuffer.render_target->mode_info.height - y;
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framebuffer.render_target->viewport.x = x;
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framebuffer.render_target->viewport.y = y;
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framebuffer.render_target->viewport.width = width;
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framebuffer.render_target->viewport.height = height;
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return GRUB_ERR_NONE;
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grub_video_fb_get_viewport (unsigned int *x, unsigned int *y,
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unsigned int *width, unsigned int *height)
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if (x) *x = framebuffer.render_target->viewport.x;
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if (y) *y = framebuffer.render_target->viewport.y;
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if (width) *width = framebuffer.render_target->viewport.width;
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if (height) *height = framebuffer.render_target->viewport.height;
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return GRUB_ERR_NONE;
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/* Maps color name to target optimized color format. */
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grub_video_fb_map_color (grub_uint32_t color_name)
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/* TODO: implement color theme mapping code. */
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if (color_name < framebuffer.palette_size)
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if ((framebuffer.render_target->mode_info.mode_type
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& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
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grub_video_color_t color;
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color = grub_video_fb_map_rgb (framebuffer.palette[color_name].r,
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framebuffer.palette[color_name].g,
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framebuffer.palette[color_name].b);
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/* Maps RGB to target optimized color format. */
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grub_video_fb_map_rgb (grub_uint8_t red, grub_uint8_t green,
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if ((framebuffer.render_target->mode_info.mode_type
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& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
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/* Find best matching color. */
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for (i = 0; i < framebuffer.palette_size; i++)
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val = framebuffer.palette[i].r - red;
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val = framebuffer.palette[i].g - green;
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val = framebuffer.palette[i].b - blue;
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else if ((framebuffer.render_target->mode_info.mode_type
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& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
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if (red == framebuffer.render_target->mode_info.fg_red
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&& green == framebuffer.render_target->mode_info.fg_green
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&& blue == framebuffer.render_target->mode_info.fg_blue)
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grub_uint8_t alpha = 255; /* Opaque color. */
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red >>= 8 - framebuffer.render_target->mode_info.red_mask_size;
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green >>= 8 - framebuffer.render_target->mode_info.green_mask_size;
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blue >>= 8 - framebuffer.render_target->mode_info.blue_mask_size;
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alpha >>= 8 - framebuffer.render_target->mode_info.reserved_mask_size;
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value = red << framebuffer.render_target->mode_info.red_field_pos;
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value |= green << framebuffer.render_target->mode_info.green_field_pos;
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value |= blue << framebuffer.render_target->mode_info.blue_field_pos;
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value |= alpha << framebuffer.render_target->mode_info.reserved_field_pos;
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/* Maps RGBA to target optimized color format. */
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grub_video_fb_map_rgba (grub_uint8_t red, grub_uint8_t green,
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grub_uint8_t blue, grub_uint8_t alpha)
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if ((framebuffer.render_target->mode_info.mode_type
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& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
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/* No alpha available in index color modes, just use
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same value as in only RGB modes. */
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return grub_video_fb_map_rgb (red, green, blue);
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else if ((framebuffer.render_target->mode_info.mode_type
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& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
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if (red == framebuffer.render_target->mode_info.fg_red
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&& green == framebuffer.render_target->mode_info.fg_green
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&& blue == framebuffer.render_target->mode_info.fg_blue
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&& alpha == framebuffer.render_target->mode_info.fg_alpha)
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red >>= 8 - framebuffer.render_target->mode_info.red_mask_size;
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green >>= 8 - framebuffer.render_target->mode_info.green_mask_size;
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blue >>= 8 - framebuffer.render_target->mode_info.blue_mask_size;
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alpha >>= 8 - framebuffer.render_target->mode_info.reserved_mask_size;
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value = red << framebuffer.render_target->mode_info.red_field_pos;
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value |= green << framebuffer.render_target->mode_info.green_field_pos;
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value |= blue << framebuffer.render_target->mode_info.blue_field_pos;
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value |= alpha << framebuffer.render_target->mode_info.reserved_field_pos;
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/* Splits target optimized format to components. */
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grub_video_fb_unmap_color (grub_video_color_t color,
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grub_uint8_t *red, grub_uint8_t *green,
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grub_uint8_t *blue, grub_uint8_t *alpha)
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struct grub_video_fbblit_info target_info;
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target_info.mode_info = &framebuffer.render_target->mode_info;
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target_info.data = framebuffer.render_target->data;
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grub_video_fb_unmap_color_int (&target_info, color, red, green, blue, alpha);
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return GRUB_ERR_NONE;
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/* Splits color in source format to components. */
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grub_video_fb_unmap_color_int (struct grub_video_fbblit_info * source,
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grub_video_color_t color,
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grub_uint8_t *red, grub_uint8_t *green,
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grub_uint8_t *blue, grub_uint8_t *alpha)
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struct grub_video_mode_info *mode_info;
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mode_info = source->mode_info;
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if ((mode_info->mode_type
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& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
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/* If we have an out-of-bounds color, return transparent black. */
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*red = framebuffer.palette[color].r;
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*green = framebuffer.palette[color].g;
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*blue = framebuffer.palette[color].b;
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*alpha = framebuffer.palette[color].a;
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else if ((mode_info->mode_type
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& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
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*red = mode_info->fg_red;
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*green = mode_info->fg_green;
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*blue = mode_info->fg_blue;
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*alpha = mode_info->fg_alpha;
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*red = mode_info->bg_red;
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*green = mode_info->bg_green;
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*blue = mode_info->bg_blue;
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*alpha = mode_info->bg_alpha;
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/* Get red component. */
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tmp = color >> mode_info->red_field_pos;
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tmp &= (1 << mode_info->red_mask_size) - 1;
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tmp <<= 8 - mode_info->red_mask_size;
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tmp |= (1 << (8 - mode_info->red_mask_size)) - 1;
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/* Get green component. */
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tmp = color >> mode_info->green_field_pos;
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tmp &= (1 << mode_info->green_mask_size) - 1;
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tmp <<= 8 - mode_info->green_mask_size;
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tmp |= (1 << (8 - mode_info->green_mask_size)) - 1;
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/* Get blue component. */
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tmp = color >> mode_info->blue_field_pos;
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tmp &= (1 << mode_info->blue_mask_size) - 1;
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tmp <<= 8 - mode_info->blue_mask_size;
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tmp |= (1 << (8 - mode_info->blue_mask_size)) - 1;
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/* Get alpha component. */
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if (source->mode_info->reserved_mask_size > 0)
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tmp = color >> mode_info->reserved_field_pos;
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tmp &= (1 << mode_info->reserved_mask_size) - 1;
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tmp <<= 8 - mode_info->reserved_mask_size;
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tmp |= (1 << (8 - mode_info->reserved_mask_size)) - 1;
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/* If there is no alpha component, assume it opaque. */
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grub_video_fb_fill_rect (grub_video_color_t color, int x, int y,
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unsigned int width, unsigned int height)
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struct grub_video_fbblit_info target;
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/* Make sure there is something to do. */
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if ((x >= (int)framebuffer.render_target->viewport.width) || (x + (int)width < 0))
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return GRUB_ERR_NONE;
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if ((y >= (int)framebuffer.render_target->viewport.height) || (y + (int)height < 0))
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return GRUB_ERR_NONE;
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/* Do not allow drawing out of viewport. */
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if ((x + width) > framebuffer.render_target->viewport.width)
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width = framebuffer.render_target->viewport.width - x;
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if ((y + height) > framebuffer.render_target->viewport.height)
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height = framebuffer.render_target->viewport.height - y;
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/* Add viewport offset. */
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x += framebuffer.render_target->viewport.x;
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y += framebuffer.render_target->viewport.y;
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/* Use fbblit_info to encapsulate rendering. */
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target.mode_info = &framebuffer.render_target->mode_info;
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target.data = framebuffer.render_target->data;
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/* Try to figure out more optimized version. Note that color is already
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mapped to target format so we can make assumptions based on that. */
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if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
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grub_video_fbfill_direct32 (&target, color, x, y,
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return GRUB_ERR_NONE;
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else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
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grub_video_fbfill_direct32 (&target, color, x, y,
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return GRUB_ERR_NONE;
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else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
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grub_video_fbfill_direct24 (&target, color, x, y,
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return GRUB_ERR_NONE;
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else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_565)
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grub_video_fbfill_direct16 (&target, color, x, y,
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return GRUB_ERR_NONE;
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else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_565)
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grub_video_fbfill_direct16 (&target, color, x, y,
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return GRUB_ERR_NONE;
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else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
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grub_video_fbfill_direct8 (&target, color, x, y,
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return GRUB_ERR_NONE;
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/* No optimized version found, use default (slow) filler. */
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grub_video_fbfill (&target, color, x, y, width, height);
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return GRUB_ERR_NONE;
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/* NOTE: This function assumes that given coordinates are within bounds of
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common_blitter (struct grub_video_fbblit_info *target,
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struct grub_video_fbblit_info *source,
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enum grub_video_blit_operators oper, int x, int y,
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unsigned int width, unsigned int height,
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int offset_x, int offset_y)
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if (oper == GRUB_VIDEO_BLIT_REPLACE)
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/* Try to figure out more optimized version for replace operator. */
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if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
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if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
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grub_video_fbblit_replace_directN (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
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grub_video_fbblit_replace_BGRX8888_RGBX8888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
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grub_video_fbblit_replace_BGR888_RGBX8888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
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grub_video_fbblit_replace_RGB888_RGBX8888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
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grub_video_fbblit_replace_index_RGBX8888 (target, source,
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else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
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if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
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grub_video_fbblit_replace_BGRX8888_RGB888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
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grub_video_fbblit_replace_RGBX8888_RGB888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
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grub_video_fbblit_replace_BGR888_RGB888 (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
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grub_video_fbblit_replace_directN (target, source,
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else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
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grub_video_fbblit_replace_index_RGB888 (target, source,
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else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
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if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
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grub_video_fbblit_replace_directN (target, source,
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else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
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if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
607
grub_video_fbblit_replace_directN (target, source,
613
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED)
615
if (target->mode_info->bpp == 32)
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grub_video_fbblit_replace_32bit_1bit (target, source,
622
else if (target->mode_info->bpp == 24)
624
grub_video_fbblit_replace_24bit_1bit (target, source,
629
else if (target->mode_info->bpp == 16)
631
grub_video_fbblit_replace_16bit_1bit (target, source,
636
else if (target->mode_info->bpp == 8)
638
grub_video_fbblit_replace_8bit_1bit (target, source,
645
/* No optimized replace operator found, use default (slow) blitter. */
646
grub_video_fbblit_replace (target, source, x, y, width, height,
651
/* Try to figure out more optimized blend operator. */
652
if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
654
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
656
grub_video_fbblit_blend_BGRA8888_RGBA8888 (target, source,
661
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
663
grub_video_fbblit_blend_RGBA8888_RGBA8888 (target, source,
668
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
670
grub_video_fbblit_blend_BGR888_RGBA8888 (target, source,
675
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
677
grub_video_fbblit_blend_RGB888_RGBA8888 (target, source,
682
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
684
grub_video_fbblit_blend_index_RGBA8888 (target, source,
690
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
692
/* Note: There is really no alpha information here, so blend is
693
changed to replace. */
695
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
697
grub_video_fbblit_replace_BGRX8888_RGB888 (target, source,
702
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
704
grub_video_fbblit_replace_RGBX8888_RGB888 (target, source,
709
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
711
grub_video_fbblit_replace_BGR888_RGB888 (target, source,
716
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
718
grub_video_fbblit_replace_directN (target, source,
723
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
725
grub_video_fbblit_replace_index_RGB888 (target, source,
731
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED)
733
if (target->mode_info->blit_format
734
== GRUB_VIDEO_BLIT_FORMAT_BGRA_8888
735
|| target->mode_info->blit_format
736
== GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
738
grub_video_fbblit_blend_XXXA8888_1bit (target, source,
743
else if (target->mode_info->blit_format
744
== GRUB_VIDEO_BLIT_FORMAT_BGR_888
745
|| target->mode_info->blit_format
746
== GRUB_VIDEO_BLIT_FORMAT_RGB_888)
748
grub_video_fbblit_blend_XXX888_1bit (target, source,
753
else if (target->mode_info->blit_format
754
== GRUB_VIDEO_BLIT_FORMAT_BGR_565
755
|| target->mode_info->blit_format
756
== GRUB_VIDEO_BLIT_FORMAT_RGB_565)
758
grub_video_fbblit_blend_XXX565_1bit (target, source,
767
/* No optimized blend operation found, use default (slow) blitter. */
768
grub_video_fbblit_blend (target, source, x, y, width, height,
774
grub_video_fb_blit_bitmap (struct grub_video_bitmap *bitmap,
775
enum grub_video_blit_operators oper, int x, int y,
776
int offset_x, int offset_y,
777
unsigned int width, unsigned int height)
779
struct grub_video_fbblit_info source;
780
struct grub_video_fbblit_info target;
782
/* Make sure there is something to do. */
783
if ((width == 0) || (height == 0))
784
return GRUB_ERR_NONE;
785
if ((x >= (int)framebuffer.render_target->viewport.width) || (x + (int)width < 0))
786
return GRUB_ERR_NONE;
787
if ((y >= (int)framebuffer.render_target->viewport.height) || (y + (int)height < 0))
788
return GRUB_ERR_NONE;
789
if ((x + (int)bitmap->mode_info.width) < 0)
790
return GRUB_ERR_NONE;
791
if ((y + (int)bitmap->mode_info.height) < 0)
792
return GRUB_ERR_NONE;
793
if ((offset_x >= (int)bitmap->mode_info.width)
794
|| (offset_x + (int)width < 0))
795
return GRUB_ERR_NONE;
796
if ((offset_y >= (int)bitmap->mode_info.height)
797
|| (offset_y + (int)height < 0))
798
return GRUB_ERR_NONE;
800
/* If we have negative coordinates, optimize drawing to minimum. */
829
/* Do not allow drawing out of viewport. */
830
if ((x + width) > framebuffer.render_target->viewport.width)
831
width = framebuffer.render_target->viewport.width - x;
832
if ((y + height) > framebuffer.render_target->viewport.height)
833
height = framebuffer.render_target->viewport.height - y;
835
if ((offset_x + width) > bitmap->mode_info.width)
836
width = bitmap->mode_info.width - offset_x;
837
if ((offset_y + height) > bitmap->mode_info.height)
838
height = bitmap->mode_info.height - offset_y;
840
/* Limit drawing to source render target dimensions. */
841
if (width > bitmap->mode_info.width)
842
width = bitmap->mode_info.width;
844
if (height > bitmap->mode_info.height)
845
height = bitmap->mode_info.height;
847
/* Add viewport offset. */
848
x += framebuffer.render_target->viewport.x;
849
y += framebuffer.render_target->viewport.y;
851
/* Use fbblit_info to encapsulate rendering. */
852
source.mode_info = &bitmap->mode_info;
853
source.data = bitmap->data;
854
target.mode_info = &framebuffer.render_target->mode_info;
855
target.data = framebuffer.render_target->data;
857
/* Do actual blitting. */
858
common_blitter (&target, &source, oper, x, y, width, height,
861
return GRUB_ERR_NONE;
865
grub_video_fb_blit_render_target (struct grub_video_fbrender_target *source,
866
enum grub_video_blit_operators oper,
867
int x, int y, int offset_x, int offset_y,
868
unsigned int width, unsigned int height)
870
struct grub_video_fbblit_info source_info;
871
struct grub_video_fbblit_info target_info;
873
/* Make sure there is something to do. */
874
if ((width == 0) || (height == 0))
875
return GRUB_ERR_NONE;
876
if ((x >= (int)framebuffer.render_target->viewport.width) || (x + (int)width < 0))
877
return GRUB_ERR_NONE;
878
if ((y >= (int)framebuffer.render_target->viewport.height) || (y + (int)height < 0))
879
return GRUB_ERR_NONE;
880
if ((x + (int)source->mode_info.width) < 0)
881
return GRUB_ERR_NONE;
882
if ((y + (int)source->mode_info.height) < 0)
883
return GRUB_ERR_NONE;
884
if ((offset_x >= (int)source->mode_info.width)
885
|| (offset_x + (int)width < 0))
886
return GRUB_ERR_NONE;
887
if ((offset_y >= (int)source->mode_info.height)
888
|| (offset_y + (int)height < 0))
889
return GRUB_ERR_NONE;
891
/* If we have negative coordinates, optimize drawing to minimum. */
920
/* Do not allow drawing out of viewport. */
921
if ((x + width) > framebuffer.render_target->viewport.width)
922
width = framebuffer.render_target->viewport.width - x;
923
if ((y + height) > framebuffer.render_target->viewport.height)
924
height = framebuffer.render_target->viewport.height - y;
926
if ((offset_x + width) > source->mode_info.width)
927
width = source->mode_info.width - offset_x;
928
if ((offset_y + height) > source->mode_info.height)
929
height = source->mode_info.height - offset_y;
931
/* Limit drawing to source render target dimensions. */
932
if (width > source->mode_info.width)
933
width = source->mode_info.width;
935
if (height > source->mode_info.height)
936
height = source->mode_info.height;
938
/* Add viewport offset. */
939
x += framebuffer.render_target->viewport.x;
940
y += framebuffer.render_target->viewport.y;
942
/* Use fbblit_info to encapsulate rendering. */
943
source_info.mode_info = &source->mode_info;
944
source_info.data = source->data;
945
target_info.mode_info = &framebuffer.render_target->mode_info;
946
target_info.data = framebuffer.render_target->data;
948
/* Do actual blitting. */
949
common_blitter (&target_info, &source_info, oper, x, y, width, height,
952
return GRUB_ERR_NONE;
956
grub_video_fb_scroll (grub_video_color_t color, int dx, int dy)
965
/* 1. Check if we have something to do. */
966
if ((dx == 0) && (dy == 0))
967
return GRUB_ERR_NONE;
969
width = framebuffer.render_target->viewport.width - grub_abs (dx);
970
height = framebuffer.render_target->viewport.height - grub_abs (dy);
974
src_x = framebuffer.render_target->viewport.x - dx;
975
dst_x = framebuffer.render_target->viewport.x;
979
src_x = framebuffer.render_target->viewport.x;
980
dst_x = framebuffer.render_target->viewport.x + dx;
985
src_y = framebuffer.render_target->viewport.y - dy;
986
dst_y = framebuffer.render_target->viewport.y;
990
src_y = framebuffer.render_target->viewport.y;
991
dst_y = framebuffer.render_target->viewport.y + dy;
994
/* 2. Check if there is need to copy data. */
995
if ((grub_abs (dx) < framebuffer.render_target->viewport.width)
996
&& (grub_abs (dy) < framebuffer.render_target->viewport.height))
998
/* 3. Move data in render target. */
999
struct grub_video_fbblit_info target;
1001
int linedelta, linelen;
1003
target.mode_info = &framebuffer.render_target->mode_info;
1004
target.data = framebuffer.render_target->data;
1006
linedelta = target.mode_info->pitch
1007
- width * target.mode_info->bytes_per_pixel;
1008
linelen = width * target.mode_info->bytes_per_pixel;
1010
/* Check vertical direction of the move. */ \
1011
if (dy < 0 || (dy == 0 && dx < 0)) \
1013
dst = (void *) grub_video_fb_get_video_ptr (&target, \
1015
src = (void *) grub_video_fb_get_video_ptr (&target, \
1017
/* 3a. Move data upwards. */ \
1018
for (j = 0; j < height; j++) \
1020
for (i = 0; i < linelen; i++) \
1021
*(dst++) = *(src++); \
1028
/* 3b. Move data downwards. */ \
1029
dst = (void *) grub_video_fb_get_video_ptr (&target, \
1031
dst_y + height - 1); \
1032
src = (void *) grub_video_fb_get_video_ptr (&target, \
1034
src_y + height - 1); \
1037
for (j = 0; j < height; j++) \
1039
for (i = 0; i < linelen; i++) \
1040
*(dst--) = *(src--); \
1046
/* If everything is aligned on 32-bit use 32-bit copy. */
1047
if ((grub_addr_t) grub_video_fb_get_video_ptr (&target, src_x, src_y)
1048
% sizeof (grub_uint32_t) == 0
1049
&& (grub_addr_t) grub_video_fb_get_video_ptr (&target, dst_x, dst_y)
1050
% sizeof (grub_uint32_t) == 0
1051
&& linelen % sizeof (grub_uint32_t) == 0
1052
&& linedelta % sizeof (grub_uint32_t) == 0)
1054
grub_uint32_t *src, *dst;
1055
linelen /= sizeof (grub_uint32_t);
1056
linedelta /= sizeof (grub_uint32_t);
1059
/* If everything is aligned on 16-bit use 16-bit copy. */
1060
else if ((grub_addr_t) grub_video_fb_get_video_ptr (&target, src_x, src_y)
1061
% sizeof (grub_uint16_t) == 0
1062
&& (grub_addr_t) grub_video_fb_get_video_ptr (&target,
1064
% sizeof (grub_uint16_t) == 0
1065
&& linelen % sizeof (grub_uint16_t) == 0
1066
&& linedelta % sizeof (grub_uint16_t) == 0)
1068
grub_uint16_t *src, *dst;
1069
linelen /= sizeof (grub_uint16_t);
1070
linedelta /= sizeof (grub_uint16_t);
1073
/* If not aligned at all use 8-bit copy. */
1076
grub_uint8_t *src, *dst;
1081
/* 4. Fill empty space with specified color. In this implementation
1082
there might be colliding areas but at the moment there is no need
1083
to optimize this. */
1085
/* 4a. Fill top & bottom parts. */
1087
grub_video_fb_fill_rect (color, 0, 0, framebuffer.render_target->viewport.width, dy);
1090
if (framebuffer.render_target->viewport.height < grub_abs (dy))
1091
dy = -framebuffer.render_target->viewport.height;
1093
grub_video_fb_fill_rect (color, 0, framebuffer.render_target->viewport.height + dy,
1094
framebuffer.render_target->viewport.width, -dy);
1097
/* 4b. Fill left & right parts. */
1099
grub_video_fb_fill_rect (color, 0, 0,
1100
dx, framebuffer.render_target->viewport.height);
1103
if (framebuffer.render_target->viewport.width < grub_abs (dx))
1104
dx = -framebuffer.render_target->viewport.width;
1106
grub_video_fb_fill_rect (color, framebuffer.render_target->viewport.width + dx, 0,
1107
-dx, framebuffer.render_target->viewport.height);
1110
return GRUB_ERR_NONE;
1115
grub_video_fb_create_render_target (struct grub_video_fbrender_target **result,
1116
unsigned int width, unsigned int height,
1117
unsigned int mode_type __attribute__ ((unused)))
1119
struct grub_video_fbrender_target *target;
1122
/* Validate arguments. */
1126
return grub_error (GRUB_ERR_BAD_ARGUMENT,
1127
"invalid argument given");
1129
/* Allocate memory for render target. */
1130
target = grub_malloc (sizeof (struct grub_video_fbrender_target));
1134
/* TODO: Implement other types too.
1135
Currently only 32bit render targets are supported. */
1137
/* Mark render target as allocated. */
1138
target->is_allocated = 1;
1140
/* Maximize viewport. */
1141
target->viewport.x = 0;
1142
target->viewport.y = 0;
1143
target->viewport.width = width;
1144
target->viewport.height = height;
1146
/* Setup render target format. */
1147
target->mode_info.width = width;
1148
target->mode_info.height = height;
1149
target->mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB
1150
| GRUB_VIDEO_MODE_TYPE_ALPHA;
1151
target->mode_info.bpp = 32;
1152
target->mode_info.bytes_per_pixel = 4;
1153
target->mode_info.pitch = target->mode_info.bytes_per_pixel * width;
1154
target->mode_info.number_of_colors = framebuffer.palette_size; /* Emulated palette. */
1155
target->mode_info.red_mask_size = 8;
1156
target->mode_info.red_field_pos = 0;
1157
target->mode_info.green_mask_size = 8;
1158
target->mode_info.green_field_pos = 8;
1159
target->mode_info.blue_mask_size = 8;
1160
target->mode_info.blue_field_pos = 16;
1161
target->mode_info.reserved_mask_size = 8;
1162
target->mode_info.reserved_field_pos = 24;
1164
target->mode_info.blit_format = grub_video_get_blit_format (&target->mode_info);
1166
/* Calculate size needed for the data. */
1167
size = (width * target->mode_info.bytes_per_pixel) * height;
1169
target->data = grub_malloc (size);
1176
/* Clear render target with black and maximum transparency. */
1177
grub_memset (target->data, 0, size);
1179
/* TODO: Add render target to render target list. */
1181
/* Save result to caller. */
1184
return GRUB_ERR_NONE;
1188
grub_video_fb_create_render_target_from_pointer (struct grub_video_fbrender_target **result,
1189
const struct grub_video_mode_info *mode_info,
1192
struct grub_video_fbrender_target *target;
1195
/* Allocate memory for render target. */
1196
target = grub_malloc (sizeof (struct grub_video_fbrender_target));
1200
/* Mark framebuffer memory as non allocated. */
1201
target->is_allocated = 0;
1204
grub_memcpy (&(target->mode_info), mode_info, sizeof (target->mode_info));
1206
/* Reset viewport to match new mode. */
1207
target->viewport.x = 0;
1208
target->viewport.y = 0;
1209
target->viewport.width = mode_info->width;
1210
target->viewport.height = mode_info->height;
1212
/* Clear render target with black and maximum transparency. */
1213
for (y = 0; y < mode_info->height; y++)
1214
grub_memset (target->data + mode_info->pitch * y, 0,
1215
mode_info->bytes_per_pixel * mode_info->width);
1217
/* Save result to caller. */
1220
return GRUB_ERR_NONE;
1224
grub_video_fb_delete_render_target (struct grub_video_fbrender_target *target)
1226
/* If there is no target, then just return without error. */
1228
return GRUB_ERR_NONE;
1230
/* TODO: Delist render target from render target list. */
1232
/* If this is software render target, free it's memory. */
1233
if (target->is_allocated)
1234
grub_free (target->data);
1236
/* Free render target. */
1239
return GRUB_ERR_NONE;
1243
grub_video_fb_set_active_render_target (struct grub_video_fbrender_target *target)
1245
if (target == (struct grub_video_fbrender_target *)
1246
GRUB_VIDEO_RENDER_TARGET_DISPLAY)
1247
target = framebuffer.back_target;
1250
return grub_error (GRUB_ERR_BAD_ARGUMENT,
1251
"invalid render target given");
1253
framebuffer.render_target = target;
1255
return GRUB_ERR_NONE;
1259
grub_video_fb_get_active_render_target (struct grub_video_fbrender_target **target)
1261
*target = framebuffer.render_target;
1263
if (*target == framebuffer.back_target)
1264
*target = (struct grub_video_fbrender_target *) GRUB_VIDEO_RENDER_TARGET_DISPLAY;
1266
return GRUB_ERR_NONE;
1270
doublebuf_blit_update_screen (struct grub_video_fbrender_target *front,
1271
struct grub_video_fbrender_target *back)
1273
grub_memcpy (front->data, back->data,
1274
front->mode_info.pitch * front->mode_info.height);
1275
return GRUB_ERR_NONE;
1279
grub_video_fb_doublebuf_blit_init (struct grub_video_fbrender_target **front,
1280
struct grub_video_fbrender_target **back,
1281
struct grub_video_mode_info mode_info,
1285
int page_size = mode_info.pitch * mode_info.height;
1287
err = grub_video_fb_create_render_target_from_pointer (front, &mode_info,
1292
framebuffer.offscreen_buffer = grub_malloc (page_size);
1293
if (! framebuffer.offscreen_buffer)
1295
grub_video_fb_delete_render_target (*front);
1300
err = grub_video_fb_create_render_target_from_pointer (back, &mode_info,
1301
framebuffer.offscreen_buffer);
1305
grub_video_fb_delete_render_target (*front);
1306
grub_free (framebuffer.offscreen_buffer);
1307
framebuffer.offscreen_buffer = 0;
1311
(*back)->is_allocated = 1;
1313
framebuffer.update_screen = doublebuf_blit_update_screen;
1315
return GRUB_ERR_NONE;
1319
doublebuf_pageflipping_update_screen (struct grub_video_fbrender_target *front
1320
__attribute__ ((unused)),
1321
struct grub_video_fbrender_target *back
1322
__attribute__ ((unused)))
1324
int new_displayed_page;
1325
struct grub_video_fbrender_target *target;
1328
/* Swap the page numbers in the framebuffer struct. */
1329
new_displayed_page = framebuffer.render_page;
1330
framebuffer.render_page = framebuffer.displayed_page;
1331
framebuffer.displayed_page = new_displayed_page;
1333
err = framebuffer.set_page (framebuffer.displayed_page);
1336
/* Restore previous state. */
1337
framebuffer.render_page = framebuffer.displayed_page;
1338
framebuffer.displayed_page = new_displayed_page;
1342
target = framebuffer.back_target;
1343
framebuffer.back_target = framebuffer.front_target;
1344
framebuffer.front_target = target;
1346
if (framebuffer.front_target->mode_info.mode_type
1347
& GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP)
1348
grub_memcpy (framebuffer.back_target->data, framebuffer.front_target->data,
1349
framebuffer.back_target->mode_info.pitch
1350
* framebuffer.back_target->mode_info.height);
1352
err = grub_video_fb_get_active_render_target (&target);
1356
if (framebuffer.render_target == framebuffer.back_target)
1357
framebuffer.render_target = framebuffer.front_target;
1358
else if (framebuffer.render_target == framebuffer.front_target)
1359
framebuffer.render_target = framebuffer.back_target;
1365
doublebuf_pageflipping_init (struct grub_video_mode_info *mode_info,
1366
volatile void *page0_ptr,
1367
grub_video_fb_set_page_t set_page_in,
1368
volatile void *page1_ptr)
1372
framebuffer.displayed_page = 0;
1373
framebuffer.render_page = 1;
1375
framebuffer.update_screen = doublebuf_pageflipping_update_screen;
1377
err = grub_video_fb_create_render_target_from_pointer (&framebuffer.front_target,
1379
(void *) page0_ptr);
1383
err = grub_video_fb_create_render_target_from_pointer (&framebuffer.back_target,
1385
(void *) page1_ptr);
1388
grub_video_fb_delete_render_target (framebuffer.front_target);
1392
/* Set the framebuffer memory data pointer and display the right page. */
1393
err = set_page_in (framebuffer.displayed_page);
1396
grub_video_fb_delete_render_target (framebuffer.front_target);
1397
grub_video_fb_delete_render_target (framebuffer.back_target);
1400
framebuffer.set_page = set_page_in;
1402
return GRUB_ERR_NONE;
1405
/* Select the best double buffering mode available. */
1407
grub_video_fb_setup (unsigned int mode_type, unsigned int mode_mask,
1408
struct grub_video_mode_info *mode_info,
1409
volatile void *page0_ptr,
1410
grub_video_fb_set_page_t set_page_in,
1411
volatile void *page1_ptr)
1414
int updating_swap_needed;
1416
updating_swap_needed
1417
= grub_video_check_mode_flag (mode_type, mode_mask,
1418
GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP, 0);
1420
/* Do double buffering only if it's either requested or efficient. */
1421
if (set_page_in && grub_video_check_mode_flag (mode_type, mode_mask,
1422
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
1423
!updating_swap_needed))
1425
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
1426
if (updating_swap_needed)
1427
mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP;
1429
err = doublebuf_pageflipping_init (mode_info, page0_ptr,
1434
framebuffer.render_target = framebuffer.back_target;
1435
return GRUB_ERR_NONE;
1438
mode_info->mode_type &= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
1439
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
1441
grub_errno = GRUB_ERR_NONE;
1444
if (grub_video_check_mode_flag (mode_type, mode_mask,
1445
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
1448
mode_info->mode_type |= (GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
1449
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
1451
err = grub_video_fb_doublebuf_blit_init (&framebuffer.front_target,
1452
&framebuffer.back_target,
1454
(void *) page0_ptr);
1458
framebuffer.render_target = framebuffer.back_target;
1459
return GRUB_ERR_NONE;
1462
mode_info->mode_type &= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
1463
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
1465
grub_errno = GRUB_ERR_NONE;
1468
/* Fall back to no double buffering. */
1469
err = grub_video_fb_create_render_target_from_pointer (&framebuffer.front_target,
1471
(void *) page0_ptr);
1476
framebuffer.back_target = framebuffer.front_target;
1477
framebuffer.update_screen = 0;
1479
mode_info->mode_type &= ~GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
1481
framebuffer.render_target = framebuffer.back_target;
1483
return GRUB_ERR_NONE;
1488
grub_video_fb_swap_buffers (void)
1491
if (!framebuffer.update_screen)
1492
return GRUB_ERR_NONE;
1494
err = framebuffer.update_screen (framebuffer.front_target,
1495
framebuffer.back_target);
1499
return GRUB_ERR_NONE;
1503
grub_video_fb_get_info_and_fini (struct grub_video_mode_info *mode_info,
1506
grub_memcpy (mode_info, &(framebuffer.front_target->mode_info),
1507
sizeof (*mode_info));
1508
*framebuf = framebuffer.front_target->data;
1510
grub_video_fb_fini ();
1512
return GRUB_ERR_NONE;