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grub/grub-core/video/fb/video_fb.c
BVK Chaitanya 8c41176882 automake commit without merge history
2010-05-06 11:34:04 +05:30

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2006,2007,2008,2009 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/>.
*/
#include <grub/video.h>
#include <grub/video_fb.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/fbblit.h>
#include <grub/fbfill.h>
#include <grub/fbutil.h>
#include <grub/bitmap.h>
static struct grub_video_fbrender_target *render_target;
struct grub_video_palette_data *palette;
static unsigned int palette_size;
/* Specify "standard" VGA palette, some video cards may
need this and this will also be used when using RGB modes. */
struct grub_video_palette_data grub_video_fbstd_colors[GRUB_VIDEO_FBSTD_NUMCOLORS] =
{
// {R, G, B, A}
{0x00, 0x00, 0x00, 0xFF}, // 0 = black
{0x00, 0x00, 0xA8, 0xFF}, // 1 = blue
{0x00, 0xA8, 0x00, 0xFF}, // 2 = green
{0x00, 0xA8, 0xA8, 0xFF}, // 3 = cyan
{0xA8, 0x00, 0x00, 0xFF}, // 4 = red
{0xA8, 0x00, 0xA8, 0xFF}, // 5 = magenta
{0xA8, 0x54, 0x00, 0xFF}, // 6 = brown
{0xA8, 0xA8, 0xA8, 0xFF}, // 7 = light gray
{0x54, 0x54, 0x54, 0xFF}, // 8 = dark gray
{0x54, 0x54, 0xFE, 0xFF}, // 9 = bright blue
{0x54, 0xFE, 0x54, 0xFF}, // 10 = bright green
{0x54, 0xFE, 0xFE, 0xFF}, // 11 = bright cyan
{0xFE, 0x54, 0x54, 0xFF}, // 12 = bright red
{0xFE, 0x54, 0xFE, 0xFF}, // 13 = bright magenta
{0xFE, 0xFE, 0x54, 0xFF}, // 14 = yellow
{0xFE, 0xFE, 0xFE, 0xFF} // 15 = white
};
grub_err_t
grub_video_fb_init (void)
{
grub_free (palette);
render_target = 0;
palette = 0;
palette_size = 0;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_fini (void)
{
/* TODO: destroy render targets. */
grub_free (palette);
render_target = 0;
palette = 0;
palette_size = 0;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_get_info (struct grub_video_mode_info *mode_info)
{
/* Copy mode info from active render target. */
grub_memcpy (mode_info, &render_target->mode_info,
sizeof (struct grub_video_mode_info));
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_get_palette (unsigned int start, unsigned int count,
struct grub_video_palette_data *palette_data)
{
unsigned int i;
/* Assume that we know everything from index color palette. */
for (i = 0; (i < count) && ((i + start) < palette_size); i++)
palette_data[i] = palette[start + i];
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_set_palette (unsigned int start, unsigned int count,
struct grub_video_palette_data *palette_data)
{
unsigned i;
if (start + count > palette_size)
{
palette_size = start + count;
palette = grub_realloc (palette, sizeof (palette[0]) * palette_size);
if (!palette)
{
grub_video_fb_fini ();
return grub_errno;
}
}
for (i = 0; (i < count) && ((i + start) < palette_size); i++)
palette[start + i] = palette_data[i];
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_set_viewport (unsigned int x, unsigned int y,
unsigned int width, unsigned int height)
{
/* Make sure viewport is withing screen dimensions. If viewport was set
to be out of the region, mark its size as zero. */
if (x > render_target->mode_info.width)
{
x = 0;
width = 0;
}
if (y > render_target->mode_info.height)
{
y = 0;
height = 0;
}
if (x + width > render_target->mode_info.width)
width = render_target->mode_info.width - x;
if (y + height > render_target->mode_info.height)
height = render_target->mode_info.height - y;
render_target->viewport.x = x;
render_target->viewport.y = y;
render_target->viewport.width = width;
render_target->viewport.height = height;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_get_viewport (unsigned int *x, unsigned int *y,
unsigned int *width, unsigned int *height)
{
if (x) *x = render_target->viewport.x;
if (y) *y = render_target->viewport.y;
if (width) *width = render_target->viewport.width;
if (height) *height = render_target->viewport.height;
return GRUB_ERR_NONE;
}
/* Maps color name to target optimized color format. */
grub_video_color_t
grub_video_fb_map_color (grub_uint32_t color_name)
{
/* TODO: implement color theme mapping code. */
if (color_name < palette_size)
{
if ((render_target->mode_info.mode_type
& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
return color_name;
else
{
grub_video_color_t color;
color = grub_video_fb_map_rgb (palette[color_name].r,
palette[color_name].g,
palette[color_name].b);
return color;
}
}
return 0;
}
/* Maps RGB to target optimized color format. */
grub_video_color_t
grub_video_fb_map_rgb (grub_uint8_t red, grub_uint8_t green,
grub_uint8_t blue)
{
if ((render_target->mode_info.mode_type
& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
{
int minindex = 0;
int delta = 0;
int tmp;
int val;
unsigned i;
/* Find best matching color. */
for (i = 0; i < palette_size; i++)
{
val = palette[i].r - red;
tmp = val * val;
val = palette[i].g - green;
tmp += val * val;
val = palette[i].b - blue;
tmp += val * val;
if (i == 0)
delta = tmp;
if (tmp < delta)
{
delta = tmp;
minindex = i;
if (tmp == 0)
break;
}
}
return minindex;
}
else if ((render_target->mode_info.mode_type
& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
{
if (red == render_target->mode_info.fg_red
&& green == render_target->mode_info.fg_green
&& blue == render_target->mode_info.fg_blue)
return 1;
else
return 0;
}
else
{
grub_uint32_t value;
grub_uint8_t alpha = 255; /* Opaque color. */
red >>= 8 - render_target->mode_info.red_mask_size;
green >>= 8 - render_target->mode_info.green_mask_size;
blue >>= 8 - render_target->mode_info.blue_mask_size;
alpha >>= 8 - render_target->mode_info.reserved_mask_size;
value = red << render_target->mode_info.red_field_pos;
value |= green << render_target->mode_info.green_field_pos;
value |= blue << render_target->mode_info.blue_field_pos;
value |= alpha << render_target->mode_info.reserved_field_pos;
return value;
}
}
/* Maps RGBA to target optimized color format. */
grub_video_color_t
grub_video_fb_map_rgba (grub_uint8_t red, grub_uint8_t green,
grub_uint8_t blue, grub_uint8_t alpha)
{
if ((render_target->mode_info.mode_type
& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
/* No alpha available in index color modes, just use
same value as in only RGB modes. */
return grub_video_fb_map_rgb (red, green, blue);
else if ((render_target->mode_info.mode_type
& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
{
if (red == render_target->mode_info.fg_red
&& green == render_target->mode_info.fg_green
&& blue == render_target->mode_info.fg_blue
&& alpha == render_target->mode_info.fg_alpha)
return 1;
else
return 0;
}
else
{
grub_uint32_t value;
red >>= 8 - render_target->mode_info.red_mask_size;
green >>= 8 - render_target->mode_info.green_mask_size;
blue >>= 8 - render_target->mode_info.blue_mask_size;
alpha >>= 8 - render_target->mode_info.reserved_mask_size;
value = red << render_target->mode_info.red_field_pos;
value |= green << render_target->mode_info.green_field_pos;
value |= blue << render_target->mode_info.blue_field_pos;
value |= alpha << render_target->mode_info.reserved_field_pos;
return value;
}
}
/* Splits target optimized format to components. */
grub_err_t
grub_video_fb_unmap_color (grub_video_color_t color,
grub_uint8_t *red, grub_uint8_t *green,
grub_uint8_t *blue, grub_uint8_t *alpha)
{
struct grub_video_fbblit_info target_info;
target_info.mode_info = &render_target->mode_info;
target_info.data = render_target->data;
grub_video_fb_unmap_color_int (&target_info, color, red, green, blue, alpha);
return GRUB_ERR_NONE;
}
/* Splits color in source format to components. */
void
grub_video_fb_unmap_color_int (struct grub_video_fbblit_info * source,
grub_video_color_t color,
grub_uint8_t *red, grub_uint8_t *green,
grub_uint8_t *blue, grub_uint8_t *alpha)
{
struct grub_video_mode_info *mode_info;
mode_info = source->mode_info;
if ((mode_info->mode_type
& GRUB_VIDEO_MODE_TYPE_INDEX_COLOR) != 0)
{
/* If we have an out-of-bounds color, return transparent black. */
if (color > 255)
{
*red = 0;
*green = 0;
*blue = 0;
*alpha = 0;
return;
}
*red = palette[color].r;
*green = palette[color].g;
*blue = palette[color].b;
*alpha = palette[color].a;
return;
}
else if ((mode_info->mode_type
& GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP) != 0)
{
if (color & 1)
{
*red = mode_info->fg_red;
*green = mode_info->fg_green;
*blue = mode_info->fg_blue;
*alpha = mode_info->fg_alpha;
}
else
{
*red = mode_info->bg_red;
*green = mode_info->bg_green;
*blue = mode_info->bg_blue;
*alpha = mode_info->bg_alpha;
}
}
else
{
grub_uint32_t tmp;
/* Get red component. */
tmp = color >> mode_info->red_field_pos;
tmp &= (1 << mode_info->red_mask_size) - 1;
tmp <<= 8 - mode_info->red_mask_size;
tmp |= (1 << (8 - mode_info->red_mask_size)) - 1;
*red = tmp & 0xFF;
/* Get green component. */
tmp = color >> mode_info->green_field_pos;
tmp &= (1 << mode_info->green_mask_size) - 1;
tmp <<= 8 - mode_info->green_mask_size;
tmp |= (1 << (8 - mode_info->green_mask_size)) - 1;
*green = tmp & 0xFF;
/* Get blue component. */
tmp = color >> mode_info->blue_field_pos;
tmp &= (1 << mode_info->blue_mask_size) - 1;
tmp <<= 8 - mode_info->blue_mask_size;
tmp |= (1 << (8 - mode_info->blue_mask_size)) - 1;
*blue = tmp & 0xFF;
/* Get alpha component. */
if (source->mode_info->reserved_mask_size > 0)
{
tmp = color >> mode_info->reserved_field_pos;
tmp &= (1 << mode_info->reserved_mask_size) - 1;
tmp <<= 8 - mode_info->reserved_mask_size;
tmp |= (1 << (8 - mode_info->reserved_mask_size)) - 1;
}
else
/* If there is no alpha component, assume it opaque. */
tmp = 255;
*alpha = tmp & 0xFF;
}
}
grub_err_t
grub_video_fb_fill_rect (grub_video_color_t color, int x, int y,
unsigned int width, unsigned int height)
{
struct grub_video_fbblit_info target;
/* Make sure there is something to do. */
if ((x >= (int)render_target->viewport.width) || (x + (int)width < 0))
return GRUB_ERR_NONE;
if ((y >= (int)render_target->viewport.height) || (y + (int)height < 0))
return GRUB_ERR_NONE;
/* Do not allow drawing out of viewport. */
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if ((x + width) > render_target->viewport.width)
width = render_target->viewport.width - x;
if ((y + height) > render_target->viewport.height)
height = render_target->viewport.height - y;
/* Add viewport offset. */
x += render_target->viewport.x;
y += render_target->viewport.y;
/* Use fbblit_info to encapsulate rendering. */
target.mode_info = &render_target->mode_info;
target.data = render_target->data;
/* Try to figure out more optimized version. Note that color is already
mapped to target format so we can make assumptions based on that. */
if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbfill_direct32 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbfill_direct32 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbfill_direct24 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_565)
{
grub_video_fbfill_direct16 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_565)
{
grub_video_fbfill_direct16 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
else if (target.mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbfill_direct8 (&target, color, x, y,
width, height);
return GRUB_ERR_NONE;
}
/* No optimized version found, use default (slow) filler. */
grub_video_fbfill (&target, color, x, y, width, height);
return GRUB_ERR_NONE;
}
/* NOTE: This function assumes that given coordinates are within bounds of
handled data. */
static void
common_blitter (struct grub_video_fbblit_info *target,
struct grub_video_fbblit_info *source,
enum grub_video_blit_operators oper, int x, int y,
unsigned int width, unsigned int height,
int offset_x, int offset_y)
{
if (oper == GRUB_VIDEO_BLIT_REPLACE)
{
/* Try to figure out more optimized version for replace operator. */
if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbblit_replace_directN (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbblit_replace_BGRX8888_RGBX8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
{
grub_video_fbblit_replace_BGR888_RGBX8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbblit_replace_RGB888_RGBX8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbblit_replace_index_RGBX8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbblit_replace_BGRX8888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbblit_replace_RGBX8888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
{
grub_video_fbblit_replace_BGR888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbblit_replace_directN (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbblit_replace_index_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbblit_replace_directN (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbblit_replace_directN (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED)
{
if (target->mode_info->bpp == 32)
{
grub_video_fbblit_replace_32bit_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->bpp == 24)
{
grub_video_fbblit_replace_24bit_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->bpp == 16)
{
grub_video_fbblit_replace_16bit_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->bpp == 8)
{
grub_video_fbblit_replace_8bit_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
/* No optimized replace operator found, use default (slow) blitter. */
grub_video_fbblit_replace (target, source, x, y, width, height,
offset_x, offset_y);
}
else
{
/* Try to figure out more optimized blend operator. */
if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbblit_blend_BGRA8888_RGBA8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbblit_blend_RGBA8888_RGBA8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
{
grub_video_fbblit_blend_BGR888_RGBA8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbblit_blend_RGB888_RGBA8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbblit_blend_index_RGBA8888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
/* Note: There is really no alpha information here, so blend is
changed to replace. */
if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGRA_8888)
{
grub_video_fbblit_replace_BGRX8888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbblit_replace_RGBX8888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_BGR_888)
{
grub_video_fbblit_replace_BGR888_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbblit_replace_directN (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR)
{
grub_video_fbblit_replace_index_RGB888 (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
else if (source->mode_info->blit_format == GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED)
{
if (target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_BGRA_8888
|| target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_RGBA_8888)
{
grub_video_fbblit_blend_XXXA8888_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_BGR_888
|| target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_RGB_888)
{
grub_video_fbblit_blend_XXX888_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
else if (target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_BGR_565
|| target->mode_info->blit_format
== GRUB_VIDEO_BLIT_FORMAT_RGB_565)
{
grub_video_fbblit_blend_XXX565_1bit (target, source,
x, y, width, height,
offset_x, offset_y);
return;
}
}
/* No optimized blend operation found, use default (slow) blitter. */
grub_video_fbblit_blend (target, source, x, y, width, height,
offset_x, offset_y);
}
}
grub_err_t
grub_video_fb_blit_bitmap (struct grub_video_bitmap *bitmap,
enum grub_video_blit_operators oper, int x, int y,
int offset_x, int offset_y,
unsigned int width, unsigned int height)
{
struct grub_video_fbblit_info source;
struct grub_video_fbblit_info target;
/* Make sure there is something to do. */
if ((width == 0) || (height == 0))
return GRUB_ERR_NONE;
if ((x >= (int)render_target->viewport.width) || (x + (int)width < 0))
return GRUB_ERR_NONE;
if ((y >= (int)render_target->viewport.height) || (y + (int)height < 0))
return GRUB_ERR_NONE;
if ((x + (int)bitmap->mode_info.width) < 0)
return GRUB_ERR_NONE;
if ((y + (int)bitmap->mode_info.height) < 0)
return GRUB_ERR_NONE;
if ((offset_x >= (int)bitmap->mode_info.width)
|| (offset_x + (int)width < 0))
return GRUB_ERR_NONE;
if ((offset_y >= (int)bitmap->mode_info.height)
|| (offset_y + (int)height < 0))
return GRUB_ERR_NONE;
/* If we have negative coordinates, optimize drawing to minimum. */
if (offset_x < 0)
{
width += offset_x;
x -= offset_x;
offset_x = 0;
}
if (offset_y < 0)
{
height += offset_y;
y -= offset_y;
offset_y = 0;
}
if (x < 0)
{
width += x;
offset_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
offset_y -= y;
y = 0;
}
/* Do not allow drawing out of viewport. */
if ((x + width) > render_target->viewport.width)
width = render_target->viewport.width - x;
if ((y + height) > render_target->viewport.height)
height = render_target->viewport.height - y;
if ((offset_x + width) > bitmap->mode_info.width)
width = bitmap->mode_info.width - offset_x;
if ((offset_y + height) > bitmap->mode_info.height)
height = bitmap->mode_info.height - offset_y;
/* Limit drawing to source render target dimensions. */
if (width > bitmap->mode_info.width)
width = bitmap->mode_info.width;
if (height > bitmap->mode_info.height)
height = bitmap->mode_info.height;
/* Add viewport offset. */
x += render_target->viewport.x;
y += render_target->viewport.y;
/* Use fbblit_info to encapsulate rendering. */
source.mode_info = &bitmap->mode_info;
source.data = bitmap->data;
target.mode_info = &render_target->mode_info;
target.data = render_target->data;
/* Do actual blitting. */
common_blitter (&target, &source, oper, x, y, width, height,
offset_x, offset_y);
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_blit_render_target (struct grub_video_fbrender_target *source,
enum grub_video_blit_operators oper,
int x, int y, int offset_x, int offset_y,
unsigned int width, unsigned int height)
{
struct grub_video_fbblit_info source_info;
struct grub_video_fbblit_info target_info;
/* Make sure there is something to do. */
if ((width == 0) || (height == 0))
return GRUB_ERR_NONE;
if ((x >= (int)render_target->viewport.width) || (x + (int)width < 0))
return GRUB_ERR_NONE;
if ((y >= (int)render_target->viewport.height) || (y + (int)height < 0))
return GRUB_ERR_NONE;
if ((x + (int)source->mode_info.width) < 0)
return GRUB_ERR_NONE;
if ((y + (int)source->mode_info.height) < 0)
return GRUB_ERR_NONE;
if ((offset_x >= (int)source->mode_info.width)
|| (offset_x + (int)width < 0))
return GRUB_ERR_NONE;
if ((offset_y >= (int)source->mode_info.height)
|| (offset_y + (int)height < 0))
return GRUB_ERR_NONE;
/* If we have negative coordinates, optimize drawing to minimum. */
if (offset_x < 0)
{
width += offset_x;
x -= offset_x;
offset_x = 0;
}
if (offset_y < 0)
{
height += offset_y;
y -= offset_y;
offset_y = 0;
}
if (x < 0)
{
width += x;
offset_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
offset_y -= y;
y = 0;
}
/* Do not allow drawing out of viewport. */
if ((x + width) > render_target->viewport.width)
width = render_target->viewport.width - x;
if ((y + height) > render_target->viewport.height)
height = render_target->viewport.height - y;
if ((offset_x + width) > source->mode_info.width)
width = source->mode_info.width - offset_x;
if ((offset_y + height) > source->mode_info.height)
height = source->mode_info.height - offset_y;
/* Limit drawing to source render target dimensions. */
if (width > source->mode_info.width)
width = source->mode_info.width;
if (height > source->mode_info.height)
height = source->mode_info.height;
/* Add viewport offset. */
x += render_target->viewport.x;
y += render_target->viewport.y;
/* Use fbblit_info to encapsulate rendering. */
source_info.mode_info = &source->mode_info;
source_info.data = source->data;
target_info.mode_info = &render_target->mode_info;
target_info.data = render_target->data;
/* Do actual blitting. */
common_blitter (&target_info, &source_info, oper, x, y, width, height,
offset_x, offset_y);
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_scroll (grub_video_color_t color, int dx, int dy)
{
int width;
int height;
int src_x;
int src_y;
int dst_x;
int dst_y;
/* 1. Check if we have something to do. */
if ((dx == 0) && (dy == 0))
return GRUB_ERR_NONE;
width = render_target->viewport.width - grub_abs (dx);
height = render_target->viewport.height - grub_abs (dy);
if (dx < 0)
{
src_x = render_target->viewport.x - dx;
dst_x = render_target->viewport.x;
}
else
{
src_x = render_target->viewport.x;
dst_x = render_target->viewport.x + dx;
}
if (dy < 0)
{
src_y = render_target->viewport.y - dy;
dst_y = render_target->viewport.y;
}
else
{
src_y = render_target->viewport.y;
dst_y = render_target->viewport.y + dy;
}
/* 2. Check if there is need to copy data. */
if ((grub_abs (dx) < render_target->viewport.width)
&& (grub_abs (dy) < render_target->viewport.height))
{
/* 3. Move data in render target. */
struct grub_video_fbblit_info target;
int i, j;
int linedelta, linelen;
target.mode_info = &render_target->mode_info;
target.data = render_target->data;
linedelta = target.mode_info->pitch
- width * target.mode_info->bytes_per_pixel;
linelen = width * target.mode_info->bytes_per_pixel;
#define DO_SCROLL \
/* Check vertical direction of the move. */ \
if (dy < 0 || (dy == 0 && dx < 0)) \
{ \
dst = (void *) grub_video_fb_get_video_ptr (&target, \
dst_x, dst_y); \
src = (void *) grub_video_fb_get_video_ptr (&target, \
src_x, src_y); \
/* 3a. Move data upwards. */ \
for (j = 0; j < height; j++) \
{ \
for (i = 0; i < linelen; i++) \
*(dst++) = *(src++); \
dst += linedelta; \
src += linedelta; \
} \
} \
else \
{ \
/* 3b. Move data downwards. */ \
dst = (void *) grub_video_fb_get_video_ptr (&target, \
dst_x + width, \
dst_y + height - 1); \
src = (void *) grub_video_fb_get_video_ptr (&target, \
src_x + width, \
src_y + height - 1); \
dst--; \
src--; \
for (j = 0; j < height; j++) \
{ \
for (i = 0; i < linelen; i++) \
*(dst--) = *(src--); \
dst -= linedelta; \
src -= linedelta; \
} \
}
/* If everything is aligned on 32-bit use 32-bit copy. */
if ((grub_addr_t) grub_video_fb_get_video_ptr (&target, src_x, src_y)
% sizeof (grub_uint32_t) == 0
&& (grub_addr_t) grub_video_fb_get_video_ptr (&target, dst_x, dst_y)
% sizeof (grub_uint32_t) == 0
&& linelen % sizeof (grub_uint32_t) == 0
&& linedelta % sizeof (grub_uint32_t) == 0)
{
grub_uint32_t *src, *dst;
linelen /= sizeof (grub_uint32_t);
linedelta /= sizeof (grub_uint32_t);
DO_SCROLL
}
/* If everything is aligned on 16-bit use 16-bit copy. */
else if ((grub_addr_t) grub_video_fb_get_video_ptr (&target, src_x, src_y)
% sizeof (grub_uint16_t) == 0
&& (grub_addr_t) grub_video_fb_get_video_ptr (&target,
dst_x, dst_y)
% sizeof (grub_uint16_t) == 0
&& linelen % sizeof (grub_uint16_t) == 0
&& linedelta % sizeof (grub_uint16_t) == 0)
{
grub_uint16_t *src, *dst;
linelen /= sizeof (grub_uint16_t);
linedelta /= sizeof (grub_uint16_t);
DO_SCROLL
}
/* If not aligned at all use 8-bit copy. */
else
{
grub_uint8_t *src, *dst;
DO_SCROLL
}
}
/* 4. Fill empty space with specified color. In this implementation
there might be colliding areas but at the moment there is no need
to optimize this. */
/* 4a. Fill top & bottom parts. */
if (dy > 0)
grub_video_fb_fill_rect (color, 0, 0, render_target->viewport.width, dy);
else if (dy < 0)
{
if (render_target->viewport.height < grub_abs (dy))
dy = -render_target->viewport.height;
grub_video_fb_fill_rect (color, 0, render_target->viewport.height + dy,
render_target->viewport.width, -dy);
}
/* 4b. Fill left & right parts. */
if (dx > 0)
grub_video_fb_fill_rect (color, 0, 0,
dx, render_target->viewport.height);
else if (dx < 0)
{
if (render_target->viewport.width < grub_abs (dx))
dx = -render_target->viewport.width;
grub_video_fb_fill_rect (color, render_target->viewport.width + dx, 0,
-dx, render_target->viewport.height);
}
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_create_render_target (struct grub_video_fbrender_target **result,
unsigned int width, unsigned int height,
unsigned int mode_type __attribute__ ((unused)))
{
struct grub_video_fbrender_target *target;
unsigned int size;
/* Validate arguments. */
if ((! result)
|| (width == 0)
|| (height == 0))
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"invalid argument given");
/* Allocate memory for render target. */
target = grub_malloc (sizeof (struct grub_video_fbrender_target));
if (! target)
return grub_errno;
/* TODO: Implement other types too.
Currently only 32bit render targets are supported. */
/* Mark render target as allocated. */
target->is_allocated = 1;
/* Maximize viewport. */
target->viewport.x = 0;
target->viewport.y = 0;
target->viewport.width = width;
target->viewport.height = height;
/* Setup render target format. */
target->mode_info.width = width;
target->mode_info.height = height;
target->mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB
| GRUB_VIDEO_MODE_TYPE_ALPHA;
target->mode_info.bpp = 32;
target->mode_info.bytes_per_pixel = 4;
target->mode_info.pitch = target->mode_info.bytes_per_pixel * width;
target->mode_info.number_of_colors = palette_size; /* Emulated palette. */
target->mode_info.red_mask_size = 8;
target->mode_info.red_field_pos = 0;
target->mode_info.green_mask_size = 8;
target->mode_info.green_field_pos = 8;
target->mode_info.blue_mask_size = 8;
target->mode_info.blue_field_pos = 16;
target->mode_info.reserved_mask_size = 8;
target->mode_info.reserved_field_pos = 24;
target->mode_info.blit_format = grub_video_get_blit_format (&target->mode_info);
/* Calculate size needed for the data. */
size = (width * target->mode_info.bytes_per_pixel) * height;
target->data = grub_malloc (size);
if (! target->data)
{
grub_free (target);
return grub_errno;
}
/* Clear render target with black and maximum transparency. */
grub_memset (target->data, 0, size);
/* TODO: Add render target to render target list. */
/* Save result to caller. */
*result = target;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_create_render_target_from_pointer (struct grub_video_fbrender_target **result,
const struct grub_video_mode_info *mode_info,
void *ptr)
{
struct grub_video_fbrender_target *target;
unsigned y;
/* Allocate memory for render target. */
target = grub_malloc (sizeof (struct grub_video_fbrender_target));
if (! target)
return grub_errno;
/* Mark framebuffer memory as non allocated. */
target->is_allocated = 0;
target->data = ptr;
grub_memcpy (&(target->mode_info), mode_info, sizeof (target->mode_info));
/* Reset viewport to match new mode. */
target->viewport.x = 0;
target->viewport.y = 0;
target->viewport.width = mode_info->width;
target->viewport.height = mode_info->height;
/* Clear render target with black and maximum transparency. */
for (y = 0; y < mode_info->height; y++)
grub_memset (target->data + mode_info->pitch * y, 0,
mode_info->bytes_per_pixel * mode_info->width);
/* Save result to caller. */
*result = target;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_delete_render_target (struct grub_video_fbrender_target *target)
{
/* If there is no target, then just return without error. */
if (! target)
return GRUB_ERR_NONE;
/* TODO: Delist render target from render target list. */
/* If this is software render target, free it's memory. */
if (target->is_allocated)
grub_free (target->data);
/* Free render target. */
grub_free (target);
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_set_active_render_target (struct grub_video_fbrender_target *target)
{
if (! target->data)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"invalid render target given");
render_target = target;
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_get_active_render_target (struct grub_video_fbrender_target **target)
{
*target = render_target;
return GRUB_ERR_NONE;
}
static grub_err_t
doublebuf_blit_update_screen (struct grub_video_fbrender_target *front,
struct grub_video_fbrender_target *back)
{
grub_memcpy (front->data, back->data,
front->mode_info.pitch * front->mode_info.height);
return GRUB_ERR_NONE;
}
grub_err_t
grub_video_fb_doublebuf_blit_init (struct grub_video_fbrender_target **front,
struct grub_video_fbrender_target **back,
grub_video_fb_doublebuf_update_screen_t *update_screen,
struct grub_video_mode_info mode_info,
void *framebuf)
{
grub_err_t err;
int page_size = mode_info.pitch * mode_info.height;
void *offscreen_buffer;
err = grub_video_fb_create_render_target_from_pointer (front, &mode_info,
framebuf);
if (err)
return err;
offscreen_buffer = grub_malloc (page_size);
if (! offscreen_buffer)
{
grub_video_fb_delete_render_target (*front);
*front = 0;
return grub_errno;
}
err = grub_video_fb_create_render_target_from_pointer (back, &mode_info,
offscreen_buffer);
if (err)
{
grub_video_fb_delete_render_target (*front);
grub_free (offscreen_buffer);
*front = 0;
return grub_errno;
}
(*back)->is_allocated = 1;
*update_screen = doublebuf_blit_update_screen;
return GRUB_ERR_NONE;
}
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