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-rw-r--r--com32/lib/Makefile10
-rw-r--r--com32/lib/sys/vesa/background.c171
-rw-r--r--com32/lib/sys/vesa/drawtxt.c148
-rw-r--r--com32/lib/sys/vesa/initvesa.c156
-rw-r--r--com32/lib/sys/vesa/video.h29
5 files changed, 502 insertions, 12 deletions
diff --git a/com32/lib/Makefile b/com32/lib/Makefile
index 0f65852c..cfbeeb22 100644
--- a/com32/lib/Makefile
+++ b/com32/lib/Makefile
@@ -33,6 +33,9 @@ LIBOBJS = \
sys/null_read.o sys/null_write.o sys/serial_write.o \
sys/ansicon_write.o sys/ansiserial_write.o \
\
+ sys/vesa/initvesa.o sys/vesa/alphatbl.o sys/vesa/drawtxt.o \
+ sys/vesa/background.o \
+ \
pci/cfgtype.o \
pci/readb.o pci/readw.o pci/readl.o pci/readbios.o \
pci/writeb.o pci/writew.o pci/writel.o pci/writebios.o \
@@ -61,7 +64,7 @@ libcom32.a : $(LIBOBJS)
$(RANLIB) $@
tidy:
- rm -f *.o .*.d */*.o */.*.d
+ rm -f *.o .*.d */*.o */.*.d lib/sys/vesa/alphatbl.c
clean: tidy
rm -f *.a
@@ -75,4 +78,9 @@ install: all
-rm -rf $(INSTALLROOT)$(COM32DIR)/include
cp -r ../include $(INSTALLROOT)$(COM32DIR)
+sys/vesa/alphatbl.o: sys/vesa/alphatbl.c
+
+sys/vesa/alphatbl.c: sys/vesa/alphatbl.pl
+ $(PERL) $< > $@ || ( rm -f $@ ; exit 1 )
+
-include .*.d */.*.d
diff --git a/com32/lib/sys/vesa/background.c b/com32/lib/sys/vesa/background.c
new file mode 100644
index 00000000..7de2d5a4
--- /dev/null
+++ b/com32/lib/sys/vesa/background.c
@@ -0,0 +1,171 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2006 H. Peter Anvin - All Rights Reserved
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <stdio.h>
+#include <png.h>
+#include <com32.h>
+#include "vesa.h"
+#include "video.h"
+
+static void draw_background(void)
+{
+ uint32_t *outp = (uint32_t *)__vesa_info.mi.lfb_ptr;
+ uint32_t *inp = (uint32_t *)__vesacon_background;
+ size_t n = sizeof __vesacon_background;
+ uint32_t v;
+
+ while (n--) {
+ v = *inp++;
+ *outp++ = (__vesacon_alpha_tbl[(uint8_t)(v >> 16)][0] << 16)|
+ (__vesacon_alpha_tbl[(uint8_t)(v >> 8)][0] << 8)|
+ (__vesacon_alpha_tbl[(uint8_t)v][0]);
+ }
+}
+
+int vesacon_load_background(const char *filename)
+{
+ FILE *fp;
+ uint8_t header[8];
+ png_structp png_ptr = NULL;
+ png_infop info_ptr = NULL;
+ png_infop end_ptr = NULL;
+ png_color_16p image_background;
+ static const png_color_16 my_background = {0,0,0,0,0};
+ double gamma;
+ const double screen_gamma = 2.2;
+ png_bytep row_pointers[VIDEO_Y_SIZE];
+ int passes;
+ int i;
+ int rv = -1;
+
+ if (!filename) {
+ draw_background();
+ return 0;
+ }
+
+ fp = fopen(filename, "r");
+
+ if (!fp)
+ goto err;
+
+ png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
+ NULL, NULL, NULL);
+
+ info_ptr = png_create_info_struct(png_ptr);
+ end_ptr = png_create_info_struct(png_ptr);
+
+ if (fread(header, 1, 8, fp) != 8 || png_sig_cmp(header, 0, 8) ||
+ !png_ptr || !info_ptr || !end_ptr ||
+ setjmp(png_jmpbuf(png_ptr)))
+ goto err;
+
+ png_init_io(png_ptr, fp);
+ png_set_sig_bytes(png_ptr, 8);
+
+ png_set_user_limits(png_ptr, VIDEO_X_SIZE, VIDEO_Y_SIZE);
+
+ png_read_info(png_ptr, info_ptr);
+
+ /* Set the appropriate set of transformations. We need to end up
+ with 32-bit BGRA format, no more, no less. */
+
+ switch (info_ptr->color_type) {
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ png_set_gray_to_rgb(png_ptr);
+ /* fall through */
+
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ break;
+
+ case PNG_COLOR_TYPE_GRAY:
+ png_set_gray_to_rgb(png_ptr);
+ /* fall through */
+
+ case PNG_COLOR_TYPE_RGB:
+ if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
+ png_set_tRNS_to_alpha(png_ptr);
+ else
+ png_set_add_alpha(png_ptr, ~0, PNG_FILLER_AFTER);
+ break;
+
+ case PNG_COLOR_TYPE_PALETTE:
+ png_set_palette_to_rgb(png_ptr);
+ break;
+
+ default:
+ /* Huh? */
+ break;
+ }
+
+ png_set_bgr(png_ptr);
+
+ if (png_get_bKGD(png_ptr, info_ptr, &image_background))
+ png_set_background(png_ptr, image_background,
+ PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
+ else
+ png_set_background(png_ptr, &my_background,
+ PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+
+
+ if (info_ptr->bit_depth == 16)
+ png_set_strip_16(png_ptr);
+ else if (info_ptr->bit_depth < 8)
+ png_set_packing(png_ptr);
+
+ if (png_get_gAMA(png_ptr, info_ptr, &gamma))
+ png_set_gamma(png_ptr, screen_gamma, gamma);
+ else
+ png_set_gamma(png_ptr, screen_gamma, 0.45455);
+
+ /* Whew! Now we should get the stuff we want... */
+ for (i = 0; i < info_ptr->height; i++)
+ row_pointers[i] = (png_bytep *)__vesacon_background[i];
+
+ passes = png_set_interlace_handling(png_ptr);
+
+ for (i = 0; i < passes; i++)
+ png_read_rows(png_ptr, row_pointers, NULL, info_ptr->height);
+
+ /* This actually displays the stuff */
+ draw_background();
+
+ rv = 0;
+
+ err:
+ if (png_ptr)
+ png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
+ if (fp)
+ fclose(fp);
+ return rv;
+}
+
+int __vesacon_init_background(void)
+{
+ memset(__vesacon_background, 0, sizeof __vesacon_background);
+
+ /* The VESA BIOS has already cleared the screen */
+}
diff --git a/com32/lib/sys/vesa/drawtxt.c b/com32/lib/sys/vesa/drawtxt.c
new file mode 100644
index 00000000..67130631
--- /dev/null
+++ b/com32/lib/sys/vesa/drawtxt.c
@@ -0,0 +1,148 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2006 H. Peter Anvin - All Rights Reserved
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <inttypes.h>
+#include "vesa.h"
+#include "video.h"
+
+static void vesacon_update_characters(int row, int col, int nrows, int ncols)
+{
+ const int height = __vesacon_font_height;
+ const int width = FONT_WIDTH;
+ uint32_t *bgrowptr, *bgptr, *fbrowptr, *fbptr, bgval, bgxval;
+ int fr = 0, fg = 0, fb = 0;
+ int br = 0, bg = 0, bb = 0;
+ uint8_t r, g, b;
+ uint8_t chbits = 0, chxbits = 0, chsbits = 0;
+ int i, j, pixrow, pixsrow;
+ struct vesa_char *rowptr, *rowsptr, *cptr, *csptr;
+
+ bgrowptr = &__vesacon_background[row*height+VIDEO_BORDER][col*width+VIDEO_BORDER];
+ fbrowptr = ((uint32_t *)__vesa_info.mi.lfb_ptr)+
+ ((row*height+VIDEO_BORDER)*VIDEO_X_SIZE)+(col*width+VIDEO_BORDER);
+
+ /* Note that we keep a 1-character guard area around the real text area... */
+ rowptr = &__vesacon_text_display[(row+1)*(TEXT_PIXEL_COLS/FONT_WIDTH+2)+(col+1)];
+ rowsptr = rowptr - ((TEXT_PIXEL_COLS/FONT_WIDTH+2)+1);
+ pixrow = 0;
+ pixsrow = height-1;
+
+ for (i = height*nrows; i >= 0; i--) {
+ bgptr = bgrowptr;
+ fbptr = fbrowptr;
+
+ cptr = rowptr;
+ csptr = rowsptr;
+
+ chsbits = __vesacon_graphics_font[csptr->ch][pixsrow];
+ chsbits &= (csptr->sha & 0x02) ? 0xff : 0x00;
+ chsbits ^= (csptr->sha & 0x01) ? 0xff : 0x00;
+ chsbits <<= 7;
+ csptr++;
+
+ for (j = width*ncols; j >= 0; j--) {
+ chbits <<= 1;
+ chsbits <<= 1;
+ chxbits <<= 1;
+
+ switch (j % FONT_WIDTH) {
+ case 0:
+ chbits = __vesacon_graphics_font[cptr->ch][pixrow];
+ chxbits = chbits;
+ chxbits &= (cptr->sha & 0x02) ? 0xff : 0x00;
+ chxbits ^= (cptr->sha & 0x01) ? 0xff : 0x00;
+ fr = ((cptr->attr & 4) >> 1) + ((cptr->attr & 8) >> 3);
+ fg = ((cptr->attr & 2)) + ((cptr->attr & 8) >> 3);
+ fb = ((cptr->attr & 1) << 1) + ((cptr->attr & 8) >> 3);
+ br = ((cptr->attr & 0x40) >> 5) + ((cptr->attr & 0x80) >> 7);
+ bg = ((cptr->attr & 0x20) >> 4) + ((cptr->attr & 0x80) >> 7);
+ bb = ((cptr->attr & 0x10) >> 3) + ((cptr->attr & 0x80) >> 7);
+ cptr++;
+ break;
+ case FONT_WIDTH-1:
+ chsbits = __vesacon_graphics_font[csptr->ch][pixsrow];
+ chsbits &= (csptr->sha & 0x02) ? 0xff : 0x00;
+ chsbits ^= (csptr->sha & 0x01) ? 0xff : 0x00;
+ csptr++;
+ break;
+ default:
+ break;
+ }
+
+ bgval = *bgptr;
+ bgxval = bgptr[VIDEO_X_SIZE+1];
+ bgptr++;
+
+ if (chbits & 0x80) {
+ r = __vesacon_alpha_tbl[(uint8_t)(bgxval >> 16)][fr];
+ g = __vesacon_alpha_tbl[(uint8_t)(bgxval >> 8)][fg];
+ b = __vesacon_alpha_tbl[(uint8_t)bgxval][fb];
+ } else if ((chsbits & ~chxbits) & 0x80) {
+ r = __vesacon_alpha_tbl[(uint8_t)(bgval >> 16)][br] >> 2;
+ g = __vesacon_alpha_tbl[(uint8_t)(bgval >> 8)][bg] >> 2;
+ b = __vesacon_alpha_tbl[(uint8_t)bgval][bb] >> 2;
+ } else {
+ r = __vesacon_alpha_tbl[(uint8_t)(bgval >> 16)][br];
+ g = __vesacon_alpha_tbl[(uint8_t)(bgval >> 8)][bg];
+ b = __vesacon_alpha_tbl[(uint8_t)bgval][bb];
+ }
+
+ *fbptr++ = (r << 16)|(g << 8)|b;
+ }
+
+ bgrowptr += VIDEO_X_SIZE;
+ fbrowptr += VIDEO_X_SIZE;
+
+ if (++pixrow == height) {
+ rowptr += TEXT_PIXEL_COLS/FONT_WIDTH+2;
+ pixrow = 0;
+ }
+ if (++pixsrow == height) {
+ rowsptr += TEXT_PIXEL_COLS/FONT_WIDTH+2;
+ pixsrow = 0;
+ }
+ }
+}
+
+void vesacon_write_at(int row, int col, const char *str, uint8_t attr, int rev)
+{
+ int n = 0;
+ struct vesa_char *ptr = &__vesacon_text_display[(row+1)*(TEXT_PIXEL_COLS/FONT_WIDTH+2)+(col+1)];
+
+ while (*str) {
+ ptr->ch = *str;
+ ptr->attr = attr;
+ ptr->sha = rev;
+
+ n++;
+ str++;
+ ptr++;
+ }
+
+ vesacon_update_characters(row, col, 1, n);
+}
+
diff --git a/com32/lib/sys/vesa/initvesa.c b/com32/lib/sys/vesa/initvesa.c
index 43b34985..7d294270 100644
--- a/com32/lib/sys/vesa/initvesa.c
+++ b/com32/lib/sys/vesa/initvesa.c
@@ -35,15 +35,38 @@
#include <inttypes.h>
#include <com32.h>
#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
#include "vesa.h"
#include "video.h"
-struct vesa_general_info __vesa_general_info;
-struct vesa_mode_info __vesa_mode_info;
+struct vesa_info __vesa_info;
+struct vesa_char *__vesacon_text_display;
+
+int __vesacon_font_height;
uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
+
uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
-uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE];
+
+ssize_t __serial_write(void *fp, const void *buf, size_t count);
+
+static void debug(const char *str, ...)
+{
+ va_list va;
+ char buf[65536];
+ size_t len;
+
+ va_start(va, str);
+ len = vsnprintf(buf, sizeof buf, str, va);
+ va_end(va);
+
+ if (len >= sizeof buf)
+ len = sizeof buf - 1;
+
+ __serial_write(NULL, buf, len);
+}
static void unpack_font(uint8_t *dst, uint8_t *src, int height)
{
@@ -51,9 +74,9 @@ static void unpack_font(uint8_t *dst, uint8_t *src, int height)
for (i = 0; i < FONT_MAX_CHARS; i++) {
memcpy(dst, src, height);
- memset(dst+height, 0, 32-height);
+ memset(dst+height, 0, FONT_MAX_HEIGHT-height);
- dst += 32;
+ dst += FONT_MAX_HEIGHT;
src += height;
}
}
@@ -70,6 +93,8 @@ static int vesacon_set_mode(void)
gi = &((struct vesa_info *)__com32.cs_bounce)->gi;
mi = &((struct vesa_info *)__com32.cs_bounce)->mi;
+ debug("Hello, World!\r\n");
+
memset(&rm, 0, sizeof rm);
gi->signature = VBE2_MAGIC; /* Get VBE2 extended data */
@@ -87,12 +112,14 @@ static int vesacon_set_mode(void)
}
/* Search for a 640x480 32-bit linear frame buffer mode */
- mode_ptr = CVT_PTR(gi->video_mode_ptr);
+ mode_ptr = GET_PTR(gi->video_mode_ptr);
for(;;) {
if ((mode = *mode_ptr++) == 0xFFFF)
return 4; /* No mode found */
+ debug("Found mode: 0x%04x\r\n", mode);
+
rm.eax.w[0] = 0x4F01; /* Get SVGA mode information */
rm.ecx.w[0] = mode;
rm.edi.w[0] = OFFS(mi);
@@ -102,6 +129,11 @@ static int vesacon_set_mode(void)
/* Must be a supported mode */
if ( rm.eax.w[0] != 0x004f )
continue;
+
+ debug("mode_attr 0x%04x, h_res = %4d, v_res = %4d, bpp = %2d, layout = %d (%d,%d,%d)\r\n",
+ mi->mode_attr, mi->h_res, mi->v_res, mi->bpp, mi->memory_layout,
+ mi->rpos, mi->gpos, mi->bpos);
+
/* Must be an LFB color graphics mode supported by the hardware */
if ( (mi->mode_attr & 0x0099) != 0x0099 )
continue;
@@ -112,8 +144,8 @@ static int vesacon_set_mode(void)
/* Must either be a packed-pixel mode or a direct color mode
(depending on VESA version ) */
if ( mi->memory_layout != 4 && /* Packed pixel */
- (mi->memory_layout != 6 || mi->rpos != 24 ||
- mi->gpos != 16 || mi->bpos != 0) )
+ (mi->memory_layout != 6 || mi->rpos != 16 ||
+ mi->gpos != 8 || mi->bpos != 0) )
continue;
/* Hey, looks like we found something we can live with */
@@ -125,7 +157,8 @@ static int vesacon_set_mode(void)
rm.ebx.w[0] = 0x0600; /* Get 8x16 ROM font */
__intcall(0x10, &rm, &rm);
rom_font = MK_PTR(rm.es, rm.ebp.w[0]);
- unpack_font(graphics_font, rom_font, 16);
+ __vesacon_font_height = 16;
+ unpack_font((uint8_t *)__vesacon_graphics_font, rom_font, 16);
/* Now set video mode */
rm.eax.w[0] = 0x4F02; /* Set SVGA video mode */
@@ -143,7 +176,110 @@ static int vesacon_set_mode(void)
return 0;
}
+
+static int init_text_display(void)
+{
+ size_t nchars;
+ struct vesa_char *ptr;
+
+ nchars = (TEXT_PIXEL_ROWS/__vesacon_font_height+2)*
+ (TEXT_PIXEL_COLS/FONT_WIDTH+2);
+
+ __vesacon_text_display = ptr = malloc(nchars*sizeof(struct vesa_char));
+
+ if (!ptr)
+ return -1;
+
+ /* I really which C had a memset() for larger-than-bytes objects... */
+ asm volatile("cld; rep; stosl"
+ : "+D" (ptr), "+c" (nchars)
+ : "a" (' '+(0x07 << 8)+(SHADOW_NORMAL << 16))
+ : "memory");
+
+ return 0;
+}
+
int __vesacon_init(void)
{
- return vesacon_set_mode();
+ int i, j, r, g, b, n;
+ const int step = 8;
+
+ /* Fill the background image with a test pattern */
+ for (i = 0; i < VIDEO_Y_SIZE; i++) {
+ r = g = b = n = 0;
+
+ for (j = 0; j < VIDEO_X_SIZE; j++) {
+ switch (n) {
+ case 0:
+ r += step;
+ if (r >= 255) {
+ r = 255;
+ n++;
+ }
+ break;
+ case 1:
+ g += step;
+ if (g >= 255) {
+ g = 255;
+ n++;
+ }
+ break;
+ case 2:
+ r -= step;
+ if (r <= 0) {
+ r = 0;
+ n++;
+ }
+ break;
+ case 3:
+ b += step;
+ if (b >= 255) {
+ b = 255;
+ n++;
+ }
+ break;
+ case 4:
+ g -= step;
+ if (g <= 0) {
+ g = 0;
+ n++;
+ }
+ break;
+ case 5:
+ r += step;
+ if (r >= 255) {
+ r = 255;
+ n++;
+ }
+ break;
+ case 6:
+ g += step;
+ if (g >= 255) {
+ g = 255;
+ n++;
+ }
+ break;
+ case 7:
+ r -= step;
+ if (r < 0) {
+ r = 0;
+ n = 0;
+ }
+ g = b = r;
+ break;
+ }
+ __vesacon_background[i][j] = (r << 16) + (g << 8) + b;
+ }
+ }
+
+ vesacon_set_mode();
+
+ init_text_display();
+
+ debug("Mode set, now drawing at %#p\n", __vesa_info.mi.lfb_ptr);
+
+ __vesacon_init_background();
+
+ debug("Ready!\r\n");
+ return 0;
}
diff --git a/com32/lib/sys/vesa/video.h b/com32/lib/sys/vesa/video.h
index acbbc109..9237a85e 100644
--- a/com32/lib/sys/vesa/video.h
+++ b/com32/lib/sys/vesa/video.h
@@ -30,10 +30,37 @@
#define FONT_MAX_CHARS 256
#define FONT_MAX_HEIGHT 32
+#define FONT_WIDTH 8
#define VIDEO_X_SIZE 640
#define VIDEO_Y_SIZE 480
-extern uint8_t graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
+#define VIDEO_BORDER 8
+#define TEXT_PIXEL_ROWS (VIDEO_Y_SIZE-2*VIDEO_BORDER)
+#define TEXT_PIXEL_COLS (VIDEO_X_SIZE-2*VIDEO_BORDER)
+
+#define SHADOW_NONE 0
+#define SHADOW_ALL 1
+#define SHADOW_NORMAL 2
+#define SHADOW_REVERSE 3
+
+struct vesa_char {
+ uint8_t ch; /* Character */
+ uint8_t attr; /* PC-style graphics attribute */
+ uint8_t sha; /* Shadow attributes */
+ uint8_t pad; /* Currently unused */
+};
+
+extern struct vesa_char *__vesacon_text_display;
+
+extern int __vesacon_font_height;
+extern uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
+extern uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
+extern uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE];
+
+extern unsigned char __vesacon_alpha_tbl[256][4];
+
+extern int __vesacon_init_background(void);
+int vesacon_load_background(const char *);
#endif /* LIB_SYS_VESA_VIDEO_H */