456 lines
11 KiB
C
456 lines
11 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright 2006-2008 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 <tinyjpeg.h>
|
|
#include <com32.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <minmax.h>
|
|
#include <stdbool.h>
|
|
#include <ilog2.h>
|
|
#include <syslinux/loadfile.h>
|
|
#include "vesa.h"
|
|
#include "video.h"
|
|
|
|
/*** FIX: This really should be alpha-blended with color index 0 ***/
|
|
|
|
/* For best performance, "start" should be a multiple of 4, to assure
|
|
aligned dwords. */
|
|
static void draw_background_line(int line, int start, int npixels)
|
|
{
|
|
uint32_t *bgptr = &__vesacon_background[line*__vesa_info.mi.h_res+start];
|
|
unsigned int bytes_per_pixel = __vesacon_bytes_per_pixel;
|
|
size_t fbptr = line * __vesa_info.mi.logical_scan + start*bytes_per_pixel;
|
|
|
|
__vesacon_copy_to_screen(fbptr, bgptr, npixels);
|
|
}
|
|
|
|
/* This draws the border, then redraws the text area */
|
|
static void draw_background(void)
|
|
{
|
|
int i;
|
|
const int bottom_border = VIDEO_BORDER +
|
|
(TEXT_PIXEL_ROWS % __vesacon_font_height);
|
|
const int right_border = VIDEO_BORDER + (TEXT_PIXEL_COLS % FONT_WIDTH);
|
|
|
|
for (i = 0; i < VIDEO_BORDER; i++)
|
|
draw_background_line(i, 0, __vesa_info.mi.h_res);
|
|
|
|
for (i = VIDEO_BORDER; i < __vesa_info.mi.v_res - bottom_border; i++) {
|
|
draw_background_line(i, 0, VIDEO_BORDER);
|
|
draw_background_line(i, __vesa_info.mi.h_res - right_border,
|
|
right_border);
|
|
}
|
|
|
|
for (i = __vesa_info.mi.v_res - bottom_border;
|
|
i < __vesa_info.mi.v_res; i++)
|
|
draw_background_line(i, 0, __vesa_info.mi.h_res);
|
|
|
|
__vesacon_redraw_text();
|
|
}
|
|
|
|
/*
|
|
* Tile an image in the UL corner across the entire screen
|
|
*/
|
|
static void tile_image(int width, int height)
|
|
{
|
|
int xsize = __vesa_info.mi.h_res;
|
|
int ysize = __vesa_info.mi.v_res;
|
|
int x, y, yr;
|
|
int xl, yl;
|
|
uint32_t *sp, *dp, *drp, *dtp;
|
|
|
|
drp = __vesacon_background;
|
|
for (y = 0 ; y < ysize ; y += height) {
|
|
yl = min(height, ysize-y);
|
|
dtp = drp;
|
|
for (x = 0 ; x < xsize ; x += width) {
|
|
xl = min(width, xsize-x);
|
|
if (x || y) {
|
|
sp = __vesacon_background;
|
|
dp = dtp;
|
|
for (yr = 0 ; yr < yl ; yr++) {
|
|
memcpy(dp, sp, xl*sizeof(uint32_t));
|
|
dp += xsize;
|
|
sp += xsize;
|
|
}
|
|
}
|
|
dtp += xl;
|
|
}
|
|
drp += xsize*height;
|
|
}
|
|
}
|
|
|
|
static int read_png_file(FILE * fp)
|
|
{
|
|
png_structp png_ptr = NULL;
|
|
png_infop info_ptr = NULL;
|
|
#if 0
|
|
png_color_16p image_background;
|
|
static const png_color_16 my_background = { 0, 0, 0, 0, 0 };
|
|
#endif
|
|
png_bytep row_pointers[__vesa_info.mi.v_res], rp;
|
|
int i;
|
|
int rv = -1;
|
|
|
|
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
|
info_ptr = png_create_info_struct(png_ptr);
|
|
|
|
if (!png_ptr || !info_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, __vesa_info.mi.h_res, __vesa_info.mi.v_res);
|
|
|
|
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. */
|
|
|
|
/* Expand to RGB first... */
|
|
if (info_ptr->color_type & PNG_COLOR_MASK_PALETTE)
|
|
png_set_palette_to_rgb(png_ptr);
|
|
else if (!(info_ptr->color_type & PNG_COLOR_MASK_COLOR))
|
|
png_set_gray_to_rgb(png_ptr);
|
|
|
|
/* Add alpha channel, if need be */
|
|
if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA)) {
|
|
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);
|
|
}
|
|
|
|
/* Adjust the byte order, if necessary */
|
|
png_set_bgr(png_ptr);
|
|
|
|
/* Make sure we end up with 8-bit data */
|
|
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 0
|
|
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);
|
|
#endif
|
|
|
|
/* Whew! Now we should get the stuff we want... */
|
|
rp = (png_bytep)__vesacon_background;
|
|
for (i = 0; i < (int)info_ptr->height; i++) {
|
|
row_pointers[i] = rp;
|
|
rp += __vesa_info.mi.h_res << 2;
|
|
}
|
|
|
|
png_read_image(png_ptr, row_pointers);
|
|
|
|
tile_image(info_ptr->width, info_ptr->height);
|
|
|
|
rv = 0;
|
|
|
|
err:
|
|
if (png_ptr)
|
|
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
|
|
return rv;
|
|
}
|
|
|
|
static int jpeg_sig_cmp(uint8_t * bytes, int len)
|
|
{
|
|
(void)len;
|
|
|
|
return (bytes[0] == 0xff && bytes[1] == 0xd8) ? 0 : -1;
|
|
}
|
|
|
|
static int read_jpeg_file(FILE * fp, uint8_t * header, int len)
|
|
{
|
|
struct jdec_private *jdec = NULL;
|
|
void *jpeg_file = NULL;
|
|
size_t length_of_file;
|
|
unsigned int width, height;
|
|
int rv = -1;
|
|
unsigned char *components[1];
|
|
unsigned int bytes_per_row[1];
|
|
|
|
rv = floadfile(fp, &jpeg_file, &length_of_file, header, len);
|
|
if (rv)
|
|
goto err;
|
|
|
|
jdec = tinyjpeg_init();
|
|
if (!jdec)
|
|
goto err;
|
|
|
|
if (tinyjpeg_parse_header(jdec, jpeg_file, length_of_file) < 0)
|
|
goto err;
|
|
|
|
tinyjpeg_get_size(jdec, &width, &height);
|
|
if (width > __vesa_info.mi.h_res || height > __vesa_info.mi.v_res)
|
|
goto err;
|
|
|
|
components[0] = (void *)__vesacon_background;
|
|
tinyjpeg_set_components(jdec, components, 1);
|
|
bytes_per_row[0] = __vesa_info.mi.h_res << 2;
|
|
tinyjpeg_set_bytes_per_row(jdec, bytes_per_row, 1);
|
|
|
|
tinyjpeg_decode(jdec, TINYJPEG_FMT_BGRA32);
|
|
tile_image(width, height);
|
|
|
|
rv = 0;
|
|
|
|
err:
|
|
/* Don't use tinyjpeg_free() here, since we didn't allow tinyjpeg
|
|
to allocate the frame buffer */
|
|
if (jdec)
|
|
free(jdec);
|
|
|
|
if (jpeg_file)
|
|
free(jpeg_file);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* Simple grey Gaussian hole, enough to look interesting */
|
|
int vesacon_default_background(void)
|
|
{
|
|
int x, y, dx, dy, dy2;
|
|
int z;
|
|
unsigned int shft;
|
|
uint8_t *bgptr = (uint8_t *)__vesacon_background;
|
|
uint8_t k;
|
|
|
|
if (__vesacon_pixel_format == PXF_NONE)
|
|
return 0; /* Not in graphics mode */
|
|
|
|
z = max(__vesa_info.mi.v_res, __vesa_info.mi.h_res) >> 1;
|
|
z = ((z*z) >> 11) - 1;
|
|
shft = ilog2(z) + 1;
|
|
|
|
for (y = 0, dy = -(__vesa_info.mi.v_res >> 1);
|
|
y < __vesa_info.mi.v_res; y++, dy++) {
|
|
dy2 = dy * dy;
|
|
for (x = 0, dx = -(__vesa_info.mi.h_res >> 1);
|
|
x < __vesa_info.mi.h_res; x++, dx++) {
|
|
k = __vesacon_linear_to_srgb[500 + ((dx*dx + dy2) >> shft)];
|
|
bgptr[0] = k; /* Blue */
|
|
bgptr[1] = k; /* Green */
|
|
bgptr[2] = k; /* Red */
|
|
bgptr += 4; /* Dummy alpha */
|
|
}
|
|
}
|
|
|
|
draw_background();
|
|
return 0;
|
|
}
|
|
|
|
/* Set the background to a single flat color */
|
|
int vesacon_set_background(unsigned int rgb)
|
|
{
|
|
void *bgptr = __vesacon_background;
|
|
unsigned int count = __vesa_info.mi.h_res * __vesa_info.mi.v_res;
|
|
|
|
if (__vesacon_pixel_format == PXF_NONE)
|
|
return 0; /* Not in graphics mode */
|
|
|
|
asm volatile ("rep; stosl":"+D" (bgptr), "+c"(count)
|
|
:"a"(rgb)
|
|
:"memory");
|
|
|
|
draw_background();
|
|
return 0;
|
|
}
|
|
|
|
struct lss16_header {
|
|
uint32_t magic;
|
|
uint16_t xsize;
|
|
uint16_t ysize;
|
|
};
|
|
|
|
#define LSS16_MAGIC 0x1413f33d
|
|
|
|
static inline int lss16_sig_cmp(const void *header, int len)
|
|
{
|
|
const struct lss16_header *h = header;
|
|
|
|
if (len != 8)
|
|
return 1;
|
|
|
|
return !(h->magic == LSS16_MAGIC &&
|
|
h->xsize <= __vesa_info.mi.h_res &&
|
|
h->ysize <= __vesa_info.mi.v_res);
|
|
}
|
|
|
|
static int read_lss16_file(FILE * fp, const void *header, int header_len)
|
|
{
|
|
const struct lss16_header *h = header;
|
|
uint32_t colors[16], color;
|
|
bool has_nybble;
|
|
uint8_t byte;
|
|
int count;
|
|
int nybble, prev;
|
|
enum state {
|
|
st_start,
|
|
st_c0,
|
|
st_c1,
|
|
st_c2,
|
|
} state;
|
|
int i, x, y;
|
|
uint32_t *bgptr = __vesacon_background;
|
|
|
|
/* Assume the header, 8 bytes, has already been loaded. */
|
|
if (header_len != 8)
|
|
return -1;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
uint8_t rgb[3];
|
|
if (fread(rgb, 1, 3, fp) != 3)
|
|
return -1;
|
|
|
|
colors[i] = (((rgb[0] & 63) * 255 / 63) << 16) +
|
|
(((rgb[1] & 63) * 255 / 63) << 8) +
|
|
((rgb[2] & 63) * 255 / 63);
|
|
}
|
|
|
|
/* By spec, the state machine is per row */
|
|
for (y = 0; y < h->ysize; y++) {
|
|
state = st_start;
|
|
has_nybble = false;
|
|
color = colors[prev = 0]; /* By specification */
|
|
count = 0;
|
|
|
|
x = 0;
|
|
while (x < h->xsize) {
|
|
if (!has_nybble) {
|
|
if (fread(&byte, 1, 1, fp) != 1)
|
|
return -1;
|
|
nybble = byte & 0xf;
|
|
has_nybble = true;
|
|
} else {
|
|
nybble = byte >> 4;
|
|
has_nybble = false;
|
|
}
|
|
|
|
switch (state) {
|
|
case st_start:
|
|
if (nybble != prev) {
|
|
*bgptr++ = color = colors[prev = nybble];
|
|
x++;
|
|
} else {
|
|
state = st_c0;
|
|
}
|
|
break;
|
|
|
|
case st_c0:
|
|
if (nybble == 0) {
|
|
state = st_c1;
|
|
} else {
|
|
count = nybble;
|
|
goto do_run;
|
|
}
|
|
break;
|
|
|
|
case st_c1:
|
|
count = nybble + 16;
|
|
state = st_c2;
|
|
break;
|
|
|
|
case st_c2:
|
|
count += nybble << 4;
|
|
goto do_run;
|
|
|
|
do_run:
|
|
count = min(count, h->xsize - x);
|
|
x += count;
|
|
asm volatile ("rep; stosl":"+D" (bgptr),
|
|
"+c"(count):"a"(color));
|
|
state = st_start;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Zero-fill rest of row */
|
|
i = __vesa_info.mi.h_res - x;
|
|
asm volatile ("rep; stosl":"+D" (bgptr), "+c"(i):"a"(0):"memory");
|
|
}
|
|
|
|
/* Zero-fill rest of screen */
|
|
i = (__vesa_info.mi.v_res - y) * __vesa_info.mi.h_res;
|
|
asm volatile ("rep; stosl":"+D" (bgptr), "+c"(i):"a"(0):"memory");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vesacon_load_background(const char *filename)
|
|
{
|
|
FILE *fp = NULL;
|
|
uint8_t header[8];
|
|
int rv = 1;
|
|
|
|
if (__vesacon_pixel_format == PXF_NONE)
|
|
return 0; /* Not in graphics mode */
|
|
|
|
fp = fopen(filename, "r");
|
|
|
|
if (!fp)
|
|
goto err;
|
|
|
|
if (fread(header, 1, 8, fp) != 8)
|
|
goto err;
|
|
|
|
if (!png_sig_cmp(header, 0, 8)) {
|
|
rv = read_png_file(fp);
|
|
} else if (!jpeg_sig_cmp(header, 8)) {
|
|
rv = read_jpeg_file(fp, header, 8);
|
|
} else if (!lss16_sig_cmp(header, 8)) {
|
|
rv = read_lss16_file(fp, header, 8);
|
|
}
|
|
|
|
/* This actually displays the stuff */
|
|
draw_background();
|
|
|
|
err:
|
|
if (fp)
|
|
fclose(fp);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int __vesacon_init_background(void)
|
|
{
|
|
/* __vesacon_background was cleared by calloc() */
|
|
|
|
/* The VESA BIOS has already cleared the screen */
|
|
return 0;
|
|
}
|