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Diffstat (limited to 'contrib/syslinux/syslinux-4.03/com32/lib/sys/vesa/background.c')
-rw-r--r--contrib/syslinux/syslinux-4.03/com32/lib/sys/vesa/background.c456
1 files changed, 0 insertions, 456 deletions
diff --git a/contrib/syslinux/syslinux-4.03/com32/lib/sys/vesa/background.c b/contrib/syslinux/syslinux-4.03/com32/lib/sys/vesa/background.c
deleted file mode 100644
index 9357746..0000000
--- a/contrib/syslinux/syslinux-4.03/com32/lib/sys/vesa/background.c
+++ /dev/null
@@ -1,456 +0,0 @@
-/* ----------------------------------------------------------------------- *
- *
- * 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);
- fclose(fp);
- 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;
-}
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