diff options
Diffstat (limited to 'contrib/syslinux/latest/com32/lib/sys/vesa/background.c')
-rw-r--r-- | contrib/syslinux/latest/com32/lib/sys/vesa/background.c | 456 |
1 files changed, 0 insertions, 456 deletions
diff --git a/contrib/syslinux/latest/com32/lib/sys/vesa/background.c b/contrib/syslinux/latest/com32/lib/sys/vesa/background.c deleted file mode 100644 index 9357746..0000000 --- a/contrib/syslinux/latest/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; -} |