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, 456 insertions, 0 deletions
diff --git a/contrib/syslinux/latest/com32/lib/sys/vesa/background.c b/contrib/syslinux/latest/com32/lib/sys/vesa/background.c new file mode 100644 index 0000000..9357746 --- /dev/null +++ b/contrib/syslinux/latest/com32/lib/sys/vesa/background.c @@ -0,0 +1,456 @@ +/* ----------------------------------------------------------------------- * + * + * 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; +} |