| /* ----------------------------------------------------------------------- * |
| * |
| * 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; |
| } |