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Diffstat (limited to 'contrib/syslinux-4.02/com32/lib/sys/vesa/background.c')
-rw-r--r--contrib/syslinux-4.02/com32/lib/sys/vesa/background.c456
1 files changed, 456 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/vesa/background.c b/contrib/syslinux-4.02/com32/lib/sys/vesa/background.c
new file mode 100644
index 0000000..9357746
--- /dev/null
+++ b/contrib/syslinux-4.02/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;
+}
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