362 lines
8.2 KiB
C
362 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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*/
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#include <common.h>
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#include <bmp_layout.h>
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#include <dm.h>
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#include <log.h>
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#include <mapmem.h>
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#include <splash.h>
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#include <video.h>
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#include <watchdog.h>
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#include <asm/unaligned.h>
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#ifdef CONFIG_VIDEO_BMP_RLE8
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#define BMP_RLE8_ESCAPE 0
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#define BMP_RLE8_EOL 0
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#define BMP_RLE8_EOBMP 1
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#define BMP_RLE8_DELTA 2
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static void draw_unencoded_bitmap(ushort **fbp, uchar *bmap, ushort *cmap,
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int cnt)
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{
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while (cnt > 0) {
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*(*fbp)++ = cmap[*bmap++];
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cnt--;
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}
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}
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static void draw_encoded_bitmap(ushort **fbp, ushort col, int cnt)
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{
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ushort *fb = *fbp;
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while (cnt > 0) {
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*fb++ = col;
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cnt--;
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}
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*fbp = fb;
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}
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static void video_display_rle8_bitmap(struct udevice *dev,
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struct bmp_image *bmp, ushort *cmap,
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uchar *fb, int x_off, int y_off,
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ulong width, ulong height)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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uchar *bmap;
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ulong cnt, runlen;
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int x, y;
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int decode = 1;
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debug("%s\n", __func__);
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bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);
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x = 0;
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y = height - 1;
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while (decode) {
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if (bmap[0] == BMP_RLE8_ESCAPE) {
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switch (bmap[1]) {
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case BMP_RLE8_EOL:
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/* end of line */
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bmap += 2;
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x = 0;
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y--;
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/* 16bpix, 2-byte per pixel, width should *2 */
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fb -= (width * 2 + priv->line_length);
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break;
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case BMP_RLE8_EOBMP:
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/* end of bitmap */
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decode = 0;
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break;
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case BMP_RLE8_DELTA:
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/* delta run */
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x += bmap[2];
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y -= bmap[3];
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/* 16bpix, 2-byte per pixel, x should *2 */
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fb = (uchar *)(priv->fb + (y + y_off - 1)
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* priv->line_length + (x + x_off) * 2);
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bmap += 4;
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break;
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default:
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/* unencoded run */
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runlen = bmap[1];
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bmap += 2;
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if (y < height) {
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if (x < width) {
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if (x + runlen > width)
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cnt = width - x;
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else
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cnt = runlen;
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draw_unencoded_bitmap(
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(ushort **)&fb,
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bmap, cmap, cnt);
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}
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x += runlen;
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}
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bmap += runlen;
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if (runlen & 1)
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bmap++;
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}
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} else {
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/* encoded run */
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if (y < height) {
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runlen = bmap[0];
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if (x < width) {
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/* aggregate the same code */
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while (bmap[0] == 0xff &&
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bmap[2] != BMP_RLE8_ESCAPE &&
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bmap[1] == bmap[3]) {
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runlen += bmap[2];
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bmap += 2;
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}
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if (x + runlen > width)
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cnt = width - x;
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else
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cnt = runlen;
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draw_encoded_bitmap((ushort **)&fb,
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cmap[bmap[1]], cnt);
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}
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x += runlen;
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}
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bmap += 2;
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}
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}
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}
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#endif
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__weak void fb_put_byte(uchar **fb, uchar **from)
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{
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*(*fb)++ = *(*from)++;
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}
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#if defined(CONFIG_BMP_16BPP)
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__weak void fb_put_word(uchar **fb, uchar **from)
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{
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*(*fb)++ = *(*from)++;
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*(*fb)++ = *(*from)++;
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}
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#endif /* CONFIG_BMP_16BPP */
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/**
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* video_splash_align_axis() - Align a single coordinate
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*
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*- if a coordinate is 0x7fff then the image will be centred in
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* that direction
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*- if a coordinate is -ve then it will be offset to the
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* left/top of the centre by that many pixels
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*- if a coordinate is positive it will be used unchnaged.
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*
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* @axis: Input and output coordinate
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* @panel_size: Size of panel in pixels for that axis
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* @picture_size: Size of bitmap in pixels for that axis
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*/
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static void video_splash_align_axis(int *axis, unsigned long panel_size,
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unsigned long picture_size)
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{
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long panel_picture_delta = panel_size - picture_size;
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long axis_alignment;
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if (*axis == BMP_ALIGN_CENTER)
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axis_alignment = panel_picture_delta / 2;
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else if (*axis < 0)
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axis_alignment = panel_picture_delta + *axis + 1;
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else
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return;
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*axis = max(0, (int)axis_alignment);
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}
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static void video_set_cmap(struct udevice *dev,
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struct bmp_color_table_entry *cte, unsigned colours)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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int i;
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ushort *cmap = priv->cmap;
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debug("%s: colours=%d\n", __func__, colours);
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for (i = 0; i < colours; ++i) {
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*cmap = ((cte->red << 8) & 0xf800) |
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((cte->green << 3) & 0x07e0) |
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((cte->blue >> 3) & 0x001f);
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cmap++;
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cte++;
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}
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}
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int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
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bool align)
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{
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struct video_priv *priv = dev_get_uclass_priv(dev);
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ushort *cmap_base = NULL;
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int i, j;
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uchar *fb;
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struct bmp_image *bmp = map_sysmem(bmp_image, 0);
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uchar *bmap;
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ushort padded_width;
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unsigned long width, height, byte_width;
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unsigned long pwidth = priv->xsize;
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unsigned colours, bpix, bmp_bpix;
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struct bmp_color_table_entry *palette;
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int hdr_size;
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if (!bmp || !(bmp->header.signature[0] == 'B' &&
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bmp->header.signature[1] == 'M')) {
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printf("Error: no valid bmp image at %lx\n", bmp_image);
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return -EINVAL;
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}
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width = get_unaligned_le32(&bmp->header.width);
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height = get_unaligned_le32(&bmp->header.height);
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bmp_bpix = get_unaligned_le16(&bmp->header.bit_count);
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hdr_size = get_unaligned_le16(&bmp->header.size);
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debug("hdr_size=%d, bmp_bpix=%d\n", hdr_size, bmp_bpix);
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palette = (void *)bmp + 14 + hdr_size;
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colours = 1 << bmp_bpix;
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bpix = VNBITS(priv->bpix);
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if (bpix != 1 && bpix != 8 && bpix != 16 && bpix != 32) {
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printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
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bpix, bmp_bpix);
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return -EINVAL;
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}
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/*
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* We support displaying 8bpp and 24bpp BMPs on 16bpp LCDs
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* and displaying 24bpp BMPs on 32bpp LCDs
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*/
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if (bpix != bmp_bpix &&
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!(bmp_bpix == 8 && bpix == 16) &&
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!(bmp_bpix == 24 && bpix == 16) &&
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!(bmp_bpix == 24 && bpix == 32)) {
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printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
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bpix, get_unaligned_le16(&bmp->header.bit_count));
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return -EPERM;
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}
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debug("Display-bmp: %d x %d with %d colours, display %d\n",
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(int)width, (int)height, (int)colours, 1 << bpix);
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if (bmp_bpix == 8)
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video_set_cmap(dev, palette, colours);
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padded_width = (width & 0x3 ? (width & ~0x3) + 4 : width);
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if (align) {
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video_splash_align_axis(&x, priv->xsize, width);
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video_splash_align_axis(&y, priv->ysize, height);
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}
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if ((x + width) > pwidth)
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width = pwidth - x;
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if ((y + height) > priv->ysize)
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height = priv->ysize - y;
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bmap = (uchar *)bmp + get_unaligned_le32(&bmp->header.data_offset);
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fb = (uchar *)(priv->fb +
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(y + height - 1) * priv->line_length + x * bpix / 8);
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switch (bmp_bpix) {
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case 1:
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case 8: {
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cmap_base = priv->cmap;
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#ifdef CONFIG_VIDEO_BMP_RLE8
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u32 compression = get_unaligned_le32(&bmp->header.compression);
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debug("compressed %d %d\n", compression, BMP_BI_RLE8);
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if (compression == BMP_BI_RLE8) {
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if (bpix != 16) {
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/* TODO implement render code for bpix != 16 */
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printf("Error: only support 16 bpix");
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return -EPROTONOSUPPORT;
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}
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video_display_rle8_bitmap(dev, bmp, cmap_base, fb, x,
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y, width, height);
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break;
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}
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#endif
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if (bpix != 16)
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byte_width = width;
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else
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byte_width = width * 2;
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for (i = 0; i < height; ++i) {
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WATCHDOG_RESET();
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for (j = 0; j < width; j++) {
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if (bpix != 16) {
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fb_put_byte(&fb, &bmap);
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} else {
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*(uint16_t *)fb = cmap_base[*bmap];
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bmap++;
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fb += sizeof(uint16_t) / sizeof(*fb);
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}
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}
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bmap += (padded_width - width);
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fb -= byte_width + priv->line_length;
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}
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break;
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}
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#if defined(CONFIG_BMP_16BPP)
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case 16:
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for (i = 0; i < height; ++i) {
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WATCHDOG_RESET();
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for (j = 0; j < width; j++)
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fb_put_word(&fb, &bmap);
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bmap += (padded_width - width) * 2;
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fb -= width * 2 + priv->line_length;
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}
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break;
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#endif /* CONFIG_BMP_16BPP */
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#if defined(CONFIG_BMP_24BPP)
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case 24:
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for (i = 0; i < height; ++i) {
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for (j = 0; j < width; j++) {
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if (bpix == 16) {
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/* 16bit 555RGB format */
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*(u16 *)fb = ((bmap[2] >> 3) << 10) |
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((bmap[1] >> 3) << 5) |
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(bmap[0] >> 3);
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bmap += 3;
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fb += 2;
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} else {
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*(fb++) = *(bmap++);
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*(fb++) = *(bmap++);
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*(fb++) = *(bmap++);
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*(fb++) = 0;
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}
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}
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fb -= priv->line_length + width * (bpix / 8);
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bmap += (padded_width - width) * 3;
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}
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break;
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#endif /* CONFIG_BMP_24BPP */
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#if defined(CONFIG_BMP_32BPP)
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case 32:
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for (i = 0; i < height; ++i) {
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for (j = 0; j < width; j++) {
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*(fb++) = *(bmap++);
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*(fb++) = *(bmap++);
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*(fb++) = *(bmap++);
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*(fb++) = *(bmap++);
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}
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fb -= priv->line_length + width * (bpix / 8);
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}
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break;
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#endif /* CONFIG_BMP_32BPP */
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default:
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break;
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};
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video_sync(dev, false);
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return 0;
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}
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