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-rw-r--r--vnchextile.h189
1 files changed, 189 insertions, 0 deletions
diff --git a/vnchextile.h b/vnchextile.h
new file mode 100644
index 0000000000..7277670a56
--- /dev/null
+++ b/vnchextile.h
@@ -0,0 +1,189 @@
+#define CONCAT_I(a, b) a ## b
+#define CONCAT(a, b) CONCAT_I(a, b)
+#define pixel_t CONCAT(uint, CONCAT(BPP, _t))
+
+static void CONCAT(send_hextile_tile_, BPP)(VncState *vs,
+ int x, int y, int w, int h,
+ pixel_t *last_bg, pixel_t *last_fg,
+ int *has_bg, int *has_fg)
+{
+ char *row = (vs->ds->data + y * vs->ds->linesize + x * vs->depth);
+ pixel_t *irow = (pixel_t *)row;
+ int j, i;
+ pixel_t bg = 0;
+ pixel_t fg = 0;
+ int n_colors = 0;
+ int bg_count = 0;
+ int fg_count = 0;
+ int flags = 0;
+ uint8_t data[(sizeof(pixel_t) + 2) * 16 * 16];
+ int n_data = 0;
+ int n_subtiles = 0;
+
+ for (j = 0; j < h; j++) {
+ for (i = 0; i < w; i++) {
+ switch (n_colors) {
+ case 0:
+ bg = irow[i];
+ n_colors = 1;
+ break;
+ case 1:
+ if (irow[i] != bg) {
+ fg = irow[i];
+ n_colors = 2;
+ }
+ break;
+ case 2:
+ if (irow[i] != bg && irow[i] != fg) {
+ n_colors = 3;
+ } else {
+ if (irow[i] == bg)
+ bg_count++;
+ else if (irow[i] == fg)
+ fg_count++;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ if (n_colors > 2)
+ break;
+ irow += vs->ds->linesize / sizeof(pixel_t);
+ }
+
+ if (n_colors > 1 && fg_count > bg_count) {
+ pixel_t tmp = fg;
+ fg = bg;
+ bg = tmp;
+ }
+
+ if (!*has_bg || *last_bg != bg) {
+ flags |= 0x02;
+ *has_bg = 1;
+ *last_bg = bg;
+ }
+
+ if (!*has_fg || *last_fg != fg) {
+ flags |= 0x04;
+ *has_fg = 1;
+ *last_fg = fg;
+ }
+
+ switch (n_colors) {
+ case 1:
+ n_data = 0;
+ break;
+ case 2:
+ flags |= 0x08;
+
+ irow = (pixel_t *)row;
+
+ for (j = 0; j < h; j++) {
+ int min_x = -1;
+ for (i = 0; i < w; i++) {
+ if (irow[i] == fg) {
+ if (min_x == -1)
+ min_x = i;
+ } else if (min_x != -1) {
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+ min_x = -1;
+ }
+ }
+ if (min_x != -1) {
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+ }
+ irow += vs->ds->linesize / sizeof(pixel_t);
+ }
+ break;
+ case 3:
+ flags |= 0x18;
+
+ irow = (pixel_t *)row;
+
+ if (!*has_bg || *last_bg != bg)
+ flags |= 0x02;
+
+ for (j = 0; j < h; j++) {
+ int has_color = 0;
+ int min_x = -1;
+ pixel_t color;
+
+ for (i = 0; i < w; i++) {
+ if (!has_color) {
+ if (irow[i] == bg)
+ continue;
+ color = irow[i];
+ min_x = i;
+ has_color = 1;
+ } else if (irow[i] != color) {
+ has_color = 0;
+
+ memcpy(data + n_data, &color, sizeof(color));
+ hextile_enc_cord(data + n_data + sizeof(pixel_t), min_x, j, i - min_x, 1);
+ n_data += 2 + sizeof(pixel_t);
+ n_subtiles++;
+
+ min_x = -1;
+ if (irow[i] != bg) {
+ color = irow[i];
+ min_x = i;
+ has_color = 1;
+ }
+ }
+ }
+ if (has_color) {
+ memcpy(data + n_data, &color, sizeof(color));
+ hextile_enc_cord(data + n_data + sizeof(pixel_t), min_x, j, i - min_x, 1);
+ n_data += 2 + sizeof(pixel_t);
+ n_subtiles++;
+ }
+ irow += vs->ds->linesize / sizeof(pixel_t);
+ }
+
+ /* A SubrectsColoured subtile invalidates the foreground color */
+ *has_fg = 0;
+ if (n_data > (w * h * sizeof(pixel_t))) {
+ n_colors = 4;
+ flags = 0x01;
+ *has_bg = 0;
+
+ /* we really don't have to invalidate either the bg or fg
+ but we've lost the old values. oh well. */
+ }
+ default:
+ break;
+ }
+
+ if (n_colors > 3) {
+ flags = 0x01;
+ *has_fg = 0;
+ *has_bg = 0;
+ n_colors = 4;
+ }
+
+ vnc_write_u8(vs, flags);
+ if (n_colors < 4) {
+ if (flags & 0x02)
+ vnc_write(vs, last_bg, sizeof(pixel_t));
+ if (flags & 0x04)
+ vnc_write(vs, last_fg, sizeof(pixel_t));
+ if (n_subtiles) {
+ vnc_write_u8(vs, n_subtiles);
+ vnc_write(vs, data, n_data);
+ }
+ } else {
+ for (j = 0; j < h; j++) {
+ vnc_write(vs, row, w * vs->depth);
+ row += vs->ds->linesize;
+ }
+ }
+}
+
+#undef pixel_t
+#undef CONCAT_I
+#undef CONCAT