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When P2=1, empty pixels are transparent. This patch also changes the behavior of P2=0|2, from setting empty pixels to the default background color, to instead use the *current* background color. To implement this, a couple of changes are needed: * Sixel pixels always use alpha=1.0, except for *empty* cells when P2=1 (i.e. transparent pixels). * The renderer draws sixels with the OVER operator, instead of the SRC operator. * The renderer *must* now render the cells beneath the sixel. As an optimization, this is only done for sixels where P2=1. I.e. for fully opaque sixels, there’s no need to render the cells beneath. The sixel renderer isn’t yet hooked into the multi-threaded renderer. This means *rows* (not just the cells) beneath maybe-transparent sixels are rendered single-threaded. Closes #391.
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
#pragma once
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#include "terminal.h"
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#define SIXEL_MAX_COLORS 1024u
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#define SIXEL_MAX_WIDTH 10000u
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#define SIXEL_MAX_HEIGHT 10000u
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void sixel_fini(struct terminal *term);
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void sixel_init(struct terminal *term, int p1, int p2, int p3);
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void sixel_put(struct terminal *term, uint8_t c);
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void sixel_unhook(struct terminal *term);
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void sixel_destroy(struct sixel *sixel);
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void sixel_destroy_all(struct terminal *term);
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void sixel_scroll_up(struct terminal *term, int rows);
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void sixel_scroll_down(struct terminal *term, int rows);
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void sixel_cell_size_changed(struct terminal *term);
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void sixel_reflow(struct terminal *term);
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/*
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* Remove sixel data from the specified location. Used when printing
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* or erasing characters, and when emitting new sixel images, to
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* remove sixel data that would otherwise be rendered on-top.
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*
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* Row numbers are relative to the current grid offset
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*/
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void sixel_overwrite_by_rectangle(
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struct terminal *term, int row, int col, int height, int width);
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void sixel_overwrite_by_row(struct terminal *term, int row, int col, int width);
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void sixel_overwrite_at_cursor(struct terminal *term, int width);
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void sixel_colors_report_current(struct terminal *term);
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void sixel_colors_reset(struct terminal *term);
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void sixel_colors_set(struct terminal *term, unsigned count);
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void sixel_colors_report_max(struct terminal *term);
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void sixel_geometry_report_current(struct terminal *term);
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void sixel_geometry_reset(struct terminal *term);
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void sixel_geometry_set(struct terminal *term, unsigned width, unsigned height);
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void sixel_geometry_report_max(struct terminal *term);
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