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Before this patch, when the cell dimensions changed (i.e. when the font size changes), sixel images were either removed (the new cell dimensions are smaller than the old), or simply kept at their original size (new cell dimensions are larger). With this patch, sixels are instead resized. This means a sixel *always* occupies the same number of rows and columns, regardless of how much the font size is changed. This is done by maintaining two sets of image data and pixman images, as well as their dimensions. These two sets are the new ‘original’ and ‘scaled’ members of the sixel struct. The "top-level" pixman image pointer, and the ‘width’ and ‘height’ members either point to the "original", or the "scaled" version. They are invalidated as soon as the cell dimensions change. They, and the ‘scaled’ image is updated on-demand (when we need to render a sixel). Note that the ‘scaled’ image is always NULL when the current cell dimensions matches the ones used when emitting the sixel (to save run-time memory). Closes #1383
50 lines
1.8 KiB
C
50 lines
1.8 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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typedef void (*sixel_put)(struct terminal *term, uint8_t c);
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void sixel_fini(struct terminal *term);
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sixel_put sixel_init(struct terminal *term, int p1, int p2, int p3);
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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_sync_cache(const struct terminal *term, struct sixel *sixel);
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void sixel_reflow_grid(struct terminal *term, struct grid *grid);
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/* Shortcut for sixel_reflow_grid(normal) + sixel_reflow_grid(alt) */
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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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