74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
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//---
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// gintctl:plot - Simple plotting utility
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//---
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#ifndef GINTCTL_PLOT
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#define GINTCTL_PLOT
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struct plot_ticks
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{
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/* At most 64 ticks can be specified currently (easy to improve) */
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/* If set to non-zero, ticks are placed at multiples of this. By
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default all of them are primary, use [subtick_divisions] to make
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some ticks secondary */
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int multiples;
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/* No other way to specify ticks yet */
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/* Number of subtick per tick; subticks are marked but values are not
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printed. Has no effect when 0 or 1 */
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int subtick_divisions;
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/* sprintf() format producting the text for ticks; defaults to "%d" */
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char const *format;
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/* Formatter function for specific needs; overrides [format] */
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void (*formatter)(char *str, size_t size, int32_t v);
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};
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struct plot
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{
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/* Plot area, including axes and ticks */
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struct {
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int x, y, w, h;
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} area;
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/* Data points and color */
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int32_t *data_x;
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int32_t *data_y;
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int data_len;
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int color;
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/* Tick specification */
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struct plot_ticks ticks_x;
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struct plot_ticks ticks_y;
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/* Grid specification */
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struct {
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enum {
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PLOT_NOGRID = 0,
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PLOT_MAINGRID,
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PLOT_FULLGRID,
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} level;
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int primary_color;
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int secondary_color;
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int dotted;
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} grid;
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/** Internal parameters, computed by plot() **/
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/* Logical bounds */
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int min_x, max_x;
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int min_y, max_y;
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/* Concrete bounds */
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struct {
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int x, y, w, h;
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} graph;
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};
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/* plot(): Render a graph */
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void plot(struct plot *plot);
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#endif /* GINTCTL_PLOT */
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