charts: first stab at factoring out Xlib from charts/vmon

1 files changed, 95 insertions, 0 deletions

diff --git a/src/vcr.h b/src/vcr.h
new file mode 100644
index 0000000..089e79a
--- /dev/null
+++ b/src/vcr.h
@@ -0,0 +1,95 @@
+#ifndef _VCR_H
+#define _VCR_H
+
+#include <stdio.h> /* for FILE* */
+
+#ifdef USE_XLIB
+#include <X11/extensions/Xrender.h> /* for Picture */
+#endif /* USE_XLIB */
+
+#define VCR_DRAW_TEXT_N_STRS_MAX	512
+#define VCR_ROW_HEIGHT			15	/* this should always be larger than the font height */
+
+typedef enum vcr_backend_type_t {
+#ifdef USE_XLIB
+	VCR_BACKEND_TYPE_XLIB,
+#endif /* USE_XLIB */
+	VCR_BACKEND_TYPE_MEM,
+} vcr_backend_type_t;
+
+/* there are very minimal backend events plumbed out from the X events */
+typedef enum vcr_backend_event_t {
+	VCR_BACKEND_EVENT_NOOP,
+	VCR_BACKEND_EVENT_RESIZE,
+	VCR_BACKEND_EVENT_REDRAW,
+	VCR_BACKEND_EVENT_QUIT,
+} vcr_backend_event_t;
+
+typedef enum vcr_present_op_t {
+	VCR_PRESENT_OP_SRC,	/* equivalent to XRender PictOpSrc */
+	VCR_PRESENT_OP_OVER,	/* equivaletn to XRender PictOpOver */
+} vcr_present_op_t;
+
+typedef enum vcr_layer_t {
+	VCR_LAYER_TEXT,		/* the text layer for threadName/argv/wchan/state/pid etc. */
+	VCR_LAYER_SHADOW,	/* the shadow layer below the text (XXX: this must be kept after text) */
+	VCR_LAYER_GRAPHA,	/* the graph A layer below the shadow layer */
+	VCR_LAYER_GRAPHB,	/* the graph B layer below the shadow layer */
+	VCR_LAYER_BG,		/* the background layer (row separators, with milestone breaks */
+#if 0
+	/* It should be reasonable to support up to eight layers, so there's room to grow.
+	 * per-thread memory use seems like a good idea..
+	 */
+	VCR_LAYER_UNUSED1,	/* TODO */
+	VCR_LAYER_UNUSED2,	/* TODO */
+	VCR_LAYER_UNUSED3,	/* TODO */
+#endif
+	VCR_LAYER_CNT,
+} vcr_layer_t;
+
+typedef struct vcr_backend_t vcr_backend_t;
+typedef struct vcr_dest_t vcr_dest_t;
+typedef struct vcr_t vcr_t;
+
+typedef struct vcr_str_t {
+	const char	*str;
+	size_t		len;
+} vcr_str_t;
+
+vcr_backend_t * vcr_backend_new(vcr_backend_type_t backend, ...);
+int vcr_backend_get_dimensions(vcr_backend_t *vbe, int *res_width, int *res_height);
+int vcr_backend_poll(vcr_backend_t *vbe, int timeout);
+vcr_backend_event_t vcr_backend_next_event(vcr_backend_t *vbe, int *res_width, int *res_height);
+vcr_backend_t * vcr_backend_free(vcr_backend_t *vbe);
+
+#ifdef USE_XLIB
+vcr_dest_t * vcr_dest_xwindow_new(vcr_backend_t *vbe, const char *name, unsigned width, unsigned height);
+unsigned vcr_dest_xwindow_get_id(vcr_dest_t *dest);
+vcr_dest_t * vcr_dest_xpicture_new(vcr_backend_t *vbe, Picture picture);
+#endif /* USE_XLIB */
+#ifdef USE_PNG
+vcr_dest_t * vcr_dest_png_new(vcr_backend_t *vbe, FILE *output);
+#endif /* USE_PNG */
+vcr_dest_t * vcr_dest_free(vcr_dest_t *dest);
+
+vcr_t * vcr_new(vcr_backend_t *vbe, int *hierarchy_end_ptr, int *snowflakes_cnt_ptr);
+vcr_t * vcr_free(vcr_t *vcr);
+int vcr_resize_visible(vcr_t *vcr, int width, int height);
+void vcr_draw_text(vcr_t *vcr, vcr_layer_t layer, int x, int row, const vcr_str_t *strs, int n_strs, int *res_width);
+void vcr_draw_ortho_line(vcr_t *vcr, vcr_layer_t layer, int x1, int y1, int x2, int y2);
+void vcr_mark_finish_line(vcr_t *vcr, vcr_layer_t layer, int row);
+void vcr_draw_bar(vcr_t *vcr, vcr_layer_t layer, int row, double t, int min_height);
+void vcr_clear_row(vcr_t *vcr, vcr_layer_t layer, int row, int x, int width);
+void vcr_shift_below_row_up_one(vcr_t *vcr, int row);
+void vcr_shift_below_row_down_one(vcr_t *vcr, int row);
+void vcr_shadow_row(vcr_t *vcr, vcr_layer_t layer, int row);
+void vcr_stash_row(vcr_t *vcr, vcr_layer_t layer, int row);
+void vcr_unstash_row(vcr_t *vcr, vcr_layer_t layer, int row);
+void vcr_advance_phase(vcr_t *vcr, int delta);
+int vcr_compose(vcr_t *vcr);
+#ifdef USE_XLIB
+int vcr_get_composed_xdamage(vcr_t *vcr, XserverRegion *res_damaged_region);
+#endif /* USE_XLIB */
+int vcr_present(vcr_t *vcr, vcr_present_op_t op, vcr_dest_t *dest, int x, int y, int width, int height);
+
+#endif /* _VCR_H */