* draw.c: Utility for drawing.
*
*/
+#include "libi3.h"
+
#include <stdlib.h>
#include <err.h>
#include <string.h>
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
-#ifdef CAIRO_SUPPORT
#include <cairo/cairo-xcb.h>
-#endif
-
-#include "libi3.h"
-xcb_connection_t *xcb_connection;
+/* The default visual_type to use if none is specified when creating the surface. Must be defined globally. */
xcb_visualtype_t *visual_type;
/* Forward declarations */
static void draw_util_set_source_color(surface_t *surface, color_t color);
+#define RETURN_UNLESS_SURFACE_INITIALIZED(surface) \
+ do { \
+ if ((surface)->id == XCB_NONE) { \
+ ELOG("Surface %p is not initialized, skipping drawing.\n", surface); \
+ return; \
+ } \
+ } while (0)
+
/*
* Initialize the surface to represent the given drawable.
*
*/
-void draw_util_surface_init(surface_t *surface, xcb_drawable_t drawable, int width, int height) {
+void draw_util_surface_init(xcb_connection_t *conn, surface_t *surface, xcb_drawable_t drawable,
+ xcb_visualtype_t *visual, int width, int height) {
surface->id = drawable;
+ surface->visual_type = ((visual == NULL) ? visual_type : visual);
surface->width = width;
surface->height = height;
- surface->gc = xcb_generate_id(xcb_connection);
- xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection, surface->gc, surface->id, 0, NULL);
+ surface->gc = xcb_generate_id(conn);
+ xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(conn, surface->gc, surface->id, 0, NULL);
- xcb_generic_error_t *error = xcb_request_check(xcb_connection, gc_cookie);
+ xcb_generic_error_t *error = xcb_request_check(conn, gc_cookie);
if (error != NULL) {
- ELOG("Could not create graphical context. Error code: %d\n", error->error_code);
- exit(EXIT_FAILURE);
+ ELOG("Could not create graphical context. Error code: %d. Please report this bug.\n", error->error_code);
}
-#ifdef CAIRO_SUPPORT
- surface->surface = cairo_xcb_surface_create(xcb_connection, surface->id, visual_type, width, height);
+ surface->surface = cairo_xcb_surface_create(conn, surface->id, surface->visual_type, width, height);
surface->cr = cairo_create(surface->surface);
-#endif
}
/*
* Destroys the surface.
*
*/
-void draw_util_surface_free(surface_t *surface) {
- xcb_free_gc(xcb_connection, surface->gc);
-#ifdef CAIRO_SUPPORT
+void draw_util_surface_free(xcb_connection_t *conn, surface_t *surface) {
+ xcb_free_gc(conn, surface->gc);
cairo_surface_destroy(surface->surface);
cairo_destroy(surface->cr);
-#endif
+
+ /* We need to explicitly set these to NULL to avoid assertion errors in
+ * cairo when calling this multiple times. This can happen, for example,
+ * when setting the border of a window to none and then closing it. */
+ surface->surface = NULL;
+ surface->cr = NULL;
+}
+
+/*
+ * Resize the surface to the given size.
+ *
+ */
+void draw_util_surface_set_size(surface_t *surface, int width, int height) {
+ surface->width = width;
+ surface->height = height;
+ cairo_xcb_surface_set_size(surface->surface, width, height);
}
/*
*
*/
color_t draw_util_hex_to_color(const char *color) {
- char groups[3][3] = {
+ if (strlen(color) < 6 || color[0] != '#') {
+ ELOG("Could not parse color: %s\n", color);
+ return draw_util_hex_to_color("#A9A9A9");
+ }
+
+ char alpha[2];
+ if (strlen(color) == strlen("#rrggbbaa")) {
+ alpha[0] = color[7];
+ alpha[1] = color[8];
+ } else {
+ alpha[0] = alpha[1] = 'F';
+ }
+
+ char groups[4][3] = {
{color[1], color[2], '\0'},
{color[3], color[4], '\0'},
- {color[5], color[6], '\0'}};
+ {color[5], color[6], '\0'},
+ {alpha[0], alpha[1], '\0'}};
return (color_t){
.red = strtol(groups[0], NULL, 16) / 255.0,
.green = strtol(groups[1], NULL, 16) / 255.0,
.blue = strtol(groups[2], NULL, 16) / 255.0,
+ .alpha = strtol(groups[3], NULL, 16) / 255.0,
.colorpixel = get_colorpixel(color)};
}
*
*/
static void draw_util_set_source_color(surface_t *surface, color_t color) {
-#ifdef CAIRO_SUPPORT
- cairo_set_source_rgb(surface->cr, color.red, color.green, color.blue);
-#else
- uint32_t colorpixel = color.colorpixel;
- xcb_change_gc(xcb_connection, surface->gc, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND,
- (uint32_t[]){colorpixel, colorpixel});
-#endif
+ RETURN_UNLESS_SURFACE_INITIALIZED(surface);
+
+ cairo_set_source_rgba(surface->cr, color.red, color.green, color.blue, color.alpha);
}
-/**
+/*
* Draw the given text using libi3.
* This function also marks the surface dirty which is needed if other means of
* drawing are used. This will be the case when using XCB to draw text.
*
*/
void draw_util_text(i3String *text, surface_t *surface, color_t fg_color, color_t bg_color, int x, int y, int max_width) {
-#ifdef CAIRO_SUPPORT
+ RETURN_UNLESS_SURFACE_INITIALIZED(surface);
+
/* Flush any changes before we draw the text as this might use XCB directly. */
CAIRO_SURFACE_FLUSH(surface->surface);
-#endif
- set_font_colors(surface->gc, fg_color.colorpixel, bg_color.colorpixel);
- draw_text(text, surface->id, surface->gc, visual_type, x, y, max_width);
+ set_font_colors(surface->gc, fg_color, bg_color);
+ draw_text(text, surface->id, surface->gc, surface->visual_type, x, y, max_width);
-#ifdef CAIRO_SUPPORT
/* Notify cairo that we (possibly) used another way to draw on the surface. */
cairo_surface_mark_dirty(surface->surface);
-#endif
}
-/**
+/*
* Draws a filled rectangle.
* This function is a convenience wrapper and takes care of flushing the
* surface as well as restoring the cairo state.
*
*/
void draw_util_rectangle(surface_t *surface, color_t color, double x, double y, double w, double h) {
-#ifdef CAIRO_SUPPORT
+ RETURN_UNLESS_SURFACE_INITIALIZED(surface);
+
cairo_save(surface->cr);
/* Using the SOURCE operator will copy both color and alpha information directly
CAIRO_SURFACE_FLUSH(surface->surface);
cairo_restore(surface->cr);
-#else
- draw_util_set_source_color(surface, color);
-
- xcb_rectangle_t rect = {x, y, w, h};
- xcb_poly_fill_rectangle(xcb_connection, surface->id, surface->gc, 1, &rect);
-#endif
}
-/**
+/*
* Clears a surface with the given color.
*
*/
void draw_util_clear_surface(surface_t *surface, color_t color) {
-#ifdef CAIRO_SUPPORT
+ RETURN_UNLESS_SURFACE_INITIALIZED(surface);
+
cairo_save(surface->cr);
/* Using the SOURCE operator will copy both color and alpha information directly
CAIRO_SURFACE_FLUSH(surface->surface);
cairo_restore(surface->cr);
-#else
- draw_util_set_source_color(surface, color);
-
- xcb_rectangle_t rect = {0, 0, surface->width, surface->height};
- xcb_poly_fill_rectangle(xcb_connection, surface->id, surface->gc, 1, &rect);
-#endif
}
-/**
+/*
* Copies a surface onto another surface.
*
*/
void draw_util_copy_surface(surface_t *src, surface_t *dest, double src_x, double src_y,
double dest_x, double dest_y, double width, double height) {
-#ifdef CAIRO_SUPPORT
+ RETURN_UNLESS_SURFACE_INITIALIZED(src);
+ RETURN_UNLESS_SURFACE_INITIALIZED(dest);
+
cairo_save(dest->cr);
/* Using the SOURCE operator will copy both color and alpha information directly
CAIRO_SURFACE_FLUSH(dest->surface);
cairo_restore(dest->cr);
-#else
- xcb_copy_area(xcb_connection, src->id, dest->id, dest->gc, (int16_t)src_x, (int16_t)src_y,
- (int16_t)dest_x, (int16_t)dest_y, (uint16_t)width, (uint16_t)height);
-#endif
}
projects / i3 / i3 / blobdiff