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draw_util: refactor surface_initialized macro into function

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This makes it possible to set a breakpoint in gdb on a line in the function and
get a backtrace of un-initialized surface access.
This commit is contained in:
Michael Stapelberg 2022-11-03 23:02:19 +01:00 committed by Michael Stapelberg
parent a59423df81
commit 6e6af01b7a
1 changed files with 26 additions and 14 deletions
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40
libi3/draw_util.c
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@ -20,13 +20,13 @@ extern 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)
static bool surface_initialized(surface_t *surface) {
if (surface->id == XCB_NONE) {
ELOG("Surface %p is not initialized, skipping drawing.\n", surface);
return false;
}
return true;
}
/*
* Initialize the surface to represent the given drawable.
@ -131,7 +131,9 @@ color_t draw_util_hex_to_color(const char *color) {
*
*/
static void draw_util_set_source_color(surface_t *surface, color_t color) {
RETURN_UNLESS_SURFACE_INITIALIZED(surface);
if (!surface_initialized(surface)) {
return;
}
cairo_set_source_rgba(surface->cr, color.red, color.green, color.blue, color.alpha);
}
@ -143,7 +145,9 @@ static void draw_util_set_source_color(surface_t *surface, color_t color) {
*
*/
void draw_util_text(i3String *text, surface_t *surface, color_t fg_color, color_t bg_color, int x, int y, int max_width) {
RETURN_UNLESS_SURFACE_INITIALIZED(surface);
if (!surface_initialized(surface)) {
return;
}
/* Flush any changes before we draw the text as this might use XCB directly. */
CAIRO_SURFACE_FLUSH(surface->surface);
@ -162,7 +166,9 @@ void draw_util_text(i3String *text, surface_t *surface, color_t fg_color, color_
*
*/
void draw_util_image(cairo_surface_t *image, surface_t *surface, int x, int y, int width, int height) {
RETURN_UNLESS_SURFACE_INITIALIZED(surface);
if (!surface_initialized(surface)) {
return;
}
cairo_save(surface->cr);
@ -186,7 +192,9 @@ void draw_util_image(cairo_surface_t *image, surface_t *surface, int x, int y, i
*
*/
void draw_util_rectangle(surface_t *surface, color_t color, double x, double y, double w, double h) {
RETURN_UNLESS_SURFACE_INITIALIZED(surface);
if (!surface_initialized(surface)) {
return;
}
cairo_save(surface->cr);
@ -211,7 +219,9 @@ void draw_util_rectangle(surface_t *surface, color_t color, double x, double y,
*
*/
void draw_util_clear_surface(surface_t *surface, color_t color) {
RETURN_UNLESS_SURFACE_INITIALIZED(surface);
if (!surface_initialized(surface)) {
return;
}
cairo_save(surface->cr);
@ -236,8 +246,10 @@ void draw_util_clear_surface(surface_t *surface, color_t color) {
*/
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) {
RETURN_UNLESS_SURFACE_INITIALIZED(src);
RETURN_UNLESS_SURFACE_INITIALIZED(dest);
if (!surface_initialized(src) ||
!surface_initialized(dest)) {
return;
}
cairo_save(dest->cr);