[igt-dev] [PATCH i-g-t v2 1/2] lib/igt_fb: Add support for drawing rectangles with random colors

["André Almeida" <andrealmeid@igalia.com>]

Add support for drawing rectangles with random colors, useful for tests
that you don't mind which color will be used.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
---

Changes from v1:
- Fix function comment typo

 lib/igt_fb.c | 20 ++++++++++++++++++++
 lib/igt_fb.h |  1 +
 2 files changed, 21 insertions(+)

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index eafbe7fd..5c4648fe 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -1465,6 +1465,26 @@ void igt_paint_color(cairo_t *cr, int x, int y, int w, int h,
 	cairo_fill(cr);
 }
 
+/**
+ * igt_paint_color_rand:
+ * @cr: cairo drawing context
+ * @x: pixel x-coordination of the fill rectangle
+ * @y: pixel y-coordination of the fill rectangle
+ * @w: width of the fill rectangle
+ * @h: height of the fill rectangle
+ *
+ * This functions draws a solid rectangle with random colors using the drawing
+ * context @cr.
+ */
+void igt_paint_color_rand(cairo_t *cr, int x, int y, int w, int h)
+{
+	double r = rand() / (double)RAND_MAX;
+	double g = rand() / (double)RAND_MAX;
+	double b = rand() / (double)RAND_MAX;
+
+	igt_paint_color(cr, x, y, w, h, r, g, b);
+}
+
 /**
  *
  * igt_fill_cts_color_square_framebuffer:
diff --git a/lib/igt_fb.h b/lib/igt_fb.h
index 623a8caa..b3f096fe 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -191,6 +191,7 @@ cairo_t *igt_get_cairo_ctx(int fd, struct igt_fb *fb);
 void igt_put_cairo_ctx(cairo_t *cr);
 void igt_paint_color(cairo_t *cr, int x, int y, int w, int h,
 			 double r, double g, double b);
+void igt_paint_color_rand(cairo_t *cr, int x, int y, int w, int h);
 void igt_paint_color_alpha(cairo_t *cr, int x, int y, int w, int h,
 			       double r, double g, double b, double a);
 void igt_paint_color_gradient(cairo_t *cr, int x, int y, int w, int h,
-- 
2.36.0