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-rw-r--r--src/fb.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/fb.h b/src/fb.h
index 64f657b..b990ae6 100644
--- a/src/fb.h
+++ b/src/fb.h
@@ -34,6 +34,8 @@ void fb_get_put_pages_count(fb_t *fb, unsigned *count);
fb_t * fb_new(int drm_fd, uint32_t crtc_id, uint32_t *connectors, int n_connectors, drmModeModeInfoPtr mode, int n_pages);
void fb_fragment_divide(fb_fragment_t *fragment, unsigned n_fragments, fb_fragment_t fragments[]);
+
+/* checks if a coordinate is contained within a fragment */
static inline int fb_fragment_contains(fb_fragment_t *fragment, int x, int y)
{
if (x < fragment->x || x >= fragment->x + fragment->width ||
@@ -43,4 +45,26 @@ static inline int fb_fragment_contains(fb_fragment_t *fragment, int x, int y)
return 1;
}
+
+/* puts a pixel into the fragment, no bounds checking is performed. */
+static inline void fb_fragment_put_pixel_unchecked(fb_fragment_t *fragment, int x, int y, uint32_t pixel)
+{
+ uint32_t *pixels = fragment->buf;
+
+ /* FIXME this assumes stride is aligned to 4 */
+ pixels[(y * (fragment->width + (fragment->stride >> 2))) + x] = pixel;
+}
+
+
+/* puts a pixel into the fragment, bounds checking is performed with a draw performed return status */
+static inline int fb_fragment_put_pixel_checked(fb_fragment_t *fragment, int x, int y, uint32_t pixel)
+{
+ if (!fb_fragment_contains(fragment, x, y))
+ return 0;
+
+ fb_fragment_put_pixel_unchecked(fragment, x, y, pixel);
+
+ return 1;
+}
+
#endif
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