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-rw-r--r--fb.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/fb.h b/fb.h
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+++ b/fb.h
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+#ifndef _FB_H
+#define _FB_H
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <xf86drmMode.h> /* for drmModeModeInfoPtr */
+
+/* All renderers should target fb_fragment_t, which may or may not represent
+ * a full-screen mmap. Helpers are provided for subdividing fragments for
+ * concurrent renderers.
+ */
+typedef struct fb_fragment_t {
+ uint32_t *buf; /* pointer to the first pixel in the fragment */
+ unsigned x, y; /* absolute coordinates of the upper left corner of this fragment */
+ unsigned width, height; /* width and height of this fragment */
+ unsigned stride; /* number of bytes from the end of one row to the start of the next */
+} fb_fragment_t;
+
+/* This is a page handle object for page flip submission/life-cycle.
+ * Outside of fb_page_get()/fb_page_put(), you're going to be interested in
+ * fb_fragment_t. The fragment included here describes the whole page,
+ * it may be divided via fb_fragment_divide().
+ */
+typedef struct fb_page_t {
+ fb_fragment_t fragment;
+} fb_page_t;
+
+typedef struct fb_t fb_t;
+
+fb_page_t * fb_page_get(fb_t *fb);
+void fb_page_put(fb_t *fb, fb_page_t *page);
+void fb_free(fb_t *fb);
+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[]);
+
+#endif
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