initial commit of netsurf framebuffer library

svn path=/trunk/libnsfb/; revision=7060

1 files changed, 88 insertions, 0 deletions

diff --git a/include/nsfb_plot.h b/include/nsfb_plot.h
new file mode 100644
index 0000000..2dbd22a
--- /dev/null
+++ b/include/nsfb_plot.h
@@ -0,0 +1,88 @@
+
+
+/** Clears plotting area to a flat colour (if needed)
+ */
+typedef bool (nsfb_plotfn_clg_t)(nsfb_t *nsfb, nsfb_colour_t c);
+
+/** Plots a rectangle outline. The line can be solid, dotted or
+ *		  dashed. Top left corner at (x0,y0) and rectangle has given
+ *		  width and height.
+ */
+typedef	bool (nsfb_plotfn_rectangle_t)(nsfb_t *nsfb, nsfb_bbox_t *rect, int line_width, nsfb_colour_t c, bool dotted, bool dashed);
+
+/** Plots a line from (x0,y0) to (x1,y1). Coordinates are at
+ *		  centre of line width/thickness.
+ */
+typedef bool (nsfb_plotfn_line_t)(nsfb_t *nsfb, nsfb_bbox_t *line, int line_width, nsfb_colour_t c, bool dotted, bool dashed);
+
+/** Plots a filled polygon with straight lines between points.
+ *		  The lines around the edge of the ploygon are not plotted. The
+ *		  polygon is filled with the non-zero winding rule.
+ */
+typedef	bool (nsfb_plotfn_polygon_t)(nsfb_t *nsfb, const int *p, unsigned int n, nsfb_colour_t fill);
+
+/** Plots a filled rectangle. Top left corner at (x0,y0), bottom
+ *		  right corner at (x1,y1). Note: (x0,y0) is inside filled area,
+ *		  but (x1,y1) is below and to the right. See diagram below.
+ */
+typedef	bool (nsfb_plotfn_fill_t)(nsfb_t *nsfb, nsfb_bbox_t *rect, nsfb_colour_t c);
+
+/** Sets a clip rectangle for subsequent plots.
+ */
+typedef	bool (nsfb_plotfn_clip_t)(nsfb_t *nsfb, nsfb_bbox_t *clip);
+
+/** Plots an arc, around (x,y), from anticlockwise from angle1 to
+ *		  angle2. Angles are measured anticlockwise from horizontal, in
+ *		  degrees.
+ */
+typedef	bool (nsfb_plotfn_arc_t)(nsfb_t *nsfb, int x, int y, int radius, int angle1, int angle2, nsfb_colour_t c);
+
+/** Plots a point.
+ *
+ * Plot a single alpha blended pixel.
+ */
+typedef	bool (nsfb_plotfn_point_t)(nsfb_t *nsfb, int x, int y, nsfb_colour_t c);
+
+/** Plot an ellipse.
+ *
+ * plot an ellipse outline, note if teh bounding box is square this will plot a
+ * circle.
+ */
+typedef	bool (nsfb_plotfn_ellipse_t)(nsfb_t *nsfb, nsfb_bbox_t *ellipse, nsfb_colour_t c);
+
+/** Plot a filled ellipse.
+ *
+ * plot a filled ellipse, note if the bounding box is square this will plot a
+ * circle.
+ */
+typedef	bool (nsfb_plotfn_ellipse_fill_t)(nsfb_t *nsfb, nsfb_bbox_t *ellipse, nsfb_colour_t c);
+
+
+/** Plot bitmap
+ */
+typedef bool (nsfb_plotfn_bitmap_t)(nsfb_t *nsfb, nsfb_bbox_t *loc,  nsfb_colour_t *pixel, int bmp_width, int bmp_height, int bmp_stride, bool alpha);
+
+
+/** Copy an area of screen 
+ *
+ * Copy an area of the display.
+ */
+typedef bool (nsfb_plotfn_copy_t)(nsfb_t *nsfb, int srcx, int srcy, int width, int height, int dstx, int dsty);
+
+/** plotter function table. */
+typedef struct nsfb_plotter_fns_s {
+    nsfb_plotfn_clg_t *clg;
+    nsfb_plotfn_rectangle_t *rectangle;
+    nsfb_plotfn_line_t *line;
+    nsfb_plotfn_polygon_t *polygon;
+    nsfb_plotfn_fill_t *fill;
+    nsfb_plotfn_clip_t *clip;
+    nsfb_plotfn_ellipse_t *ellipse;
+    nsfb_plotfn_ellipse_fill_t *ellipse_fill;
+    nsfb_plotfn_arc_t *arc;
+    nsfb_plotfn_bitmap_t *bitmap;
+    nsfb_plotfn_point_t *point;
+    nsfb_plotfn_copy_t *copy;
+} nsfb_plotter_fns_t;
+
+