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Bug 1172 - Disjoint paths and clip to path

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* clutter/cogl/cogl-path.h:
	* clutter/cogl/common/cogl-primitives.c:
	* clutter/cogl/common/cogl-primitives.h:
	* clutter/cogl/gl/cogl-primitives.c:
	* clutter/cogl/gles/cogl-primitives.c: Changed the semantics of
	cogl_path_move_to. Previously this always started a new path but
	now it instead starts a new disjoint sub path. The path isn't
	cleared until you call either cogl_path_stroke, cogl_path_fill or
	cogl_path_new. There are also cogl_path_stroke_preserve and
	cogl_path_fill_preserve functions.

	* clutter/cogl/gl/cogl-context.c:
	* clutter/cogl/gl/cogl-context.h:
	* clutter/cogl/gles/cogl-context.c:
	* clutter/cogl/gles/cogl-context.h: Convert the path nodes array
	to a GArray.

	* clutter/cogl/gl/cogl-texture.c:
	* clutter/cogl/gles/cogl-texture.c: Call cogl_clip_ensure

	* clutter/cogl/common/cogl-clip-stack.c:
	* clutter/cogl/common/cogl-clip-stack.h: Simplified the clip
	stack code quite a bit to make it more maintainable.  Previously
	whenever you added a new clip it would go through a separate route
	to immediately intersect with the current clip and when you
	removed it again it would immediately rebuild the entire clip. Now
	when you add or remove a clip it doesn't do anything immediately
	but just sets a dirty flag instead.

	* clutter/cogl/gl/cogl.c:
	* clutter/cogl/gles/cogl.c: Taken away the code to intersect
	stencil clips when there is exactly one stencil bit. It won't work
	with path clips and I don't know of any platform that doesn't have
	eight or zero stencil bits. It needs at least three bits to
	intersect a path with an existing clip. cogl_features_init now
	just decides you don't have a stencil buffer at all if you have
	less than three bits.

	* clutter/cogl/cogl.h.in: New functions and documentation.

	* tests/interactive/test-clip.c: Replaced with a different test
	that lets you add and remove clips. The three different mouse
	buttons add clips in different shapes. This makes it easier to
	test multiple levels of clipping.

	* tests/interactive/test-cogl-primitives.c: Use
	cogl_path_stroke_preserve when using the same path again.

	* doc/reference/cogl/cogl-sections.txt: Document the new
	functions.
This commit is contained in:
Neil Roberts
2008-12-04 13:45:09 +00:00
parent be655b05ad
commit 10d7cf3273
17 changed files with 984 additions and 758 deletions
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6
doc/reference/cogl/cogl-sections.txt
View File

@ -29,9 +29,12 @@ cogl_rotatex
cogl_rotate
<SUBSECTION>
cogl_clip_set
cogl_clip_set_from_path
cogl_clip_set_from_path_preserve
cogl_clip_unset
cogl_clip_stack_save
cogl_clip_stack_restore
cogl_clip_ensure
<SUBSECTION>
cogl_enable_depth_test
cogl_enable_backface_culling
@ -63,6 +66,7 @@ cogl_util_next_p2
<SECTION>
<FILE>cogl-primitives</FILE>
<TITLE>Primitives</TITLE>
cogl_path_new
cogl_path_move_to
cogl_path_close
cogl_path_line_to
@ -80,7 +84,9 @@ cogl_path_ellipse
<SUBSECTION>
cogl_path_fill
cogl_path_fill_preserve
cogl_path_stroke
cogl_path_stroke_preserve
cogl_set_source_color
cogl_set_source_color4ub
cogl_set_source_color4x