On 06/15/2016 06:24 PM, Ilia Mirkin wrote:
Window rectangles apply to all framebuffer operations, either in inclusive or exclusive mode. They may also be specified as part of a blit operation.In exclusive mode, any fragment inside any of the specified rectangles will be discarded. In inclusive mode, any fragment outside every rectangle will be discarded. The no-op state is to have 0 rectangles in exclusive mode. Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu> --- v3 -> v4: - make it clearer that clears aren't affected by window rectangles. - rename context call to ->set_window_rectangles src/gallium/docs/source/context.rst | 17 ++++++++++++++--- src/gallium/include/pipe/p_context.h | 5 +++++ src/gallium/include/pipe/p_state.h | 6 ++++++ 3 files changed, 25 insertions(+), 3 deletions(-) diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst index 3a45f40..6f09c55 100644 --- a/src/gallium/docs/source/context.rst +++ b/src/gallium/docs/source/context.rst @@ -79,6 +79,17 @@ objects. They all follow simple, one-method binding calls, e.g. should be the same as the number of set viewports and can be up to PIPE_MAX_VIEWPORTS. * ``set_viewport_states`` +* ``set_window_rectangles`` sets the window rectangles to be used for + rendering, as defined by GL_EXT_window_rectangles. There are two + modes - include and exclude, which define whether the supplied + rectangles are to be used for including fragments or excluding + them. All of the rectangles are ORed together, so in exclude mode, + any fragment inside any rectangle would be culled, while in include + mode, any fragment outside all rectangles would be culled. xmin/ymin + are inclusive, while xmax/ymax are exclusive (same as scissor states + above). Note that this only applies to draws, not clears or + blits. (Blits have their own way to pass the requisite rectangles + in.) * ``set_tess_state`` configures the default tessellation parameters: * ``default_outer_level`` is the default value for the outer tessellation levels. This corresponds to GL's ``PATCH_DEFAULT_OUTER_LEVEL``. @@ -492,9 +503,9 @@ This can be considered the equivalent of a CPU memcpy. ``blit`` blits a region of a resource to a region of another resource, including scaling, format conversion, and up-/downsampling, as well as a destination clip -rectangle (scissors). It can also optionally honor the current render condition -(but either way the blit itself never contributes anything to queries currently -gathering data). +rectangle (scissors) and window rectangles. It can also optionally honor the +current render condition (but either way the blit itself never contributes +anything to queries currently gathering data). As opposed to manually drawing a textured quad, this lets the pipe driver choose the optimal method for blitting (like using a special 2D engine), and usually offers, for example, accelerated stencil-only copies even where diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h index 9d7a8eb..6fde875 100644 --- a/src/gallium/include/pipe/p_context.h +++ b/src/gallium/include/pipe/p_context.h @@ -274,6 +274,11 @@ struct pipe_context { unsigned num_scissors, const struct pipe_scissor_state * ); + void (*set_window_rectangles)( struct pipe_context *, + boolean include, + unsigned num_rectangles, + const struct pipe_scissor_state * ); + void (*set_viewport_states)( struct pipe_context *, unsigned start_slot, unsigned num_viewports, diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h index 396f563..9c69355 100644 --- a/src/gallium/include/pipe/p_state.h +++ b/src/gallium/include/pipe/p_state.h @@ -69,6 +69,7 @@ extern "C" { #define PIPE_MAX_VIEWPORTS 16 #define PIPE_MAX_CLIP_OR_CULL_DISTANCE_COUNT 8 #define PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT 2 +#define PIPE_MAX_WINDOW_RECTANGLES 8 struct pipe_reference @@ -710,6 +711,11 @@ struct pipe_blit_info boolean scissor_enable; struct pipe_scissor_state scissor; + /* Window rectangles can either be inclusive or exclusive. */ + boolean window_rectangle_include; + unsigned num_window_rectangles; + struct pipe_scissor_state window_rectangles[PIPE_MAX_WINDOW_RECTANGLES]; + boolean render_condition_enable; /**< whether the blit should honor the current render condition */ boolean alpha_blend; /* dst.rgb = src.rgb * src.a + dst.rgb * (1 - src.a) */
Reviewed-by: Brian Paul <bri...@vmware.com> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
