Signed-off-by: Rob Clark <robdcl...@gmail.com>
---
src/gallium/include/pipe/p_context.h | 11 +++++++++++
src/mesa/state_tracker/st_cb_fbo.c | 26 ++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/src/gallium/include/pipe/p_context.h
b/src/gallium/include/pipe/p_context.h
index d4e9179b78a..eb52c7e9a4e 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -811,6 +811,17 @@ struct pipe_context {
void (*invalidate_surface)(struct pipe_context *ctx,
struct pipe_surface *surf);
+ /**
+ * Invalidate a portion of a surface. This is used to
+ *
+ * (1) implement glInvalidateSubFramebuffer() and friends
+ * (2) as a hint before a scissored clear (which is turned into draw_vbo()
+ * that the cleared rect can be discarded
+ */
+ void (*invalidate_sub_surface)(struct pipe_context *ctx,
+ struct pipe_surface *surf,
+ const struct pipe_scissor_state *rect);
+
/**
* Return information about unexpected device resets.
*/
diff --git a/src/mesa/state_tracker/st_cb_fbo.c
b/src/mesa/state_tracker/st_cb_fbo.c
index 3ece1d4a9de..50c27ea51d9 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -774,6 +774,31 @@ st_discard_framebuffer(struct gl_context *ctx, struct
gl_framebuffer *fb,
st->pipe->invalidate_surface(st->pipe, psurf);
}
+static void
+st_discard_sub_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ struct gl_renderbuffer_attachment *att, GLint x,
+ GLint y, GLsizei width, GLsizei height)
+{
+ struct st_context *st = st_context(ctx);
+ struct pipe_surface *psurf;
+
+ if (!att->Renderbuffer)
+ return;
+
+ psurf = st_renderbuffer(att->Renderbuffer)->surface;
+
+ if (st->pipe->invalidate_sub_surface) {
+ struct pipe_scissor_state rect;
+
+ rect.minx = x;
+ rect.maxx = x + width - 1;
+ rect.miny = y;
+ rect.maxy = y + height - 1;
+
+ st->pipe->invalidate_sub_surface(st->pipe, psurf, &rect);
+ }
+}
+
/**
* Called via glDrawBuffer. We only provide this driver function so that we
* can check if we need to allocate a new renderbuffer. Specifically, we
@@ -952,6 +977,7 @@ st_init_fbo_functions(struct dd_function_table *functions)
functions->FinishRenderTexture = st_finish_render_texture;
functions->ValidateFramebuffer = st_validate_framebuffer;
functions->DiscardFramebuffer = st_discard_framebuffer;
+ functions->DiscardSubFramebuffer = st_discard_sub_framebuffer;
functions->DrawBufferAllocate = st_DrawBufferAllocate;
functions->ReadBuffer = st_ReadBuffer;
--
2.19.2
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