Emit 3DSTATE_SCISSOR_STATE_POINTERS using brw_batch_emit, and pack the scissor states using GENX(SCISSOR_RECT_pack), generated from genxml.
Signed-off-by: Rafael Antognolli <rafael.antogno...@intel.com> --- src/mesa/drivers/dri/i965/brw_state.h | 1 +- src/mesa/drivers/dri/i965/genX_state_upload.c | 87 +++++++++++++++++++- 2 files changed, 84 insertions(+), 4 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h index 66255ea..ac4f151 100644 --- a/src/mesa/drivers/dri/i965/brw_state.h +++ b/src/mesa/drivers/dri/i965/brw_state.h @@ -114,7 +114,6 @@ extern const struct brw_tracked_state gen6_gs_binding_table; extern const struct brw_tracked_state gen6_multisample_state; extern const struct brw_tracked_state gen6_renderbuffer_surfaces; extern const struct brw_tracked_state gen6_sampler_state; -extern const struct brw_tracked_state gen6_scissor_state; extern const struct brw_tracked_state gen6_sol_surface; extern const struct brw_tracked_state gen6_sf_vp; extern const struct brw_tracked_state gen6_urb; diff --git a/src/mesa/drivers/dri/i965/genX_state_upload.c b/src/mesa/drivers/dri/i965/genX_state_upload.c index c3dcbc3..aa7aaac 100644 --- a/src/mesa/drivers/dri/i965/genX_state_upload.c +++ b/src/mesa/drivers/dri/i965/genX_state_upload.c @@ -2665,6 +2665,87 @@ static const struct brw_tracked_state genX(te_state) = { }; #endif +static void +genX(upload_scissor_state)(struct brw_context *brw) +{ + struct gl_context *ctx = &brw->ctx; + const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); + struct GENX(SCISSOR_RECT) scissor; + uint32_t scissor_state_offset; + const unsigned int fb_width= _mesa_geometric_width(ctx->DrawBuffer); + const unsigned int fb_height = _mesa_geometric_height(ctx->DrawBuffer); + uint32_t *scissor_map; + + /* BRW_NEW_VIEWPORT_COUNT */ + const unsigned viewport_count = brw->clip.viewport_count; + + scissor_map = brw_state_batch( + brw, GENX(SCISSOR_RECT_length) * sizeof(uint32_t) * viewport_count, + 32, &scissor_state_offset); + + /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT */ + + /* The scissor only needs to handle the intersection of drawable and + * scissor rect. Clipping to the boundaries of static shared buffers + * for front/back/depth is covered by looping over cliprects in brw_draw.c. + * + * Note that the hardware's coordinates are inclusive, while Mesa's min is + * inclusive but max is exclusive. + */ + for (unsigned i = 0; i < viewport_count; i++) { + int bbox[4]; + + bbox[0] = MAX2(ctx->ViewportArray[i].X, 0); + bbox[1] = MIN2(bbox[0] + ctx->ViewportArray[i].Width, fb_width); + bbox[2] = MAX2(ctx->ViewportArray[i].Y, 0); + bbox[3] = MIN2(bbox[2] + ctx->ViewportArray[i].Height, fb_height); + _mesa_intersect_scissor_bounding_box(ctx, i, bbox); + + if (bbox[0] == bbox[1] || bbox[2] == bbox[3]) { + /* If the scissor was out of bounds and got clamped to 0 width/height + * at the bounds, the subtraction of 1 from maximums could produce a + * negative number and thus not clip anything. Instead, just provide + * a min > max scissor inside the bounds, which produces the expected + * no rendering. + */ + scissor.ScissorRectangleXMin = 1; + scissor.ScissorRectangleXMax = 0; + scissor.ScissorRectangleYMin = 1; + scissor.ScissorRectangleYMax = 0; + } else if (render_to_fbo) { + /* texmemory: Y=0=bottom */ + scissor.ScissorRectangleXMin = bbox[0]; + scissor.ScissorRectangleXMax = bbox[1] - 1; + scissor.ScissorRectangleYMin = bbox[2]; + scissor.ScissorRectangleYMax = bbox[3] - 1; + } else { + /* memory: Y=0=top */ + scissor.ScissorRectangleXMin = bbox[0]; + scissor.ScissorRectangleXMax = bbox[1] - 1; + scissor.ScissorRectangleYMin = fb_height - bbox[3]; + scissor.ScissorRectangleYMax = fb_height - bbox[2] - 1; + } + + GENX(SCISSOR_RECT_pack)(NULL, scissor_map + i * 2, &scissor); + } + + brw_batch_emit(brw, GENX(3DSTATE_SCISSOR_STATE_POINTERS), ptr) { + ptr.ScissorRectPointer = scissor_state_offset; + } +} + +static const struct brw_tracked_state genX(scissor_state) = { + .dirty = { + .mesa = _NEW_BUFFERS | + _NEW_SCISSOR | + _NEW_VIEWPORT, + .brw = BRW_NEW_BATCH | + BRW_NEW_BLORP | + BRW_NEW_VIEWPORT_COUNT, + }, + .emit = genX(upload_scissor_state), +}; + /* ---------------------------------------------------------------------- */ void @@ -2718,7 +2799,7 @@ genX(init_atoms)(struct brw_context *brw) &genX(sf_state), &genX(wm_state), - &gen6_scissor_state, + &genX(scissor_state), &gen6_binding_table_pointers, @@ -2808,7 +2889,7 @@ genX(init_atoms)(struct brw_context *brw) &genX(wm_state), &genX(ps_state), - &gen6_scissor_state, + &genX(scissor_state), &gen7_depthbuffer, @@ -2899,7 +2980,7 @@ genX(init_atoms)(struct brw_context *brw) &genX(depth_stencil_state), &genX(wm_state), - &gen6_scissor_state, + &genX(scissor_state), &gen7_depthbuffer, -- git-series 0.9.1 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev