/**************************************************************************
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*
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* Copyright 2009 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* The rast code is concerned with rasterization of command bins.
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* Each screen tile has a bin associated with it. To render the
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* scene we iterate over the tile bins and execute the commands
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* in each bin.
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* We'll do that with multiple threads...
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*/
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#ifndef LP_RAST_H
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#define LP_RAST_H
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#include "pipe/p_compiler.h"
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#include "util/u_pack_color.h"
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#include "lp_jit.h"
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struct lp_rasterizer;
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struct lp_scene;
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struct lp_fence;
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struct cmd_bin;
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#define FIXED_TYPE_WIDTH 64
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/** For sub-pixel positioning */
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#define FIXED_ORDER 8
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#define FIXED_ONE (1<<FIXED_ORDER)
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#define FIXED_SHIFT (FIXED_TYPE_WIDTH - 1)
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/** Maximum length of an edge in a primitive in pixels.
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* If the framebuffer is large we have to think about fixed-point
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* integer overflow. Coordinates need ((FIXED_TYPE_WIDTH/2) - 1) bits
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* to be able to fit product of two such coordinates inside
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* FIXED_TYPE_WIDTH, any larger and we could overflow a
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* FIXED_TYPE_WIDTH_-bit int.
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*/
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#define MAX_FIXED_LENGTH (1 << (((FIXED_TYPE_WIDTH/2) - 1) - FIXED_ORDER))
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#define MAX_FIXED_LENGTH32 (1 << (((32/2) - 1) - FIXED_ORDER))
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/* Rasterizer output size going to jit fs, width/height */
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#define LP_RASTER_BLOCK_SIZE 4
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#define LP_MAX_ACTIVE_BINNED_QUERIES 64
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#define IMUL64(a, b) (((int64_t)(a)) * ((int64_t)(b)))
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struct lp_rasterizer_task;
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/**
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* Rasterization state.
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* Objects of this type are put into the shared data bin and pointed
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* to by commands in the per-tile bins.
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*/
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struct lp_rast_state {
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/* State for the shader. This also contains state which feeds into
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* the fragment shader, such as blend color and alpha ref value.
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*/
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struct lp_jit_context jit_context;
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/* The shader itself. Probably we also need to pass a pointer to
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* the tile color/z/stencil data somehow
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*/
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struct lp_fragment_shader_variant *variant;
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};
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/**
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* Coefficients necessary to run the shader at a given location.
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* First coefficient is position.
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* These pointers point into the bin data buffer.
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*/
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struct lp_rast_shader_inputs {
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unsigned frontfacing:1; /** True for front-facing */
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unsigned disable:1; /** Partially binned, disable this command */
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unsigned opaque:1; /** Is opaque */
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unsigned pad0:29; /* wasted space */
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unsigned stride; /* how much to advance data between a0, dadx, dady */
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unsigned layer; /* the layer to render to (from gs, already clamped) */
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unsigned viewport_index; /* the active viewport index (from gs, already clamped) */
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/* followed by a0, dadx, dady and planes[] */
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};
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struct lp_rast_plane {
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/* edge function values at minx,miny ?? */
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int64_t c;
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int32_t dcdx;
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int32_t dcdy;
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/* one-pixel sized trivial reject offsets for each plane */
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uint32_t eo;
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/*
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* We rely on this struct being 64bit aligned (ideally it would be 128bit
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* but that's quite the waste) and therefore on 32bit we need padding
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* since otherwise (even with the 64bit number in there) it wouldn't be.
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*/
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uint32_t pad;
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};
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/**
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* Rasterization information for a triangle known to be in this bin,
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* plus inputs to run the shader:
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* These fields are tile- and bin-independent.
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* Objects of this type are put into the lp_setup_context::data buffer.
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*/
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struct lp_rast_triangle {
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#ifdef DEBUG
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float v[3][2];
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float pad0;
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float pad1;
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#endif
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/* inputs for the shader */
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struct lp_rast_shader_inputs inputs;
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/* planes are also allocated here */
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};
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struct lp_rast_clear_rb {
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union util_color color_val;
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unsigned cbuf;
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};
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#define GET_A0(inputs) ((float (*)[4])((inputs)+1))
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#define GET_DADX(inputs) ((float (*)[4])((char *)((inputs) + 1) + (inputs)->stride))
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#define GET_DADY(inputs) ((float (*)[4])((char *)((inputs) + 1) + 2 * (inputs)->stride))
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#define GET_PLANES(tri) ((struct lp_rast_plane *)((char *)(&(tri)->inputs + 1) + 3 * (tri)->inputs.stride))
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struct lp_rasterizer *
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lp_rast_create( unsigned num_threads );
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void
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lp_rast_destroy( struct lp_rasterizer * );
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void
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lp_rast_queue_scene( struct lp_rasterizer *rast,
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struct lp_scene *scene );
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void
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lp_rast_finish( struct lp_rasterizer *rast );
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union lp_rast_cmd_arg {
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const struct lp_rast_shader_inputs *shade_tile;
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struct {
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const struct lp_rast_triangle *tri;
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unsigned plane_mask;
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} triangle;
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const struct lp_rast_state *set_state;
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const struct lp_rast_clear_rb *clear_rb;
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struct {
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uint64_t value;
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uint64_t mask;
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} clear_zstencil;
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const struct lp_rast_state *state;
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struct lp_fence *fence;
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struct llvmpipe_query *query_obj;
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};
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/* Cast wrappers. Hopefully these compile to noops!
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*/
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static inline union lp_rast_cmd_arg
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lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
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{
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union lp_rast_cmd_arg arg;
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arg.shade_tile = shade_tile;
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_triangle( const struct lp_rast_triangle *triangle,
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unsigned plane_mask)
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{
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union lp_rast_cmd_arg arg;
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arg.triangle.tri = triangle;
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arg.triangle.plane_mask = plane_mask;
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return arg;
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}
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/**
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* Build argument for a contained triangle.
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*
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* All planes are enabled, so instead of the plane mask we pass the upper
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* left coordinates of the a block that fully encloses the triangle.
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*/
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static inline union lp_rast_cmd_arg
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lp_rast_arg_triangle_contained( const struct lp_rast_triangle *triangle,
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unsigned x, unsigned y)
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{
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union lp_rast_cmd_arg arg;
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arg.triangle.tri = triangle;
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arg.triangle.plane_mask = x | (y << 8);
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_state( const struct lp_rast_state *state )
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{
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union lp_rast_cmd_arg arg;
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arg.set_state = state;
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_fence( struct lp_fence *fence )
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{
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union lp_rast_cmd_arg arg;
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arg.fence = fence;
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_clearzs( uint64_t value, uint64_t mask )
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{
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union lp_rast_cmd_arg arg;
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arg.clear_zstencil.value = value;
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arg.clear_zstencil.mask = mask;
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_query( struct llvmpipe_query *pq )
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{
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union lp_rast_cmd_arg arg;
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arg.query_obj = pq;
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return arg;
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}
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static inline union lp_rast_cmd_arg
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lp_rast_arg_null( void )
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{
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union lp_rast_cmd_arg arg;
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arg.set_state = NULL;
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return arg;
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}
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/**
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* Binnable Commands.
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* These get put into bins by the setup code and are called when
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* the bins are executed.
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*/
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#define LP_RAST_OP_CLEAR_COLOR 0x0
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#define LP_RAST_OP_CLEAR_ZSTENCIL 0x1
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#define LP_RAST_OP_TRIANGLE_1 0x2
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#define LP_RAST_OP_TRIANGLE_2 0x3
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#define LP_RAST_OP_TRIANGLE_3 0x4
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#define LP_RAST_OP_TRIANGLE_4 0x5
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#define LP_RAST_OP_TRIANGLE_5 0x6
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#define LP_RAST_OP_TRIANGLE_6 0x7
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#define LP_RAST_OP_TRIANGLE_7 0x8
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#define LP_RAST_OP_TRIANGLE_8 0x9
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#define LP_RAST_OP_TRIANGLE_3_4 0xa
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#define LP_RAST_OP_TRIANGLE_3_16 0xb
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#define LP_RAST_OP_TRIANGLE_4_16 0xc
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#define LP_RAST_OP_SHADE_TILE 0xd
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#define LP_RAST_OP_SHADE_TILE_OPAQUE 0xe
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#define LP_RAST_OP_BEGIN_QUERY 0xf
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#define LP_RAST_OP_END_QUERY 0x10
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#define LP_RAST_OP_SET_STATE 0x11
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#define LP_RAST_OP_TRIANGLE_32_1 0x12
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#define LP_RAST_OP_TRIANGLE_32_2 0x13
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#define LP_RAST_OP_TRIANGLE_32_3 0x14
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#define LP_RAST_OP_TRIANGLE_32_4 0x15
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#define LP_RAST_OP_TRIANGLE_32_5 0x16
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#define LP_RAST_OP_TRIANGLE_32_6 0x17
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#define LP_RAST_OP_TRIANGLE_32_7 0x18
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#define LP_RAST_OP_TRIANGLE_32_8 0x19
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#define LP_RAST_OP_TRIANGLE_32_3_4 0x1a
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#define LP_RAST_OP_TRIANGLE_32_3_16 0x1b
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#define LP_RAST_OP_TRIANGLE_32_4_16 0x1c
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#define LP_RAST_OP_MAX 0x1d
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#define LP_RAST_OP_MASK 0xff
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void
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lp_debug_bins( struct lp_scene *scene );
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void
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lp_debug_draw_bins_by_cmd_length( struct lp_scene *scene );
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void
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lp_debug_draw_bins_by_coverage( struct lp_scene *scene );
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#endif
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