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+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * Private data structures, etc for the draw module.
+ */
+
+
+/**
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul
+ */
+
+
+#ifndef DRAW_PRIVATE_H
+#define DRAW_PRIVATE_H
+
+
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+#include "tgsi/tgsi_scan.h"
+
+#ifdef HAVE_LLVM
+#include <llvm-c/ExecutionEngine.h>
+#endif
+
+
+struct pipe_context;
+struct draw_vertex_shader;
+struct draw_context;
+struct draw_stage;
+struct vbuf_render;
+struct tgsi_exec_machine;
+struct tgsi_sampler;
+
+
+/**
+ * Basic vertex info.
+ * Carry some useful information around with the vertices in the prim pipe.
+ */
+struct vertex_header {
+ unsigned clipmask:12;
+ unsigned edgeflag:1;
+ unsigned pad:3;
+ unsigned vertex_id:16;
+
+ float clip[4];
+
+ /* This will probably become float (*data)[4] soon:
+ */
+ float data[][4];
+};
+
+/* NOTE: It should match vertex_id size above */
+#define UNDEFINED_VERTEX_ID 0xffff
+
+
+/**
+ * Private context for the drawing module.
+ */
+struct draw_context
+{
+ struct pipe_context *pipe;
+
+ /** Drawing/primitive pipeline stages */
+ struct {
+ struct draw_stage *first; /**< one of the following */
+
+ struct draw_stage *validate;
+
+ /* stages (in logical order) */
+ struct draw_stage *flatshade;
+ struct draw_stage *clip;
+ struct draw_stage *cull;
+ struct draw_stage *twoside;
+ struct draw_stage *offset;
+ struct draw_stage *unfilled;
+ struct draw_stage *stipple;
+ struct draw_stage *aapoint;
+ struct draw_stage *aaline;
+ struct draw_stage *pstipple;
+ struct draw_stage *wide_line;
+ struct draw_stage *wide_point;
+ struct draw_stage *rasterize;
+
+ float wide_point_threshold; /**< convert pnts to tris if larger than this */
+ float wide_line_threshold; /**< convert lines to tris if wider than this */
+ boolean wide_point_sprites; /**< convert points to tris for sprite mode */
+ boolean line_stipple; /**< do line stipple? */
+ boolean point_sprite; /**< convert points to quads for sprites? */
+
+ /* Temporary storage while the pipeline is being run:
+ */
+ char *verts;
+ unsigned vertex_stride;
+ unsigned vertex_count;
+ } pipeline;
+
+
+ struct vbuf_render *render;
+
+ /* Support prototype passthrough path:
+ */
+ struct {
+ struct {
+ struct draw_pt_middle_end *fetch_emit;
+ struct draw_pt_middle_end *fetch_shade_emit;
+ struct draw_pt_middle_end *general;
+ struct draw_pt_middle_end *llvm;
+ } middle;
+
+ struct {
+ struct draw_pt_front_end *vcache;
+ struct draw_pt_front_end *varray;
+ } front;
+
+ struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
+ unsigned nr_vertex_buffers;
+
+ struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
+ unsigned nr_vertex_elements;
+
+ /* user-space vertex data, buffers */
+ struct {
+ /** vertex element/index buffer (ex: glDrawElements) */
+ const void *elts;
+ /** bytes per index (0, 1, 2 or 4) */
+ unsigned eltSize;
+ int eltBias;
+ unsigned min_index;
+ unsigned max_index;
+
+ /** vertex arrays */
+ const void *vbuffer[PIPE_MAX_ATTRIBS];
+
+ /** constant buffer (for vertex/geometry shader) */
+ const void *vs_constants[PIPE_MAX_CONSTANT_BUFFERS];
+ const void *gs_constants[PIPE_MAX_CONSTANT_BUFFERS];
+ } user;
+
+ boolean test_fse; /* enable FSE even though its not correct (eg for softpipe) */
+ boolean no_fse; /* disable FSE even when it is correct */
+ } pt;
+
+ struct {
+ boolean bypass_clipping;
+ boolean bypass_vs;
+ } driver;
+
+ boolean flushing; /**< debugging/sanity */
+ boolean suspend_flushing; /**< internally set */
+ boolean bypass_clipping; /**< set if either api or driver bypass_clipping true */
+
+ boolean force_passthrough; /**< never clip or shade */
+
+ boolean dump_vs;
+
+ double mrd; /**< minimum resolvable depth value, for polygon offset */
+
+ /** Current rasterizer state given to us by the driver */
+ const struct pipe_rasterizer_state *rasterizer;
+ /** Driver CSO handle for the current rasterizer state */
+ void *rast_handle;
+
+ /** Rasterizer CSOs without culling/stipple/etc */
+ void *rasterizer_no_cull[2][2];
+
+ struct pipe_viewport_state viewport;
+ boolean identity_viewport;
+
+ struct {
+ struct draw_vertex_shader *vertex_shader;
+ uint num_vs_outputs; /**< convenience, from vertex_shader */
+ uint position_output;
+ uint edgeflag_output;
+
+ /** TGSI program interpreter runtime state */
+ struct tgsi_exec_machine *machine;
+
+ uint num_samplers;
+ struct tgsi_sampler **samplers;
+
+ /* Here's another one:
+ */
+ struct aos_machine *aos_machine;
+
+
+ const void *aligned_constants[PIPE_MAX_CONSTANT_BUFFERS];
+
+ const void *aligned_constant_storage[PIPE_MAX_CONSTANT_BUFFERS];
+ unsigned const_storage_size[PIPE_MAX_CONSTANT_BUFFERS];
+
+
+ struct translate *fetch;
+ struct translate_cache *fetch_cache;
+ struct translate *emit;
+ struct translate_cache *emit_cache;
+ } vs;
+
+ struct {
+ struct draw_geometry_shader *geometry_shader;
+ uint num_gs_outputs; /**< convenience, from geometry_shader */
+ uint position_output;
+
+ /** TGSI program interpreter runtime state */
+ struct tgsi_exec_machine *machine;
+
+ uint num_samplers;
+ struct tgsi_sampler **samplers;
+ } gs;
+
+ struct {
+ struct pipe_stream_output_state state;
+ void *buffers[PIPE_MAX_SO_BUFFERS];
+ uint num_buffers;
+ } so;
+
+ /* Clip derived state:
+ */
+ float plane[12][4];
+ unsigned nr_planes;
+
+ /* If a prim stage introduces new vertex attributes, they'll be stored here
+ */
+ struct {
+ uint semantic_name;
+ uint semantic_index;
+ int slot;
+ } extra_shader_outputs;
+
+ unsigned reduced_prim;
+
+ unsigned instance_id;
+
+#ifdef HAVE_LLVM
+ LLVMExecutionEngineRef engine;
+#endif
+
+ void *driver_private;
+};
+
+
+struct draw_fetch_info {
+ boolean linear;
+ unsigned start;
+ const unsigned *elts;
+ unsigned count;
+};
+
+struct draw_vertex_info {
+ struct vertex_header *verts;
+ unsigned vertex_size;
+ unsigned stride;
+ unsigned count;
+};
+
+struct draw_prim_info {
+ boolean linear;
+ unsigned start;
+
+ const ushort *elts;
+ unsigned count;
+
+ unsigned prim;
+ unsigned *primitive_lengths;
+ unsigned primitive_count;
+};
+
+
+/*******************************************************************************
+ * Draw common initialization code
+ */
+boolean draw_init(struct draw_context *draw);
+
+/*******************************************************************************
+ * Vertex shader code:
+ */
+boolean draw_vs_init( struct draw_context *draw );
+void draw_vs_destroy( struct draw_context *draw );
+
+void draw_vs_set_viewport( struct draw_context *,
+ const struct pipe_viewport_state * );
+
+void
+draw_vs_set_constants(struct draw_context *,
+ unsigned slot,
+ const void *constants,
+ unsigned size);
+
+
+
+/*******************************************************************************
+ * Geometry shading code:
+ */
+boolean draw_gs_init( struct draw_context *draw );
+
+void
+draw_gs_set_constants(struct draw_context *,
+ unsigned slot,
+ const void *constants,
+ unsigned size);
+
+void draw_gs_destroy( struct draw_context *draw );
+
+/*******************************************************************************
+ * Common shading code:
+ */
+uint draw_current_shader_outputs(const struct draw_context *draw);
+uint draw_current_shader_position_output(const struct draw_context *draw);
+
+/*******************************************************************************
+ * Vertex processing (was passthrough) code:
+ */
+boolean draw_pt_init( struct draw_context *draw );
+void draw_pt_destroy( struct draw_context *draw );
+void draw_pt_reset_vertex_ids( struct draw_context *draw );
+
+
+/*******************************************************************************
+ * Primitive processing (pipeline) code:
+ */
+
+boolean draw_pipeline_init( struct draw_context *draw );
+void draw_pipeline_destroy( struct draw_context *draw );
+
+
+
+
+
+/* We use the top few bits in the elts[] parameter to convey a little
+ * API information. This limits the number of vertices we can address
+ * to only 4096 -- if that becomes a problem, we can switch to 32-bit
+ * draw indices.
+ *
+ * These flags expected at first vertex of lines & triangles when
+ * unfilled and/or line stipple modes are operational.
+ */
+#define DRAW_PIPE_MAX_VERTICES (0x1<<12)
+#define DRAW_PIPE_EDGE_FLAG_0 (0x1<<12)
+#define DRAW_PIPE_EDGE_FLAG_1 (0x2<<12)
+#define DRAW_PIPE_EDGE_FLAG_2 (0x4<<12)
+#define DRAW_PIPE_EDGE_FLAG_ALL (0x7<<12)
+#define DRAW_PIPE_RESET_STIPPLE (0x8<<12)
+#define DRAW_PIPE_FLAG_MASK (0xf<<12)
+
+void draw_pipeline_run( struct draw_context *draw,
+ const struct draw_vertex_info *vert,
+ const struct draw_prim_info *prim);
+
+void draw_pipeline_run_linear( struct draw_context *draw,
+ const struct draw_vertex_info *vert,
+ const struct draw_prim_info *prim);
+
+
+
+
+void draw_pipeline_flush( struct draw_context *draw,
+ unsigned flags );
+
+
+
+/*******************************************************************************
+ * Flushing
+ */
+
+#define DRAW_FLUSH_STATE_CHANGE 0x8
+#define DRAW_FLUSH_BACKEND 0x10
+
+
+void draw_do_flush( struct draw_context *draw, unsigned flags );
+
+
+
+void *
+draw_get_rasterizer_no_cull( struct draw_context *draw,
+ boolean scissor,
+ boolean flatshade );
+
+
+#endif /* DRAW_PRIVATE_H */
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