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/**************************************************************************

 *

 * Copyright 2009 VMware, Inc.

 * 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 VMWARE 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.

 *

 **************************************************************************/

#ifndef LP_RAST_PRIV_H

#define LP_RAST_PRIV_H

#include "os/os_thread.h"

#include "util/u_format.h"

#include "gallivm/lp_bld_debug.h"

#include "lp_memory.h"

#include "lp_rast.h"

#include "lp_scene.h"

#include "lp_state.h"

#include "lp_texture.h"

#include "lp_limits.h"

#define TILE_VECTOR_HEIGHT 4

#define TILE_VECTOR_WIDTH 4

/* If we crash in a jitted function, we can examine jit_line and jit_state

 * to get some info.  This is not thread-safe, however.

 */

#ifdef DEBUG

struct lp_rasterizer_task;

extern int jit_line;

extern const struct lp_rast_state *jit_state;

extern const struct lp_rasterizer_task *jit_task;

#define BEGIN_JIT_CALL(state, task)                  \

   do { \

      jit_line = __LINE__; \

      jit_state = state; \

      jit_task = task; \

   } while (0)

#define END_JIT_CALL() \

   do { \

      jit_line = 0; \

      jit_state = NULL; \

   } while (0)

#else

#define BEGIN_JIT_CALL(X, Y)

#define END_JIT_CALL()

#endif

struct lp_rasterizer;

struct cmd_bin;

/**

 * Per-thread rasterization state

 */

struct lp_rasterizer_task

{

   const struct cmd_bin *bin;

   const struct lp_rast_state *state;

   struct lp_scene *scene;

   unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */

   unsigned width, height; /**< width, height of current tile, in pixels */

   uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];

   uint8_t *depth_tile;

   /** "back" pointer */

   struct lp_rasterizer *rast;

   /** "my" index */

   unsigned thread_index;

   /* occlude counter for visible pixels */

   struct lp_jit_thread_data thread_data;

   uint64_t ps_invocations;

   pipe_semaphore work_ready;

   pipe_semaphore work_done;

};

/**

 * This is the state required while rasterizing tiles.

 * Note that this contains per-thread information too.

 * The tile size is TILE_SIZE x TILE_SIZE pixels.

 */

struct lp_rasterizer

{

   boolean exit_flag;

   boolean no_rast;  /**< For debugging/profiling */

   /** The incoming queue of scenes ready to rasterize */

   struct lp_scene_queue *full_scenes;

   /** The scene currently being rasterized by the threads */

   struct lp_scene *curr_scene;

   /** A task object for each rasterization thread */

   struct lp_rasterizer_task tasks[LP_MAX_THREADS];

   unsigned num_threads;

   pipe_thread threads[LP_MAX_THREADS];

   /** For synchronizing the rasterization threads */

   pipe_barrier barrier;

};

void

lp_rast_shade_quads_mask(struct lp_rasterizer_task *task,

                         const struct lp_rast_shader_inputs *inputs,

                         unsigned x, unsigned y,

                         unsigned mask);

/**

 * Get pointer to the unswizzled color tile

 */

static INLINE uint8_t *

lp_rast_get_unswizzled_color_tile_pointer(struct lp_rasterizer_task *task,

                                          unsigned buf, enum lp_texture_usage usage)

{

   const struct lp_scene *scene = task->scene;

   unsigned format_bytes;

   assert(task->x < scene->tiles_x * TILE_SIZE);

   assert(task->y < scene->tiles_y * TILE_SIZE);

   assert(task->x % TILE_SIZE == 0);

   assert(task->y % TILE_SIZE == 0);

   assert(buf < scene->fb.nr_cbufs);

   if (!task->color_tiles[buf]) {

      struct pipe_surface *cbuf = scene->fb.cbufs[buf];

      assert(cbuf);

      format_bytes = util_format_get_blocksize(cbuf->format);

      task->color_tiles[buf] = scene->cbufs[buf].map + scene->cbufs[buf].stride * task->y + format_bytes * task->x;

   }

   return task->color_tiles[buf];

}

/**

 * Get pointer to the unswizzled depth tile

 */

static INLINE uint8_t *

lp_rast_get_unswizzled_depth_tile_pointer(struct lp_rasterizer_task *task,

                                          enum lp_texture_usage usage)

{

   const struct lp_scene *scene = task->scene;

   unsigned format_bytes;

   assert(task->x < scene->tiles_x * TILE_SIZE);

   assert(task->y < scene->tiles_y * TILE_SIZE);

   assert(task->x % TILE_SIZE == 0);

   assert(task->y % TILE_SIZE == 0);

   if (!task->depth_tile) {

      struct pipe_surface *dbuf = scene->fb.zsbuf;

      assert(dbuf);

      format_bytes = util_format_get_blocksize(dbuf->format);

      task->depth_tile = scene->zsbuf.map + scene->zsbuf.stride * task->y + format_bytes * task->x;

   }

   return task->depth_tile;

}

/**

 * Get the pointer to an unswizzled 4x4 color block (within an unswizzled 64x64 tile).

 * \param x, y location of 4x4 block in window coords

 */

static INLINE uint8_t *

lp_rast_get_unswizzled_color_block_pointer(struct lp_rasterizer_task *task,

                                           unsigned buf, unsigned x, unsigned y,

                                           unsigned layer)

{

   unsigned px, py, pixel_offset, format_bytes;

   uint8_t *color;

   assert(x < task->scene->tiles_x * TILE_SIZE);

   assert(y < task->scene->tiles_y * TILE_SIZE);

   assert((x % TILE_VECTOR_WIDTH) == 0);

   assert((y % TILE_VECTOR_HEIGHT) == 0);

   assert(buf < task->scene->fb.nr_cbufs);

   format_bytes = util_format_get_blocksize(task->scene->fb.cbufs[buf]->format);

   color = lp_rast_get_unswizzled_color_tile_pointer(task, buf, LP_TEX_USAGE_READ_WRITE);

   assert(color);

   px = x % TILE_SIZE;

   py = y % TILE_SIZE;

   pixel_offset = px * format_bytes + py * task->scene->cbufs[buf].stride;

   color = color + pixel_offset;

   if (layer) {

      color += layer * task->scene->cbufs[buf].layer_stride;

   }

   assert(lp_check_alignment(color, llvmpipe_get_format_alignment(task->scene->fb.cbufs[buf]->format)));

   return color;

}

/**

 * Get the pointer to an unswizzled 4x4 depth block (within an unswizzled 64x64 tile).

 * \param x, y location of 4x4 block in window coords

 */

static INLINE uint8_t *

lp_rast_get_unswizzled_depth_block_pointer(struct lp_rasterizer_task *task,

                                           unsigned x, unsigned y, unsigned layer)

{

   unsigned px, py, pixel_offset, format_bytes;

   uint8_t *depth;

   assert(x < task->scene->tiles_x * TILE_SIZE);

   assert(y < task->scene->tiles_y * TILE_SIZE);

   assert((x % TILE_VECTOR_WIDTH) == 0);

   assert((y % TILE_VECTOR_HEIGHT) == 0);

   format_bytes = util_format_get_blocksize(task->scene->fb.zsbuf->format);

   depth = lp_rast_get_unswizzled_depth_tile_pointer(task, LP_TEX_USAGE_READ_WRITE);

   assert(depth);

   px = x % TILE_SIZE;

   py = y % TILE_SIZE;

   pixel_offset = px * format_bytes + py * task->scene->zsbuf.stride;

   depth = depth + pixel_offset;

   if (layer) {

      depth += layer * task->scene->zsbuf.layer_stride;

   }

   assert(lp_check_alignment(depth, llvmpipe_get_format_alignment(task->scene->fb.zsbuf->format)));

   return depth;

}

/**

 * Shade all pixels in a 4x4 block.  The fragment code omits the

 * triangle in/out tests.

 * \param x, y location of 4x4 block in window coords

 */

static INLINE void

lp_rast_shade_quads_all( struct lp_rasterizer_task *task,

                         const struct lp_rast_shader_inputs *inputs,

                         unsigned x, unsigned y )

{

   const struct lp_scene *scene = task->scene;

   const struct lp_rast_state *state = task->state;

   struct lp_fragment_shader_variant *variant = state->variant;

   uint8_t *color[PIPE_MAX_COLOR_BUFS];

   unsigned stride[PIPE_MAX_COLOR_BUFS];

   uint8_t *depth = NULL;

   unsigned depth_stride = 0;

   unsigned i;

   /* color buffer */

   for (i = 0; i < scene->fb.nr_cbufs; i++) {

      stride[i] = scene->cbufs[i].stride;

      color[i] = lp_rast_get_unswizzled_color_block_pointer(task, i, x, y, inputs->layer);

   }

   if (scene->zsbuf.map) {

      depth = lp_rast_get_unswizzled_depth_block_pointer(task, x, y, inputs->layer);

      depth_stride = scene->zsbuf.stride;

   }

   /*

    * The rasterizer may produce fragments outside our

    * allocated 4x4 blocks hence need to filter them out here.

    */

   if ((x % TILE_SIZE) < task->width && (y % TILE_SIZE) < task->height) {

      /* not very accurate would need a popcount on the mask */

      /* always count this not worth bothering? */

      task->ps_invocations++;

      /* run shader on 4x4 block */

      BEGIN_JIT_CALL(state, task);

      variant->jit_function[RAST_WHOLE]( &state->jit_context,

                                         x, y,

                                         inputs->frontfacing,

                                         GET_A0(inputs),

                                         GET_DADX(inputs),

                                         GET_DADY(inputs),

                                         color,

                                         depth,

                                         0xffff,

                                         &task->thread_data,

                                         stride,

                                         depth_stride);

      END_JIT_CALL();

   }

}

void lp_rast_triangle_1( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_2( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_3( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_4( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_5( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_6( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_7( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_8( struct lp_rasterizer_task *,

                         const union lp_rast_cmd_arg );

void lp_rast_triangle_3_4(struct lp_rasterizer_task *,

			  const union lp_rast_cmd_arg );

void lp_rast_triangle_3_16( struct lp_rasterizer_task *,

                            const union lp_rast_cmd_arg );

void lp_rast_triangle_4_16( struct lp_rasterizer_task *,

                            const union lp_rast_cmd_arg );

void

lp_rast_set_state(struct lp_rasterizer_task *task,

                  const union lp_rast_cmd_arg arg);

void

lp_debug_bin( const struct cmd_bin *bin, int x, int y );

#endif