/*
 * Copyright © 2017 Intel Corporation
 *
 * 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 */

/**
 * @file iris_draw.c
 *
 * The main driver hooks for drawing and launching compute shaders.
 */

#include <stdio.h>
#include <errno.h>
#include "pipe/p_defines.h"
#include "pipe/p_state.h"
#include "pipe/p_context.h"
#include "pipe/p_screen.h"
#include "util/u_inlines.h"
#include "util/u_transfer.h"
#include "intel/compiler/brw_compiler.h"
#include "iris_context.h"

/**
 * Record the current primitive mode and restart information, flagging
 * related packets as dirty if necessary.
 */
static void
iris_update_draw_info(struct iris_context *ice,
                      const struct pipe_draw_info *info)
{
   if (ice->state.prim_mode != info->mode ||
       ice->state.vertices_per_patch != info->vertices_per_patch) {
      ice->state.prim_mode = info->mode;
      ice->state.vertices_per_patch = info->vertices_per_patch;
      ice->state.dirty |= IRIS_DIRTY_VF_TOPOLOGY;
   }

   if (ice->state.primitive_restart != info->primitive_restart ||
       ice->state.cut_index != info->restart_index) {
      ice->state.dirty |= IRIS_DIRTY_VF;
      ice->state.primitive_restart = info->primitive_restart;
      ice->state.cut_index = info->restart_index;
   }
}

/**
 * The pipe->draw_vbo() driver hook.  Performs a draw on the GPU.
 */
void
iris_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
{
   struct iris_context *ice = (struct iris_context *) ctx;
   struct iris_batch *batch = &ice->render_batch;

   if (unlikely(INTEL_DEBUG & DEBUG_REEMIT))
      ice->state.dirty |= ~0ull;

   iris_batch_maybe_flush(batch, 1500);

   iris_update_draw_info(ice, info);
   iris_update_compiled_shaders(ice);

   iris_predraw_resolve_inputs(ice, batch);
   iris_predraw_resolve_framebuffer(ice, batch);

   iris_binder_reserve_3d(ice);

   ice->vtbl.update_surface_base_address(batch, &ice->state.binder);
   ice->vtbl.upload_render_state(ice, batch, info);

   ice->state.dirty = 0ull;

   iris_postdraw_update_resolve_tracking(ice, batch);
}