/*
 * Copyright © 2013 Rob Clark <robclark@freedesktop.org>
 * SPDX-License-Identifier: MIT
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#include "fd2_context.h"
#include "fd2_blend.h"
#include "fd2_draw.h"
#include "fd2_emit.h"
#include "fd2_gmem.h"
#include "fd2_program.h"
#include "fd2_query.h"
#include "fd2_rasterizer.h"
#include "fd2_texture.h"
#include "fd2_zsa.h"

static void
fd2_context_destroy(struct pipe_context *pctx) in_dt
{
   fd_context_destroy(pctx);
   free(pctx);
}

static struct pipe_resource *
create_solid_vertexbuf(struct pipe_context *pctx)
{
   /* clang-format off */
   static const float init_shader_const[] = {
      /* for clear/gmem2mem/mem2gmem (vertices): */
      -1.000000f, +1.000000f, +1.000000f,
      +1.000000f, +1.000000f, +1.000000f,
      -1.000000f, -1.000000f, +1.000000f,
      /* for mem2gmem: (tex coords) */
      +0.000000f, +0.000000f,
      +1.000000f, +0.000000f,
      +0.000000f, +1.000000f,
      /* SCREEN_SCISSOR_BR value (must be at 60 byte offset in page) */
      0.0f,
      /* zero indices dummy draw workaround (3 16-bit zeros) */
      0.0f, 0.0f,
   };
   /* clang-format on */

   struct pipe_resource *prsc =
      pipe_buffer_create(pctx->screen, PIPE_BIND_CUSTOM, PIPE_USAGE_IMMUTABLE,
                         sizeof(init_shader_const));
   pipe_buffer_write(pctx, prsc, 0, sizeof(init_shader_const),
                     init_shader_const);
   return prsc;
}

struct pipe_context *
fd2_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
{
   struct fd_screen *screen = fd_screen(pscreen);
   struct fd2_context *fd2_ctx = CALLOC_STRUCT(fd2_context);
   struct pipe_context *pctx;

   if (!fd2_ctx)
      return NULL;

   pctx = &fd2_ctx->base.base;
   pctx->screen = pscreen;

   fd2_ctx->base.flags = flags;
   fd2_ctx->base.dev = fd_device_ref(screen->dev);
   fd2_ctx->base.screen = fd_screen(pscreen);

   pctx->destroy = fd2_context_destroy;
   pctx->create_blend_state = fd2_blend_state_create;
   pctx->create_rasterizer_state = fd2_rasterizer_state_create;
   pctx->create_depth_stencil_alpha_state = fd2_zsa_state_create;

   fd2_draw_init(pctx);
   fd2_gmem_init(pctx);
   fd2_texture_init(pctx);
   fd2_prog_init(pctx);
   fd2_emit_init(pctx);

   pctx = fd_context_init(&fd2_ctx->base, pscreen, priv, flags);
   if (!pctx)
      return NULL;

   /* construct vertex state used for solid ops (clear, and gmem<->mem) */
   fd2_ctx->solid_vertexbuf = create_solid_vertexbuf(pctx);

   fd2_query_context_init(pctx);

   return pctx;
}