/*
 * Copyright 2010 Christoph Bumiller
 *
 * 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 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.
 */

#include "pipe/p_defines.h"
#include "util/u_helpers.h"
#include "util/u_inlines.h"
#include "util/u_transfer.h"

#include "tgsi/tgsi_parse.h"

#include "nvc0_stateobj.h"
#include "nvc0_context.h"

#include "nvc0_3d.xml.h"
#include "nv50/nv50_texture.xml.h"

#include "nouveau/nouveau_gldefs.h"

static INLINE uint32_t
nvc0_colormask(unsigned mask)
{
    uint32_t ret = 0;

    if (mask & PIPE_MASK_R)
        ret |= 0x0001;
    if (mask & PIPE_MASK_G)
        ret |= 0x0010;
    if (mask & PIPE_MASK_B)
        ret |= 0x0100;
    if (mask & PIPE_MASK_A)
        ret |= 0x1000;

    return ret;
}

#define NVC0_BLEND_FACTOR_CASE(a, b) \
   case PIPE_BLENDFACTOR_##a: return NV50_3D_BLEND_FACTOR_##b

static INLINE uint32_t
nvc0_blend_fac(unsigned factor)
{
   switch (factor) {
   NVC0_BLEND_FACTOR_CASE(ONE, ONE);
   NVC0_BLEND_FACTOR_CASE(SRC_COLOR, SRC_COLOR);
   NVC0_BLEND_FACTOR_CASE(SRC_ALPHA, SRC_ALPHA);
   NVC0_BLEND_FACTOR_CASE(DST_ALPHA, DST_ALPHA);
   NVC0_BLEND_FACTOR_CASE(DST_COLOR, DST_COLOR);
   NVC0_BLEND_FACTOR_CASE(SRC_ALPHA_SATURATE, SRC_ALPHA_SATURATE);
   NVC0_BLEND_FACTOR_CASE(CONST_COLOR, CONSTANT_COLOR);
   NVC0_BLEND_FACTOR_CASE(CONST_ALPHA, CONSTANT_ALPHA);
   NVC0_BLEND_FACTOR_CASE(SRC1_COLOR, SRC1_COLOR);
   NVC0_BLEND_FACTOR_CASE(SRC1_ALPHA, SRC1_ALPHA);
   NVC0_BLEND_FACTOR_CASE(ZERO, ZERO);
   NVC0_BLEND_FACTOR_CASE(INV_SRC_COLOR, ONE_MINUS_SRC_COLOR);
   NVC0_BLEND_FACTOR_CASE(INV_SRC_ALPHA, ONE_MINUS_SRC_ALPHA);
   NVC0_BLEND_FACTOR_CASE(INV_DST_ALPHA, ONE_MINUS_DST_ALPHA);
   NVC0_BLEND_FACTOR_CASE(INV_DST_COLOR, ONE_MINUS_DST_COLOR);
   NVC0_BLEND_FACTOR_CASE(INV_CONST_COLOR, ONE_MINUS_CONSTANT_COLOR);
   NVC0_BLEND_FACTOR_CASE(INV_CONST_ALPHA, ONE_MINUS_CONSTANT_ALPHA);
   NVC0_BLEND_FACTOR_CASE(INV_SRC1_COLOR, ONE_MINUS_SRC1_COLOR);
   NVC0_BLEND_FACTOR_CASE(INV_SRC1_ALPHA, ONE_MINUS_SRC1_ALPHA);
   default:
      return NV50_3D_BLEND_FACTOR_ZERO;
   }
}

static void *
nvc0_blend_state_create(struct pipe_context *pipe,
                        const struct pipe_blend_state *cso)
{
   struct nvc0_blend_stateobj *so = CALLOC_STRUCT(nvc0_blend_stateobj);
   int i;
   int r; /* reference */
   uint32_t ms;
   uint8_t blend_en = 0;
   boolean indep_masks = FALSE;
   boolean indep_funcs = FALSE;

   so->pipe = *cso;

   /* check which states actually have differing values */
   if (cso->independent_blend_enable) {
      for (r = 0; r < 8 && !cso->rt[r].blend_enable; ++r);
      blend_en |= 1 << r;
      for (i = r + 1; i < 8; ++i) {
         if (!cso->rt[i].blend_enable)
            continue;
         blend_en |= 1 << i;
         if (cso->rt[i].rgb_func != cso->rt[r].rgb_func ||
             cso->rt[i].rgb_src_factor != cso->rt[r].rgb_src_factor ||
             cso->rt[i].rgb_dst_factor != cso->rt[r].rgb_dst_factor ||
             cso->rt[i].alpha_func != cso->rt[r].alpha_func ||
             cso->rt[i].alpha_src_factor != cso->rt[r].alpha_src_factor ||
             cso->rt[i].alpha_dst_factor != cso->rt[r].alpha_dst_factor) {
            indep_funcs = TRUE;
            break;
         }
      }
      for (; i < 8; ++i)
         blend_en |= (cso->rt[i].blend_enable ? 1 : 0) << i;

      for (i = 1; i < 8; ++i) {
         if (cso->rt[i].colormask != cso->rt[0].colormask) {
            indep_masks = TRUE;
            break;
         }
      }
   } else {
      r = 0;
      if (cso->rt[0].blend_enable)
         blend_en = 0xff;
   }

   if (cso->logicop_enable) {
      SB_BEGIN_3D(so, LOGIC_OP_ENABLE, 2);
      SB_DATA    (so, 1);
      SB_DATA    (so, nvgl_logicop_func(cso->logicop_func));

      SB_IMMED_3D(so, MACRO_BLEND_ENABLES, 0);
   } else {
      SB_IMMED_3D(so, LOGIC_OP_ENABLE, 0);

      SB_IMMED_3D(so, BLEND_INDEPENDENT, indep_funcs);
      SB_IMMED_3D(so, MACRO_BLEND_ENABLES, blend_en);
      if (indep_funcs) {
         for (i = 0; i < 8; ++i) {
            if (cso->rt[i].blend_enable) {
               SB_BEGIN_3D(so, IBLEND_EQUATION_RGB(i), 6);
               SB_DATA    (so, nvgl_blend_eqn(cso->rt[i].rgb_func));
               SB_DATA    (so, nvc0_blend_fac(cso->rt[i].rgb_src_factor));
               SB_DATA    (so, nvc0_blend_fac(cso->rt[i].rgb_dst_factor));
               SB_DATA    (so, nvgl_blend_eqn(cso->rt[i].alpha_func));
               SB_DATA    (so, nvc0_blend_fac(cso->rt[i].alpha_src_factor));
               SB_DATA    (so, nvc0_blend_fac(cso->rt[i].alpha_dst_factor));
            }
         }
      } else
      if (blend_en) {
         SB_BEGIN_3D(so, BLEND_EQUATION_RGB, 5);
         SB_DATA    (so, nvgl_blend_eqn(cso->rt[r].rgb_func));
         SB_DATA    (so, nvc0_blend_fac(cso->rt[r].rgb_src_factor));
         SB_DATA    (so, nvc0_blend_fac(cso->rt[r].rgb_dst_factor));
         SB_DATA    (so, nvgl_blend_eqn(cso->rt[r].alpha_func));
         SB_DATA    (so, nvc0_blend_fac(cso->rt[r].alpha_src_factor));
         SB_BEGIN_3D(so, BLEND_FUNC_DST_ALPHA, 1);
         SB_DATA    (so, nvc0_blend_fac(cso->rt[r].alpha_dst_factor));
      }

      SB_IMMED_3D(so, COLOR_MASK_COMMON, !indep_masks);
      if (indep_masks) {
         SB_BEGIN_3D(so, COLOR_MASK(0), 8);
         for (i = 0; i < 8; ++i)
            SB_DATA(so, nvc0_colormask(cso->rt[i].colormask));
      } else {
         SB_BEGIN_3D(so, COLOR_MASK(0), 1);
         SB_DATA    (so, nvc0_colormask(cso->rt[0].colormask));
      }
   }

   ms = 0;
   if (cso->alpha_to_coverage)
      ms |= NVC0_3D_MULTISAMPLE_CTRL_ALPHA_TO_COVERAGE;
   if (cso->alpha_to_one)
      ms |= NVC0_3D_MULTISAMPLE_CTRL_ALPHA_TO_ONE;

   SB_BEGIN_3D(so, MULTISAMPLE_CTRL, 1);
   SB_DATA    (so, ms);

   assert(so->size <= (sizeof(so->state) / sizeof(so->state[0])));
   return so;
}

static void
nvc0_blend_state_bind(struct pipe_context *pipe, void *hwcso)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->blend = hwcso;
    nvc0->dirty |= NVC0_NEW_BLEND;
}

static void
nvc0_blend_state_delete(struct pipe_context *pipe, void *hwcso)
{
    FREE(hwcso);
}

/* NOTE: ignoring line_last_pixel, using FALSE (set on screen init) */
static void *
nvc0_rasterizer_state_create(struct pipe_context *pipe,
                             const struct pipe_rasterizer_state *cso)
{
    struct nvc0_rasterizer_stateobj *so;
    uint32_t reg;

    so = CALLOC_STRUCT(nvc0_rasterizer_stateobj);
    if (!so)
        return NULL;
    so->pipe = *cso;

    /* Scissor enables are handled in scissor state, we will not want to
     * always emit 16 commands, one for each scissor rectangle, here.
     */
    
    SB_BEGIN_3D(so, SHADE_MODEL, 1);
    SB_DATA    (so, cso->flatshade ? NVC0_3D_SHADE_MODEL_FLAT :
                                     NVC0_3D_SHADE_MODEL_SMOOTH);
    SB_IMMED_3D(so, PROVOKING_VERTEX_LAST, !cso->flatshade_first);
    SB_IMMED_3D(so, VERTEX_TWO_SIDE_ENABLE, cso->light_twoside);

    SB_IMMED_3D(so, VERT_COLOR_CLAMP_EN, cso->clamp_vertex_color);
    SB_BEGIN_3D(so, FRAG_COLOR_CLAMP_EN, 1);
    SB_DATA    (so, cso->clamp_fragment_color ? 0x11111111 : 0x00000000);

    SB_IMMED_3D(so, MULTISAMPLE_ENABLE, cso->multisample);

    SB_IMMED_3D(so, LINE_SMOOTH_ENABLE, cso->line_smooth);
    if (cso->line_smooth)
       SB_BEGIN_3D(so, LINE_WIDTH_SMOOTH, 1);
    else
       SB_BEGIN_3D(so, LINE_WIDTH_ALIASED, 1);
    SB_DATA    (so, fui(cso->line_width));

    SB_IMMED_3D(so, LINE_STIPPLE_ENABLE, cso->line_stipple_enable);
    if (cso->line_stipple_enable) {
        SB_BEGIN_3D(so, LINE_STIPPLE_PATTERN, 1);
        SB_DATA    (so, (cso->line_stipple_pattern << 8) |
                         cso->line_stipple_factor);
                    
    }

    SB_IMMED_3D(so, VP_POINT_SIZE_EN, cso->point_size_per_vertex);
    if (!cso->point_size_per_vertex) {
       SB_BEGIN_3D(so, POINT_SIZE, 1);
       SB_DATA    (so, fui(cso->point_size));
    }

    reg = (cso->sprite_coord_mode == PIPE_SPRITE_COORD_UPPER_LEFT) ?
       NVC0_3D_POINT_COORD_REPLACE_COORD_ORIGIN_UPPER_LEFT :
       NVC0_3D_POINT_COORD_REPLACE_COORD_ORIGIN_LOWER_LEFT;

    SB_BEGIN_3D(so, POINT_COORD_REPLACE, 1);
    SB_DATA    (so, ((cso->sprite_coord_enable & 0xff) << 3) | reg);
    SB_IMMED_3D(so, POINT_SPRITE_ENABLE, cso->point_quad_rasterization);
    SB_IMMED_3D(so, POINT_SMOOTH_ENABLE, cso->point_smooth);

    SB_BEGIN_3D(so, MACRO_POLYGON_MODE_FRONT, 1);
    SB_DATA    (so, nvgl_polygon_mode(cso->fill_front));
    SB_BEGIN_3D(so, MACRO_POLYGON_MODE_BACK, 1);
    SB_DATA    (so, nvgl_polygon_mode(cso->fill_back));
    SB_IMMED_3D(so, POLYGON_SMOOTH_ENABLE, cso->poly_smooth);

    SB_BEGIN_3D(so, CULL_FACE_ENABLE, 3);
    SB_DATA    (so, cso->cull_face != PIPE_FACE_NONE);
    SB_DATA    (so, cso->front_ccw ? NVC0_3D_FRONT_FACE_CCW :
                                     NVC0_3D_FRONT_FACE_CW);
    switch (cso->cull_face) {
    case PIPE_FACE_FRONT_AND_BACK:
       SB_DATA(so, NVC0_3D_CULL_FACE_FRONT_AND_BACK);
       break;
    case PIPE_FACE_FRONT:
       SB_DATA(so, NVC0_3D_CULL_FACE_FRONT);
       break;
    case PIPE_FACE_BACK:
    default:
       SB_DATA(so, NVC0_3D_CULL_FACE_BACK);
       break;
    }

    SB_IMMED_3D(so, POLYGON_STIPPLE_ENABLE, cso->poly_stipple_enable);
    SB_BEGIN_3D(so, POLYGON_OFFSET_POINT_ENABLE, 3);
    SB_DATA    (so, cso->offset_point);
    SB_DATA    (so, cso->offset_line);
    SB_DATA    (so, cso->offset_tri);

    if (cso->offset_point || cso->offset_line || cso->offset_tri) {
        SB_BEGIN_3D(so, POLYGON_OFFSET_FACTOR, 1);
        SB_DATA    (so, fui(cso->offset_scale));
        SB_BEGIN_3D(so, POLYGON_OFFSET_UNITS, 1);
        SB_DATA    (so, fui(cso->offset_units * 2.0f));
        SB_BEGIN_3D(so, POLYGON_OFFSET_CLAMP, 1);
        SB_DATA    (so, fui(cso->offset_clamp));
    }

    if (cso->depth_clip)
       reg = NVC0_3D_VIEW_VOLUME_CLIP_CTRL_UNK1_UNK1;
    else
       reg =
          NVC0_3D_VIEW_VOLUME_CLIP_CTRL_UNK1_UNK1 |
          NVC0_3D_VIEW_VOLUME_CLIP_CTRL_DEPTH_CLAMP_NEAR |
          NVC0_3D_VIEW_VOLUME_CLIP_CTRL_DEPTH_CLAMP_FAR |
          NVC0_3D_VIEW_VOLUME_CLIP_CTRL_UNK12_UNK2;

    SB_BEGIN_3D(so, VIEW_VOLUME_CLIP_CTRL, 1);
    SB_DATA    (so, reg);

    assert(so->size <= (sizeof(so->state) / sizeof(so->state[0])));
    return (void *)so;
}

static void
nvc0_rasterizer_state_bind(struct pipe_context *pipe, void *hwcso)
{
   struct nvc0_context *nvc0 = nvc0_context(pipe);

   nvc0->rast = hwcso;
   nvc0->dirty |= NVC0_NEW_RASTERIZER;
}

static void
nvc0_rasterizer_state_delete(struct pipe_context *pipe, void *hwcso)
{
   FREE(hwcso);
}

static void *
nvc0_zsa_state_create(struct pipe_context *pipe,
                      const struct pipe_depth_stencil_alpha_state *cso)
{
   struct nvc0_zsa_stateobj *so = CALLOC_STRUCT(nvc0_zsa_stateobj);

   so->pipe = *cso;

   SB_IMMED_3D(so, DEPTH_TEST_ENABLE, cso->depth.enabled);
   if (cso->depth.enabled) {
      SB_IMMED_3D(so, DEPTH_WRITE_ENABLE, cso->depth.writemask);
      SB_BEGIN_3D(so, DEPTH_TEST_FUNC, 1);
      SB_DATA    (so, nvgl_comparison_op(cso->depth.func));
   }

   if (cso->stencil[0].enabled) {
      SB_BEGIN_3D(so, STENCIL_ENABLE, 5);
      SB_DATA    (so, 1);
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[0].fail_op));
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[0].zfail_op));
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[0].zpass_op));
      SB_DATA    (so, nvgl_comparison_op(cso->stencil[0].func));
      SB_BEGIN_3D(so, STENCIL_FRONT_FUNC_MASK, 2);
      SB_DATA    (so, cso->stencil[0].valuemask);
      SB_DATA    (so, cso->stencil[0].writemask);
   } else {
      SB_IMMED_3D(so, STENCIL_ENABLE, 0);
   }

   if (cso->stencil[1].enabled) {
      assert(cso->stencil[0].enabled);
      SB_BEGIN_3D(so, STENCIL_TWO_SIDE_ENABLE, 5);
      SB_DATA    (so, 1);
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[1].fail_op));
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[1].zfail_op));
      SB_DATA    (so, nvgl_stencil_op(cso->stencil[1].zpass_op));
      SB_DATA    (so, nvgl_comparison_op(cso->stencil[1].func));
      SB_BEGIN_3D(so, STENCIL_BACK_MASK, 2);
      SB_DATA    (so, cso->stencil[1].writemask);
      SB_DATA    (so, cso->stencil[1].valuemask);
   } else
   if (cso->stencil[0].enabled) {
      SB_IMMED_3D(so, STENCIL_TWO_SIDE_ENABLE, 0);
   }

   SB_IMMED_3D(so, ALPHA_TEST_ENABLE, cso->alpha.enabled);
   if (cso->alpha.enabled) {
      SB_BEGIN_3D(so, ALPHA_TEST_REF, 2);
      SB_DATA    (so, fui(cso->alpha.ref_value));
      SB_DATA    (so, nvgl_comparison_op(cso->alpha.func));
   }

   assert(so->size <= (sizeof(so->state) / sizeof(so->state[0])));
   return (void *)so;
}

static void
nvc0_zsa_state_bind(struct pipe_context *pipe, void *hwcso)
{
   struct nvc0_context *nvc0 = nvc0_context(pipe);

   nvc0->zsa = hwcso;
   nvc0->dirty |= NVC0_NEW_ZSA;
}

static void
nvc0_zsa_state_delete(struct pipe_context *pipe, void *hwcso)
{
   FREE(hwcso);
}

/* ====================== SAMPLERS AND TEXTURES ================================
 */

#define NV50_TSC_WRAP_CASE(n) \
    case PIPE_TEX_WRAP_##n: return NV50_TSC_WRAP_##n

static INLINE unsigned
nv50_tsc_wrap_mode(unsigned wrap)
{
   switch (wrap) {
   NV50_TSC_WRAP_CASE(REPEAT);
   NV50_TSC_WRAP_CASE(MIRROR_REPEAT);
   NV50_TSC_WRAP_CASE(CLAMP_TO_EDGE);
   NV50_TSC_WRAP_CASE(CLAMP_TO_BORDER);
   NV50_TSC_WRAP_CASE(CLAMP);
   NV50_TSC_WRAP_CASE(MIRROR_CLAMP_TO_EDGE);
   NV50_TSC_WRAP_CASE(MIRROR_CLAMP_TO_BORDER);
   NV50_TSC_WRAP_CASE(MIRROR_CLAMP);
   default:
       NOUVEAU_ERR("unknown wrap mode: %d\n", wrap);
       return NV50_TSC_WRAP_REPEAT;
   }
}

static void
nvc0_sampler_state_delete(struct pipe_context *pipe, void *hwcso)
{
   unsigned s, i;

   for (s = 0; s < 5; ++s)
      for (i = 0; i < nvc0_context(pipe)->num_samplers[s]; ++i)
         if (nvc0_context(pipe)->samplers[s][i] == hwcso)
            nvc0_context(pipe)->samplers[s][i] = NULL;

   nvc0_screen_tsc_free(nvc0_context(pipe)->screen, nv50_tsc_entry(hwcso));

   FREE(hwcso);
}

static INLINE void
nvc0_stage_sampler_states_bind(struct nvc0_context *nvc0, int s,
                               unsigned nr, void **hwcso)
{
   unsigned i;

   for (i = 0; i < nr; ++i) {
      struct nv50_tsc_entry *old = nvc0->samplers[s][i];

      if (hwcso[i] == old)
         continue;
      nvc0->samplers_dirty[s] |= 1 << i;

      nvc0->samplers[s][i] = nv50_tsc_entry(hwcso[i]);
      if (old)
         nvc0_screen_tsc_unlock(nvc0->screen, old);
   }
   for (; i < nvc0->num_samplers[s]; ++i) {
      if (nvc0->samplers[s][i]) {
         nvc0_screen_tsc_unlock(nvc0->screen, nvc0->samplers[s][i]);
         nvc0->samplers[s][i] = NULL;
      }
   }

   nvc0->num_samplers[s] = nr;

   nvc0->dirty |= NVC0_NEW_SAMPLERS;
}

static void
nvc0_vp_sampler_states_bind(struct pipe_context *pipe, unsigned nr, void **s)
{
   nvc0_stage_sampler_states_bind(nvc0_context(pipe), 0, nr, s);
}

static void
nvc0_fp_sampler_states_bind(struct pipe_context *pipe, unsigned nr, void **s)
{
   nvc0_stage_sampler_states_bind(nvc0_context(pipe), 4, nr, s);
}

static void
nvc0_gp_sampler_states_bind(struct pipe_context *pipe, unsigned nr, void **s)
{
   nvc0_stage_sampler_states_bind(nvc0_context(pipe), 3, nr, s);
}

/* NOTE: only called when not referenced anywhere, won't be bound */
static void
nvc0_sampler_view_destroy(struct pipe_context *pipe,
                          struct pipe_sampler_view *view)
{
   pipe_resource_reference(&view->texture, NULL);

   nvc0_screen_tic_free(nvc0_context(pipe)->screen, nv50_tic_entry(view));

   FREE(nv50_tic_entry(view));
}

static INLINE void
nvc0_stage_set_sampler_views(struct nvc0_context *nvc0, int s,
                             unsigned nr,
                             struct pipe_sampler_view **views)
{
   unsigned i;

   for (i = 0; i < nr; ++i) {
      struct nv50_tic_entry *old = nv50_tic_entry(nvc0->textures[s][i]);

      if (views[i] == nvc0->textures[s][i])
         continue;
      nvc0->textures_dirty[s] |= 1 << i;

      if (old) {
         nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_TEX(s, i));
         nvc0_screen_tic_unlock(nvc0->screen, old);
      }

      pipe_sampler_view_reference(&nvc0->textures[s][i], views[i]);
   }

   for (i = nr; i < nvc0->num_textures[s]; ++i) {
      struct nv50_tic_entry *old = nv50_tic_entry(nvc0->textures[s][i]);
      if (old) {
         nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_TEX(s, i));
         nvc0_screen_tic_unlock(nvc0->screen, old);
         pipe_sampler_view_reference(&nvc0->textures[s][i], NULL);
      }
   }

   nvc0->num_textures[s] = nr;

   nvc0->dirty |= NVC0_NEW_TEXTURES;
}

static void
nvc0_vp_set_sampler_views(struct pipe_context *pipe,
                          unsigned nr,
                          struct pipe_sampler_view **views)
{
   nvc0_stage_set_sampler_views(nvc0_context(pipe), 0, nr, views);
}

static void
nvc0_fp_set_sampler_views(struct pipe_context *pipe,
                          unsigned nr,
                          struct pipe_sampler_view **views)
{
   nvc0_stage_set_sampler_views(nvc0_context(pipe), 4, nr, views);
}

static void
nvc0_gp_set_sampler_views(struct pipe_context *pipe,
                          unsigned nr,
                          struct pipe_sampler_view **views)
{
   nvc0_stage_set_sampler_views(nvc0_context(pipe), 3, nr, views);
}

/* ============================= SHADERS =======================================
 */

static void *
nvc0_sp_state_create(struct pipe_context *pipe,
                     const struct pipe_shader_state *cso, unsigned type)
{
   struct nvc0_program *prog;

   prog = CALLOC_STRUCT(nvc0_program);
   if (!prog)
      return NULL;

   prog->type = type;

   if (cso->tokens)
      prog->pipe.tokens = tgsi_dup_tokens(cso->tokens);

   if (cso->stream_output.num_outputs)
      prog->pipe.stream_output = cso->stream_output;

   return (void *)prog;
}

static void
nvc0_sp_state_delete(struct pipe_context *pipe, void *hwcso)
{
   struct nvc0_program *prog = (struct nvc0_program *)hwcso;

   nvc0_program_destroy(nvc0_context(pipe), prog);

   FREE((void *)prog->pipe.tokens);
   FREE(prog);
}

static void *
nvc0_vp_state_create(struct pipe_context *pipe,
                     const struct pipe_shader_state *cso)
{
   return nvc0_sp_state_create(pipe, cso, PIPE_SHADER_VERTEX);
}

static void
nvc0_vp_state_bind(struct pipe_context *pipe, void *hwcso)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->vertprog = hwcso;
    nvc0->dirty |= NVC0_NEW_VERTPROG;
}

static void *
nvc0_fp_state_create(struct pipe_context *pipe,
                     const struct pipe_shader_state *cso)
{
   return nvc0_sp_state_create(pipe, cso, PIPE_SHADER_FRAGMENT);
}

static void
nvc0_fp_state_bind(struct pipe_context *pipe, void *hwcso)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->fragprog = hwcso;
    nvc0->dirty |= NVC0_NEW_FRAGPROG;
}

static void *
nvc0_gp_state_create(struct pipe_context *pipe,
                     const struct pipe_shader_state *cso)
{
   return nvc0_sp_state_create(pipe, cso, PIPE_SHADER_GEOMETRY);
}

static void
nvc0_gp_state_bind(struct pipe_context *pipe, void *hwcso)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->gmtyprog = hwcso;
    nvc0->dirty |= NVC0_NEW_GMTYPROG;
}

static void
nvc0_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
                         struct pipe_constant_buffer *cb)
{
   struct nvc0_context *nvc0 = nvc0_context(pipe);
   struct pipe_resource *res = cb ? cb->buffer : NULL;
   const unsigned s = nvc0_shader_stage(shader);
   const unsigned i = index;

   if (shader == PIPE_SHADER_COMPUTE)
      return;

   if (nvc0->constbuf[s][i].user)
      nvc0->constbuf[s][i].u.buf = NULL;
   else
   if (nvc0->constbuf[s][i].u.buf)
      nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_CB(s, i));

   pipe_resource_reference(&nvc0->constbuf[s][i].u.buf, res);

   nvc0->constbuf[s][i].user = (cb && cb->user_buffer) ? TRUE : FALSE;
   if (nvc0->constbuf[s][i].user) {
      nvc0->constbuf[s][i].u.data = cb->user_buffer;
      nvc0->constbuf[s][i].size = cb->buffer_size;
   } else
   if (cb) {
      nvc0->constbuf[s][i].offset = cb->buffer_offset;
      nvc0->constbuf[s][i].size = align(cb->buffer_size, 0x100);
   }

   nvc0->constbuf_dirty[s] |= 1 << i;

   nvc0->dirty |= NVC0_NEW_CONSTBUF;
}

/* =============================================================================
 */

static void
nvc0_set_blend_color(struct pipe_context *pipe,
                     const struct pipe_blend_color *bcol)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->blend_colour = *bcol;
    nvc0->dirty |= NVC0_NEW_BLEND_COLOUR;
}

static void
nvc0_set_stencil_ref(struct pipe_context *pipe,
                     const struct pipe_stencil_ref *sr)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->stencil_ref = *sr;
    nvc0->dirty |= NVC0_NEW_STENCIL_REF;
}

static void
nvc0_set_clip_state(struct pipe_context *pipe,
                    const struct pipe_clip_state *clip)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    memcpy(nvc0->clip.ucp, clip->ucp, sizeof(clip->ucp));

    nvc0->dirty |= NVC0_NEW_CLIP;
}

static void
nvc0_set_sample_mask(struct pipe_context *pipe, unsigned sample_mask)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->sample_mask = sample_mask;
    nvc0->dirty |= NVC0_NEW_SAMPLE_MASK;
}


static void
nvc0_set_framebuffer_state(struct pipe_context *pipe,
                           const struct pipe_framebuffer_state *fb)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);
    unsigned i;

    nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_FB);

    for (i = 0; i < fb->nr_cbufs; ++i)
       pipe_surface_reference(&nvc0->framebuffer.cbufs[i], fb->cbufs[i]);
    for (; i < nvc0->framebuffer.nr_cbufs; ++i)
       pipe_surface_reference(&nvc0->framebuffer.cbufs[i], NULL);

    nvc0->framebuffer.nr_cbufs = fb->nr_cbufs;

    nvc0->framebuffer.width = fb->width;
    nvc0->framebuffer.height = fb->height;

    pipe_surface_reference(&nvc0->framebuffer.zsbuf, fb->zsbuf);

    nvc0->dirty |= NVC0_NEW_FRAMEBUFFER;
}

static void
nvc0_set_polygon_stipple(struct pipe_context *pipe,
                         const struct pipe_poly_stipple *stipple)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->stipple = *stipple;
    nvc0->dirty |= NVC0_NEW_STIPPLE;
}

static void
nvc0_set_scissor_state(struct pipe_context *pipe,
                       const struct pipe_scissor_state *scissor)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->scissor = *scissor;
    nvc0->dirty |= NVC0_NEW_SCISSOR;
}

static void
nvc0_set_viewport_state(struct pipe_context *pipe,
                        const struct pipe_viewport_state *vpt)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->viewport = *vpt;
    nvc0->dirty |= NVC0_NEW_VIEWPORT;
}

static void
nvc0_set_vertex_buffers(struct pipe_context *pipe,
                        unsigned start_slot, unsigned count,
                        const struct pipe_vertex_buffer *vb)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);
    unsigned i;

    util_set_vertex_buffers_count(nvc0->vtxbuf, &nvc0->num_vtxbufs, vb,
                                  start_slot, count);

    if (!vb) {
       nvc0->vbo_user &= ~(((1ull << count) - 1) << start_slot);
       nvc0->constant_vbos &= ~(((1ull << count) - 1) << start_slot);
       return;
    }

    for (i = 0; i < count; ++i) {
       unsigned dst_index = start_slot + i;

       if (vb[i].user_buffer) {
          nvc0->vbo_user |= 1 << dst_index;
          if (!vb[i].stride)
             nvc0->constant_vbos |= 1 << dst_index;
          else
             nvc0->constant_vbos &= ~(1 << dst_index);
       } else {
          nvc0->vbo_user &= ~(1 << dst_index);
          nvc0->constant_vbos &= ~(1 << dst_index);
       }
    }

    nvc0->dirty |= NVC0_NEW_ARRAYS;
    nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_VTX);
}

static void
nvc0_set_index_buffer(struct pipe_context *pipe,
                      const struct pipe_index_buffer *ib)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    if (nvc0->idxbuf.buffer)
       nouveau_bufctx_reset(nvc0->bufctx_3d, NVC0_BIND_IDX);

    if (ib) {
       pipe_resource_reference(&nvc0->idxbuf.buffer, ib->buffer);
       nvc0->idxbuf.index_size = ib->index_size;
       if (ib->buffer) {
          nvc0->idxbuf.offset = ib->offset;
          nvc0->dirty |= NVC0_NEW_IDXBUF;
       } else {
          nvc0->idxbuf.user_buffer = ib->user_buffer;
          nvc0->dirty &= ~NVC0_NEW_IDXBUF;
       }
    } else {
       nvc0->dirty &= ~NVC0_NEW_IDXBUF;
       pipe_resource_reference(&nvc0->idxbuf.buffer, NULL);
    }
}

static void
nvc0_vertex_state_bind(struct pipe_context *pipe, void *hwcso)
{
    struct nvc0_context *nvc0 = nvc0_context(pipe);

    nvc0->vertex = hwcso;
    nvc0->dirty |= NVC0_NEW_VERTEX;
}

static struct pipe_stream_output_target *
nvc0_so_target_create(struct pipe_context *pipe,
                      struct pipe_resource *res,
                      unsigned offset, unsigned size)
{
   struct nvc0_so_target *targ = MALLOC_STRUCT(nvc0_so_target);
   if (!targ)
      return NULL;

   targ->pq = pipe->create_query(pipe, NVC0_QUERY_TFB_BUFFER_OFFSET);
   if (!targ->pq) {
      FREE(targ);
      return NULL;
   }
   targ->clean = TRUE;

   targ->pipe.buffer_size = size;
   targ->pipe.buffer_offset = offset;
   targ->pipe.context = pipe;
   targ->pipe.buffer = NULL;
   pipe_resource_reference(&targ->pipe.buffer, res);
   pipe_reference_init(&targ->pipe.reference, 1);

   return &targ->pipe;
}

static void
nvc0_so_target_destroy(struct pipe_context *pipe,
                       struct pipe_stream_output_target *ptarg)
{
   struct nvc0_so_target *targ = nvc0_so_target(ptarg);
   pipe->destroy_query(pipe, targ->pq);
   pipe_resource_reference(&targ->pipe.buffer, NULL);
   FREE(targ);
}

static void
nvc0_set_transform_feedback_targets(struct pipe_context *pipe,
                                    unsigned num_targets,
                                    struct pipe_stream_output_target **targets,
                                    unsigned append_mask)
{
   struct nvc0_context *nvc0 = nvc0_context(pipe);
   unsigned i;
   boolean serialize = TRUE;

   assert(num_targets <= 4);

   for (i = 0; i < num_targets; ++i) {
      if (nvc0->tfbbuf[i] == targets[i] && (append_mask & (1 << i)))
         continue;
      nvc0->tfbbuf_dirty |= 1 << i;

      if (nvc0->tfbbuf[i] && nvc0->tfbbuf[i] != targets[i])
         nvc0_so_target_save_offset(pipe, nvc0->tfbbuf[i], i, &serialize);

      if (targets[i] && !(append_mask & (1 << i)))
         nvc0_so_target(targets[i])->clean = TRUE;

      pipe_so_target_reference(&nvc0->tfbbuf[i], targets[i]);
   }
   for (; i < nvc0->num_tfbbufs; ++i) {
      nvc0->tfbbuf_dirty |= 1 << i;
      nvc0_so_target_save_offset(pipe, nvc0->tfbbuf[i], i, &serialize);
      pipe_so_target_reference(&nvc0->tfbbuf[i], NULL);
   }
   nvc0->num_tfbbufs = num_targets;

   if (nvc0->tfbbuf_dirty)
      nvc0->dirty |= NVC0_NEW_TFB_TARGETS;
}

void
nvc0_init_state_functions(struct nvc0_context *nvc0)
{
   struct pipe_context *pipe = &nvc0->base.pipe;

   pipe->create_blend_state = nvc0_blend_state_create;
   pipe->bind_blend_state = nvc0_blend_state_bind;
   pipe->delete_blend_state = nvc0_blend_state_delete;

   pipe->create_rasterizer_state = nvc0_rasterizer_state_create;
   pipe->bind_rasterizer_state = nvc0_rasterizer_state_bind;
   pipe->delete_rasterizer_state = nvc0_rasterizer_state_delete;

   pipe->create_depth_stencil_alpha_state = nvc0_zsa_state_create;
   pipe->bind_depth_stencil_alpha_state = nvc0_zsa_state_bind;
   pipe->delete_depth_stencil_alpha_state = nvc0_zsa_state_delete;

   pipe->create_sampler_state = nv50_sampler_state_create;
   pipe->delete_sampler_state = nvc0_sampler_state_delete;
   pipe->bind_vertex_sampler_states   = nvc0_vp_sampler_states_bind;
   pipe->bind_fragment_sampler_states = nvc0_fp_sampler_states_bind;
   pipe->bind_geometry_sampler_states = nvc0_gp_sampler_states_bind;

   pipe->create_sampler_view = nvc0_create_sampler_view;
   pipe->sampler_view_destroy = nvc0_sampler_view_destroy;
   pipe->set_vertex_sampler_views   = nvc0_vp_set_sampler_views;
   pipe->set_fragment_sampler_views = nvc0_fp_set_sampler_views;
   pipe->set_geometry_sampler_views = nvc0_gp_set_sampler_views;

   pipe->create_vs_state = nvc0_vp_state_create;
   pipe->create_fs_state = nvc0_fp_state_create;
   pipe->create_gs_state = nvc0_gp_state_create;
   pipe->bind_vs_state = nvc0_vp_state_bind;
   pipe->bind_fs_state = nvc0_fp_state_bind;
   pipe->bind_gs_state = nvc0_gp_state_bind;
   pipe->delete_vs_state = nvc0_sp_state_delete;
   pipe->delete_fs_state = nvc0_sp_state_delete;
   pipe->delete_gs_state = nvc0_sp_state_delete;

   pipe->set_blend_color = nvc0_set_blend_color;
   pipe->set_stencil_ref = nvc0_set_stencil_ref;
   pipe->set_clip_state = nvc0_set_clip_state;
   pipe->set_sample_mask = nvc0_set_sample_mask;
   pipe->set_constant_buffer = nvc0_set_constant_buffer;
   pipe->set_framebuffer_state = nvc0_set_framebuffer_state;
   pipe->set_polygon_stipple = nvc0_set_polygon_stipple;
   pipe->set_scissor_state = nvc0_set_scissor_state;
   pipe->set_viewport_state = nvc0_set_viewport_state;

   pipe->create_vertex_elements_state = nvc0_vertex_state_create;
   pipe->delete_vertex_elements_state = nvc0_vertex_state_delete;
   pipe->bind_vertex_elements_state = nvc0_vertex_state_bind;

   pipe->set_vertex_buffers = nvc0_set_vertex_buffers;
   pipe->set_index_buffer = nvc0_set_index_buffer;

   pipe->create_stream_output_target = nvc0_so_target_create;
   pipe->stream_output_target_destroy = nvc0_so_target_destroy;
   pipe->set_stream_output_targets = nvc0_set_transform_feedback_targets;
}