src/mesa/state_tracker/st_atom.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include <stdio.h>
  30 #include "main/arrayobj.h"
  31 #include "main/glheader.h"
  32 #include "main/context.h"
  33
  34 #include "pipe/p_defines.h"
  35 #include "st_context.h"
  36 #include "st_atom.h"
  37 #include "st_program.h"
  38 #include "st_manager.h"
  39
  40 typedef void (*update_func_t)(struct st_context *st);
  41
  42 /* The list state update functions. */
  43 static const update_func_t update_functions[] =
  44 {
  45 #define ST_STATE(FLAG, st_update) st_update,
  46 #include "st_atom_list.h"
  47 #undef ST_STATE
  48 };
  49
  50
  51 void st_init_atoms( struct st_context *st )
  52 {
  53    STATIC_ASSERT(ARRAY_SIZE(update_functions) <= 64);
  54 }
  55
  56
  57 void st_destroy_atoms( struct st_context *st )
  58 {
  59    /* no-op */
  60 }
  61
  62
  63 /* Too complex to figure out, just check every time:
  64  */
  65 static void check_program_state( struct st_context *st )
  66 {
  67    struct gl_context *ctx = st->ctx;
  68    struct st_vertex_program *old_vp = st->vp;
  69    struct st_common_program *old_tcp = st->tcp;
  70    struct st_common_program *old_tep = st->tep;
  71    struct st_common_program *old_gp = st->gp;
  72    struct st_fragment_program *old_fp = st->fp;
  73
  74    struct gl_program *new_vp = ctx->VertexProgram._Current;
  75    struct gl_program *new_tcp = ctx->TessCtrlProgram._Current;
  76    struct gl_program *new_tep = ctx->TessEvalProgram._Current;
  77    struct gl_program *new_gp = ctx->GeometryProgram._Current;
  78    struct gl_program *new_fp = ctx->FragmentProgram._Current;
  79    uint64_t dirty = 0;
  80    unsigned num_viewports = 1;
  81
  82    /* Flag states used by both new and old shaders to unbind shader resources
  83     * properly when transitioning to shaders that don't use them.
  84     */
  85    if (unlikely(new_vp != &old_vp->Base)) {
  86       if (old_vp)
  87          dirty |= old_vp->affected_states;
  88       if (new_vp)
  89          dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(new_vp));
  90    }
  91
  92    if (unlikely(new_tcp != &old_tcp->Base)) {
  93       if (old_tcp)
  94          dirty |= old_tcp->affected_states;
  95       if (new_tcp)
  96          dirty |= st_common_program(new_tcp)->affected_states;
  97    }
  98
  99    if (unlikely(new_tep != &old_tep->Base)) {
 100       if (old_tep)
 101          dirty |= old_tep->affected_states;
 102       if (new_tep)
 103          dirty |= st_common_program(new_tep)->affected_states;
 104    }
 105
 106    if (unlikely(new_gp != &old_gp->Base)) {
 107       if (old_gp)
 108          dirty |= old_gp->affected_states;
 109       if (new_gp)
 110          dirty |= st_common_program(new_gp)->affected_states;
 111    }
 112
 113    if (unlikely(new_fp != &old_fp->Base)) {
 114       if (old_fp)
 115          dirty |= old_fp->affected_states;
 116       if (new_fp)
 117          dirty |= st_fragment_program(new_fp)->affected_states;
 118    }
 119
 120    /* Find out the number of viewports. This determines how many scissors
 121     * and viewport states we need to update.
 122     */
 123    struct gl_program *last_prim_shader = new_gp ? new_gp :
 124                                          new_tep ? new_tep : new_vp;
 125    if (last_prim_shader &&
 126        last_prim_shader->info.outputs_written & VARYING_BIT_VIEWPORT)
 127       num_viewports = ctx->Const.MaxViewports;
 128
 129    if (st->state.num_viewports != num_viewports) {
 130       st->state.num_viewports = num_viewports;
 131       dirty |= ST_NEW_VIEWPORT;
 132
 133       if (ctx->Scissor.EnableFlags & u_bit_consecutive(0, num_viewports))
 134          dirty |= ST_NEW_SCISSOR;
 135    }
 136
 137    st->dirty |= dirty;
 138 }
 139
 140 static void check_attrib_edgeflag(struct st_context *st)
 141 {
 142    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 143    struct gl_program *vp = st->ctx->VertexProgram._Current;
 144
 145    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 146                        st->ctx->Polygon.BackMode != GL_FILL;
 147
 148    vertdata_edgeflags = edgeflags_enabled &&
 149       _mesa_draw_edge_flag_array_enabled(st->ctx);
 150
 151    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 152       st->vertdata_edgeflags = vertdata_edgeflags;
 153       if (vp)
 154          st->dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(vp));
 155    }
 156
 157    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 158                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 159    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 160       st->edgeflag_culls_prims = edgeflag_culls_prims;
 161       st->dirty |= ST_NEW_RASTERIZER;
 162    }
 163 }
 164
 165
 166 /***********************************************************************
 167  * Update all derived state:
 168  */
 169
 170 void st_validate_state( struct st_context *st, enum st_pipeline pipeline )
 171 {
 172    struct gl_context *ctx = st->ctx;
 173    uint64_t dirty, pipeline_mask;
 174    uint32_t dirty_lo, dirty_hi;
 175
 176    /* Get Mesa driver state.
 177     *
 178     * Inactive states are shader states not used by shaders at the moment.
 179     */
 180    st->dirty |= ctx->NewDriverState & st->active_states & ST_ALL_STATES_MASK;
 181    ctx->NewDriverState = 0;
 182
 183    /* Get pipeline state. */
 184    switch (pipeline) {
 185    case ST_PIPELINE_RENDER:
 186       if (st->ctx->API == API_OPENGL_COMPAT)
 187          check_attrib_edgeflag(st);
 188
 189       if (st->gfx_shaders_may_be_dirty) {
 190          check_program_state(st);
 191          st->gfx_shaders_may_be_dirty = false;
 192       }
 193
 194       st_manager_validate_framebuffers(st);
 195
 196       pipeline_mask = ST_PIPELINE_RENDER_STATE_MASK;
 197       break;
 198
 199    case ST_PIPELINE_CLEAR:
 200       st_manager_validate_framebuffers(st);
 201       pipeline_mask = ST_PIPELINE_CLEAR_STATE_MASK;
 202       break;
 203
 204    case ST_PIPELINE_META:
 205       if (st->gfx_shaders_may_be_dirty) {
 206          check_program_state(st);
 207          st->gfx_shaders_may_be_dirty = false;
 208       }
 209
 210       st_manager_validate_framebuffers(st);
 211       pipeline_mask = ST_PIPELINE_META_STATE_MASK;
 212       break;
 213
 214    case ST_PIPELINE_UPDATE_FRAMEBUFFER:
 215       st_manager_validate_framebuffers(st);
 216       pipeline_mask = ST_PIPELINE_UPDATE_FB_STATE_MASK;
 217       break;
 218
 219    case ST_PIPELINE_COMPUTE: {
 220       struct st_compute_program *old_cp = st->cp;
 221       struct gl_program *new_cp = ctx->ComputeProgram._Current;
 222
 223       if (new_cp != &old_cp->Base) {
 224          if (old_cp)
 225             st->dirty |= old_cp->affected_states;
 226          assert(new_cp);
 227          st->dirty |= st_compute_program(new_cp)->affected_states;
 228       }
 229
 230       st->compute_shader_may_be_dirty = false;
 231
 232       /*
 233        * We add the ST_NEW_FB_STATE bit here as well, because glBindFramebuffer
 234        * acts as a barrier that breaks feedback loops between the framebuffer
 235        * and textures bound to the framebuffer, even when those textures are
 236        * accessed by compute shaders; so we must inform the driver of new
 237        * framebuffer state.
 238        */
 239       pipeline_mask = ST_PIPELINE_COMPUTE_STATE_MASK | ST_NEW_FB_STATE;
 240       break;
 241    }
 242
 243    default:
 244       unreachable("Invalid pipeline specified");
 245    }
 246
 247    dirty = st->dirty & pipeline_mask;
 248    if (!dirty)
 249       return;
 250
 251    dirty_lo = dirty;
 252    dirty_hi = dirty >> 32;
 253
 254    /* Update states.
 255     *
 256     * Don't use u_bit_scan64, it may be slower on 32-bit.
 257     */
 258    while (dirty_lo)
 259       update_functions[u_bit_scan(&dirty_lo)](st);
 260    while (dirty_hi)
 261       update_functions[32 + u_bit_scan(&dirty_hi)](st);
 262
 263    /* Clear the render or compute state bits. */
 264    st->dirty &= ~pipeline_mask;
 265 }