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/glheader.h"
  31 #include "main/context.h"
  32
  33 #include "pipe/p_defines.h"
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "st_program.h"
  37 #include "st_manager.h"
  38
  39 typedef void (*update_func_t)(struct st_context *st);
  40
  41 /* The list state update functions. */
  42 static const update_func_t update_functions[] =
  43 {
  44 #define ST_STATE(FLAG, st_update) st_update,
  45 #include "st_atom_list.h"
  46 #undef ST_STATE
  47 };
  48
  49
  50 void st_init_atoms( struct st_context *st )
  51 {
  52    STATIC_ASSERT(ARRAY_SIZE(update_functions) <= 64);
  53 }
  54
  55
  56 void st_destroy_atoms( struct st_context *st )
  57 {
  58    /* no-op */
  59 }
  60
  61
  62 /* Too complex to figure out, just check every time:
  63  */
  64 static void check_program_state( struct st_context *st )
  65 {
  66    struct gl_context *ctx = st->ctx;
  67    struct st_vertex_program *old_vp = st->vp;
  68    struct st_common_program *old_tcp = st->tcp;
  69    struct st_common_program *old_tep = st->tep;
  70    struct st_common_program *old_gp = st->gp;
  71    struct st_fragment_program *old_fp = st->fp;
  72
  73    struct gl_program *new_vp = ctx->VertexProgram._Current;
  74    struct gl_program *new_tcp = ctx->TessCtrlProgram._Current;
  75    struct gl_program *new_tep = ctx->TessEvalProgram._Current;
  76    struct gl_program *new_gp = ctx->GeometryProgram._Current;
  77    struct gl_program *new_fp = ctx->FragmentProgram._Current;
  78    uint64_t dirty = 0;
  79    unsigned num_viewports = 1;
  80
  81    /* Flag states used by both new and old shaders to unbind shader resources
  82     * properly when transitioning to shaders that don't use them.
  83     */
  84    if (unlikely(new_vp != &old_vp->Base)) {
  85       if (old_vp)
  86          dirty |= old_vp->affected_states;
  87       if (new_vp)
  88          dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(new_vp));
  89    }
  90
  91    if (unlikely(new_tcp != &old_tcp->Base)) {
  92       if (old_tcp)
  93          dirty |= old_tcp->affected_states;
  94       if (new_tcp)
  95          dirty |= st_common_program(new_tcp)->affected_states;
  96    }
  97
  98    if (unlikely(new_tep != &old_tep->Base)) {
  99       if (old_tep)
 100          dirty |= old_tep->affected_states;
 101       if (new_tep)
 102          dirty |= st_common_program(new_tep)->affected_states;
 103    }
 104
 105    if (unlikely(new_gp != &old_gp->Base)) {
 106       if (old_gp)
 107          dirty |= old_gp->affected_states;
 108       if (new_gp)
 109          dirty |= st_common_program(new_gp)->affected_states;
 110    }
 111
 112    if (unlikely(new_fp != &old_fp->Base)) {
 113       if (old_fp)
 114          dirty |= old_fp->affected_states;
 115       if (new_fp)
 116          dirty |= st_fragment_program(new_fp)->affected_states;
 117    }
 118
 119    /* Find out the number of viewports. This determines how many scissors
 120     * and viewport states we need to update.
 121     */
 122    struct gl_program *last_prim_shader = new_gp ? new_gp :
 123                                          new_tep ? new_tep : new_vp;
 124    if (last_prim_shader &&
 125        last_prim_shader->info.outputs_written & VARYING_BIT_VIEWPORT)
 126       num_viewports = ctx->Const.MaxViewports;
 127
 128    if (st->state.num_viewports != num_viewports) {
 129       st->state.num_viewports = num_viewports;
 130       dirty |= ST_NEW_VIEWPORT;
 131
 132       if (ctx->Scissor.EnableFlags & u_bit_consecutive(0, num_viewports))
 133          dirty |= ST_NEW_SCISSOR;
 134    }
 135
 136    st->dirty |= dirty;
 137 }
 138
 139 static void check_attrib_edgeflag(struct st_context *st)
 140 {
 141    const struct gl_vertex_array *arrays = st->ctx->Array._DrawArrays;
 142    const struct gl_vertex_buffer_binding *binding;
 143    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 144    struct gl_program *vp = st->ctx->VertexProgram._Current;
 145
 146    if (!arrays)
 147       return;
 148
 149    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 150                        st->ctx->Polygon.BackMode != GL_FILL;
 151
 152    binding = arrays[VERT_ATTRIB_EDGEFLAG].BufferBinding;
 153    vertdata_edgeflags = edgeflags_enabled && binding->Stride != 0;
 154    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 155       st->vertdata_edgeflags = vertdata_edgeflags;
 156       if (vp)
 157          st->dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(vp));
 158    }
 159
 160    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 161                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 162    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 163       st->edgeflag_culls_prims = edgeflag_culls_prims;
 164       st->dirty |= ST_NEW_RASTERIZER;
 165    }
 166 }
 167
 168
 169 /***********************************************************************
 170  * Update all derived state:
 171  */
 172
 173 void st_validate_state( struct st_context *st, enum st_pipeline pipeline )
 174 {
 175    struct gl_context *ctx = st->ctx;
 176    uint64_t dirty, pipeline_mask;
 177    uint32_t dirty_lo, dirty_hi;
 178
 179    /* Get Mesa driver state.
 180     *
 181     * Inactive states are shader states not used by shaders at the moment.
 182     */
 183    st->dirty |= ctx->NewDriverState & st->active_states & ST_ALL_STATES_MASK;
 184    ctx->NewDriverState = 0;
 185
 186    /* Get pipeline state. */
 187    switch (pipeline) {
 188    case ST_PIPELINE_RENDER:
 189       if (st->ctx->API == API_OPENGL_COMPAT)
 190          check_attrib_edgeflag(st);
 191
 192       if (st->gfx_shaders_may_be_dirty) {
 193          check_program_state(st);
 194          st->gfx_shaders_may_be_dirty = false;
 195       }
 196
 197       st_manager_validate_framebuffers(st);
 198
 199       pipeline_mask = ST_PIPELINE_RENDER_STATE_MASK;
 200       break;
 201
 202    case ST_PIPELINE_CLEAR:
 203       st_manager_validate_framebuffers(st);
 204       pipeline_mask = ST_PIPELINE_CLEAR_STATE_MASK;
 205       break;
 206
 207    case ST_PIPELINE_META:
 208       if (st->gfx_shaders_may_be_dirty) {
 209          check_program_state(st);
 210          st->gfx_shaders_may_be_dirty = false;
 211       }
 212
 213       st_manager_validate_framebuffers(st);
 214       pipeline_mask = ST_PIPELINE_META_STATE_MASK;
 215       break;
 216
 217    case ST_PIPELINE_UPDATE_FRAMEBUFFER:
 218       st_manager_validate_framebuffers(st);
 219       pipeline_mask = ST_PIPELINE_UPDATE_FB_STATE_MASK;
 220       break;
 221
 222    case ST_PIPELINE_COMPUTE: {
 223       struct st_compute_program *old_cp = st->cp;
 224       struct gl_program *new_cp = ctx->ComputeProgram._Current;
 225
 226       if (new_cp != &old_cp->Base) {
 227          if (old_cp)
 228             st->dirty |= old_cp->affected_states;
 229          assert(new_cp);
 230          st->dirty |= st_compute_program(new_cp)->affected_states;
 231       }
 232
 233       st->compute_shader_may_be_dirty = false;
 234
 235       /*
 236        * We add the ST_NEW_FB_STATE bit here as well, because glBindFramebuffer
 237        * acts as a barrier that breaks feedback loops between the framebuffer
 238        * and textures bound to the framebuffer, even when those textures are
 239        * accessed by compute shaders; so we must inform the driver of new
 240        * framebuffer state.
 241        */
 242       pipeline_mask = ST_PIPELINE_COMPUTE_STATE_MASK | ST_NEW_FB_STATE;
 243       break;
 244    }
 245
 246    default:
 247       unreachable("Invalid pipeline specified");
 248    }
 249
 250    dirty = st->dirty & pipeline_mask;
 251    if (!dirty)
 252       return;
 253
 254    dirty_lo = dirty;
 255    dirty_hi = dirty >> 32;
 256
 257    /* Update states.
 258     *
 259     * Don't use u_bit_scan64, it may be slower on 32-bit.
 260     */
 261    while (dirty_lo)
 262       update_functions[u_bit_scan(&dirty_lo)](st);
 263    while (dirty_hi)
 264       update_functions[32 + u_bit_scan(&dirty_hi)](st);
 265
 266    /* Clear the render or compute state bits. */
 267    st->dirty &= ~pipeline_mask;
 268 }