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
  80    /* Flag states used by both new and old shaders to unbind shader resources
  81     * properly when transitioning to shaders that don't use them.
  82     */
  83    if (unlikely(new_vp != &old_vp->Base)) {
  84       if (old_vp)
  85          dirty |= old_vp->affected_states;
  86       if (new_vp)
  87          dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(new_vp));
  88    }
  89
  90    if (unlikely(new_tcp != &old_tcp->Base)) {
  91       if (old_tcp)
  92          dirty |= old_tcp->affected_states;
  93       if (new_tcp)
  94          dirty |= st_common_program(new_tcp)->affected_states;
  95    }
  96
  97    if (unlikely(new_tep != &old_tep->Base)) {
  98       if (old_tep)
  99          dirty |= old_tep->affected_states;
 100       if (new_tep)
 101          dirty |= st_common_program(new_tep)->affected_states;
 102    }
 103
 104    if (unlikely(new_gp != &old_gp->Base)) {
 105       if (old_gp)
 106          dirty |= old_gp->affected_states;
 107       if (new_gp)
 108          dirty |= st_common_program(new_gp)->affected_states;
 109    }
 110
 111    if (unlikely(new_fp != &old_fp->Base)) {
 112       if (old_fp)
 113          dirty |= old_fp->affected_states;
 114       if (new_fp)
 115          dirty |= st_fragment_program(new_fp)->affected_states;
 116    }
 117
 118    st->dirty |= dirty;
 119    st->gfx_shaders_may_be_dirty = false;
 120 }
 121
 122 static void check_attrib_edgeflag(struct st_context *st)
 123 {
 124    const struct gl_vertex_array **arrays = st->ctx->Array._DrawArrays;
 125    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 126    struct gl_program *vp = st->ctx->VertexProgram._Current;
 127
 128    if (!arrays)
 129       return;
 130
 131    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 132                        st->ctx->Polygon.BackMode != GL_FILL;
 133
 134    vertdata_edgeflags = edgeflags_enabled &&
 135                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
 136    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 137       st->vertdata_edgeflags = vertdata_edgeflags;
 138       if (vp)
 139          st->dirty |= ST_NEW_VERTEX_PROGRAM(st, st_vertex_program(vp));
 140    }
 141
 142    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 143                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 144    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 145       st->edgeflag_culls_prims = edgeflag_culls_prims;
 146       st->dirty |= ST_NEW_RASTERIZER;
 147    }
 148 }
 149
 150
 151 /***********************************************************************
 152  * Update all derived state:
 153  */
 154
 155 void st_validate_state( struct st_context *st, enum st_pipeline pipeline )
 156 {
 157    struct gl_context *ctx = st->ctx;
 158    uint64_t dirty, pipeline_mask;
 159    uint32_t dirty_lo, dirty_hi;
 160
 161    /* Get Mesa driver state.
 162     *
 163     * Inactive states are shader states not used by shaders at the moment.
 164     */
 165    st->dirty |= ctx->NewDriverState & st->active_states & ST_ALL_STATES_MASK;
 166    ctx->NewDriverState = 0;
 167
 168    /* Get pipeline state. */
 169    switch (pipeline) {
 170    case ST_PIPELINE_RENDER:
 171       if (st->ctx->API == API_OPENGL_COMPAT)
 172          check_attrib_edgeflag(st);
 173
 174       check_program_state(st);
 175       st_manager_validate_framebuffers(st);
 176
 177       pipeline_mask = ST_PIPELINE_RENDER_STATE_MASK;
 178       break;
 179
 180    case ST_PIPELINE_CLEAR:
 181       st_manager_validate_framebuffers(st);
 182       pipeline_mask = ST_PIPELINE_CLEAR_STATE_MASK;
 183       break;
 184
 185    case ST_PIPELINE_UPDATE_FRAMEBUFFER:
 186       st_manager_validate_framebuffers(st);
 187       pipeline_mask = ST_PIPELINE_UPDATE_FB_STATE_MASK;
 188       break;
 189
 190    case ST_PIPELINE_COMPUTE: {
 191       struct st_compute_program *old_cp = st->cp;
 192       struct gl_program *new_cp = ctx->ComputeProgram._Current;
 193
 194       if (new_cp != &old_cp->Base) {
 195          if (old_cp)
 196             st->dirty |= old_cp->affected_states;
 197          assert(new_cp);
 198          st->dirty |= st_compute_program(new_cp)->affected_states;
 199       }
 200
 201       st->compute_shader_may_be_dirty = false;
 202
 203       /*
 204        * We add the ST_NEW_FB_STATE bit here as well, because glBindFramebuffer
 205        * acts as a barrier that breaks feedback loops between the framebuffer
 206        * and textures bound to the framebuffer, even when those textures are
 207        * accessed by compute shaders; so we must inform the driver of new
 208        * framebuffer state.
 209        */
 210       pipeline_mask = ST_PIPELINE_COMPUTE_STATE_MASK | ST_NEW_FB_STATE;
 211       break;
 212    }
 213
 214    default:
 215       unreachable("Invalid pipeline specified");
 216    }
 217
 218    dirty = st->dirty & pipeline_mask;
 219    if (!dirty)
 220       return;
 221
 222    dirty_lo = dirty;
 223    dirty_hi = dirty >> 32;
 224
 225    /* Update states.
 226     *
 227     * Don't use u_bit_scan64, it may be slower on 32-bit.
 228     */
 229    while (dirty_lo)
 230       update_functions[u_bit_scan(&dirty_lo)](st);
 231    while (dirty_hi)
 232       update_functions[32 + u_bit_scan(&dirty_hi)](st);
 233
 234    /* Clear the render or compute state bits. */
 235    st->dirty &= ~pipeline_mask;
 236 }