src/mesa/state_tracker/st_atom.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * Copyright 2003 VMware, Inc.
  * All Rights Reserved.
  *
  * 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, sub license, 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 (including the
  * next paragraph) 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 NON-INFRINGEMENT.
  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 <stdio.h>
 #include "main/arrayobj.h"
 #include "main/glheader.h"
 #include "main/context.h"

 #include "pipe/p_defines.h"
 #include "st_context.h"
 #include "st_atom.h"
 #include "st_program.h"
 #include "st_manager.h"
 #include "st_util.h"


 typedef void (*update_func_t)(struct st_context *st);

 /* The list state update functions. */
 static const update_func_t update_functions[] =
 {
 #define ST_STATE(FLAG, st_update) st_update,
 #include "st_atom_list.h"
 #undef ST_STATE
 };


 void st_init_atoms( struct st_context *st )
 {
    STATIC_ASSERT(ARRAY_SIZE(update_functions) <= 64);
 }


 void st_destroy_atoms( struct st_context *st )
 {
    /* no-op */
 }


 /* Too complex to figure out, just check every time:
  */
 static void check_program_state( struct st_context *st )
 {
    struct gl_context *ctx = st->ctx;
    struct st_program *old_vp = st->vp;
    struct st_program *old_tcp = st->tcp;
    struct st_program *old_tep = st->tep;
    struct st_program *old_gp = st->gp;
    struct st_program *old_fp = st->fp;

    struct gl_program *new_vp = ctx->VertexProgram._Current;
    struct gl_program *new_tcp = ctx->TessCtrlProgram._Current;
    struct gl_program *new_tep = ctx->TessEvalProgram._Current;
    struct gl_program *new_gp = ctx->GeometryProgram._Current;
    struct gl_program *new_fp = ctx->FragmentProgram._Current;
    uint64_t dirty = 0;
    unsigned num_viewports = 1;

    /* Flag states used by both new and old shaders to unbind shader resources
     * properly when transitioning to shaders that don't use them.
     */
    if (unlikely(new_vp != (old_vp ? &old_vp->Base : NULL))) {
       if (old_vp)
          dirty |= old_vp->affected_states;
       if (new_vp)
          dirty |= ST_NEW_VERTEX_PROGRAM(st, st_program(new_vp));
    }

    if (unlikely(new_tcp != &old_tcp->Base)) {
       if (old_tcp)
          dirty |= old_tcp->affected_states;
       if (new_tcp)
          dirty |= st_program(new_tcp)->affected_states;
    }

    if (unlikely(new_tep != &old_tep->Base)) {
       if (old_tep)
          dirty |= old_tep->affected_states;
       if (new_tep)
          dirty |= st_program(new_tep)->affected_states;
    }

    if (unlikely(new_gp != &old_gp->Base)) {
       if (old_gp)
          dirty |= old_gp->affected_states;
       if (new_gp)
          dirty |= st_program(new_gp)->affected_states;
    }

    if (unlikely(new_fp != &old_fp->Base)) {
       if (old_fp)
          dirty |= old_fp->affected_states;
       if (new_fp)
          dirty |= st_program(new_fp)->affected_states;
    }

    /* Find out the number of viewports. This determines how many scissors
     * and viewport states we need to update.
     */
    struct gl_program *last_prim_shader = new_gp ? new_gp :
                                          new_tep ? new_tep : new_vp;
    if (last_prim_shader &&
        last_prim_shader->info.outputs_written & (
              VARYING_BIT_VIEWPORT | VARYING_BIT_VIEWPORT_MASK))
       num_viewports = ctx->Const.MaxViewports;

    if (st->state.num_viewports != num_viewports) {
       st->state.num_viewports = num_viewports;
       dirty |= ST_NEW_VIEWPORT;

       if (ctx->Scissor.EnableFlags & u_bit_consecutive(0, num_viewports))
          dirty |= ST_NEW_SCISSOR;
    }

    st->dirty |= dirty;
 }

 static void check_attrib_edgeflag(struct st_context *st)
 {
    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
    struct gl_program *vp = st->ctx->VertexProgram._Current;

    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
                        st->ctx->Polygon.BackMode != GL_FILL;

    vertdata_edgeflags = edgeflags_enabled &&
       _mesa_draw_edge_flag_array_enabled(st->ctx);

    if (vertdata_edgeflags != st->vertdata_edgeflags) {
       st->vertdata_edgeflags = vertdata_edgeflags;
       if (vp)
          st->dirty |= ST_NEW_VERTEX_PROGRAM(st, st_program(vp));
    }

    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
       st->edgeflag_culls_prims = edgeflag_culls_prims;
       st->dirty |= ST_NEW_RASTERIZER;
    }
 }


 /***********************************************************************
  * Update all derived state:
  */

 void st_validate_state( struct st_context *st, enum st_pipeline pipeline )
 {
    struct gl_context *ctx = st->ctx;
    uint64_t dirty, pipeline_mask;
    uint32_t dirty_lo, dirty_hi;

    /* Get Mesa driver state.
     *
     * Inactive states are shader states not used by shaders at the moment.
     */
    st->dirty |= ctx->NewDriverState & st->active_states & ST_ALL_STATES_MASK;
    ctx->NewDriverState &= ~st->dirty;

    /* Get pipeline state. */
    switch (pipeline) {
    case ST_PIPELINE_RENDER:
       if (st->ctx->API == API_OPENGL_COMPAT)
          check_attrib_edgeflag(st);

       if (st->gfx_shaders_may_be_dirty) {
          check_program_state(st);
          st->gfx_shaders_may_be_dirty = false;
       }

       st_manager_validate_framebuffers(st);

       pipeline_mask = ST_PIPELINE_RENDER_STATE_MASK;
       break;

    case ST_PIPELINE_CLEAR:
       st_manager_validate_framebuffers(st);
       pipeline_mask = ST_PIPELINE_CLEAR_STATE_MASK;
       break;

    case ST_PIPELINE_META:
       if (st->gfx_shaders_may_be_dirty) {
          check_program_state(st);
          st->gfx_shaders_may_be_dirty = false;
       }

       st_manager_validate_framebuffers(st);
       pipeline_mask = ST_PIPELINE_META_STATE_MASK;
       break;

    case ST_PIPELINE_UPDATE_FRAMEBUFFER:
       st_manager_validate_framebuffers(st);
       pipeline_mask = ST_PIPELINE_UPDATE_FB_STATE_MASK;
       break;

    case ST_PIPELINE_COMPUTE: {
       struct st_program *old_cp = st->cp;
       struct gl_program *new_cp = ctx->ComputeProgram._Current;

       if (new_cp != &old_cp->Base) {
          if (old_cp)
             st->dirty |= old_cp->affected_states;
          assert(new_cp);
          st->dirty |= st_program(new_cp)->affected_states;
       }

       st->compute_shader_may_be_dirty = false;

       /*
        * We add the ST_NEW_FB_STATE bit here as well, because glBindFramebuffer
        * acts as a barrier that breaks feedback loops between the framebuffer
        * and textures bound to the framebuffer, even when those textures are
        * accessed by compute shaders; so we must inform the driver of new
        * framebuffer state.
        */
       pipeline_mask = ST_PIPELINE_COMPUTE_STATE_MASK | ST_NEW_FB_STATE;
       break;
    }

    default:
       unreachable("Invalid pipeline specified");
    }

    dirty = st->dirty & pipeline_mask;
    if (!dirty)
       return;

    dirty_lo = dirty;
    dirty_hi = dirty >> 32;

    /* Update states.
     *
     * Don't use u_bit_scan64, it may be slower on 32-bit.
     */
    while (dirty_lo)
       update_functions[u_bit_scan(&dirty_lo)](st);
    while (dirty_hi)
       update_functions[32 + u_bit_scan(&dirty_hi)](st);

    /* Clear the render or compute state bits. */
    st->dirty &= ~pipeline_mask;
 }
	/**************************************************************************
	*
	* Copyright 2003 VMware, Inc.
	* All Rights Reserved.
	*
	* 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, sub license, 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 (including the
	* next paragraph) 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 NON-INFRINGEMENT.
	* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 <stdio.h>
	#include "main/arrayobj.h"
	#include "main/glheader.h"
	#include "main/context.h"

	#include "pipe/p_defines.h"
	#include "st_context.h"
	#include "st_atom.h"
	#include "st_program.h"
	#include "st_manager.h"
	#include "st_util.h"


	typedef void (update_func_t)(struct st_context st);

	/* The list state update functions. */
	static const update_func_t update_functions[] =
	{
	#define ST_STATE(FLAG, st_update) st_update,
	#include "st_atom_list.h"
	#undef ST_STATE
	};


	void st_init_atoms( struct st_context *st )
	{
	STATIC_ASSERT(ARRAY_SIZE(update_functions) <= 64);
	}


	void st_destroy_atoms( struct st_context *st )
	{
	/* no-op */
	}


	/* Too complex to figure out, just check every time:
	*/
	static void check_program_state( struct st_context *st )
	{
	struct gl_context *ctx = st->ctx;
	struct st_program *old_vp = st->vp;
	struct st_program *old_tcp = st->tcp;
	struct st_program *old_tep = st->tep;
	struct st_program *old_gp = st->gp;
	struct st_program *old_fp = st->fp;

	struct gl_program *new_vp = ctx->VertexProgram._Current;
	struct gl_program *new_tcp = ctx->TessCtrlProgram._Current;
	struct gl_program *new_tep = ctx->TessEvalProgram._Current;
	struct gl_program *new_gp = ctx->GeometryProgram._Current;
	struct gl_program *new_fp = ctx->FragmentProgram._Current;
	uint64_t dirty = 0;
	unsigned num_viewports = 1;

	/* Flag states used by both new and old shaders to unbind shader resources
	* properly when transitioning to shaders that don't use them.
	*/
	if (unlikely(new_vp != (old_vp ? &old_vp->Base : NULL))) {
	if (old_vp)
	dirty \|= old_vp->affected_states;
	if (new_vp)
	dirty \|= ST_NEW_VERTEX_PROGRAM(st, st_program(new_vp));
	}

	if (unlikely(new_tcp != &old_tcp->Base)) {
	if (old_tcp)
	dirty \|= old_tcp->affected_states;
	if (new_tcp)
	dirty \|= st_program(new_tcp)->affected_states;
	}

	if (unlikely(new_tep != &old_tep->Base)) {
	if (old_tep)
	dirty \|= old_tep->affected_states;
	if (new_tep)
	dirty \|= st_program(new_tep)->affected_states;
	}

	if (unlikely(new_gp != &old_gp->Base)) {
	if (old_gp)
	dirty \|= old_gp->affected_states;
	if (new_gp)
	dirty \|= st_program(new_gp)->affected_states;
	}

	if (unlikely(new_fp != &old_fp->Base)) {
	if (old_fp)
	dirty \|= old_fp->affected_states;
	if (new_fp)
	dirty \|= st_program(new_fp)->affected_states;
	}

	/* Find out the number of viewports. This determines how many scissors
	* and viewport states we need to update.
	*/
	struct gl_program *last_prim_shader = new_gp ? new_gp :
	new_tep ? new_tep : new_vp;
	if (last_prim_shader &&
	last_prim_shader->info.outputs_written & (
	VARYING_BIT_VIEWPORT \| VARYING_BIT_VIEWPORT_MASK))
	num_viewports = ctx->Const.MaxViewports;

	if (st->state.num_viewports != num_viewports) {
	st->state.num_viewports = num_viewports;
	dirty \|= ST_NEW_VIEWPORT;

	if (ctx->Scissor.EnableFlags & u_bit_consecutive(0, num_viewports))
	dirty \|= ST_NEW_SCISSOR;
	}

	st->dirty \|= dirty;
	}

	static void check_attrib_edgeflag(struct st_context *st)
	{
	GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
	struct gl_program *vp = st->ctx->VertexProgram._Current;

	edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL \|\|
	st->ctx->Polygon.BackMode != GL_FILL;

	vertdata_edgeflags = edgeflags_enabled &&
	_mesa_draw_edge_flag_array_enabled(st->ctx);

	if (vertdata_edgeflags != st->vertdata_edgeflags) {
	st->vertdata_edgeflags = vertdata_edgeflags;
	if (vp)
	st->dirty \|= ST_NEW_VERTEX_PROGRAM(st, st_program(vp));
	}

	edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
	!st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
	if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
	st->edgeflag_culls_prims = edgeflag_culls_prims;
	st->dirty \|= ST_NEW_RASTERIZER;
	}
	}


	/***********************************************************************
	* Update all derived state:
	*/

	void st_validate_state( struct st_context *st, enum st_pipeline pipeline )
	{
	struct gl_context *ctx = st->ctx;
	uint64_t dirty, pipeline_mask;
	uint32_t dirty_lo, dirty_hi;

	/* Get Mesa driver state.
	*
	* Inactive states are shader states not used by shaders at the moment.
	*/
	st->dirty \|= ctx->NewDriverState & st->active_states & ST_ALL_STATES_MASK;
	ctx->NewDriverState &= ~st->dirty;

	/* Get pipeline state. */
	switch (pipeline) {
	case ST_PIPELINE_RENDER:
	if (st->ctx->API == API_OPENGL_COMPAT)
	check_attrib_edgeflag(st);

	if (st->gfx_shaders_may_be_dirty) {
	check_program_state(st);
	st->gfx_shaders_may_be_dirty = false;
	}

	st_manager_validate_framebuffers(st);

	pipeline_mask = ST_PIPELINE_RENDER_STATE_MASK;
	break;

	case ST_PIPELINE_CLEAR:
	st_manager_validate_framebuffers(st);
	pipeline_mask = ST_PIPELINE_CLEAR_STATE_MASK;
	break;

	case ST_PIPELINE_META:
	if (st->gfx_shaders_may_be_dirty) {
	check_program_state(st);
	st->gfx_shaders_may_be_dirty = false;
	}

	st_manager_validate_framebuffers(st);
	pipeline_mask = ST_PIPELINE_META_STATE_MASK;
	break;

	case ST_PIPELINE_UPDATE_FRAMEBUFFER:
	st_manager_validate_framebuffers(st);
	pipeline_mask = ST_PIPELINE_UPDATE_FB_STATE_MASK;
	break;

	case ST_PIPELINE_COMPUTE: {
	struct st_program *old_cp = st->cp;
	struct gl_program *new_cp = ctx->ComputeProgram._Current;

	if (new_cp != &old_cp->Base) {
	if (old_cp)
	st->dirty \|= old_cp->affected_states;
	assert(new_cp);
	st->dirty \|= st_program(new_cp)->affected_states;
	}

	st->compute_shader_may_be_dirty = false;

	/*
	* We add the ST_NEW_FB_STATE bit here as well, because glBindFramebuffer
	* acts as a barrier that breaks feedback loops between the framebuffer
	* and textures bound to the framebuffer, even when those textures are
	* accessed by compute shaders; so we must inform the driver of new
	* framebuffer state.
	*/
	pipeline_mask = ST_PIPELINE_COMPUTE_STATE_MASK \| ST_NEW_FB_STATE;
	break;
	}

	default:
	unreachable("Invalid pipeline specified");
	}

	dirty = st->dirty & pipeline_mask;
	if (!dirty)
	return;

	dirty_lo = dirty;
	dirty_hi = dirty >> 32;

	/* Update states.
	*
	* Don't use u_bit_scan64, it may be slower on 32-bit.
	*/
	while (dirty_lo)
	update_functions[u_bit_scan(&dirty_lo)](st);
	while (dirty_hi)
	update_functions[32 + u_bit_scan(&dirty_hi)](st);

	/* Clear the render or compute state bits. */
	st->dirty &= ~pipeline_mask;
	}