src/gallium/drivers/softpipe/sp_state_derived.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
  * 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 TUNGSTEN GRAPHICS 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 "util/u_inlines.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 #include "util/u_pstipple.h"
 #include "pipe/p_shader_tokens.h"
 #include "draw/draw_context.h"
 #include "draw/draw_vertex.h"
 #include "sp_context.h"
 #include "sp_screen.h"
 #include "sp_state.h"
 #include "sp_texture.h"
 #include "sp_tex_tile_cache.h"


 /**
  * Mark the current vertex layout as "invalid".
  * We'll validate the vertex layout later, when we start to actually
  * render a point or line or tri.
  */
 static void
 invalidate_vertex_layout(struct softpipe_context *softpipe)
 {
    softpipe->vertex_info.num_attribs =  0;
 }


 /**
  * The vertex info describes how to convert the post-transformed vertices
  * (simple float[][4]) used by the 'draw' module into vertices for
  * rasterization.
  *
  * This function validates the vertex layout and returns a pointer to a
  * vertex_info object.
  */
 struct vertex_info *
 softpipe_get_vertex_info(struct softpipe_context *softpipe)
 {
    struct vertex_info *vinfo = &softpipe->vertex_info;

    if (vinfo->num_attribs == 0) {
       /* compute vertex layout now */
       const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
       const uint num = draw_num_shader_outputs(softpipe->draw);
       uint i;

       /* Tell draw_vbuf to simply emit the whole post-xform vertex
        * as-is.  No longer any need to try and emit draw vertex_header
        * info.
        */
       vinfo_vbuf->num_attribs = 0;
       for (i = 0; i < num; i++) {
 	 draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
       }
       draw_compute_vertex_size(vinfo_vbuf);

       /*
        * Loop over fragment shader inputs, searching for the matching output
        * from the vertex shader.
        */
       vinfo->num_attribs = 0;
       for (i = 0; i < fsInfo->num_inputs; i++) {
          int src;
          enum interp_mode interp = INTERP_LINEAR;

          switch (fsInfo->input_interpolate[i]) {
          case TGSI_INTERPOLATE_CONSTANT:
             interp = INTERP_CONSTANT;
             break;
          case TGSI_INTERPOLATE_LINEAR:
             interp = INTERP_LINEAR;
             break;
          case TGSI_INTERPOLATE_PERSPECTIVE:
             interp = INTERP_PERSPECTIVE;
             break;
          case TGSI_INTERPOLATE_COLOR:
             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
             break;
          default:
             assert(0);
          }

          switch (fsInfo->input_semantic_name[i]) {
          case TGSI_SEMANTIC_POSITION:
             interp = INTERP_POS;
             break;

          case TGSI_SEMANTIC_COLOR:
             if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
                if (softpipe->rasterizer->flatshade)
                   interp = INTERP_CONSTANT;
                else
                   interp = INTERP_PERSPECTIVE;
             }
             break;
          }

          /* this includes texcoords and varying vars */
          src = draw_find_shader_output(softpipe->draw,
                                        fsInfo->input_semantic_name[i],
                                        fsInfo->input_semantic_index[i]);
 	 if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == 0)
 	   /* try and find a bcolor */
 	   src = draw_find_shader_output(softpipe->draw,
 					 TGSI_SEMANTIC_BCOLOR, fsInfo->input_semantic_index[i]);

          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
       }

       softpipe->psize_slot = draw_find_shader_output(softpipe->draw,
                                                  TGSI_SEMANTIC_PSIZE, 0);
       if (softpipe->psize_slot > 0) {
          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
                                softpipe->psize_slot);
       }

       draw_compute_vertex_size(vinfo);
    }

    return vinfo;
 }


 /**
  * Called from vbuf module.
  *
  * Note that there's actually two different vertex layouts in softpipe.
  *
  * The normal one is computed in softpipe_get_vertex_info() above and is
  * used by the point/line/tri "setup" code.
  *
  * The other one (this one) is only used by the vbuf module (which is
  * not normally used by default but used in testing).  For the vbuf module,
  * we basically want to pass-through the draw module's vertex layout as-is.
  * When the softpipe vbuf code begins drawing, the normal vertex layout
  * will come into play again.
  */
 struct vertex_info *
 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 {
    (void) softpipe_get_vertex_info(softpipe);
    return &softpipe->vertex_info_vbuf;
 }


 /**
  * Recompute cliprect from scissor bounds, scissor enable and surface size.
  */
 static void
 compute_cliprect(struct softpipe_context *sp)
 {
    /* SP_NEW_FRAMEBUFFER
     */
    uint surfWidth = sp->framebuffer.width;
    uint surfHeight = sp->framebuffer.height;

    /* SP_NEW_RASTERIZER
     */
    if (sp->rasterizer->scissor) {

       /* SP_NEW_SCISSOR
        *
        * clip to scissor rect:
        */
       sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
       sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
       sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
       sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
    }
    else {
       /* clip to surface bounds */
       sp->cliprect.minx = 0;
       sp->cliprect.miny = 0;
       sp->cliprect.maxx = surfWidth;
       sp->cliprect.maxy = surfHeight;
    }
 }


 static void
 update_tgsi_samplers( struct softpipe_context *softpipe )
 {
    unsigned i, sh;

    softpipe_reset_sampler_variants( softpipe );

    for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
       for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
          struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];
          if (tc && tc->texture) {
             struct softpipe_resource *spt = softpipe_resource(tc->texture);
             if (spt->timestamp != tc->timestamp) {
                sp_tex_tile_cache_validate_texture( tc );
                /*
                  _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
                */
                tc->timestamp = spt->timestamp;
             }
          }
       }
    }
 }


 static void
 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 {
    struct sp_fragment_shader_variant_key key;

    memset(&key, 0, sizeof(key));

    if (prim == PIPE_PRIM_TRIANGLES)
       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;

    if (softpipe->fs) {
       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
                                                       softpipe->fs, &key);

       /* prepare the TGSI interpreter for FS execution */
       softpipe->fs_variant->prepare(softpipe->fs_variant,
                                     softpipe->fs_machine,
                                     (struct tgsi_sampler **) softpipe->
                                     tgsi.samplers_list[PIPE_SHADER_FRAGMENT]);
    }
    else {
       softpipe->fs_variant = NULL;
    }

    /* This would be the logical place to pass the fragment shader
     * to the draw module.  However, doing this here, during state
     * validation, causes problems with the 'draw' module helpers for
     * wide/AA/stippled lines.
     * In principle, the draw's fragment shader should be per-variant
     * but that doesn't work.  So we use a single draw fragment shader
     * per fragment shader, not per variant.
     */
 #if 0
    if (softpipe->fs_variant) {
       draw_bind_fragment_shader(softpipe->draw,
                                 softpipe->fs_variant->draw_shader);
    }
    else {
       draw_bind_fragment_shader(softpipe->draw, NULL);
    }
 #endif
 }


 /**
  * This should be called when the polygon stipple pattern changes.
  * We create a new texture from the stipple pattern and create a new
  * sampler view.
  */
 static void
 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 {
    struct pipe_resource *tex;
    struct pipe_sampler_view *view;

    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
                                               softpipe->poly_stipple.stipple);
    pipe_resource_reference(&softpipe->pstipple.texture, tex);
    pipe_resource_reference(&tex, NULL);

    view = util_pstipple_create_sampler_view(&softpipe->pipe,
                                             softpipe->pstipple.texture);
    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
    pipe_sampler_view_reference(&view, NULL);
 }


 /**
  * Should be called when polygon stipple is enabled/disabled or when
  * the fragment shader changes.
  * We add/update the fragment sampler and sampler views to sample from
  * the polygon stipple texture.  The texture unit that we use depends on
  * the fragment shader (we need to use a unit not otherwise used by the
  * shader).
  */
 static void
 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 {
    if (prim == PIPE_PRIM_TRIANGLES &&
        softpipe->fs_variant->key.polygon_stipple) {
       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;

       /* sampler state */
       softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;

       /* sampler view */
       pipe_sampler_view_reference(&softpipe->sampler_views[PIPE_SHADER_FRAGMENT][unit],
                                   softpipe->pstipple.sampler_view);

       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[PIPE_SHADER_FRAGMENT][unit],
                                          softpipe->pstipple.sampler_view);

       softpipe->dirty |= SP_NEW_SAMPLER;
    }
 }


 /* Hopefully this will remain quite simple, otherwise need to pull in
  * something like the state tracker mechanism.
  */
 void
 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 {
    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);

    /* Check for updated textures.
     */
    if (softpipe->tex_timestamp != sp_screen->timestamp) {
       softpipe->tex_timestamp = sp_screen->timestamp;
       softpipe->dirty |= SP_NEW_TEXTURE;
    }

 #if DO_PSTIPPLE_IN_HELPER_MODULE
    if (softpipe->dirty & SP_NEW_STIPPLE)
       /* before updating samplers! */
       update_polygon_stipple_pattern(softpipe);
 #endif

    if (softpipe->dirty & (SP_NEW_RASTERIZER |
                           SP_NEW_FS))
       update_fragment_shader(softpipe, prim);

 #if DO_PSTIPPLE_IN_HELPER_MODULE
    if (softpipe->dirty & (SP_NEW_RASTERIZER |
                           SP_NEW_STIPPLE |
                           SP_NEW_FS))
       update_polygon_stipple_enable(softpipe, prim);
 #endif

    if (softpipe->dirty & (SP_NEW_SAMPLER |
                           SP_NEW_TEXTURE |
                           SP_NEW_FS |
                           SP_NEW_VS))
       update_tgsi_samplers( softpipe );

    if (softpipe->dirty & (SP_NEW_RASTERIZER |
                           SP_NEW_FS |
                           SP_NEW_VS))
       invalidate_vertex_layout( softpipe );

    if (softpipe->dirty & (SP_NEW_SCISSOR |
                           SP_NEW_RASTERIZER |
                           SP_NEW_FRAMEBUFFER))
       compute_cliprect(softpipe);

    if (softpipe->dirty & (SP_NEW_BLEND |
                           SP_NEW_DEPTH_STENCIL_ALPHA |
                           SP_NEW_FRAMEBUFFER |
                           SP_NEW_FS))
       sp_build_quad_pipeline(softpipe);

    softpipe->dirty = 0;
 }
	/**************************************************************************
	*
	* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
	* 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 TUNGSTEN GRAPHICS 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 "util/u_inlines.h"
	#include "util/u_math.h"
	#include "util/u_memory.h"
	#include "util/u_pstipple.h"
	#include "pipe/p_shader_tokens.h"
	#include "draw/draw_context.h"
	#include "draw/draw_vertex.h"
	#include "sp_context.h"
	#include "sp_screen.h"
	#include "sp_state.h"
	#include "sp_texture.h"
	#include "sp_tex_tile_cache.h"


	/**
	* Mark the current vertex layout as "invalid".
	* We'll validate the vertex layout later, when we start to actually
	* render a point or line or tri.
	*/
	static void
	invalidate_vertex_layout(struct softpipe_context *softpipe)
	{
	softpipe->vertex_info.num_attribs = 0;
	}


	/**
	* The vertex info describes how to convert the post-transformed vertices
	* (simple float[][4]) used by the 'draw' module into vertices for
	* rasterization.
	*
	* This function validates the vertex layout and returns a pointer to a
	* vertex_info object.
	*/
	struct vertex_info *
	softpipe_get_vertex_info(struct softpipe_context *softpipe)
	{
	struct vertex_info *vinfo = &softpipe->vertex_info;

	if (vinfo->num_attribs == 0) {
	/* compute vertex layout now */
	const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
	struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
	const uint num = draw_num_shader_outputs(softpipe->draw);
	uint i;

	/* Tell draw_vbuf to simply emit the whole post-xform vertex
	* as-is. No longer any need to try and emit draw vertex_header
	* info.
	*/
	vinfo_vbuf->num_attribs = 0;
	for (i = 0; i < num; i++) {
	draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
	}
	draw_compute_vertex_size(vinfo_vbuf);

	/*
	* Loop over fragment shader inputs, searching for the matching output
	* from the vertex shader.
	*/
	vinfo->num_attribs = 0;
	for (i = 0; i < fsInfo->num_inputs; i++) {
	int src;
	enum interp_mode interp = INTERP_LINEAR;

	switch (fsInfo->input_interpolate[i]) {
	case TGSI_INTERPOLATE_CONSTANT:
	interp = INTERP_CONSTANT;
	break;
	case TGSI_INTERPOLATE_LINEAR:
	interp = INTERP_LINEAR;
	break;
	case TGSI_INTERPOLATE_PERSPECTIVE:
	interp = INTERP_PERSPECTIVE;
	break;
	case TGSI_INTERPOLATE_COLOR:
	assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
	break;
	default:
	assert(0);
	}

	switch (fsInfo->input_semantic_name[i]) {
	case TGSI_SEMANTIC_POSITION:
	interp = INTERP_POS;
	break;

	case TGSI_SEMANTIC_COLOR:
	if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
	if (softpipe->rasterizer->flatshade)
	interp = INTERP_CONSTANT;
	else
	interp = INTERP_PERSPECTIVE;
	}
	break;
	}

	/* this includes texcoords and varying vars */
	src = draw_find_shader_output(softpipe->draw,
	fsInfo->input_semantic_name[i],
	fsInfo->input_semantic_index[i]);
	if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == 0)
	/* try and find a bcolor */
	src = draw_find_shader_output(softpipe->draw,
	TGSI_SEMANTIC_BCOLOR, fsInfo->input_semantic_index[i]);

	draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
	}

	softpipe->psize_slot = draw_find_shader_output(softpipe->draw,
	TGSI_SEMANTIC_PSIZE, 0);
	if (softpipe->psize_slot > 0) {
	draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
	softpipe->psize_slot);
	}

	draw_compute_vertex_size(vinfo);
	}

	return vinfo;
	}


	/**
	* Called from vbuf module.
	*
	* Note that there's actually two different vertex layouts in softpipe.
	*
	* The normal one is computed in softpipe_get_vertex_info() above and is
	* used by the point/line/tri "setup" code.
	*
	* The other one (this one) is only used by the vbuf module (which is
	* not normally used by default but used in testing). For the vbuf module,
	* we basically want to pass-through the draw module's vertex layout as-is.
	* When the softpipe vbuf code begins drawing, the normal vertex layout
	* will come into play again.
	*/
	struct vertex_info *
	softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
	{
	(void) softpipe_get_vertex_info(softpipe);
	return &softpipe->vertex_info_vbuf;
	}


	/**
	* Recompute cliprect from scissor bounds, scissor enable and surface size.
	*/
	static void
	compute_cliprect(struct softpipe_context *sp)
	{
	/* SP_NEW_FRAMEBUFFER
	*/
	uint surfWidth = sp->framebuffer.width;
	uint surfHeight = sp->framebuffer.height;

	/* SP_NEW_RASTERIZER
	*/
	if (sp->rasterizer->scissor) {

	/* SP_NEW_SCISSOR
	*
	* clip to scissor rect:
	*/
	sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
	sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
	sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
	sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
	}
	else {
	/* clip to surface bounds */
	sp->cliprect.minx = 0;
	sp->cliprect.miny = 0;
	sp->cliprect.maxx = surfWidth;
	sp->cliprect.maxy = surfHeight;
	}
	}


	static void
	update_tgsi_samplers( struct softpipe_context *softpipe )
	{
	unsigned i, sh;

	softpipe_reset_sampler_variants( softpipe );

	for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
	for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
	struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];
	if (tc && tc->texture) {
	struct softpipe_resource *spt = softpipe_resource(tc->texture);
	if (spt->timestamp != tc->timestamp) {
	sp_tex_tile_cache_validate_texture( tc );
	/*
	_debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
	*/
	tc->timestamp = spt->timestamp;
	}
	}
	}
	}
	}


	static void
	update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
	{
	struct sp_fragment_shader_variant_key key;

	memset(&key, 0, sizeof(key));

	if (prim == PIPE_PRIM_TRIANGLES)
	key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;

	if (softpipe->fs) {
	softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
	softpipe->fs, &key);

	/* prepare the TGSI interpreter for FS execution */
	softpipe->fs_variant->prepare(softpipe->fs_variant,
	softpipe->fs_machine,
	(struct tgsi_sampler **) softpipe->
	tgsi.samplers_list[PIPE_SHADER_FRAGMENT]);
	}
	else {
	softpipe->fs_variant = NULL;
	}

	/* This would be the logical place to pass the fragment shader
	* to the draw module. However, doing this here, during state
	* validation, causes problems with the 'draw' module helpers for
	* wide/AA/stippled lines.
	* In principle, the draw's fragment shader should be per-variant
	* but that doesn't work. So we use a single draw fragment shader
	* per fragment shader, not per variant.
	*/
	#if 0
	if (softpipe->fs_variant) {
	draw_bind_fragment_shader(softpipe->draw,
	softpipe->fs_variant->draw_shader);
	}
	else {
	draw_bind_fragment_shader(softpipe->draw, NULL);
	}
	#endif
	}


	/**
	* This should be called when the polygon stipple pattern changes.
	* We create a new texture from the stipple pattern and create a new
	* sampler view.
	*/
	static void
	update_polygon_stipple_pattern(struct softpipe_context *softpipe)
	{
	struct pipe_resource *tex;
	struct pipe_sampler_view *view;

	tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
	softpipe->poly_stipple.stipple);
	pipe_resource_reference(&softpipe->pstipple.texture, tex);
	pipe_resource_reference(&tex, NULL);

	view = util_pstipple_create_sampler_view(&softpipe->pipe,
	softpipe->pstipple.texture);
	pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
	pipe_sampler_view_reference(&view, NULL);
	}


	/**
	* Should be called when polygon stipple is enabled/disabled or when
	* the fragment shader changes.
	* We add/update the fragment sampler and sampler views to sample from
	* the polygon stipple texture. The texture unit that we use depends on
	* the fragment shader (we need to use a unit not otherwise used by the
	* shader).
	*/
	static void
	update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
	{
	if (prim == PIPE_PRIM_TRIANGLES &&
	softpipe->fs_variant->key.polygon_stipple) {
	const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;

	/* sampler state */
	softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;

	/* sampler view */
	pipe_sampler_view_reference(&softpipe->sampler_views[PIPE_SHADER_FRAGMENT][unit],
	softpipe->pstipple.sampler_view);

	sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[PIPE_SHADER_FRAGMENT][unit],
	softpipe->pstipple.sampler_view);

	softpipe->dirty \|= SP_NEW_SAMPLER;
	}
	}


	/* Hopefully this will remain quite simple, otherwise need to pull in
	* something like the state tracker mechanism.
	*/
	void
	softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
	{
	struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);

	/* Check for updated textures.
	*/
	if (softpipe->tex_timestamp != sp_screen->timestamp) {
	softpipe->tex_timestamp = sp_screen->timestamp;
	softpipe->dirty \|= SP_NEW_TEXTURE;
	}

	#if DO_PSTIPPLE_IN_HELPER_MODULE
	if (softpipe->dirty & SP_NEW_STIPPLE)
	/* before updating samplers! */
	update_polygon_stipple_pattern(softpipe);
	#endif

	if (softpipe->dirty & (SP_NEW_RASTERIZER \|
	SP_NEW_FS))
	update_fragment_shader(softpipe, prim);

	#if DO_PSTIPPLE_IN_HELPER_MODULE
	if (softpipe->dirty & (SP_NEW_RASTERIZER \|
	SP_NEW_STIPPLE \|
	SP_NEW_FS))
	update_polygon_stipple_enable(softpipe, prim);
	#endif

	if (softpipe->dirty & (SP_NEW_SAMPLER \|
	SP_NEW_TEXTURE \|
	SP_NEW_FS \|
	SP_NEW_VS))
	update_tgsi_samplers( softpipe );

	if (softpipe->dirty & (SP_NEW_RASTERIZER \|
	SP_NEW_FS \|
	SP_NEW_VS))
	invalidate_vertex_layout( softpipe );

	if (softpipe->dirty & (SP_NEW_SCISSOR \|
	SP_NEW_RASTERIZER \|
	SP_NEW_FRAMEBUFFER))
	compute_cliprect(softpipe);

	if (softpipe->dirty & (SP_NEW_BLEND \|
	SP_NEW_DEPTH_STENCIL_ALPHA \|
	SP_NEW_FRAMEBUFFER \|
	SP_NEW_FS))
	sp_build_quad_pipeline(softpipe);

	softpipe->dirty = 0;
	}