src/gallium/drivers/llvmpipe/lp_state_derived.c - fp2-dev/platform/external/mesa3d - Gitiles

 /**************************************************************************
  *
  * 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_math.h"
 #include "util/u_memory.h"
 #include "pipe/p_shader_tokens.h"
 #include "draw/draw_context.h"
 #include "draw/draw_vertex.h"
 #include "draw/draw_private.h"
 #include "lp_context.h"
 #include "lp_screen.h"
 #include "lp_tex_cache.h"
 #include "lp_state.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 llvmpipe_context *llvmpipe)
 {
    llvmpipe->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 *
 llvmpipe_get_vertex_info(struct llvmpipe_context *llvmpipe)
 {
    struct vertex_info *vinfo = &llvmpipe->vertex_info;

    if (vinfo->num_attribs == 0) {
       /* compute vertex layout now */
       const struct lp_fragment_shader *lpfs = llvmpipe->fs;
       struct vertex_info *vinfo_vbuf = &llvmpipe->vertex_info_vbuf;
       const uint num = draw_num_vs_outputs(llvmpipe->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 < lpfs->info.num_inputs; i++) {
          int src;
          enum interp_mode interp;

          switch (lpfs->info.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;
          default:
             assert(0);
             interp = INTERP_LINEAR;
          }

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

          case TGSI_SEMANTIC_COLOR:
             if (llvmpipe->rasterizer->flatshade) {
                interp = INTERP_CONSTANT;
             }
             break;
          }

          /* this includes texcoords and varying vars */
          src = draw_find_vs_output(llvmpipe->draw,
                                    lpfs->info.input_semantic_name[i],
                                    lpfs->info.input_semantic_index[i]);
          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
       }

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

       draw_compute_vertex_size(vinfo);
    }

    return vinfo;
 }


 /**
  * Called from vbuf module.
  *
  * Note that there's actually two different vertex layouts in llvmpipe.
  *
  * The normal one is computed in llvmpipe_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 llvmpipe vbuf code begins drawing, the normal vertex layout
  * will come into play again.
  */
 struct vertex_info *
 llvmpipe_get_vbuf_vertex_info(struct llvmpipe_context *llvmpipe)
 {
    (void) llvmpipe_get_vertex_info(llvmpipe);
    return &llvmpipe->vertex_info_vbuf;
 }


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

    /* LP_NEW_RASTERIZER
     */
    if (lp->rasterizer->scissor) {

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


 static void
 update_tgsi_samplers( struct llvmpipe_context *llvmpipe )
 {
    unsigned i;

    /* vertex shader samplers */
    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
       llvmpipe->tgsi.vert_samplers[i].sampler = llvmpipe->sampler[i];
       llvmpipe->tgsi.vert_samplers[i].texture = llvmpipe->texture[i];
       llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
    }

    /* fragment shader samplers */
    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
       llvmpipe->tgsi.frag_samplers[i].sampler = llvmpipe->sampler[i];
       llvmpipe->tgsi.frag_samplers[i].texture = llvmpipe->texture[i];
       llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
    }

    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
       lp_tex_tile_cache_validate_texture( llvmpipe->tex_cache[i] );
    }

    llvmpipe->jit_context.samplers = (struct tgsi_sampler **)llvmpipe->tgsi.frag_samplers_list;
 }

 /* Hopefully this will remain quite simple, otherwise need to pull in
  * something like the state tracker mechanism.
  */
 void llvmpipe_update_derived( struct llvmpipe_context *llvmpipe )
 {
    struct llvmpipe_screen *lp_screen = llvmpipe_screen(llvmpipe->pipe.screen);

    /* Check for updated textures.
     */
    if (llvmpipe->tex_timestamp != lp_screen->timestamp) {
       llvmpipe->tex_timestamp = lp_screen->timestamp;
       llvmpipe->dirty |= LP_NEW_TEXTURE;
    }

    if (llvmpipe->dirty & (LP_NEW_SAMPLER |
                           LP_NEW_TEXTURE))
       update_tgsi_samplers( llvmpipe );

    if (llvmpipe->dirty & (LP_NEW_RASTERIZER |
                           LP_NEW_FS |
                           LP_NEW_VS))
       invalidate_vertex_layout( llvmpipe );

    if (llvmpipe->dirty & (LP_NEW_SCISSOR |
                           LP_NEW_RASTERIZER |
                           LP_NEW_FRAMEBUFFER))
       compute_cliprect(llvmpipe);

    if (llvmpipe->dirty & (LP_NEW_FS |
                           LP_NEW_BLEND |
                           LP_NEW_DEPTH_STENCIL_ALPHA |
                           LP_NEW_SAMPLER |
                           LP_NEW_TEXTURE))
       llvmpipe_update_fs( llvmpipe );


    llvmpipe->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_math.h"
	#include "util/u_memory.h"
	#include "pipe/p_shader_tokens.h"
	#include "draw/draw_context.h"
	#include "draw/draw_vertex.h"
	#include "draw/draw_private.h"
	#include "lp_context.h"
	#include "lp_screen.h"
	#include "lp_tex_cache.h"
	#include "lp_state.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 llvmpipe_context *llvmpipe)
	{
	llvmpipe->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 *
	llvmpipe_get_vertex_info(struct llvmpipe_context *llvmpipe)
	{
	struct vertex_info *vinfo = &llvmpipe->vertex_info;

	if (vinfo->num_attribs == 0) {
	/* compute vertex layout now */
	const struct lp_fragment_shader *lpfs = llvmpipe->fs;
	struct vertex_info *vinfo_vbuf = &llvmpipe->vertex_info_vbuf;
	const uint num = draw_num_vs_outputs(llvmpipe->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 < lpfs->info.num_inputs; i++) {
	int src;
	enum interp_mode interp;

	switch (lpfs->info.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;
	default:
	assert(0);
	interp = INTERP_LINEAR;
	}

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

	case TGSI_SEMANTIC_COLOR:
	if (llvmpipe->rasterizer->flatshade) {
	interp = INTERP_CONSTANT;
	}
	break;
	}

	/* this includes texcoords and varying vars */
	src = draw_find_vs_output(llvmpipe->draw,
	lpfs->info.input_semantic_name[i],
	lpfs->info.input_semantic_index[i]);
	draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
	}

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

	draw_compute_vertex_size(vinfo);
	}

	return vinfo;
	}


	/**
	* Called from vbuf module.
	*
	* Note that there's actually two different vertex layouts in llvmpipe.
	*
	* The normal one is computed in llvmpipe_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 llvmpipe vbuf code begins drawing, the normal vertex layout
	* will come into play again.
	*/
	struct vertex_info *
	llvmpipe_get_vbuf_vertex_info(struct llvmpipe_context *llvmpipe)
	{
	(void) llvmpipe_get_vertex_info(llvmpipe);
	return &llvmpipe->vertex_info_vbuf;
	}


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

	/* LP_NEW_RASTERIZER
	*/
	if (lp->rasterizer->scissor) {

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


	static void
	update_tgsi_samplers( struct llvmpipe_context *llvmpipe )
	{
	unsigned i;

	/* vertex shader samplers */
	for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
	llvmpipe->tgsi.vert_samplers[i].sampler = llvmpipe->sampler[i];
	llvmpipe->tgsi.vert_samplers[i].texture = llvmpipe->texture[i];
	llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
	}

	/* fragment shader samplers */
	for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
	llvmpipe->tgsi.frag_samplers[i].sampler = llvmpipe->sampler[i];
	llvmpipe->tgsi.frag_samplers[i].texture = llvmpipe->texture[i];
	llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
	}

	for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
	lp_tex_tile_cache_validate_texture( llvmpipe->tex_cache[i] );
	}

	llvmpipe->jit_context.samplers = (struct tgsi_sampler **)llvmpipe->tgsi.frag_samplers_list;
	}

	/* Hopefully this will remain quite simple, otherwise need to pull in
	* something like the state tracker mechanism.
	*/
	void llvmpipe_update_derived( struct llvmpipe_context *llvmpipe )
	{
	struct llvmpipe_screen *lp_screen = llvmpipe_screen(llvmpipe->pipe.screen);

	/* Check for updated textures.
	*/
	if (llvmpipe->tex_timestamp != lp_screen->timestamp) {
	llvmpipe->tex_timestamp = lp_screen->timestamp;
	llvmpipe->dirty \|= LP_NEW_TEXTURE;
	}

	if (llvmpipe->dirty & (LP_NEW_SAMPLER \|
	LP_NEW_TEXTURE))
	update_tgsi_samplers( llvmpipe );

	if (llvmpipe->dirty & (LP_NEW_RASTERIZER \|
	LP_NEW_FS \|
	LP_NEW_VS))
	invalidate_vertex_layout( llvmpipe );

	if (llvmpipe->dirty & (LP_NEW_SCISSOR \|
	LP_NEW_RASTERIZER \|
	LP_NEW_FRAMEBUFFER))
	compute_cliprect(llvmpipe);

	if (llvmpipe->dirty & (LP_NEW_FS \|
	LP_NEW_BLEND \|
	LP_NEW_DEPTH_STENCIL_ALPHA \|
	LP_NEW_SAMPLER \|
	LP_NEW_TEXTURE))
	llvmpipe_update_fs( llvmpipe );


	llvmpipe->dirty = 0;
	}