src/mesa/state_tracker/st_atom_sampler.c - fp2-dev/platform/external/mesa3d - Gitiles

 /**************************************************************************
  *
  * Copyright 2007 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.
  *
  **************************************************************************/

  /*
   * Authors:
   *   Keith Whitwell <keith@tungstengraphics.com>
   *   Brian Paul
   */


 #include "main/macros.h"

 #include "st_context.h"
 #include "st_cb_texture.h"
 #include "st_atom.h"
 #include "st_program.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"

 #include "cso_cache/cso_context.h"


 /**
  * Convert GLenum texcoord wrap tokens to pipe tokens.
  */
 static GLuint
 gl_wrap_xlate(GLenum wrap)
 {
    switch (wrap) {
    case GL_REPEAT:
       return PIPE_TEX_WRAP_REPEAT;
    case GL_CLAMP:
       return PIPE_TEX_WRAP_CLAMP;
    case GL_CLAMP_TO_EDGE:
       return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
    case GL_CLAMP_TO_BORDER:
       return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
    case GL_MIRRORED_REPEAT:
       return PIPE_TEX_WRAP_MIRROR_REPEAT;
    case GL_MIRROR_CLAMP_EXT:
       return PIPE_TEX_WRAP_MIRROR_CLAMP;
    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
    default:
       assert(0);
       return 0;
    }
 }


 static GLuint
 gl_filter_to_mip_filter(GLenum filter)
 {
    switch (filter) {
    case GL_NEAREST:
    case GL_LINEAR:
       return PIPE_TEX_MIPFILTER_NONE;

    case GL_NEAREST_MIPMAP_NEAREST:
    case GL_LINEAR_MIPMAP_NEAREST:
       return PIPE_TEX_MIPFILTER_NEAREST;

    case GL_NEAREST_MIPMAP_LINEAR:
    case GL_LINEAR_MIPMAP_LINEAR:
       return PIPE_TEX_MIPFILTER_LINEAR;

    default:
       assert(0);
       return PIPE_TEX_MIPFILTER_NONE;
    }
 }


 static GLuint
 gl_filter_to_img_filter(GLenum filter)
 {
    switch (filter) {
    case GL_NEAREST:
    case GL_NEAREST_MIPMAP_NEAREST:
    case GL_NEAREST_MIPMAP_LINEAR:
       return PIPE_TEX_FILTER_NEAREST;

    case GL_LINEAR:
    case GL_LINEAR_MIPMAP_NEAREST:
    case GL_LINEAR_MIPMAP_LINEAR:
       return PIPE_TEX_FILTER_LINEAR;

    default:
       assert(0);
       return PIPE_TEX_FILTER_NEAREST;
    }
 }


 static void
 xlate_border_color(const GLfloat *colorIn, GLenum baseFormat, GLfloat *colorOut)
 {
    switch (baseFormat) {
    case GL_RGB:
       colorOut[0] = colorIn[0];
       colorOut[1] = colorIn[1];
       colorOut[2] = colorIn[2];
       colorOut[3] = 1.0F;
       break;
    case GL_ALPHA:
       colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
       colorOut[3] = colorIn[3];
       break;
    case GL_LUMINANCE:
       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
       colorOut[3] = 1.0;
       break;
    case GL_LUMINANCE_ALPHA:
       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
       colorOut[3] = colorIn[3];
       break;
    case GL_INTENSITY:
       colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
       break;
    default:
       COPY_4V(colorOut, colorIn);
    }
 }


 static void
 update_samplers(struct st_context *st)
 {
    struct gl_vertex_program *vprog = st->ctx->VertexProgram._Current;
    struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current;
    const GLbitfield samplersUsed = (vprog->Base.SamplersUsed |
                                     fprog->Base.SamplersUsed);
    GLuint su;

    st->state.num_samplers = 0;

    /* loop over sampler units (aka tex image units) */
    for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) {
       struct pipe_sampler_state *sampler = st->state.samplers + su;

       memset(sampler, 0, sizeof(*sampler));

       if (samplersUsed & (1 << su)) {
          struct gl_texture_object *texobj;
          struct gl_texture_image *teximg;
          GLuint texUnit;

          if (fprog->Base.SamplersUsed & (1 << su))
             texUnit = fprog->Base.SamplerUnits[su];
          else
             texUnit = vprog->Base.SamplerUnits[su];

          texobj = st->ctx->Texture.Unit[texUnit]._Current;
          if (!texobj) {
             texobj = st_get_default_texture(st);
          }

          teximg = texobj->Image[0][texobj->BaseLevel];

          sampler->wrap_s = gl_wrap_xlate(texobj->WrapS);
          sampler->wrap_t = gl_wrap_xlate(texobj->WrapT);
          sampler->wrap_r = gl_wrap_xlate(texobj->WrapR);

          sampler->min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
          sampler->min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
          sampler->mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);

          if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
             sampler->normalized_coords = 1;

          sampler->lod_bias = st->ctx->Texture.Unit[su].LodBias;
          sampler->min_lod = MAX2(0.0f, texobj->MinLod);
          sampler->max_lod = MIN2(texobj->MaxLevel - texobj->BaseLevel,
                                  texobj->MaxLod);
          if (sampler->max_lod < sampler->min_lod) {
             /* The GL spec doesn't seem to specify what to do in this case.
              * Swap the values.
              */
             float tmp = sampler->max_lod;
             sampler->max_lod = sampler->min_lod;
             sampler->min_lod = tmp;
             assert(sampler->min_lod <= sampler->max_lod);
          }

          xlate_border_color(texobj->BorderColor,
                             teximg ? teximg->_BaseFormat : GL_RGBA,
                             sampler->border_color);

 	 sampler->max_anisotropy = texobj->MaxAnisotropy;
          if (sampler->max_anisotropy > 1.0) {
             sampler->min_img_filter = PIPE_TEX_FILTER_ANISO;
             sampler->mag_img_filter = PIPE_TEX_FILTER_ANISO;
          }

          /* only care about ARB_shadow, not SGI shadow */
          if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
             sampler->compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
             sampler->compare_func
                = st_compare_func_to_pipe(texobj->CompareFunc);
          }

          st->state.num_samplers = su + 1;

          /*printf("%s su=%u non-null\n", __FUNCTION__, su);*/
          cso_single_sampler(st->cso_context, su, sampler);
       }
       else {
          /*printf("%s su=%u null\n", __FUNCTION__, su);*/
          cso_single_sampler(st->cso_context, su, NULL);
       }
    }

    cso_single_sampler_done(st->cso_context);
 }


 const struct st_tracked_state st_update_sampler = {
    "st_update_sampler",					/* name */
    {							/* dirty */
       _NEW_TEXTURE,					/* mesa */
       0,						/* st */
    },
    update_samplers					/* update */
 };
	/**************************************************************************
	*
	* Copyright 2007 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.
	*
	**************************************************************************/

	/*
	* Authors:
	* Keith Whitwell <keith@tungstengraphics.com>
	* Brian Paul
	*/


	#include "main/macros.h"

	#include "st_context.h"
	#include "st_cb_texture.h"
	#include "st_atom.h"
	#include "st_program.h"
	#include "pipe/p_context.h"
	#include "pipe/p_defines.h"

	#include "cso_cache/cso_context.h"


	/**
	* Convert GLenum texcoord wrap tokens to pipe tokens.
	*/
	static GLuint
	gl_wrap_xlate(GLenum wrap)
	{
	switch (wrap) {
	case GL_REPEAT:
	return PIPE_TEX_WRAP_REPEAT;
	case GL_CLAMP:
	return PIPE_TEX_WRAP_CLAMP;
	case GL_CLAMP_TO_EDGE:
	return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
	case GL_CLAMP_TO_BORDER:
	return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
	case GL_MIRRORED_REPEAT:
	return PIPE_TEX_WRAP_MIRROR_REPEAT;
	case GL_MIRROR_CLAMP_EXT:
	return PIPE_TEX_WRAP_MIRROR_CLAMP;
	case GL_MIRROR_CLAMP_TO_EDGE_EXT:
	return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
	case GL_MIRROR_CLAMP_TO_BORDER_EXT:
	return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
	default:
	assert(0);
	return 0;
	}
	}


	static GLuint
	gl_filter_to_mip_filter(GLenum filter)
	{
	switch (filter) {
	case GL_NEAREST:
	case GL_LINEAR:
	return PIPE_TEX_MIPFILTER_NONE;

	case GL_NEAREST_MIPMAP_NEAREST:
	case GL_LINEAR_MIPMAP_NEAREST:
	return PIPE_TEX_MIPFILTER_NEAREST;

	case GL_NEAREST_MIPMAP_LINEAR:
	case GL_LINEAR_MIPMAP_LINEAR:
	return PIPE_TEX_MIPFILTER_LINEAR;

	default:
	assert(0);
	return PIPE_TEX_MIPFILTER_NONE;
	}
	}


	static GLuint
	gl_filter_to_img_filter(GLenum filter)
	{
	switch (filter) {
	case GL_NEAREST:
	case GL_NEAREST_MIPMAP_NEAREST:
	case GL_NEAREST_MIPMAP_LINEAR:
	return PIPE_TEX_FILTER_NEAREST;

	case GL_LINEAR:
	case GL_LINEAR_MIPMAP_NEAREST:
	case GL_LINEAR_MIPMAP_LINEAR:
	return PIPE_TEX_FILTER_LINEAR;

	default:
	assert(0);
	return PIPE_TEX_FILTER_NEAREST;
	}
	}


	static void
	xlate_border_color(const GLfloat colorIn, GLenum baseFormat, GLfloat colorOut)
	{
	switch (baseFormat) {
	case GL_RGB:
	colorOut[0] = colorIn[0];
	colorOut[1] = colorIn[1];
	colorOut[2] = colorIn[2];
	colorOut[3] = 1.0F;
	break;
	case GL_ALPHA:
	colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
	colorOut[3] = colorIn[3];
	break;
	case GL_LUMINANCE:
	colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
	colorOut[3] = 1.0;
	break;
	case GL_LUMINANCE_ALPHA:
	colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
	colorOut[3] = colorIn[3];
	break;
	case GL_INTENSITY:
	colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
	break;
	default:
	COPY_4V(colorOut, colorIn);
	}
	}


	static void
	update_samplers(struct st_context *st)
	{
	struct gl_vertex_program *vprog = st->ctx->VertexProgram._Current;
	struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current;
	const GLbitfield samplersUsed = (vprog->Base.SamplersUsed \|
	fprog->Base.SamplersUsed);
	GLuint su;

	st->state.num_samplers = 0;

	/* loop over sampler units (aka tex image units) */
	for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) {
	struct pipe_sampler_state *sampler = st->state.samplers + su;

	memset(sampler, 0, sizeof(*sampler));

	if (samplersUsed & (1 << su)) {
	struct gl_texture_object *texobj;
	struct gl_texture_image *teximg;
	GLuint texUnit;

	if (fprog->Base.SamplersUsed & (1 << su))
	texUnit = fprog->Base.SamplerUnits[su];
	else
	texUnit = vprog->Base.SamplerUnits[su];

	texobj = st->ctx->Texture.Unit[texUnit]._Current;
	if (!texobj) {
	texobj = st_get_default_texture(st);
	}

	teximg = texobj->Image[0][texobj->BaseLevel];

	sampler->wrap_s = gl_wrap_xlate(texobj->WrapS);
	sampler->wrap_t = gl_wrap_xlate(texobj->WrapT);
	sampler->wrap_r = gl_wrap_xlate(texobj->WrapR);

	sampler->min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
	sampler->min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
	sampler->mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);

	if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
	sampler->normalized_coords = 1;

	sampler->lod_bias = st->ctx->Texture.Unit[su].LodBias;
	sampler->min_lod = MAX2(0.0f, texobj->MinLod);
	sampler->max_lod = MIN2(texobj->MaxLevel - texobj->BaseLevel,
	texobj->MaxLod);
	if (sampler->max_lod < sampler->min_lod) {
	/* The GL spec doesn't seem to specify what to do in this case.
	* Swap the values.
	*/
	float tmp = sampler->max_lod;
	sampler->max_lod = sampler->min_lod;
	sampler->min_lod = tmp;
	assert(sampler->min_lod <= sampler->max_lod);
	}

	xlate_border_color(texobj->BorderColor,
	teximg ? teximg->_BaseFormat : GL_RGBA,
	sampler->border_color);

	sampler->max_anisotropy = texobj->MaxAnisotropy;
	if (sampler->max_anisotropy > 1.0) {
	sampler->min_img_filter = PIPE_TEX_FILTER_ANISO;
	sampler->mag_img_filter = PIPE_TEX_FILTER_ANISO;
	}

	/* only care about ARB_shadow, not SGI shadow */
	if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
	sampler->compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
	sampler->compare_func
	= st_compare_func_to_pipe(texobj->CompareFunc);
	}

	st->state.num_samplers = su + 1;

	/printf("%s su=%u non-null\n", __FUNCTION__, su);/
	cso_single_sampler(st->cso_context, su, sampler);
	}
	else {
	/printf("%s su=%u null\n", __FUNCTION__, su);/
	cso_single_sampler(st->cso_context, su, NULL);
	}
	}

	cso_single_sampler_done(st->cso_context);
	}


	const struct st_tracked_state st_update_sampler = {
	"st_update_sampler", /* name */
	{ /* dirty */
	_NEW_TEXTURE, /* mesa */
	0, /* st */
	},
	update_samplers /* update */
	};