src/gallium/drivers/svga/svga_pipe_sampler.c - platform/external/mesa3d - Git at Google

 /**********************************************************
  * Copyright 2008-2009 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, sublicense, 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 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
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  * 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 "pipe/p_defines.h"
 #include "util/u_format.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 #include "tgsi/tgsi_parse.h"

 #include "svga_context.h"
 #include "svga_resource_texture.h"

 #include "svga_debug.h"

 static INLINE unsigned
 translate_wrap_mode(unsigned wrap)
 {
    switch (wrap) {
    case PIPE_TEX_WRAP_REPEAT:
       return SVGA3D_TEX_ADDRESS_WRAP;

    case PIPE_TEX_WRAP_CLAMP:
       return SVGA3D_TEX_ADDRESS_CLAMP;

    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
       /* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
        * hardware.
        */
       return SVGA3D_TEX_ADDRESS_CLAMP;

    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
       return SVGA3D_TEX_ADDRESS_BORDER;

    case PIPE_TEX_WRAP_MIRROR_REPEAT:
       return SVGA3D_TEX_ADDRESS_MIRROR;

    case PIPE_TEX_WRAP_MIRROR_CLAMP:
    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
       return SVGA3D_TEX_ADDRESS_MIRRORONCE;

    default:
       assert(0);
       return SVGA3D_TEX_ADDRESS_WRAP;
    }
 }

 static INLINE unsigned translate_img_filter( unsigned filter )
 {
    switch (filter) {
    case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
    case PIPE_TEX_FILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
    default:
       assert(0);
       return SVGA3D_TEX_FILTER_NEAREST;
    }
 }

 static INLINE unsigned translate_mip_filter( unsigned filter )
 {
    switch (filter) {
    case PIPE_TEX_MIPFILTER_NONE:    return SVGA3D_TEX_FILTER_NONE;
    case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
    case PIPE_TEX_MIPFILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
    default:
       assert(0);
       return SVGA3D_TEX_FILTER_NONE;
    }
 }

 static void *
 svga_create_sampler_state(struct pipe_context *pipe,
                           const struct pipe_sampler_state *sampler)
 {
    struct svga_context *svga = svga_context(pipe);
    struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );

    if (!cso)
       return NULL;

    cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
    cso->magfilter = translate_img_filter( sampler->mag_img_filter );
    cso->minfilter = translate_img_filter( sampler->min_img_filter );
    cso->aniso_level = MAX2( sampler->max_anisotropy, 1 );
    if(sampler->max_anisotropy)
       cso->magfilter = cso->minfilter = SVGA3D_TEX_FILTER_ANISOTROPIC;
    cso->lod_bias = sampler->lod_bias;
    cso->addressu = translate_wrap_mode(sampler->wrap_s);
    cso->addressv = translate_wrap_mode(sampler->wrap_t);
    cso->addressw = translate_wrap_mode(sampler->wrap_r);
    cso->normalized_coords = sampler->normalized_coords;
    cso->compare_mode = sampler->compare_mode;
    cso->compare_func = sampler->compare_func;

    {
       uint32 r = float_to_ubyte(sampler->border_color.f[0]);
       uint32 g = float_to_ubyte(sampler->border_color.f[1]);
       uint32 b = float_to_ubyte(sampler->border_color.f[2]);
       uint32 a = float_to_ubyte(sampler->border_color.f[3]);

       cso->bordercolor = (a << 24) | (r << 16) | (g << 8) | b;
    }

    /* No SVGA3D support for:
     *    - min/max LOD clamping
     */
    cso->min_lod = 0;
    cso->view_min_lod = MAX2((int) (sampler->min_lod + 0.5), 0);
    cso->view_max_lod = MAX2((int) (sampler->max_lod + 0.5), 0);

    /* Use min_mipmap */
    if (svga->debug.use_min_mipmap) {
       if (cso->view_min_lod == cso->view_max_lod) {
          cso->min_lod = cso->view_min_lod;
          cso->view_min_lod = 0;
          cso->view_max_lod = 1000; /* Just a high number */
          cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
       }
    }

    SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
             cso->min_lod, cso->view_min_lod, cso->view_max_lod,
             cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");

    return cso;
 }

 static void
 svga_bind_sampler_states(struct pipe_context *pipe,
                          unsigned shader,
                          unsigned start,
                          unsigned num,
                          void **samplers)
 {
    struct svga_context *svga = svga_context(pipe);
    unsigned i;

    assert(shader < PIPE_SHADER_TYPES);
    assert(start + num <= PIPE_MAX_SAMPLERS);

    /* we only support fragment shader samplers at this time */
    if (shader != PIPE_SHADER_FRAGMENT)
       return;

    /* Check for no-op */
    if (start + num <= svga->curr.num_samplers &&
        !memcmp(svga->curr.sampler + start, samplers, num * sizeof(void *))) {
       if (0) debug_printf("sampler noop\n");
       return;
    }

    for (i = 0; i < num; i++)
       svga->curr.sampler[start + i] = samplers[i];

    /* find highest non-null sampler_views[] entry */
    {
       unsigned j = MAX2(svga->curr.num_samplers, start + num);
       while (j > 0 && svga->curr.sampler[j - 1] == NULL)
          j--;
       svga->curr.num_samplers = j;
    }

    svga->dirty |= SVGA_NEW_SAMPLER;
 }


 static void
 svga_bind_fragment_sampler_states(struct pipe_context *pipe,
                                   unsigned num, void **sampler)
 {
    svga_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0, num, sampler);
 }


 static void svga_delete_sampler_state(struct pipe_context *pipe,
                                       void *sampler)
 {
    FREE(sampler);
 }


 static struct pipe_sampler_view *
 svga_create_sampler_view(struct pipe_context *pipe,
                          struct pipe_resource *texture,
                          const struct pipe_sampler_view *templ)
 {
    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);

    if (view) {
       *view = *templ;
       view->reference.count = 1;
       view->texture = NULL;
       pipe_resource_reference(&view->texture, texture);
       view->context = pipe;
    }

    return view;
 }


 static void
 svga_sampler_view_destroy(struct pipe_context *pipe,
                           struct pipe_sampler_view *view)
 {
    pipe_resource_reference(&view->texture, NULL);
    FREE(view);
 }

 static void
 svga_set_sampler_views(struct pipe_context *pipe,
                        unsigned shader,
                        unsigned start,
                        unsigned num,
                        struct pipe_sampler_view **views)
 {
    struct svga_context *svga = svga_context(pipe);
    unsigned flag_1d = 0;
    unsigned flag_srgb = 0;
    uint i;

    assert(shader < PIPE_SHADER_TYPES);
    assert(start + num <= Elements(svga->curr.sampler_views));

    /* we only support fragment shader sampler views at this time */
    if (shader != PIPE_SHADER_FRAGMENT)
       return;

    /* Check for no-op */
    if (start + num <= svga->curr.num_sampler_views &&
        !memcmp(svga->curr.sampler_views + start, views,
                num * sizeof(struct pipe_sampler_view *))) {
       if (0) debug_printf("texture noop\n");
       return;
    }

    for (i = 0; i < num; i++) {
       if (svga->curr.sampler_views[start + i] != views[i]) {
          /* Note: we're using pipe_sampler_view_release() here to work around
           * a possible crash when the old view belongs to another context that
           * was already destroyed.
           */
          pipe_sampler_view_release(pipe, &svga->curr.sampler_views[start + i]);
          pipe_sampler_view_reference(&svga->curr.sampler_views[start + i],
                                      views[i]);
       }

       if (!views[i])
          continue;

       if (util_format_is_srgb(views[i]->format))
          flag_srgb |= 1 << (start + i);

       if (views[i]->texture->target == PIPE_TEXTURE_1D)
          flag_1d |= 1 << (start + i);
    }

    /* find highest non-null sampler_views[] entry */
    {
       unsigned j = MAX2(svga->curr.num_sampler_views, start + num);
       while (j > 0 && svga->curr.sampler_views[j - 1] == NULL)
          j--;
       svga->curr.num_sampler_views = j;
    }

    svga->dirty |= SVGA_NEW_TEXTURE_BINDING;

    if (flag_srgb != svga->curr.tex_flags.flag_srgb ||
        flag_1d != svga->curr.tex_flags.flag_1d)
    {
       svga->dirty |= SVGA_NEW_TEXTURE_FLAGS;
       svga->curr.tex_flags.flag_1d = flag_1d;
       svga->curr.tex_flags.flag_srgb = flag_srgb;
    }
 }


 static void
 svga_set_fragment_sampler_views(struct pipe_context *pipe,
                                 unsigned num,
                                 struct pipe_sampler_view **views)
 {
    svga_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, num, views);
 }


 void svga_init_sampler_functions( struct svga_context *svga )
 {
    svga->pipe.create_sampler_state = svga_create_sampler_state;
    svga->pipe.bind_fragment_sampler_states = svga_bind_fragment_sampler_states;
    svga->pipe.delete_sampler_state = svga_delete_sampler_state;
    svga->pipe.set_fragment_sampler_views = svga_set_fragment_sampler_views;
    svga->pipe.create_sampler_view = svga_create_sampler_view;
    svga->pipe.sampler_view_destroy = svga_sampler_view_destroy;
 }
	/**********************************************************
	* Copyright 2008-2009 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, sublicense, 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 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
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	* 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 "pipe/p_defines.h"
	#include "util/u_format.h"
	#include "util/u_math.h"
	#include "util/u_memory.h"
	#include "tgsi/tgsi_parse.h"

	#include "svga_context.h"
	#include "svga_resource_texture.h"

	#include "svga_debug.h"

	static INLINE unsigned
	translate_wrap_mode(unsigned wrap)
	{
	switch (wrap) {
	case PIPE_TEX_WRAP_REPEAT:
	return SVGA3D_TEX_ADDRESS_WRAP;

	case PIPE_TEX_WRAP_CLAMP:
	return SVGA3D_TEX_ADDRESS_CLAMP;

	case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
	/* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
	* hardware.
	*/
	return SVGA3D_TEX_ADDRESS_CLAMP;

	case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
	return SVGA3D_TEX_ADDRESS_BORDER;

	case PIPE_TEX_WRAP_MIRROR_REPEAT:
	return SVGA3D_TEX_ADDRESS_MIRROR;

	case PIPE_TEX_WRAP_MIRROR_CLAMP:
	case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
	case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
	return SVGA3D_TEX_ADDRESS_MIRRORONCE;

	default:
	assert(0);
	return SVGA3D_TEX_ADDRESS_WRAP;
	}
	}

	static INLINE unsigned translate_img_filter( unsigned filter )
	{
	switch (filter) {
	case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
	case PIPE_TEX_FILTER_LINEAR: return SVGA3D_TEX_FILTER_LINEAR;
	default:
	assert(0);
	return SVGA3D_TEX_FILTER_NEAREST;
	}
	}

	static INLINE unsigned translate_mip_filter( unsigned filter )
	{
	switch (filter) {
	case PIPE_TEX_MIPFILTER_NONE: return SVGA3D_TEX_FILTER_NONE;
	case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
	case PIPE_TEX_MIPFILTER_LINEAR: return SVGA3D_TEX_FILTER_LINEAR;
	default:
	assert(0);
	return SVGA3D_TEX_FILTER_NONE;
	}
	}

	static void *
	svga_create_sampler_state(struct pipe_context *pipe,
	const struct pipe_sampler_state *sampler)
	{
	struct svga_context *svga = svga_context(pipe);
	struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );

	if (!cso)
	return NULL;

	cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
	cso->magfilter = translate_img_filter( sampler->mag_img_filter );
	cso->minfilter = translate_img_filter( sampler->min_img_filter );
	cso->aniso_level = MAX2( sampler->max_anisotropy, 1 );
	if(sampler->max_anisotropy)
	cso->magfilter = cso->minfilter = SVGA3D_TEX_FILTER_ANISOTROPIC;
	cso->lod_bias = sampler->lod_bias;
	cso->addressu = translate_wrap_mode(sampler->wrap_s);
	cso->addressv = translate_wrap_mode(sampler->wrap_t);
	cso->addressw = translate_wrap_mode(sampler->wrap_r);
	cso->normalized_coords = sampler->normalized_coords;
	cso->compare_mode = sampler->compare_mode;
	cso->compare_func = sampler->compare_func;

	{
	uint32 r = float_to_ubyte(sampler->border_color.f[0]);
	uint32 g = float_to_ubyte(sampler->border_color.f[1]);
	uint32 b = float_to_ubyte(sampler->border_color.f[2]);
	uint32 a = float_to_ubyte(sampler->border_color.f[3]);

	cso->bordercolor = (a << 24) \| (r << 16) \| (g << 8) \| b;
	}

	/* No SVGA3D support for:
	* - min/max LOD clamping
	*/
	cso->min_lod = 0;
	cso->view_min_lod = MAX2((int) (sampler->min_lod + 0.5), 0);
	cso->view_max_lod = MAX2((int) (sampler->max_lod + 0.5), 0);

	/* Use min_mipmap */
	if (svga->debug.use_min_mipmap) {
	if (cso->view_min_lod == cso->view_max_lod) {
	cso->min_lod = cso->view_min_lod;
	cso->view_min_lod = 0;
	cso->view_max_lod = 1000; /* Just a high number */
	cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
	}
	}

	SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
	cso->min_lod, cso->view_min_lod, cso->view_max_lod,
	cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");

	return cso;
	}

	static void
	svga_bind_sampler_states(struct pipe_context *pipe,
	unsigned shader,
	unsigned start,
	unsigned num,
	void **samplers)
	{
	struct svga_context *svga = svga_context(pipe);
	unsigned i;

	assert(shader < PIPE_SHADER_TYPES);
	assert(start + num <= PIPE_MAX_SAMPLERS);

	/* we only support fragment shader samplers at this time */
	if (shader != PIPE_SHADER_FRAGMENT)
	return;

	/* Check for no-op */
	if (start + num <= svga->curr.num_samplers &&
	!memcmp(svga->curr.sampler + start, samplers, num * sizeof(void *))) {
	if (0) debug_printf("sampler noop\n");
	return;
	}

	for (i = 0; i < num; i++)
	svga->curr.sampler[start + i] = samplers[i];

	/* find highest non-null sampler_views[] entry */
	{
	unsigned j = MAX2(svga->curr.num_samplers, start + num);
	while (j > 0 && svga->curr.sampler[j - 1] == NULL)
	j--;
	svga->curr.num_samplers = j;
	}

	svga->dirty \|= SVGA_NEW_SAMPLER;
	}


	static void
	svga_bind_fragment_sampler_states(struct pipe_context *pipe,
	unsigned num, void **sampler)
	{
	svga_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0, num, sampler);
	}


	static void svga_delete_sampler_state(struct pipe_context *pipe,
	void *sampler)
	{
	FREE(sampler);
	}


	static struct pipe_sampler_view *
	svga_create_sampler_view(struct pipe_context *pipe,
	struct pipe_resource *texture,
	const struct pipe_sampler_view *templ)
	{
	struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);

	if (view) {
	view = templ;
	view->reference.count = 1;
	view->texture = NULL;
	pipe_resource_reference(&view->texture, texture);
	view->context = pipe;
	}

	return view;
	}


	static void
	svga_sampler_view_destroy(struct pipe_context *pipe,
	struct pipe_sampler_view *view)
	{
	pipe_resource_reference(&view->texture, NULL);
	FREE(view);
	}

	static void
	svga_set_sampler_views(struct pipe_context *pipe,
	unsigned shader,
	unsigned start,
	unsigned num,
	struct pipe_sampler_view **views)
	{
	struct svga_context *svga = svga_context(pipe);
	unsigned flag_1d = 0;
	unsigned flag_srgb = 0;
	uint i;

	assert(shader < PIPE_SHADER_TYPES);
	assert(start + num <= Elements(svga->curr.sampler_views));

	/* we only support fragment shader sampler views at this time */
	if (shader != PIPE_SHADER_FRAGMENT)
	return;

	/* Check for no-op */
	if (start + num <= svga->curr.num_sampler_views &&
	!memcmp(svga->curr.sampler_views + start, views,
	num * sizeof(struct pipe_sampler_view *))) {
	if (0) debug_printf("texture noop\n");
	return;
	}

	for (i = 0; i < num; i++) {
	if (svga->curr.sampler_views[start + i] != views[i]) {
	/* Note: we're using pipe_sampler_view_release() here to work around
	* a possible crash when the old view belongs to another context that
	* was already destroyed.
	*/
	pipe_sampler_view_release(pipe, &svga->curr.sampler_views[start + i]);
	pipe_sampler_view_reference(&svga->curr.sampler_views[start + i],
	views[i]);
	}

	if (!views[i])
	continue;

	if (util_format_is_srgb(views[i]->format))
	flag_srgb \|= 1 << (start + i);

	if (views[i]->texture->target == PIPE_TEXTURE_1D)
	flag_1d \|= 1 << (start + i);
	}

	/* find highest non-null sampler_views[] entry */
	{
	unsigned j = MAX2(svga->curr.num_sampler_views, start + num);
	while (j > 0 && svga->curr.sampler_views[j - 1] == NULL)
	j--;
	svga->curr.num_sampler_views = j;
	}

	svga->dirty \|= SVGA_NEW_TEXTURE_BINDING;

	if (flag_srgb != svga->curr.tex_flags.flag_srgb \|\|
	flag_1d != svga->curr.tex_flags.flag_1d)
	{
	svga->dirty \|= SVGA_NEW_TEXTURE_FLAGS;
	svga->curr.tex_flags.flag_1d = flag_1d;
	svga->curr.tex_flags.flag_srgb = flag_srgb;
	}
	}


	static void
	svga_set_fragment_sampler_views(struct pipe_context *pipe,
	unsigned num,
	struct pipe_sampler_view **views)
	{
	svga_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, num, views);
	}


	void svga_init_sampler_functions( struct svga_context *svga )
	{
	svga->pipe.create_sampler_state = svga_create_sampler_state;
	svga->pipe.bind_fragment_sampler_states = svga_bind_fragment_sampler_states;
	svga->pipe.delete_sampler_state = svga_delete_sampler_state;
	svga->pipe.set_fragment_sampler_views = svga_set_fragment_sampler_views;
	svga->pipe.create_sampler_view = svga_create_sampler_view;
	svga->pipe.sampler_view_destroy = svga_sampler_view_destroy;
	}