src/gallium/auxiliary/draw/draw_pt_emit.c - third_party/mesa - Git at Google

 /**************************************************************************
  *
  * Copyright 2008 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 "util/u_memory.h"
 #include "draw/draw_context.h"
 #include "draw/draw_private.h"
 #include "draw/draw_vbuf.h"
 #include "draw/draw_vertex.h"
 #include "draw/draw_pt.h"
 #include "translate/translate.h"
 #include "translate/translate_cache.h"
 #include "util/u_prim.h"

 struct pt_emit {
    struct draw_context *draw;

    struct translate *translate;

    struct translate_cache *cache;
    unsigned prim;

    const struct vertex_info *vinfo;

    float zero4[4];
 };


 void
 draw_pt_emit_prepare(struct pt_emit *emit,
                      enum pipe_prim_type prim,
                      unsigned *max_vertices)
 {
    struct draw_context *draw = emit->draw;
    const struct vertex_info *vinfo;
    struct translate_key hw_key;

    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
     */
    draw_do_flush(draw, DRAW_FLUSH_BACKEND);

    /* XXX: may need to defensively reset this later on as clipping can
     * clobber this state in the render backend.
     */
    emit->prim = prim;

    draw->render->set_primitive(draw->render, emit->prim);
    if (draw->render->set_view_index)
       draw->render->set_view_index(draw->render, draw->pt.user.viewid);

    /* Must do this after set_primitive() above:
     */
    emit->vinfo = vinfo = draw->render->get_vertex_info(draw->render);

    /* Translate from pipeline vertices to hw vertices.
     */
    unsigned dst_offset = 0;
    for (unsigned i = 0; i < vinfo->num_attribs; i++) {
       unsigned emit_sz = 0;
       unsigned src_buffer = 0;
       unsigned output_format;
       unsigned src_offset = vinfo->attrib[i].src_index * 4 * sizeof(float);

       output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
       emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);

       /* doesn't handle EMIT_OMIT */
       assert(emit_sz != 0);

       if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
          src_buffer = 1;
          src_offset = 0;
       } else if (vinfo->attrib[i].src_index == DRAW_ATTR_NONEXIST) {
          /* elements which don't exist will get assigned zeros */
          src_buffer = 2;
          src_offset = 0;
       }

       hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
       hw_key.element[i].input_buffer = src_buffer;
       hw_key.element[i].input_offset = src_offset;
       hw_key.element[i].instance_divisor = 0;
       hw_key.element[i].output_format = output_format;
       hw_key.element[i].output_offset = dst_offset;

       dst_offset += emit_sz;
    }

    hw_key.nr_elements = vinfo->num_attribs;
    hw_key.output_stride = vinfo->size * 4;

    if (!emit->translate ||
        translate_key_compare(&emit->translate->key, &hw_key) != 0) {
       translate_key_sanitize(&hw_key);
       emit->translate = translate_cache_find(emit->cache, &hw_key);

       emit->translate->set_buffer(emit->translate, 2, &emit->zero4[0], 0, ~0);
    }

    if (!vinfo->size)
       *max_vertices = 0;
    else
       *max_vertices = (draw->render->max_vertex_buffer_bytes /
                        (vinfo->size * 4));
 }


 void
 draw_pt_emit(struct pt_emit *emit,
              const struct draw_vertex_info *vert_info,
              const struct draw_prim_info *prim_info)
 {
    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
    unsigned vertex_count = vert_info->count;
    unsigned stride = vert_info->stride;
    const ushort *elts = prim_info->elts;
    struct draw_context *draw = emit->draw;
    struct translate *translate = emit->translate;
    struct vbuf_render *render = draw->render;
    unsigned start, i;
    void *hw_verts;

    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
     */
    draw_do_flush(draw, DRAW_FLUSH_BACKEND);

    if (vertex_count == 0)
       return;

    /* XXX: and work out some way to coordinate the render primitive
     * between vbuf.c and here...
     */
    render->set_primitive(draw->render, prim_info->prim);
    if (draw->render->set_view_index)
       draw->render->set_view_index(draw->render, draw->pt.user.viewid);

    assert(vertex_count <= 65535);
    render->allocate_vertices(render,
                              (ushort)translate->key.output_stride,
                              (ushort)vertex_count);

    hw_verts = render->map_vertices(render);
    if (!hw_verts) {
       debug_warn_once("map of vertex buffer failed (out of memory?)");
       return;
    }

    translate->set_buffer(translate,
                          0,
                          vertex_data,
                          stride,
                          ~0);

    translate->set_buffer(translate,
                          1,
                          &draw->rasterizer->point_size,
                          0,
                          ~0);

    /* fetch/translate vertex attribs to fill hw_verts[] */
    translate->run(translate,
                   0,
                   vertex_count,
                   0,
                   0,
                   hw_verts);

    render->unmap_vertices(render, 0, vertex_count - 1);

    for (start = i = 0;
         i < prim_info->primitive_count;
         start += prim_info->primitive_lengths[i], i++) {
       render->draw_elements(render,
                             elts + start,
                             prim_info->primitive_lengths[i]);
    }

    render->release_vertices(render);
 }


 void
 draw_pt_emit_linear(struct pt_emit *emit,
                     const struct draw_vertex_info *vert_info,
                     const struct draw_prim_info *prim_info)
 {
    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
    unsigned stride = vert_info->stride;
    unsigned count = vert_info->count;
    struct draw_context *draw = emit->draw;
    struct translate *translate = emit->translate;
    struct vbuf_render *render = draw->render;
    void *hw_verts;
    unsigned start, i;

 #if 0
    debug_printf("Linear emit\n");
 #endif
    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
     */
    draw_do_flush(draw, DRAW_FLUSH_BACKEND);

    /* XXX: and work out some way to coordinate the render primitive
     * between vbuf.c and here...
     */
    render->set_primitive(draw->render, prim_info->prim);
    if (draw->render->set_view_index)
       draw->render->set_view_index(draw->render, draw->pt.user.viewid);

    assert(count <= 65535);
    if (!render->allocate_vertices(render,
                                   (ushort)translate->key.output_stride,
                                   (ushort)count))
       goto fail;

    hw_verts = render->map_vertices(render);
    if (!hw_verts)
       goto fail;

    translate->set_buffer(translate, 0,
                          vertex_data, stride, count - 1);

    translate->set_buffer(translate, 1,
                          &draw->rasterizer->point_size,
                          0, ~0);

    translate->run(translate,
                   0,
                   count,
                   0,
                   0,
                   hw_verts);

    if (0) {
       for (unsigned i = 0; i < count; i++) {
          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
          draw_dump_emitted_vertex(emit->vinfo,
                                   (const uint8_t *)hw_verts +
                                   translate->key.output_stride * i);
       }
    }

    render->unmap_vertices(render, 0, count - 1);

    for (start = i = 0;
         i < prim_info->primitive_count;
         start += prim_info->primitive_lengths[i], i++) {
       render->draw_arrays(render,
                           start,
                           prim_info->primitive_lengths[i]);
    }

    render->release_vertices(render);

    return;

 fail:
    debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
    return;
 }


 struct pt_emit *
 draw_pt_emit_create(struct draw_context *draw)
 {
    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
    if (!emit)
       return NULL;

    emit->draw = draw;
    emit->cache = translate_cache_create();
    if (!emit->cache) {
       FREE(emit);
       return NULL;
    }

    emit->zero4[0] = emit->zero4[1] = emit->zero4[2] = emit->zero4[3] = 0.0f;

    return emit;
 }


 void
 draw_pt_emit_destroy(struct pt_emit *emit)
 {
    if (emit->cache)
       translate_cache_destroy(emit->cache);

    FREE(emit);
 }
	/**************************************************************************
	*
	* Copyright 2008 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 "util/u_memory.h"
	#include "draw/draw_context.h"
	#include "draw/draw_private.h"
	#include "draw/draw_vbuf.h"
	#include "draw/draw_vertex.h"
	#include "draw/draw_pt.h"
	#include "translate/translate.h"
	#include "translate/translate_cache.h"
	#include "util/u_prim.h"

	struct pt_emit {
	struct draw_context *draw;

	struct translate *translate;

	struct translate_cache *cache;
	unsigned prim;

	const struct vertex_info *vinfo;

	float zero4[4];
	};


	void
	draw_pt_emit_prepare(struct pt_emit *emit,
	enum pipe_prim_type prim,
	unsigned *max_vertices)
	{
	struct draw_context *draw = emit->draw;
	const struct vertex_info *vinfo;
	struct translate_key hw_key;

	/* XXX: need to flush to get prim_vbuf.c to release its allocation??
	*/
	draw_do_flush(draw, DRAW_FLUSH_BACKEND);

	/* XXX: may need to defensively reset this later on as clipping can
	* clobber this state in the render backend.
	*/
	emit->prim = prim;

	draw->render->set_primitive(draw->render, emit->prim);
	if (draw->render->set_view_index)
	draw->render->set_view_index(draw->render, draw->pt.user.viewid);

	/* Must do this after set_primitive() above:
	*/
	emit->vinfo = vinfo = draw->render->get_vertex_info(draw->render);

	/* Translate from pipeline vertices to hw vertices.
	*/
	unsigned dst_offset = 0;
	for (unsigned i = 0; i < vinfo->num_attribs; i++) {
	unsigned emit_sz = 0;
	unsigned src_buffer = 0;
	unsigned output_format;
	unsigned src_offset = vinfo->attrib[i].src_index * 4 * sizeof(float);

	output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
	emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);

	/* doesn't handle EMIT_OMIT */
	assert(emit_sz != 0);

	if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
	src_buffer = 1;
	src_offset = 0;
	} else if (vinfo->attrib[i].src_index == DRAW_ATTR_NONEXIST) {
	/* elements which don't exist will get assigned zeros */
	src_buffer = 2;
	src_offset = 0;
	}

	hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
	hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
	hw_key.element[i].input_buffer = src_buffer;
	hw_key.element[i].input_offset = src_offset;
	hw_key.element[i].instance_divisor = 0;
	hw_key.element[i].output_format = output_format;
	hw_key.element[i].output_offset = dst_offset;

	dst_offset += emit_sz;
	}

	hw_key.nr_elements = vinfo->num_attribs;
	hw_key.output_stride = vinfo->size * 4;

	if (!emit->translate \|\|
	translate_key_compare(&emit->translate->key, &hw_key) != 0) {
	translate_key_sanitize(&hw_key);
	emit->translate = translate_cache_find(emit->cache, &hw_key);

	emit->translate->set_buffer(emit->translate, 2, &emit->zero4[0], 0, ~0);
	}

	if (!vinfo->size)
	*max_vertices = 0;
	else
	*max_vertices = (draw->render->max_vertex_buffer_bytes /
	(vinfo->size * 4));
	}


	void
	draw_pt_emit(struct pt_emit *emit,
	const struct draw_vertex_info *vert_info,
	const struct draw_prim_info *prim_info)
	{
	const float (vertex_data)[4] = (const float ()[4])vert_info->verts->data;
	unsigned vertex_count = vert_info->count;
	unsigned stride = vert_info->stride;
	const ushort *elts = prim_info->elts;
	struct draw_context *draw = emit->draw;
	struct translate *translate = emit->translate;
	struct vbuf_render *render = draw->render;
	unsigned start, i;
	void *hw_verts;

	/* XXX: need to flush to get prim_vbuf.c to release its allocation??
	*/
	draw_do_flush(draw, DRAW_FLUSH_BACKEND);

	if (vertex_count == 0)
	return;

	/* XXX: and work out some way to coordinate the render primitive
	* between vbuf.c and here...
	*/
	render->set_primitive(draw->render, prim_info->prim);
	if (draw->render->set_view_index)
	draw->render->set_view_index(draw->render, draw->pt.user.viewid);

	assert(vertex_count <= 65535);
	render->allocate_vertices(render,
	(ushort)translate->key.output_stride,
	(ushort)vertex_count);

	hw_verts = render->map_vertices(render);
	if (!hw_verts) {
	debug_warn_once("map of vertex buffer failed (out of memory?)");
	return;
	}

	translate->set_buffer(translate,
	0,
	vertex_data,
	stride,
	~0);

	translate->set_buffer(translate,
	1,
	&draw->rasterizer->point_size,
	0,
	~0);

	/* fetch/translate vertex attribs to fill hw_verts[] */
	translate->run(translate,
	0,
	vertex_count,
	0,
	0,
	hw_verts);

	render->unmap_vertices(render, 0, vertex_count - 1);

	for (start = i = 0;
	i < prim_info->primitive_count;
	start += prim_info->primitive_lengths[i], i++) {
	render->draw_elements(render,
	elts + start,
	prim_info->primitive_lengths[i]);
	}

	render->release_vertices(render);
	}


	void
	draw_pt_emit_linear(struct pt_emit *emit,
	const struct draw_vertex_info *vert_info,
	const struct draw_prim_info *prim_info)
	{
	const float (vertex_data)[4] = (const float ()[4])vert_info->verts->data;
	unsigned stride = vert_info->stride;
	unsigned count = vert_info->count;
	struct draw_context *draw = emit->draw;
	struct translate *translate = emit->translate;
	struct vbuf_render *render = draw->render;
	void *hw_verts;
	unsigned start, i;

	#if 0
	debug_printf("Linear emit\n");
	#endif
	/* XXX: need to flush to get prim_vbuf.c to release its allocation??
	*/
	draw_do_flush(draw, DRAW_FLUSH_BACKEND);

	/* XXX: and work out some way to coordinate the render primitive
	* between vbuf.c and here...
	*/
	render->set_primitive(draw->render, prim_info->prim);
	if (draw->render->set_view_index)
	draw->render->set_view_index(draw->render, draw->pt.user.viewid);

	assert(count <= 65535);
	if (!render->allocate_vertices(render,
	(ushort)translate->key.output_stride,
	(ushort)count))
	goto fail;

	hw_verts = render->map_vertices(render);
	if (!hw_verts)
	goto fail;

	translate->set_buffer(translate, 0,
	vertex_data, stride, count - 1);

	translate->set_buffer(translate, 1,
	&draw->rasterizer->point_size,
	0, ~0);

	translate->run(translate,
	0,
	count,
	0,
	0,
	hw_verts);

	if (0) {
	for (unsigned i = 0; i < count; i++) {
	debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
	draw_dump_emitted_vertex(emit->vinfo,
	(const uint8_t *)hw_verts +
	translate->key.output_stride * i);
	}
	}

	render->unmap_vertices(render, 0, count - 1);

	for (start = i = 0;
	i < prim_info->primitive_count;
	start += prim_info->primitive_lengths[i], i++) {
	render->draw_arrays(render,
	start,
	prim_info->primitive_lengths[i]);
	}

	render->release_vertices(render);

	return;

	fail:
	debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
	return;
	}


	struct pt_emit *
	draw_pt_emit_create(struct draw_context *draw)
	{
	struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
	if (!emit)
	return NULL;

	emit->draw = draw;
	emit->cache = translate_cache_create();
	if (!emit->cache) {
	FREE(emit);
	return NULL;
	}

	emit->zero4[0] = emit->zero4[1] = emit->zero4[2] = emit->zero4[3] = 0.0f;

	return emit;
	}


	void
	draw_pt_emit_destroy(struct pt_emit *emit)
	{
	if (emit->cache)
	translate_cache_destroy(emit->cache);

	FREE(emit);
	}