src/mesa/state_tracker/st_draw_feedback.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * 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.
  *
  **************************************************************************/

 #include "main/imports.h"
 #include "main/image.h"
 #include "main/macros.h"
 #include "main/mfeatures.h"

 #include "vbo/vbo.h"

 #include "st_context.h"
 #include "st_atom.h"
 #include "st_cb_bufferobjects.h"
 #include "st_draw.h"
 #include "st_program.h"

 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "util/u_inlines.h"

 #include "draw/draw_private.h"
 #include "draw/draw_context.h"


 #if FEATURE_feedback || FEATURE_rastpos

 /**
  * Set the (private) draw module's post-transformed vertex format when in
  * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
  */
 static void
 set_feedback_vertex_format(struct gl_context *ctx)
 {
 #if 0
    struct st_context *st = st_context(ctx);
    struct vertex_info vinfo;
    GLuint i;

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

    if (ctx->RenderMode == GL_SELECT) {
       assert(ctx->RenderMode == GL_SELECT);
       vinfo.num_attribs = 1;
       vinfo.format[0] = FORMAT_4F;
       vinfo.interp_mode[0] = INTERP_LINEAR;
    }
    else {
       /* GL_FEEDBACK, or glRasterPos */
       /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
       vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
       for (i = 0; i < vinfo.num_attribs; i++) {
          vinfo.format[i] = FORMAT_4F;
          vinfo.interp_mode[i] = INTERP_LINEAR;
       }
    }

    draw_set_vertex_info(st->draw, &vinfo);
 #endif
 }


 /**
  * Called by VBO to draw arrays when in selection or feedback mode and
  * to implement glRasterPos.
  * This is very much like the normal draw_vbo() function above.
  * Look at code refactoring some day.
  */
 void
 st_feedback_draw_vbo(struct gl_context *ctx,
                      const struct _mesa_prim *prims,
                      GLuint nr_prims,
                      const struct _mesa_index_buffer *ib,
 		     GLboolean index_bounds_valid,
                      GLuint min_index,
                      GLuint max_index,
                      struct gl_transform_feedback_object *tfb_vertcount)
 {
    struct st_context *st = st_context(ctx);
    struct pipe_context *pipe = st->pipe;
    struct draw_context *draw = st->draw;
    const struct st_vertex_program *vp;
    const struct pipe_shader_state *vs;
    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
    struct pipe_index_buffer ibuffer;
    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
    struct pipe_transfer *ib_transfer = NULL;
    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
    GLuint attr, i;
    const GLubyte *low_addr = NULL;
    const void *mapped_indices = NULL;

    assert(draw);

    st_validate_state(st);

    if (!index_bounds_valid)
       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);

    /* must get these after state validation! */
    vp = st->vp;
    vs = &st->vp_variant->tgsi;

    if (!st->vp_variant->draw_shader) {
       st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
    }

    /*
     * Set up the draw module's state.
     *
     * We'd like to do this less frequently, but the normal state-update
     * code sends state updates to the pipe, not to our private draw module.
     */
    assert(draw);
    draw_set_viewport_state(draw, &st->state.viewport);
    draw_set_clip_state(draw, &st->state.clip);
    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
    draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
    set_feedback_vertex_format(ctx);

    /* Find the lowest address of the arrays we're drawing */
    if (vp->num_inputs) {
       low_addr = arrays[vp->index_to_input[0]]->Ptr;

       for (attr = 1; attr < vp->num_inputs; attr++) {
          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
          low_addr = MIN2(low_addr, start);
       }
    }

    /* loop over TGSI shader inputs to determine vertex buffer
     * and attribute info
     */
    for (attr = 0; attr < vp->num_inputs; attr++) {
       const GLuint mesaAttr = vp->index_to_input[attr];
       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
       void *map;

       if (bufobj && bufobj->Name) {
          /* Attribute data is in a VBO.
           * Recall that for VBOs, the gl_client_array->Ptr field is
           * really an offset from the start of the VBO, not a pointer.
           */
          struct st_buffer_object *stobj = st_buffer_object(bufobj);
          assert(stobj->buffer);

          vbuffers[attr].buffer = NULL;
          vbuffers[attr].user_buffer = NULL;
          pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
          vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
          velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;

          /* map the attrib buffer */
          map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
                                PIPE_TRANSFER_READ,
                                &vb_transfer[attr]);
          draw_set_mapped_vertex_buffer(draw, attr, map);
       }
       else {
          vbuffers[attr].buffer = NULL;
          vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
          vbuffers[attr].buffer_offset = 0;
          velements[attr].src_offset = 0;

          draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer);
       }

       /* common-case setup */
       vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
       velements[attr].instance_divisor = 0;
       velements[attr].vertex_buffer_index = attr;
       velements[attr].src_format =
          st_pipe_vertex_format(arrays[mesaAttr]->Type,
                                arrays[mesaAttr]->Size,
                                arrays[mesaAttr]->Format,
                                arrays[mesaAttr]->Normalized,
                                arrays[mesaAttr]->Integer);
       assert(velements[attr].src_format);

       /* tell draw about this attribute */
 #if 0
       draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
 #endif
    }

    draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
    draw_set_vertex_elements(draw, vp->num_inputs, velements);

    memset(&ibuffer, 0, sizeof(ibuffer));
    if (ib) {
       struct gl_buffer_object *bufobj = ib->obj;

       ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
       if (ibuffer.index_size == 0)
          goto out_unref_vertex;

       if (bufobj && bufobj->Name) {
          struct st_buffer_object *stobj = st_buffer_object(bufobj);

          pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
          ibuffer.offset = pointer_to_offset(ib->ptr);

          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
                                           PIPE_TRANSFER_READ, &ib_transfer);
       }
       else {
          /* skip setting ibuffer.buffer as the draw module does not use it */
          mapped_indices = ib->ptr;
       }

       draw_set_indexes(draw,
                        (ubyte *) mapped_indices + ibuffer.offset,
                        ibuffer.index_size);
    }

    /* set the constant buffer */
    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
                                    st->state.constants[PIPE_SHADER_VERTEX].size);


    /* draw here */
    for (i = 0; i < nr_prims; i++) {
       draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
    }


    /*
     * unmap vertex/index buffers
     */
    if (ib) {
       draw_set_indexes(draw, NULL, 0);
       if (ib_transfer)
          pipe_buffer_unmap(pipe, ib_transfer);
       pipe_resource_reference(&ibuffer.buffer, NULL);
    }

  out_unref_vertex:
    for (attr = 0; attr < vp->num_inputs; attr++) {
       if (vb_transfer[attr])
          pipe_buffer_unmap(pipe, vb_transfer[attr]);
       draw_set_mapped_vertex_buffer(draw, attr, NULL);
       pipe_resource_reference(&vbuffers[attr].buffer, NULL);
    }
    draw_set_vertex_buffers(draw, 0, NULL);
 }

 #endif /* FEATURE_feedback || FEATURE_rastpos */
	/**************************************************************************
	*
	* 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.
	*
	**************************************************************************/

	#include "main/imports.h"
	#include "main/image.h"
	#include "main/macros.h"
	#include "main/mfeatures.h"

	#include "vbo/vbo.h"

	#include "st_context.h"
	#include "st_atom.h"
	#include "st_cb_bufferobjects.h"
	#include "st_draw.h"
	#include "st_program.h"

	#include "pipe/p_context.h"
	#include "pipe/p_defines.h"
	#include "util/u_inlines.h"

	#include "draw/draw_private.h"
	#include "draw/draw_context.h"


	#if FEATURE_feedback \|\| FEATURE_rastpos

	/**
	* Set the (private) draw module's post-transformed vertex format when in
	* GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
	*/
	static void
	set_feedback_vertex_format(struct gl_context *ctx)
	{
	#if 0
	struct st_context *st = st_context(ctx);
	struct vertex_info vinfo;
	GLuint i;

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

	if (ctx->RenderMode == GL_SELECT) {
	assert(ctx->RenderMode == GL_SELECT);
	vinfo.num_attribs = 1;
	vinfo.format[0] = FORMAT_4F;
	vinfo.interp_mode[0] = INTERP_LINEAR;
	}
	else {
	/* GL_FEEDBACK, or glRasterPos */
	/* emit all attribs (pos, color, texcoord) as GLfloat[4] */
	vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
	for (i = 0; i < vinfo.num_attribs; i++) {
	vinfo.format[i] = FORMAT_4F;
	vinfo.interp_mode[i] = INTERP_LINEAR;
	}
	}

	draw_set_vertex_info(st->draw, &vinfo);
	#endif
	}


	/**
	* Called by VBO to draw arrays when in selection or feedback mode and
	* to implement glRasterPos.
	* This is very much like the normal draw_vbo() function above.
	* Look at code refactoring some day.
	*/
	void
	st_feedback_draw_vbo(struct gl_context *ctx,
	const struct _mesa_prim *prims,
	GLuint nr_prims,
	const struct _mesa_index_buffer *ib,
	GLboolean index_bounds_valid,
	GLuint min_index,
	GLuint max_index,
	struct gl_transform_feedback_object *tfb_vertcount)
	{
	struct st_context *st = st_context(ctx);
	struct pipe_context *pipe = st->pipe;
	struct draw_context *draw = st->draw;
	const struct st_vertex_program *vp;
	const struct pipe_shader_state *vs;
	struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
	struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
	struct pipe_index_buffer ibuffer;
	struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
	struct pipe_transfer *ib_transfer = NULL;
	const struct gl_client_array **arrays = ctx->Array._DrawArrays;
	GLuint attr, i;
	const GLubyte *low_addr = NULL;
	const void *mapped_indices = NULL;

	assert(draw);

	st_validate_state(st);

	if (!index_bounds_valid)
	vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);

	/* must get these after state validation! */
	vp = st->vp;
	vs = &st->vp_variant->tgsi;

	if (!st->vp_variant->draw_shader) {
	st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
	}

	/*
	* Set up the draw module's state.
	*
	* We'd like to do this less frequently, but the normal state-update
	* code sends state updates to the pipe, not to our private draw module.
	*/
	assert(draw);
	draw_set_viewport_state(draw, &st->state.viewport);
	draw_set_clip_state(draw, &st->state.clip);
	draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
	draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
	set_feedback_vertex_format(ctx);

	/* Find the lowest address of the arrays we're drawing */
	if (vp->num_inputs) {
	low_addr = arrays[vp->index_to_input[0]]->Ptr;

	for (attr = 1; attr < vp->num_inputs; attr++) {
	const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
	low_addr = MIN2(low_addr, start);
	}
	}

	/* loop over TGSI shader inputs to determine vertex buffer
	* and attribute info
	*/
	for (attr = 0; attr < vp->num_inputs; attr++) {
	const GLuint mesaAttr = vp->index_to_input[attr];
	struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
	void *map;

	if (bufobj && bufobj->Name) {
	/* Attribute data is in a VBO.
	* Recall that for VBOs, the gl_client_array->Ptr field is
	* really an offset from the start of the VBO, not a pointer.
	*/
	struct st_buffer_object *stobj = st_buffer_object(bufobj);
	assert(stobj->buffer);

	vbuffers[attr].buffer = NULL;
	vbuffers[attr].user_buffer = NULL;
	pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
	vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
	velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;

	/* map the attrib buffer */
	map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
	PIPE_TRANSFER_READ,
	&vb_transfer[attr]);
	draw_set_mapped_vertex_buffer(draw, attr, map);
	}
	else {
	vbuffers[attr].buffer = NULL;
	vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
	vbuffers[attr].buffer_offset = 0;
	velements[attr].src_offset = 0;

	draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer);
	}

	/* common-case setup */
	vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
	velements[attr].instance_divisor = 0;
	velements[attr].vertex_buffer_index = attr;
	velements[attr].src_format =
	st_pipe_vertex_format(arrays[mesaAttr]->Type,
	arrays[mesaAttr]->Size,
	arrays[mesaAttr]->Format,
	arrays[mesaAttr]->Normalized,
	arrays[mesaAttr]->Integer);
	assert(velements[attr].src_format);

	/* tell draw about this attribute */
	#if 0
	draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
	#endif
	}

	draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
	draw_set_vertex_elements(draw, vp->num_inputs, velements);

	memset(&ibuffer, 0, sizeof(ibuffer));
	if (ib) {
	struct gl_buffer_object *bufobj = ib->obj;

	ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
	if (ibuffer.index_size == 0)
	goto out_unref_vertex;

	if (bufobj && bufobj->Name) {
	struct st_buffer_object *stobj = st_buffer_object(bufobj);

	pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
	ibuffer.offset = pointer_to_offset(ib->ptr);

	mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
	PIPE_TRANSFER_READ, &ib_transfer);
	}
	else {
	/* skip setting ibuffer.buffer as the draw module does not use it */
	mapped_indices = ib->ptr;
	}

	draw_set_indexes(draw,
	(ubyte *) mapped_indices + ibuffer.offset,
	ibuffer.index_size);
	}

	/* set the constant buffer */
	draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
	st->state.constants[PIPE_SHADER_VERTEX].ptr,
	st->state.constants[PIPE_SHADER_VERTEX].size);


	/* draw here */
	for (i = 0; i < nr_prims; i++) {
	draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
	}


	/*
	* unmap vertex/index buffers
	*/
	if (ib) {
	draw_set_indexes(draw, NULL, 0);
	if (ib_transfer)
	pipe_buffer_unmap(pipe, ib_transfer);
	pipe_resource_reference(&ibuffer.buffer, NULL);
	}

	out_unref_vertex:
	for (attr = 0; attr < vp->num_inputs; attr++) {
	if (vb_transfer[attr])
	pipe_buffer_unmap(pipe, vb_transfer[attr]);
	draw_set_mapped_vertex_buffer(draw, attr, NULL);
	pipe_resource_reference(&vbuffers[attr].buffer, NULL);
	}
	draw_set_vertex_buffers(draw, 0, NULL);
	}

	#endif /* FEATURE_feedback \|\| FEATURE_rastpos */