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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28. #include "main/imports.h"
  29. #include "main/image.h"
  30. #include "main/macros.h"
  31.  
  32. #include "vbo/vbo.h"
  33.  
  34. #include "st_context.h"
  35. #include "st_atom.h"
  36. #include "st_cb_bufferobjects.h"
  37. #include "st_draw.h"
  38. #include "st_program.h"
  39.  
  40. #include "pipe/p_context.h"
  41. #include "pipe/p_defines.h"
  42. #include "util/u_inlines.h"
  43. #include "util/u_draw.h"
  44.  
  45. #include "draw/draw_private.h"
  46. #include "draw/draw_context.h"
  47.  
  48.  
  49. /**
  50.  * Set the (private) draw module's post-transformed vertex format when in
  51.  * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
  52.  */
  53. static void
  54. set_feedback_vertex_format(struct gl_context *ctx)
  55. {
  56. #if 0
  57.    struct st_context *st = st_context(ctx);
  58.    struct vertex_info vinfo;
  59.    GLuint i;
  60.  
  61.    memset(&vinfo, 0, sizeof(vinfo));
  62.  
  63.    if (ctx->RenderMode == GL_SELECT) {
  64.       assert(ctx->RenderMode == GL_SELECT);
  65.       vinfo.num_attribs = 1;
  66.       vinfo.format[0] = FORMAT_4F;
  67.       vinfo.interp_mode[0] = INTERP_LINEAR;
  68.    }
  69.    else {
  70.       /* GL_FEEDBACK, or glRasterPos */
  71.       /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
  72.       vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
  73.       for (i = 0; i < vinfo.num_attribs; i++) {
  74.          vinfo.format[i] = FORMAT_4F;
  75.          vinfo.interp_mode[i] = INTERP_LINEAR;
  76.       }
  77.    }
  78.  
  79.    draw_set_vertex_info(st->draw, &vinfo);
  80. #endif
  81. }
  82.  
  83.  
  84. /**
  85.  * Helper for drawing current vertex arrays.
  86.  */
  87. static void
  88. draw_arrays(struct draw_context *draw, unsigned mode,
  89.             unsigned start, unsigned count)
  90. {
  91.    struct pipe_draw_info info;
  92.  
  93.    util_draw_init_info(&info);
  94.  
  95.    info.mode = mode;
  96.    info.start = start;
  97.    info.count = count;
  98.    info.min_index = start;
  99.    info.max_index = start + count - 1;
  100.  
  101.    draw_vbo(draw, &info);
  102. }
  103.  
  104.  
  105. /**
  106.  * Called by VBO to draw arrays when in selection or feedback mode and
  107.  * to implement glRasterPos.
  108.  * This is very much like the normal draw_vbo() function above.
  109.  * Look at code refactoring some day.
  110.  */
  111. void
  112. st_feedback_draw_vbo(struct gl_context *ctx,
  113.                      const struct _mesa_prim *prims,
  114.                      GLuint nr_prims,
  115.                      const struct _mesa_index_buffer *ib,
  116.                      GLboolean index_bounds_valid,
  117.                      GLuint min_index,
  118.                      GLuint max_index,
  119.                      struct gl_transform_feedback_object *tfb_vertcount)
  120. {
  121.    struct st_context *st = st_context(ctx);
  122.    struct pipe_context *pipe = st->pipe;
  123.    struct draw_context *draw = st->draw;
  124.    const struct st_vertex_program *vp;
  125.    const struct pipe_shader_state *vs;
  126.    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
  127.    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
  128.    struct pipe_index_buffer ibuffer;
  129.    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
  130.    struct pipe_transfer *ib_transfer = NULL;
  131.    const struct gl_client_array **arrays = ctx->Array._DrawArrays;
  132.    GLuint attr, i;
  133.    const GLubyte *low_addr = NULL;
  134.    const void *mapped_indices = NULL;
  135.  
  136.    assert(draw);
  137.  
  138.    st_validate_state(st);
  139.  
  140.    if (!index_bounds_valid)
  141.       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
  142.  
  143.    /* must get these after state validation! */
  144.    vp = st->vp;
  145.    vs = &st->vp_variant->tgsi;
  146.  
  147.    if (!st->vp_variant->draw_shader) {
  148.       st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
  149.    }
  150.  
  151.    /*
  152.     * Set up the draw module's state.
  153.     *
  154.     * We'd like to do this less frequently, but the normal state-update
  155.     * code sends state updates to the pipe, not to our private draw module.
  156.     */
  157.    assert(draw);
  158.    draw_set_viewport_states(draw, 0, 1, &st->state.viewport);
  159.    draw_set_clip_state(draw, &st->state.clip);
  160.    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
  161.    draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
  162.    set_feedback_vertex_format(ctx);
  163.  
  164.    /* Find the lowest address of the arrays we're drawing */
  165.    if (vp->num_inputs) {
  166.       low_addr = arrays[vp->index_to_input[0]]->Ptr;
  167.  
  168.       for (attr = 1; attr < vp->num_inputs; attr++) {
  169.          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
  170.          low_addr = MIN2(low_addr, start);
  171.       }
  172.    }
  173.  
  174.    /* loop over TGSI shader inputs to determine vertex buffer
  175.     * and attribute info
  176.     */
  177.    for (attr = 0; attr < vp->num_inputs; attr++) {
  178.       const GLuint mesaAttr = vp->index_to_input[attr];
  179.       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
  180.       void *map;
  181.  
  182.       if (bufobj && bufobj->Name) {
  183.          /* Attribute data is in a VBO.
  184.           * Recall that for VBOs, the gl_client_array->Ptr field is
  185.           * really an offset from the start of the VBO, not a pointer.
  186.           */
  187.          struct st_buffer_object *stobj = st_buffer_object(bufobj);
  188.          assert(stobj->buffer);
  189.  
  190.          vbuffers[attr].buffer = NULL;
  191.          vbuffers[attr].user_buffer = NULL;
  192.          pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
  193.          vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
  194.          velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
  195.  
  196.          /* map the attrib buffer */
  197.          map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
  198.                                PIPE_TRANSFER_READ,
  199.                                &vb_transfer[attr]);
  200.          draw_set_mapped_vertex_buffer(draw, attr, map,
  201.                                        vbuffers[attr].buffer->width0);
  202.       }
  203.       else {
  204.          vbuffers[attr].buffer = NULL;
  205.          vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
  206.          vbuffers[attr].buffer_offset = 0;
  207.          velements[attr].src_offset = 0;
  208.  
  209.          draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer,
  210.                                        ~0);
  211.       }
  212.  
  213.       /* common-case setup */
  214.       vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
  215.       velements[attr].instance_divisor = 0;
  216.       velements[attr].vertex_buffer_index = attr;
  217.       velements[attr].src_format =
  218.          st_pipe_vertex_format(arrays[mesaAttr]->Type,
  219.                                arrays[mesaAttr]->Size,
  220.                                arrays[mesaAttr]->Format,
  221.                                arrays[mesaAttr]->Normalized,
  222.                                arrays[mesaAttr]->Integer);
  223.       assert(velements[attr].src_format);
  224.  
  225.       /* tell draw about this attribute */
  226. #if 0
  227.       draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
  228. #endif
  229.    }
  230.  
  231.    draw_set_vertex_buffers(draw, 0, vp->num_inputs, vbuffers);
  232.    draw_set_vertex_elements(draw, vp->num_inputs, velements);
  233.  
  234.    memset(&ibuffer, 0, sizeof(ibuffer));
  235.    if (ib) {
  236.       struct gl_buffer_object *bufobj = ib->obj;
  237.  
  238.       ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
  239.       if (ibuffer.index_size == 0)
  240.          goto out_unref_vertex;
  241.  
  242.       if (bufobj && bufobj->Name) {
  243.          struct st_buffer_object *stobj = st_buffer_object(bufobj);
  244.  
  245.          pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
  246.          ibuffer.offset = pointer_to_offset(ib->ptr);
  247.  
  248.          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
  249.                                           PIPE_TRANSFER_READ, &ib_transfer);
  250.       }
  251.       else {
  252.          /* skip setting ibuffer.buffer as the draw module does not use it */
  253.          mapped_indices = ib->ptr;
  254.       }
  255.  
  256.       draw_set_indexes(draw,
  257.                        (ubyte *) mapped_indices + ibuffer.offset,
  258.                        ibuffer.index_size, ~0);
  259.    }
  260.  
  261.    /* set the constant buffer */
  262.    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
  263.                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
  264.                                    st->state.constants[PIPE_SHADER_VERTEX].size);
  265.  
  266.  
  267.    /* draw here */
  268.    for (i = 0; i < nr_prims; i++) {
  269.       draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
  270.    }
  271.  
  272.  
  273.    /*
  274.     * unmap vertex/index buffers
  275.     */
  276.    if (ib) {
  277.       draw_set_indexes(draw, NULL, 0, 0);
  278.       if (ib_transfer)
  279.          pipe_buffer_unmap(pipe, ib_transfer);
  280.       pipe_resource_reference(&ibuffer.buffer, NULL);
  281.    }
  282.  
  283.  out_unref_vertex:
  284.    for (attr = 0; attr < vp->num_inputs; attr++) {
  285.       if (vb_transfer[attr])
  286.          pipe_buffer_unmap(pipe, vb_transfer[attr]);
  287.       draw_set_mapped_vertex_buffer(draw, attr, NULL, 0);
  288.       pipe_resource_reference(&vbuffers[attr].buffer, NULL);
  289.    }
  290.    draw_set_vertex_buffers(draw, 0, vp->num_inputs, NULL);
  291. }
  292.