/************************************************************************** * * 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 */ #include "main/imports.h" #include "vbo/vbo.h" #include "tnl/t_context.h" #include "tnl/t_pipeline.h" #include "tnl/t_vp_build.h" /* USE_NEW_DRAW */ #include "st_context.h" #include "st_atom.h" #include "st_draw.h" #include "st_cb_bufferobjects.h" #include "pipe/p_context.h" #include "pipe/p_defines.h" #include "pipe/p_winsys.h" #include "vbo/vbo_context.h" /* * Enabling this causes the VBO module to call draw_vbo() below, * bypassing the T&L module. This only works with VBO-based demos, * such as progs/test/bufferobj.c */ #define USE_NEW_DRAW 01 /* * TNL stage which feeds into the above. * * XXX: this needs to go into each driver using this code, because we * cannot make the leap from ctx->draw_context in this file. The * driver needs to customize tnl anyway, so this isn't a big deal. */ static GLboolean draw( GLcontext * ctx, struct tnl_pipeline_stage *stage ) { struct st_context *st = st_context(ctx); struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; /* Validate driver and pipe state: */ st_validate_state( st ); /* Call into the new draw code to handle the VB: */ st->pipe->draw_vb( st->pipe, VB ); /* Finished */ return GL_FALSE; } const struct tnl_pipeline_stage st_draw = { "check state and draw", NULL, NULL, NULL, NULL, draw }; static const struct tnl_pipeline_stage *st_pipeline[] = { #if USE_NEW_DRAW &_tnl_vertex_program_stage, #else &_tnl_vertex_transform_stage, &_tnl_vertex_cull_stage, &_tnl_normal_transform_stage, &_tnl_lighting_stage, &_tnl_fog_coordinate_stage, &_tnl_texgen_stage, &_tnl_texture_transform_stage, &_tnl_point_attenuation_stage, &_tnl_vertex_program_stage, #endif &st_draw, /* ADD: escape to pipe */ 0, }; static GLuint pipe_vertex_format(GLenum format, GLuint size) { static const GLuint float_fmts[4] = { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, }; assert(format >= GL_BYTE); assert(format <= GL_DOUBLE); assert(size >= 1); assert(size <= 4); switch (format) { case GL_FLOAT: return float_fmts[size - 1]; default: assert(0); } } /** * The default attribute buffer is basically a copy of the * ctx->Current.Attrib[] array. It's used when the vertex program * references an attribute for which we don't have a VBO/array. */ static void create_default_attribs_buffer(struct st_context *st) { struct pipe_context *pipe = st->pipe; st->default_attrib_buffer = pipe->winsys->buffer_create( pipe->winsys, 32 ); } static void destroy_default_attribs_buffer(struct st_context *st) { struct pipe_context *pipe = st->pipe; pipe->winsys->buffer_unreference(pipe->winsys, &st->default_attrib_buffer); } static void update_default_attribs_buffer(GLcontext *ctx) { struct pipe_context *pipe = ctx->st->pipe; struct pipe_buffer_handle *buf = ctx->st->default_attrib_buffer; const unsigned size = sizeof(ctx->Current.Attrib); const void *data = ctx->Current.Attrib; pipe->winsys->buffer_data(pipe->winsys, buf, size, data); } /** * This function gets plugged into the VBO module and is called when * we have something to render. * Basically, translate the information into the format expected by pipe. */ static void draw_vbo(GLcontext *ctx, const struct gl_client_array **arrays, const struct _mesa_prim *prims, GLuint nr_prims, const struct _mesa_index_buffer *ib, GLuint min_index, GLuint max_index) { struct pipe_context *pipe = ctx->st->pipe; GLuint attr, i; GLbitfield attrsNeeded; const unsigned attr0_offset = (unsigned) arrays[0]->Ptr; st_validate_state(ctx->st); update_default_attribs_buffer(ctx); /* this must be after state validation */ attrsNeeded = ctx->st->state.vs.inputs_read; /* tell pipe about the vertex array element/attributes */ for (attr = 0; attr < 16; attr++) { struct pipe_vertex_buffer vbuffer; struct pipe_vertex_element velement; vbuffer.buffer = NULL; vbuffer.pitch = 0; velement.src_offset = 0; velement.vertex_buffer_index = 0; velement.src_format = 0; if (attrsNeeded & (1 << attr)) { struct gl_buffer_object *bufobj = arrays[attr]->BufferObj; if (bufobj && bufobj->Name) { struct st_buffer_object *stobj = st_buffer_object(bufobj); /* Recall that for VBOs, the gl_client_array->Ptr field is * really an offset from the start of the VBO, not a pointer. */ unsigned offset = (unsigned) arrays[attr]->Ptr; assert(stobj->buffer); vbuffer.buffer = stobj->buffer; vbuffer.buffer_offset = attr0_offset; /* in bytes */ vbuffer.pitch = arrays[attr]->StrideB; /* in bytes */ vbuffer.max_index = 0; /* need this? */ velement.src_offset = offset - attr0_offset; /* bytes */ velement.vertex_buffer_index = attr; velement.dst_offset = 0; /* need this? */ velement.src_format = pipe_vertex_format(arrays[attr]->Type, arrays[attr]->Size); assert(velement.src_format); } else { /* use the default attribute buffer */ vbuffer.buffer = ctx->st->default_attrib_buffer; vbuffer.buffer_offset = 0; vbuffer.pitch = 0; /* must be zero! */ vbuffer.max_index = 1; velement.src_offset = attr * 4 * sizeof(GLfloat); velement.vertex_buffer_index = attr; velement.dst_offset = 0; velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; } } if (attr == 0) assert(vbuffer.buffer); pipe->set_vertex_buffer(pipe, attr, &vbuffer); pipe->set_vertex_element(pipe, attr, &velement); } /* do actual drawing */ for (i = 0; i < nr_prims; i++) { pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count); } } /* This is all a hack to keep using tnl until we have vertex programs * up and running. */ void st_init_draw( struct st_context *st ) { GLcontext *ctx = st->ctx; #if USE_NEW_DRAW struct vbo_context *vbo = (struct vbo_context *) ctx->swtnl_im; create_default_attribs_buffer(st); assert(vbo); assert(vbo->draw_prims); vbo->draw_prims = draw_vbo; #endif _tnl_destroy_pipeline( ctx ); _tnl_install_pipeline( ctx, st_pipeline ); /* USE_NEW_DRAW */ _tnl_ProgramCacheInit( ctx ); } void st_destroy_draw( struct st_context *st ) { destroy_default_attribs_buffer(st); }