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https://github.com/reactos/reactos.git
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388 lines
12 KiB
C
388 lines
12 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.2
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*/
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#include <precomp.h>
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#if FEATURE_beginend
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static void
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vbo_exec_debug_verts( struct vbo_exec_context *exec )
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{
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GLuint count = exec->vtx.vert_count;
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GLuint i;
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printf("%s: %u vertices %d primitives, %d vertsize\n",
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__FUNCTION__,
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count,
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exec->vtx.prim_count,
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exec->vtx.vertex_size);
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for (i = 0 ; i < exec->vtx.prim_count ; i++) {
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struct _mesa_prim *prim = &exec->vtx.prim[i];
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printf(" prim %d: %s%s %d..%d %s %s\n",
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i,
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_mesa_lookup_prim_by_nr(prim->mode),
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prim->weak ? " (weak)" : "",
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prim->start,
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prim->start + prim->count,
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prim->begin ? "BEGIN" : "(wrap)",
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prim->end ? "END" : "(wrap)");
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}
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}
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/*
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* NOTE: Need to have calculated primitives by this point -- do it on the fly.
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* NOTE: Old 'parity' issue is gone.
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*/
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static GLuint
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vbo_copy_vertices( struct vbo_exec_context *exec )
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{
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GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
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GLuint ovf, i;
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GLuint sz = exec->vtx.vertex_size;
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GLfloat *dst = exec->vtx.copied.buffer;
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const GLfloat *src = (exec->vtx.buffer_map +
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exec->vtx.prim[exec->vtx.prim_count-1].start *
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exec->vtx.vertex_size);
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switch (exec->ctx->Driver.CurrentExecPrimitive) {
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case GL_POINTS:
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return 0;
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case GL_LINES:
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ovf = nr&1;
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for (i = 0 ; i < ovf ; i++)
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memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
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return i;
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case GL_TRIANGLES:
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ovf = nr%3;
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for (i = 0 ; i < ovf ; i++)
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memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
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return i;
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case GL_QUADS:
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ovf = nr&3;
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for (i = 0 ; i < ovf ; i++)
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memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
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return i;
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case GL_LINE_STRIP:
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if (nr == 0) {
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return 0;
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}
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else {
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memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
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return 1;
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}
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case GL_LINE_LOOP:
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case GL_TRIANGLE_FAN:
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case GL_POLYGON:
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if (nr == 0) {
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return 0;
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}
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else if (nr == 1) {
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memcpy( dst, src+0, sz * sizeof(GLfloat) );
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return 1;
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}
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else {
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memcpy( dst, src+0, sz * sizeof(GLfloat) );
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memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
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return 2;
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}
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case GL_TRIANGLE_STRIP:
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/* no parity issue, but need to make sure the tri is not drawn twice */
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if (nr & 1) {
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exec->vtx.prim[exec->vtx.prim_count-1].count--;
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}
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/* fallthrough */
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case GL_QUAD_STRIP:
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switch (nr) {
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case 0:
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ovf = 0;
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break;
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case 1:
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ovf = 1;
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break;
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default:
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ovf = 2 + (nr & 1);
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break;
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}
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for (i = 0 ; i < ovf ; i++)
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memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
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return i;
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case PRIM_OUTSIDE_BEGIN_END:
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return 0;
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default:
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assert(0);
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return 0;
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}
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}
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/* TODO: populate these as the vertex is defined:
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*/
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static void
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vbo_exec_bind_arrays( struct gl_context *ctx )
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{
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struct vbo_context *vbo = vbo_context(ctx);
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struct vbo_exec_context *exec = &vbo->exec;
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struct gl_client_array *arrays = exec->vtx.arrays;
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const GLuint count = exec->vtx.vert_count;
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GLuint attr;
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GLbitfield64 varying_inputs = 0x0;
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/* Install the default (ie Current) attributes first, then overlay
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* all active ones.
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*/
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for (attr = 0; attr < VBO_ATTRIB_MAX; attr++) {
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exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
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}
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/* Make all active attributes (including edgeflag) available as
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* arrays of floats.
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*/
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for (attr = 0; attr < VBO_ATTRIB_MAX ; attr++) {
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if (exec->vtx.attrsz[attr]) {
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GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[attr] -
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(GLbyte *)exec->vtx.vertex;
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/* override the default array set above */
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ASSERT(attr < Elements(exec->vtx.inputs));
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ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
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exec->vtx.inputs[attr] = &arrays[attr];
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if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
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/* a real buffer obj: Ptr is an offset, not a pointer*/
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assert(exec->vtx.bufferobj->Pointer); /* buf should be mapped */
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assert(offset >= 0);
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arrays[attr].Ptr = (GLubyte *)exec->vtx.bufferobj->Offset + offset;
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}
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else {
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/* Ptr into ordinary app memory */
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arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset;
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}
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arrays[attr].Size = exec->vtx.attrsz[attr];
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arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
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arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
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arrays[attr].Type = GL_FLOAT;
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arrays[attr].Enabled = 1;
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arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
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_mesa_reference_buffer_object(ctx,
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&arrays[attr].BufferObj,
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exec->vtx.bufferobj);
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arrays[attr]._MaxElement = count; /* ??? */
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varying_inputs |= VERT_BIT(attr);
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ctx->NewState |= _NEW_ARRAY;
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}
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}
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}
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/**
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* Unmap the VBO. This is called before drawing.
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*/
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static void
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vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
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{
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if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
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struct gl_context *ctx = exec->ctx;
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if (ctx->Driver.FlushMappedBufferRange) {
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GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
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GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
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if (length)
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ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
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exec->vtx.bufferobj);
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}
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exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
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exec->vtx.buffer_map) * sizeof(float);
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assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
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assert(exec->vtx.buffer_ptr != NULL);
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ctx->Driver.UnmapBuffer(ctx, exec->vtx.bufferobj);
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exec->vtx.buffer_map = NULL;
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exec->vtx.buffer_ptr = NULL;
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exec->vtx.max_vert = 0;
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}
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}
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/**
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* Map the vertex buffer to begin storing glVertex, glColor, etc data.
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*/
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void
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vbo_exec_vtx_map( struct vbo_exec_context *exec )
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{
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struct gl_context *ctx = exec->ctx;
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const GLenum accessRange = GL_MAP_WRITE_BIT | /* for MapBufferRange */
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GL_MAP_INVALIDATE_RANGE_BIT |
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GL_MAP_UNSYNCHRONIZED_BIT |
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GL_MAP_FLUSH_EXPLICIT_BIT |
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MESA_MAP_NOWAIT_BIT;
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const GLenum usage = GL_STREAM_DRAW_ARB;
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if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
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return;
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assert(!exec->vtx.buffer_map);
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assert(!exec->vtx.buffer_ptr);
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if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024) {
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/* The VBO exists and there's room for more */
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if (exec->vtx.bufferobj->Size > 0) {
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exec->vtx.buffer_map =
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(GLfloat *)ctx->Driver.MapBufferRange(ctx,
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exec->vtx.buffer_used,
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(VBO_VERT_BUFFER_SIZE -
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exec->vtx.buffer_used),
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accessRange,
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exec->vtx.bufferobj);
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exec->vtx.buffer_ptr = exec->vtx.buffer_map;
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}
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else {
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exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL;
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}
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}
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if (!exec->vtx.buffer_map) {
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/* Need to allocate a new VBO */
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exec->vtx.buffer_used = 0;
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if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB,
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VBO_VERT_BUFFER_SIZE,
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NULL, usage, exec->vtx.bufferobj)) {
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/* buffer allocation worked, now map the buffer */
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exec->vtx.buffer_map =
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(GLfloat *)ctx->Driver.MapBufferRange(ctx,
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0, VBO_VERT_BUFFER_SIZE,
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accessRange,
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exec->vtx.bufferobj);
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}
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else {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation");
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exec->vtx.buffer_map = NULL;
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}
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}
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exec->vtx.buffer_ptr = exec->vtx.buffer_map;
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if (!exec->vtx.buffer_map) {
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/* out of memory */
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_mesa_install_exec_vtxfmt( ctx, &exec->vtxfmt_noop );
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}
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else {
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if (_mesa_using_noop_vtxfmt(ctx->Exec)) {
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/* The no-op functions are installed so switch back to regular
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* functions. We do this test just to avoid frequent and needless
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* calls to _mesa_install_exec_vtxfmt().
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*/
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_mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt);
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}
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}
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if (0)
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printf("map %d..\n", exec->vtx.buffer_used);
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}
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/**
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* Execute the buffer and save copied verts.
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* \param keep_unmapped if true, leave the VBO unmapped when we're done.
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*/
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void
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vbo_exec_vtx_flush(struct vbo_exec_context *exec, GLboolean keepUnmapped)
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{
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if (0)
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vbo_exec_debug_verts( exec );
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if (exec->vtx.prim_count &&
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exec->vtx.vert_count) {
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exec->vtx.copied.nr = vbo_copy_vertices( exec );
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if (exec->vtx.copied.nr != exec->vtx.vert_count) {
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struct gl_context *ctx = exec->ctx;
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vbo_exec_bind_arrays( ctx );
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if (ctx->NewState)
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_mesa_update_state( ctx );
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if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
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vbo_exec_vtx_unmap( exec );
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}
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if (0)
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printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
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exec->vtx.vert_count);
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vbo_context(ctx)->draw_prims( ctx,
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exec->vtx.inputs,
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exec->vtx.prim,
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exec->vtx.prim_count,
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NULL,
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GL_TRUE,
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0,
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exec->vtx.vert_count - 1);
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/* If using a real VBO, get new storage -- unless asked not to.
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*/
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if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !keepUnmapped) {
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vbo_exec_vtx_map( exec );
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}
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}
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}
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/* May have to unmap explicitly if we didn't draw:
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*/
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if (keepUnmapped &&
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_mesa_is_bufferobj(exec->vtx.bufferobj) &&
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exec->vtx.buffer_map) {
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vbo_exec_vtx_unmap( exec );
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}
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if (keepUnmapped || exec->vtx.vertex_size == 0)
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exec->vtx.max_vert = 0;
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else
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exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
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(exec->vtx.vertex_size * sizeof(GLfloat)));
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exec->vtx.buffer_ptr = exec->vtx.buffer_map;
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exec->vtx.prim_count = 0;
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exec->vtx.vert_count = 0;
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}
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#endif /* FEATURE_beginend */
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