home *** CD-ROM | disk | FTP | other *** search
- /* $Id: t_array_api.c,v 1.28 2002/10/24 23:57:25 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 4.1
- *
- * Copyright (C) 1999-2002 Brian Paul 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, sublicense,
- * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL 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.
- */
-
- /**
- * \file vpexec.c
- * \brief Vertex array API functions (glDrawArrays, etc)
- * \author Keith Whitwell
- */
-
- #include "glheader.h"
- #include "api_validate.h"
- #include "context.h"
- #include "imports.h"
- #include "macros.h"
- #include "mmath.h"
- #include "mtypes.h"
- #include "state.h"
-
- #include "array_cache/acache.h"
-
- #include "t_array_api.h"
- #include "t_array_import.h"
- #include "t_imm_api.h"
- #include "t_imm_exec.h"
- #include "t_context.h"
- #include "t_pipeline.h"
-
- static void fallback_drawarrays( GLcontext *ctx, GLenum mode, GLint start,
- GLsizei count )
- {
- if (_tnl_hard_begin( ctx, mode )) {
- GLint i;
- for (i = start; i < count; i++)
- glArrayElement( i );
- glEnd();
- }
- }
-
-
- static void fallback_drawelements( GLcontext *ctx, GLenum mode, GLsizei count,
- const GLuint *indices)
- {
- if (_tnl_hard_begin(ctx, mode)) {
- GLint i;
- for (i = 0 ; i < count ; i++)
- glArrayElement( indices[i] );
- glEnd();
- }
- }
-
-
- static void _tnl_draw_range_elements( GLcontext *ctx, GLenum mode,
- GLuint start, GLuint end,
- GLsizei count, const GLuint *indices )
-
- {
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- FLUSH_CURRENT( ctx, 0 );
-
- /* _mesa_debug(ctx, "%s\n", __FUNCTION__); */
- if (tnl->pipeline.build_state_changes)
- _tnl_validate_pipeline( ctx );
-
- _tnl_vb_bind_arrays( ctx, start, end );
-
- tnl->vb.FirstPrimitive = 0;
- tnl->vb.Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
- tnl->vb.PrimitiveLength[0] = count;
- tnl->vb.Elts = (GLuint *)indices;
-
- if (ctx->Array.LockCount)
- tnl->Driver.RunPipeline( ctx );
- else {
- /* Note that arrays may have changed before/after execution.
- */
- tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
- tnl->Driver.RunPipeline( ctx );
- tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
- }
- }
-
-
-
- /**
- * Called via the GL API dispatcher.
- */
- void
- _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
- {
- GET_CURRENT_CONTEXT(ctx);
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_buffer *VB = &tnl->vb;
- GLuint thresh = (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) ? 30 : 10;
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(NULL, "_tnl_DrawArrays %d %d\n", start, count);
-
- /* Check arguments, etc.
- */
- if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
- return;
-
- if (tnl->pipeline.build_state_changes)
- _tnl_validate_pipeline( ctx );
-
- if (ctx->CompileFlag) {
- fallback_drawarrays( ctx, mode, start, start + count );
- }
- else if (!ctx->Array.LockCount && (GLuint) count < thresh) {
- /* Small primitives: attempt to share a vb (at the expense of
- * using the immediate interface).
- */
- fallback_drawarrays( ctx, mode, start, start + count );
- }
- else if (ctx->Array.LockCount &&
- count < (GLint) ctx->Const.MaxArrayLockSize) {
-
- /* Locked primitives which can fit in a single vertex buffer:
- */
- FLUSH_CURRENT( ctx, 0 );
-
- if (start < (GLint) ctx->Array.LockFirst)
- start = ctx->Array.LockFirst;
- if (start + count > (GLint) ctx->Array.LockCount)
- count = ctx->Array.LockCount - start;
-
- /* Locked drawarrays. Reuse any previously transformed data.
- */
- _tnl_vb_bind_arrays( ctx, ctx->Array.LockFirst, ctx->Array.LockCount );
- VB->FirstPrimitive = start;
- VB->Primitive[start] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
- VB->PrimitiveLength[start] = count;
- tnl->Driver.RunPipeline( ctx );
- }
- else {
- int bufsz = 256; /* Use a small buffer for cache goodness */
- int j, nr;
- int minimum, modulo, skip;
-
- /* Large primitives requiring decomposition to multiple vertex
- * buffers:
- */
- switch (mode) {
- case GL_POINTS:
- minimum = 0;
- modulo = 1;
- skip = 0;
- case GL_LINES:
- minimum = 1;
- modulo = 2;
- skip = 1;
- case GL_LINE_STRIP:
- minimum = 1;
- modulo = 1;
- skip = 0;
- break;
- case GL_TRIANGLES:
- minimum = 2;
- modulo = 3;
- skip = 2;
- break;
- case GL_TRIANGLE_STRIP:
- minimum = 2;
- modulo = 1;
- skip = 0;
- break;
- case GL_QUADS:
- minimum = 3;
- modulo = 4;
- skip = 3;
- break;
- case GL_QUAD_STRIP:
- minimum = 3;
- modulo = 2;
- skip = 0;
- break;
- case GL_LINE_LOOP:
- case GL_TRIANGLE_FAN:
- case GL_POLYGON:
- default:
- /* Primitives requiring a copied vertex (fan-like primitives)
- * must use the slow path if they cannot fit in a single
- * vertex buffer.
- */
- if (count < (GLint) ctx->Const.MaxArrayLockSize) {
- bufsz = ctx->Const.MaxArrayLockSize;
- minimum = 0;
- modulo = 1;
- skip = 0;
- }
- else {
- fallback_drawarrays( ctx, mode, start, start + count );
- return;
- }
- }
-
- FLUSH_CURRENT( ctx, 0 );
-
- bufsz -= bufsz % modulo;
- bufsz -= minimum;
- count += start;
-
- for (j = start + minimum ; j < count ; j += nr + skip ) {
-
- nr = MIN2( bufsz, count - j );
-
- _tnl_vb_bind_arrays( ctx, j - minimum, j + nr );
-
- VB->FirstPrimitive = 0;
- VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
- VB->PrimitiveLength[0] = nr + minimum;
- tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
- tnl->Driver.RunPipeline( ctx );
- tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
- }
- }
- }
-
-
- /**
- * Called via the GL API dispatcher.
- */
- void
- _tnl_DrawRangeElements(GLenum mode,
- GLuint start, GLuint end,
- GLsizei count, GLenum type, const GLvoid *indices)
- {
- GET_CURRENT_CONTEXT(ctx);
- GLuint *ui_indices;
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(NULL, "_tnl_DrawRangeElements %d %d %d\n", start, end, count);
-
- /* Check arguments, etc.
- */
- if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
- type, indices ))
- return;
-
- ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
- count, type, indices );
-
-
- if (ctx->CompileFlag) {
- /* Can't do anything when compiling:
- */
- fallback_drawelements( ctx, mode, count, ui_indices );
- }
- else if (ctx->Array.LockCount) {
- /* Are the arrays already locked? If so we currently have to look
- * at the whole locked range.
- */
- if (start >= ctx->Array.LockFirst && end <= ctx->Array.LockCount)
- _tnl_draw_range_elements( ctx, mode,
- ctx->Array.LockFirst,
- ctx->Array.LockCount,
- count, ui_indices );
- else {
- /* The spec says referencing elements outside the locked
- * range is undefined. I'm going to make it a noop this time
- * round, maybe come up with something beter before 3.6.
- *
- * May be able to get away with just setting LockCount==0,
- * though this raises the problems of dependent state. May
- * have to call glUnlockArrays() directly?
- *
- * Or scan the list and replace bad indices?
- */
- _mesa_problem( ctx,
- "DrawRangeElements references "
- "elements outside locked range.");
- }
- }
- else if (end + 1 - start < ctx->Const.MaxArrayLockSize) {
- /* The arrays aren't locked but we can still fit them inside a
- * single vertexbuffer.
- */
- _tnl_draw_range_elements( ctx, mode, start, end + 1, count, ui_indices );
- } else {
- /* Range is too big to optimize:
- */
- fallback_drawelements( ctx, mode, count, ui_indices );
- }
- }
-
-
-
- /**
- * Called via the GL API dispatcher.
- */
- void
- _tnl_DrawElements(GLenum mode, GLsizei count, GLenum type,
- const GLvoid *indices)
- {
- GET_CURRENT_CONTEXT(ctx);
- GLuint *ui_indices;
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(NULL, "_tnl_DrawElements %d\n", count);
-
- /* Check arguments, etc.
- */
- if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
- return;
-
- ui_indices = (GLuint *)_ac_import_elements( ctx, GL_UNSIGNED_INT,
- count, type, indices );
-
- if (ctx->CompileFlag) {
- /* Can't do anything when compiling:
- */
- fallback_drawelements( ctx, mode, count, ui_indices );
- }
- else if (ctx->Array.LockCount) {
- _tnl_draw_range_elements( ctx, mode,
- ctx->Array.LockFirst,
- ctx->Array.LockCount,
- count, ui_indices );
- }
- else {
- /* Scan the index list and see if we can use the locked path anyway.
- */
- GLuint max_elt = 0;
- GLint i;
-
- for (i = 0 ; i < count ; i++)
- if (ui_indices[i] > max_elt)
- max_elt = ui_indices[i];
-
- if (max_elt < ctx->Const.MaxArrayLockSize && /* can we use it? */
- max_elt < (GLuint) count) /* do we want to use it? */
- _tnl_draw_range_elements( ctx, mode, 0, max_elt+1, count, ui_indices );
- else
- fallback_drawelements( ctx, mode, count, ui_indices );
- }
- }
-
-
- /**
- * Initialize context's vertex array fields. Called during T 'n L context
- * creation.
- */
- void _tnl_array_init( GLcontext *ctx )
- {
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_arrays *tmp = &tnl->array_inputs;
- GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt);
- GLuint i;
-
- vfmt->DrawArrays = _tnl_DrawArrays;
- vfmt->DrawElements = _tnl_DrawElements;
- vfmt->DrawRangeElements = _tnl_DrawRangeElements;
-
- /* Setup vector pointers that will be used to bind arrays to VB's.
- */
- _mesa_vector4f_init( &tmp->Obj, 0, 0 );
- _mesa_vector4f_init( &tmp->Normal, 0, 0 );
- _mesa_vector4f_init( &tmp->FogCoord, 0, 0 );
- _mesa_vector1ui_init( &tmp->Index, 0, 0 );
- _mesa_vector1ub_init( &tmp->EdgeFlag, 0, 0 );
-
- for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
- _mesa_vector4f_init( &tmp->TexCoord[i], 0, 0);
-
- tnl->tmp_primitive = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
- tnl->tmp_primitive_length = (GLuint *)MALLOC(sizeof(GLuint)*tnl->vb.Size);
- }
-
-
- /**
- * Destroy the context's vertex array stuff.
- * Called during T 'n L context destruction.
- */
- void _tnl_array_destroy( GLcontext *ctx )
- {
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- if (tnl->tmp_primitive_length) FREE(tnl->tmp_primitive_length);
- if (tnl->tmp_primitive) FREE(tnl->tmp_primitive);
- }
-