diff options
Diffstat (limited to 'src/mesa/vbo/vbo_save_loopback.c')
| -rw-r--r-- | src/mesa/vbo/vbo_save_loopback.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_save_loopback.c b/src/mesa/vbo/vbo_save_loopback.c new file mode 100644 index 0000000000..430333b84d --- /dev/null +++ b/src/mesa/vbo/vbo_save_loopback.c @@ -0,0 +1,194 @@ +/************************************************************************** + * + * Copyright 2005 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 "swrast_setup/swrast_setup.h" +#include "swrast/swrast.h" +#include "tnl/tnl.h" +#include "context.h" + +#include "vbo_context.h" + +#include "glheader.h" +#include "enums.h" +#include "glapi.h" +#include "imports.h" +#include "macros.h" +#include "mtypes.h" +#include "dispatch.h" + + +typedef void (*attr_func)( GLcontext *ctx, GLint target, const GLfloat * ); + + +/* This file makes heavy use of the aliasing of NV vertex attributes + * with the legacy attributes, and also with ARB and Material + * attributes as currently implemented. + */ +static void VertexAttrib1fvNV(GLcontext *ctx, GLint target, const GLfloat *v) +{ + CALL_VertexAttrib1fvNV(ctx->Exec, (target, v)); +} + +static void VertexAttrib2fvNV(GLcontext *ctx, GLint target, const GLfloat *v) +{ + CALL_VertexAttrib2fvNV(ctx->Exec, (target, v)); +} + +static void VertexAttrib3fvNV(GLcontext *ctx, GLint target, const GLfloat *v) +{ + CALL_VertexAttrib3fvNV(ctx->Exec, (target, v)); +} + +static void VertexAttrib4fvNV(GLcontext *ctx, GLint target, const GLfloat *v) +{ + CALL_VertexAttrib4fvNV(ctx->Exec, (target, v)); +} + +static attr_func vert_attrfunc[4] = { + VertexAttrib1fvNV, + VertexAttrib2fvNV, + VertexAttrib3fvNV, + VertexAttrib4fvNV +}; + +struct loopback_attr { + GLint target; + GLint sz; + attr_func func; +}; + +/* Don't emit ends and begins on wrapped primitives. Don't replay + * wrapped vertices. If we get here, it's probably because the the + * precalculated wrapping is wrong. + */ +static void loopback_prim( GLcontext *ctx, + const GLfloat *buffer, + const struct _mesa_prim *prim, + GLuint wrap_count, + GLuint vertex_size, + const struct loopback_attr *la, GLuint nr ) +{ + GLint start = prim->start; + GLint end = start + prim->count; + const GLfloat *data; + GLint j; + GLuint k; + + if (0) + _mesa_printf("loopback prim %s(%s,%s) verts %d..%d\n", + _mesa_lookup_enum_by_nr(prim->mode), + prim->begin ? "begin" : "..", + prim->end ? "end" : "..", + start, + end); + + if (prim->begin) { + CALL_Begin(GET_DISPATCH(), ( prim->mode )); + } + else { + assert(start == 0); + start += wrap_count; + } + + data = buffer + start * vertex_size; + + for (j = start ; j < end ; j++) { + const GLfloat *tmp = data + la[0].sz; + + for (k = 1 ; k < nr ; k++) { + la[k].func( ctx, la[k].target, tmp ); + tmp += la[k].sz; + } + + /* Fire the vertex + */ + la[0].func( ctx, VBO_ATTRIB_POS, data ); + data = tmp; + } + + if (prim->end) { + CALL_End(GET_DISPATCH(), ()); + } +} + +/* Primitives generated by DrawArrays/DrawElements/Rectf may be + * caught here. If there is no primitive in progress, execute them + * normally, otherwise need to track and discard the generated + * primitives. + */ +static void loopback_weak_prim( GLcontext *ctx, + const struct _mesa_prim *prim ) +{ + /* Use the prim_weak flag to ensure that if this primitive + * wraps, we don't mistake future vertex_lists for part of the + * surrounding primitive. + * + * While this flag is set, we are simply disposing of data + * generated by an operation now known to be a noop. + */ + if (prim->begin) + ctx->Driver.CurrentExecPrimitive |= VBO_SAVE_PRIM_WEAK; + if (prim->end) + ctx->Driver.CurrentExecPrimitive &= ~VBO_SAVE_PRIM_WEAK; +} + + +void vbo_loopback_vertex_list( GLcontext *ctx, + const GLfloat *buffer, + const GLubyte *attrsz, + const struct _mesa_prim *prim, + GLuint prim_count, + GLuint wrap_count, + GLuint vertex_size) +{ + struct loopback_attr la[VBO_ATTRIB_MAX]; + GLuint i, nr = 0; + + /* All Legacy, NV, ARB and Material attributes are routed through + * the NV attributes entrypoints: + */ + for (i = 0 ; i < VBO_ATTRIB_MAX ; i++) { + if (attrsz[i]) { + la[nr].target = i; + la[nr].sz = attrsz[i]; + la[nr].func = vert_attrfunc[attrsz[i]-1]; + nr++; + } + } + + for (i = 0 ; i < prim_count ; i++) { + if ((prim[i].mode & VBO_SAVE_PRIM_WEAK) && + (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END)) + { + loopback_weak_prim( ctx, &prim[i] ); + } + else + { + loopback_prim( ctx, buffer, &prim[i], wrap_count, vertex_size, la, nr ); + } + } +} |