/* * Mesa 3-D graphics library * Version: 7.2 * * Copyright (C) 1999-2008 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. * * Authors: * Keith Whitwell */ #include "main/glheader.h" #include "main/bufferobj.h" #include "main/context.h" #include "main/enums.h" #include "main/state.h" #include "main/macros.h" #include "vbo_context.h" static void vbo_exec_debug_verts( struct vbo_exec_context *exec ) { GLuint count = exec->vtx.vert_count; GLuint i; _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n", __FUNCTION__, count, exec->vtx.prim_count, exec->vtx.vertex_size); for (i = 0 ; i < exec->vtx.prim_count ; i++) { struct _mesa_prim *prim = &exec->vtx.prim[i]; _mesa_printf(" prim %d: %s%s %d..%d %s %s\n", i, _mesa_lookup_enum_by_nr(prim->mode), prim->weak ? " (weak)" : "", prim->start, prim->start + prim->count, prim->begin ? "BEGIN" : "(wrap)", prim->end ? "END" : "(wrap)"); } } /* * NOTE: Need to have calculated primitives by this point -- do it on the fly. * NOTE: Old 'parity' issue is gone. */ static GLuint vbo_copy_vertices( struct vbo_exec_context *exec ) { GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count; GLuint ovf, i; GLuint sz = exec->vtx.vertex_size; GLfloat *dst = exec->vtx.copied.buffer; GLfloat *src = ((GLfloat *)exec->vtx.buffer_map + exec->vtx.prim[exec->vtx.prim_count-1].start * exec->vtx.vertex_size); switch( exec->ctx->Driver.CurrentExecPrimitive ) { case GL_POINTS: return 0; case GL_LINES: ovf = nr&1; for (i = 0 ; i < ovf ; i++) _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) ); return i; case GL_TRIANGLES: ovf = nr%3; for (i = 0 ; i < ovf ; i++) _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) ); return i; case GL_QUADS: ovf = nr&3; for (i = 0 ; i < ovf ; i++) _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) ); return i; case GL_LINE_STRIP: if (nr == 0) return 0; else { _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) ); return 1; } case GL_LINE_LOOP: case GL_TRIANGLE_FAN: case GL_POLYGON: if (nr == 0) return 0; else if (nr == 1) { _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) ); return 1; } else { _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) ); _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) ); return 2; } case GL_TRIANGLE_STRIP: /* no parity issue, but need to make sure the tri is not drawn twice */ if (nr & 1) { exec->vtx.prim[exec->vtx.prim_count-1].count--; } /* fallthrough */ case GL_QUAD_STRIP: switch (nr) { case 0: ovf = 0; break; case 1: ovf = 1; break; default: ovf = 2 + (nr&1); break; } for (i = 0 ; i < ovf ; i++) _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) ); return i; case PRIM_OUTSIDE_BEGIN_END: return 0; default: assert(0); return 0; } } /* TODO: populate these as the vertex is defined: */ static void vbo_exec_bind_arrays( GLcontext *ctx ) { struct vbo_context *vbo = vbo_context(ctx); struct vbo_exec_context *exec = &vbo->exec; struct gl_client_array *arrays = exec->vtx.arrays; GLuint count = exec->vtx.vert_count; GLubyte *data = exec->vtx.buffer_map; const GLuint *map; GLuint attr; /* Install the default (ie Current) attributes first, then overlay * all active ones. */ switch (get_program_mode(exec->ctx)) { case VP_NONE: for (attr = 0; attr < 16; attr++) { exec->vtx.inputs[attr] = &vbo->legacy_currval[attr]; } for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) { exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr]; } map = vbo->map_vp_none; break; case VP_NV: case VP_ARB: /* The aliasing of attributes for NV vertex programs has already * occurred. NV vertex programs cannot access material values, * nor attributes greater than VERT_ATTRIB_TEX7. */ for (attr = 0; attr < 16; attr++) { exec->vtx.inputs[attr] = &vbo->legacy_currval[attr]; exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr]; } map = vbo->map_vp_arb; break; } /* Make all active attributes (including edgeflag) available as * arrays of floats. */ for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) { const GLuint src = map[attr]; if (exec->vtx.attrsz[src]) { /* override the default array set above */ exec->vtx.inputs[attr] = &arrays[attr]; if (exec->vtx.bufferobj->Name) { /* a real buffer obj: Ptr is an offset, not a pointer*/ int offset; assert(exec->vtx.bufferobj->Pointer); /* buf should be mapped */ offset = (GLbyte *) data - (GLbyte *) exec->vtx.bufferobj->Pointer; assert(offset >= 0); arrays[attr].Ptr = (void *) offset; } else { /* Ptr into ordinary app memory */ arrays[attr].Ptr = (void *) data; } arrays[attr].Size = exec->vtx.attrsz[src]; arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat); arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat); arrays[attr].Type = GL_FLOAT; arrays[attr].Enabled = 1; _mesa_reference_buffer_object(ctx, &arrays[attr].BufferObj, exec->vtx.bufferobj); arrays[attr]._MaxElement = count; /* ??? */ data += exec->vtx.attrsz[src] * sizeof(GLfloat); } } } /** * Execute the buffer and save copied verts. */ void vbo_exec_vtx_flush( struct vbo_exec_context *exec ) { if (0) vbo_exec_debug_verts( exec ); if (exec->vtx.prim_count && exec->vtx.vert_count) { exec->vtx.copied.nr = vbo_copy_vertices( exec ); if (exec->vtx.copied.nr != exec->vtx.vert_count) { GLcontext *ctx = exec->ctx; GLenum target = GL_ARRAY_BUFFER_ARB; GLenum access = GL_READ_WRITE_ARB; GLenum usage = GL_STREAM_DRAW_ARB; GLsizei size = VBO_VERT_BUFFER_SIZE * sizeof(GLfloat); /* Before the unmap (why?) */ vbo_exec_bind_arrays( ctx ); /* if using a real VBO, unmap it before drawing */ if (exec->vtx.bufferobj->Name) { ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj); exec->vtx.buffer_map = NULL; } vbo_context(ctx)->draw_prims( ctx, exec->vtx.inputs, exec->vtx.prim, exec->vtx.prim_count, NULL, 0, exec->vtx.vert_count - 1); /* If using a real VBO, get new storage */ if (exec->vtx.bufferobj->Name) { ctx->Driver.BufferData(ctx, target, size, NULL, usage, exec->vtx.bufferobj); exec->vtx.buffer_map = ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj); } } } exec->vtx.prim_count = 0; exec->vtx.vert_count = 0; exec->vtx.vbptr = (GLfloat *)exec->vtx.buffer_map; }