| /* |
| * Copyright 2003 Tungsten Graphics, inc. |
| * 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 |
| * on 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 THEIR 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 <keithw@tungstengraphics.com> |
| */ |
| |
| #include "glheader.h" |
| #include "context.h" |
| #include "colormac.h" |
| |
| #include "t_context.h" |
| #include "t_vertex.h" |
| |
| #include "simple_list.h" |
| |
| #ifdef WIN32 |
| #define vsnprintf _vsnprintf |
| #endif |
| |
| /* A version of code generation for t_clipspace_codegen.c which prints |
| * out 'c' code to implement the generated function. A useful |
| * debugging tool, and in concert with something like tcc or a |
| * library-ized gcc, could do the whole job. |
| */ |
| |
| |
| static GLboolean emit( struct tnl_clipspace_codegen *p, |
| const char *fmt, |
| ... ) |
| { |
| if (p->buf_used < p->buf_size) { |
| va_list ap; |
| va_start( ap, fmt ); |
| p->buf_used += vsnprintf( p->buf + p->buf_used, |
| p->buf_size - p->buf_used, |
| fmt, ap ); |
| va_end( ap ); |
| } |
| |
| return p->buf_used < p->buf_size; |
| } |
| |
| |
| static GLboolean print_header( struct tnl_clipspace_codegen *p, |
| struct tnl_clipspace *vtx ) |
| { |
| p->buf_used = 0; |
| p->out_offset = 0; |
| |
| return |
| emit(p, |
| "struct tnl_clipspace_attr\n" |
| "{\n" |
| " unsigned int attrib; \n" |
| " unsigned int format;\n" |
| " unsigned int vertoffset; \n" |
| " unsigned int vertattrsize; \n" |
| " char *inputptr;\n" |
| " unsigned int inputstride;\n" |
| " void *insert;\n" |
| " void *emit;\n" |
| " void * extract;\n" |
| " const float *vp; \n" |
| "};\n" |
| "\n" |
| ) && |
| emit(p, |
| "void emit_vertices( int start, int end, char *dest, \n" |
| " struct tnl_clipspace_attr *a) \n" |
| "{\n" |
| " int i;" |
| " for (i = start ; i < end ; i++, dest += %d) {\n", |
| vtx->vertex_size); |
| |
| } |
| |
| static GLboolean print_footer( struct tnl_clipspace_codegen *p ) |
| { |
| return |
| emit(p, |
| " }\n" |
| "}\n" |
| ); |
| } |
| |
| static GLboolean emit_reg( struct tnl_clipspace_codegen *p, GLint reg ) |
| { |
| int idx = reg & REG_OFFSET_MASK; |
| |
| switch (reg & REG_MASK) { |
| case REG_IN: return emit(p, "in[%d]", idx); |
| case REG_VP: return emit(p, "vp[%d]", idx); |
| case REG_TMP: return emit(p, "temp[%d]", idx); /* not used? */ |
| case REG_OUT: return emit(p, "out[%d]", idx); |
| } |
| |
| return GL_FALSE; |
| } |
| |
| static GLboolean print_mov( struct tnl_clipspace_codegen *p, GLint dest, GLint src ) |
| { |
| return |
| emit(p, " ") && |
| emit_reg(p, dest) && |
| emit(p, " = ") && |
| emit_reg(p, src) && |
| emit(p, ";\n"); |
| } |
| |
| |
| static GLboolean print_const( struct tnl_clipspace_codegen *p, |
| GLint dest, GLfloat c ) |
| { |
| return |
| emit(p, " ") && |
| emit_reg(p, dest) && |
| emit(p, " = %g;\n", c); |
| } |
| |
| static GLboolean print_const_chan( struct tnl_clipspace_codegen *p, |
| GLint dest, GLchan c ) |
| { |
| return |
| emit(p, " ") && |
| emit_reg(p, dest) && |
| emit(p, " = ") && |
| #if CHAN_TYPE == GL_FLOAT |
| emit(p, "%f", c) && |
| #else |
| emit(p, "%d", c) && |
| #endif |
| emit(p, ";\n"); |
| } |
| |
| static GLboolean print_const_ubyte( struct tnl_clipspace_codegen *p, |
| GLint dest, GLubyte c ) |
| { |
| return |
| emit(p, " ") && |
| emit_reg(p, dest) && |
| emit(p, " = %x;\n", c); |
| } |
| |
| static GLboolean print_mad( struct tnl_clipspace_codegen *p, |
| GLint dest, GLint src0, GLint src1, GLint src2 ) |
| { |
| return |
| emit(p, " ") && |
| emit_reg(p, dest) && |
| emit(p, " = ") && |
| emit_reg(p, src0) && |
| emit(p, " * ") && |
| emit_reg(p, src1) && |
| emit(p, " + ") && |
| emit_reg(p, src2) && |
| emit(p, ";\n"); |
| } |
| |
| static GLboolean print_float_to_ubyte( struct tnl_clipspace_codegen *p, |
| GLint dest, GLint src ) |
| { |
| return |
| emit(p, " ") && |
| emit(p, "UNCLAMPED_FLOAT_TO_UBYTE(") && |
| emit_reg(p, dest) && |
| emit(p, ", ") && |
| emit_reg(p, src) && |
| emit(p, ");\n"); |
| } |
| |
| static GLboolean print_float_to_chan( struct tnl_clipspace_codegen *p, |
| GLint dest, GLint src ) |
| { |
| return |
| emit(p, " ") && |
| emit(p, "UNCLAMPED_FLOAT_TO_CHAN(") && |
| emit_reg(p, dest) && |
| emit(p, ", ") && |
| emit_reg(p, src) && |
| emit(p, ");\n"); |
| } |
| |
| |
| static GLboolean print_attr_header( struct tnl_clipspace_codegen *p, |
| struct tnl_clipspace_attr *a, |
| GLint j, |
| GLenum out_type, |
| GLboolean need_vp) |
| { |
| char *out_type_str = "void"; |
| |
| switch(out_type) { |
| case GL_FLOAT: out_type_str = "float"; break; |
| case GL_UNSIGNED_BYTE: out_type_str = "unsigned char"; break; |
| case GL_UNSIGNED_SHORT: out_type_str = "unsigned short"; break; |
| } |
| |
| return |
| emit(p, " {\n") && |
| (need_vp ? emit(p, " const float *vp = a[%d].vp;\n", j) : 1) && |
| emit(p, " %s *out = (%s *)(dest + %d);\n", |
| out_type_str, out_type_str, a[j].vertoffset) && |
| emit(p, " const float *in = (const float *)a[%d].inputptr;\n", |
| j) && |
| emit(p, " a[%d].inputptr += a[%d].inputstride;\n", j, j); |
| } |
| |
| static GLboolean print_attr_footer( struct tnl_clipspace_codegen *p ) |
| { |
| return |
| emit(p, " }\n"); |
| } |
| |
| static tnl_emit_func print_store_func( struct tnl_clipspace_codegen *p ) |
| { |
| #if defined( WIN32 ) || defined( __VMS ) |
| fprintf(stderr, "%s: emitted:\n%s\n", "print_store_func", p->buf); |
| #else |
| fprintf(stderr, "%s: emitted:\n%s\n", __FUNCTION__, p->buf); |
| #endif |
| return 0; |
| } |
| |
| void _tnl_init_c_codegen( struct tnl_clipspace_codegen *p ) |
| { |
| p->emit_header = print_header; |
| p->emit_footer = print_footer; |
| p->emit_attr_header = print_attr_header; |
| p->emit_attr_footer = print_attr_footer; |
| p->emit_mov = print_mov; |
| p->emit_const = print_const; |
| p->emit_mad = print_mad; |
| p->emit_float_to_chan = print_float_to_chan; |
| p->emit_const_chan = print_const_chan; |
| p->emit_float_to_ubyte = print_float_to_ubyte; |
| p->emit_const_ubyte = print_const_ubyte; |
| p->emit_store_func = print_store_func; |
| |
| make_empty_list(&p->codegen_list); |
| |
| p->buf_size = 2048; |
| p->buf = MALLOC(p->buf_size); |
| } |