vertexshader.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 * shaders implementation
 *
 * Copyright 2002-2003 Jason Edmeades
 * Copyright 2002-2003 Raphael Junqueira
 * Copyright 2004 Christian Costa
 * Copyright 2005 Oliver Stieber
 * Copyright 2006 Ivan Gyurdiev
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"

#include <math.h>
#include <stdio.h>

#include "wined3d_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(d3d_shader);

#define GLINFO_LOCATION ((IWineD3DDeviceImpl *)This->baseShader.device)->adapter->gl_info

/* Shader debugging - Change the following line to enable debugging of software
      vertex shaders                                                             */
#if 0 /* Musxt not be 1 in cvs version */
# define VSTRACE(A) TRACE A
# define TRACE_VSVECTOR(name) TRACE( #name "=(%f, %f, %f, %f)\n", name.x, name.y, name.z, name.w)
#else
# define VSTRACE(A)
# define TRACE_VSVECTOR(name)
#endif

/**
 * DirectX9 SDK download
 *  http://msdn.microsoft.com/library/default.asp?url=/downloads/list/directx.asp
 *
 * Exploring D3DX
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndrive/html/directx07162002.asp
 *
 * Using Vertex Shaders
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndrive/html/directx02192001.asp
 *
 * Dx9 New
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/whatsnew.asp
 *
 * Dx9 Shaders
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/reference/Shaders/VertexShader2_0/VertexShader2_0.asp
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/reference/Shaders/VertexShader2_0/Instructions/Instructions.asp
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/programmingguide/GettingStarted/VertexDeclaration/VertexDeclaration.asp
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/reference/Shaders/VertexShader3_0/VertexShader3_0.asp
 *
 * Dx9 D3DX
 *  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/directx9_c/directx/graphics/programmingguide/advancedtopics/VertexPipe/matrixstack/matrixstack.asp
 *
 * FVF
 *  http://msdn.microsoft.com/library/en-us/directx9_c/directx/graphics/programmingguide/GettingStarted/VertexFormats/vformats.asp
 *
 * NVIDIA: DX8 Vertex Shader to NV Vertex Program
 *  http://developer.nvidia.com/view.asp?IO=vstovp
 *
 * NVIDIA: Memory Management with VAR
 *  http://developer.nvidia.com/view.asp?IO=var_memory_management
 */

/* TODO: Vertex and Pixel shaders are almost identicle, the only exception being the way that some of the data is looked up or the availablity of some of the data i.e. some instructions are only valid for pshaders and some for vshaders
because of this the bulk of the software pipeline can be shared between pixel and vertex shaders... and it wouldn't supprise me if the programes can be cross compiled using a large body body shared code */

#define GLNAME_REQUIRE_GLSL  ((const char *)1)

CONST SHADER_OPCODE IWineD3DVertexShaderImpl_shader_ins[] = {
    /* This table is not order or position dependent. */

    /* Arithmetic */
    {WINED3DSIO_NOP,    "nop",  "NOP", 0, 0, vshader_hw_map2gl,   NULL, 0, 0},
    {WINED3DSIO_MOV,    "mov",  "MOV", 1, 2, vshader_hw_map2gl,   shader_glsl_mov, 0, 0},
    {WINED3DSIO_MOVA,   "mova",  NULL, 1, 2, vshader_hw_map2gl,   shader_glsl_mov, WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_ADD,    "add",  "ADD", 1, 3, vshader_hw_map2gl,   shader_glsl_arith, 0, 0},
    {WINED3DSIO_SUB,    "sub",  "SUB", 1, 3, vshader_hw_map2gl,   shader_glsl_arith, 0, 0},
    {WINED3DSIO_MAD,    "mad",  "MAD", 1, 4, vshader_hw_map2gl,   shader_glsl_mad, 0, 0},
    {WINED3DSIO_MUL,    "mul",  "MUL", 1, 3, vshader_hw_map2gl,   shader_glsl_arith, 0, 0},
    {WINED3DSIO_RCP,    "rcp",  "RCP", 1, 2, vshader_hw_rsq_rcp,  shader_glsl_rcp, 0, 0},
    {WINED3DSIO_RSQ,    "rsq",  "RSQ", 1, 2, vshader_hw_rsq_rcp,  shader_glsl_rsq, 0, 0},
    {WINED3DSIO_DP3,    "dp3",  "DP3", 1, 3, vshader_hw_map2gl,   shader_glsl_dot, 0, 0},
    {WINED3DSIO_DP4,    "dp4",  "DP4", 1, 3, vshader_hw_map2gl,   shader_glsl_dot, 0, 0},
    {WINED3DSIO_MIN,    "min",  "MIN", 1, 3, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_MAX,    "max",  "MAX", 1, 3, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_SLT,    "slt",  "SLT", 1, 3, vshader_hw_map2gl,   shader_glsl_compare, 0, 0},
    {WINED3DSIO_SGE,    "sge",  "SGE", 1, 3, vshader_hw_map2gl,   shader_glsl_compare, 0, 0},
    {WINED3DSIO_ABS,    "abs",  "ABS", 1, 2, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_EXP,    "exp",  "EX2", 1, 2, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_LOG,    "log",  "LG2", 1, 2, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_EXPP,   "expp", "EXP", 1, 2, vshader_hw_map2gl,   shader_glsl_expp, 0, 0},
    {WINED3DSIO_LOGP,   "logp", "LOG", 1, 2, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_LIT,    "lit",  "LIT", 1, 2, vshader_hw_map2gl,   shader_glsl_lit, 0, 0},
    {WINED3DSIO_DST,    "dst",  "DST", 1, 3, vshader_hw_map2gl,   shader_glsl_dst, 0, 0},
    {WINED3DSIO_LRP,    "lrp",  "LRP", 1, 4, NULL,                shader_glsl_lrp, 0, 0},
    {WINED3DSIO_FRC,    "frc",  "FRC", 1, 2, vshader_hw_map2gl,   shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_POW,    "pow",  "POW", 1, 3, NULL,                shader_glsl_pow, 0, 0},
    {WINED3DSIO_CRS,    "crs",  "XPS", 1, 3, NULL,                shader_glsl_cross, 0, 0},
    /* TODO: sng can possibly be performed a  s
        RCP tmp, vec
        MUL out, tmp, vec*/
    {WINED3DSIO_SGN,  "sgn",  NULL,  1, 2, NULL,                shader_glsl_map2gl, 0, 0},
    /* TODO: xyz normalise can be performed as VS_ARB using one temporary register,
        DP3 tmp , vec, vec;
        RSQ tmp, tmp.x;
        MUL vec.xyz, vec, tmp;
    but I think this is better because it accounts for w properly.
        DP3 tmp , vec, vec;
        RSQ tmp, tmp.x;
        MUL vec, vec, tmp;
    */
    {WINED3DSIO_NRM,    "nrm",      NULL, 1, 2, NULL, shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_SINCOS, "sincos",   NULL, 1, 4, NULL, shader_glsl_sincos, WINED3DVS_VERSION(2,0), WINED3DVS_VERSION(2,1)},
    {WINED3DSIO_SINCOS, "sincos",   NULL, 1, 2, NULL, shader_glsl_sincos, WINED3DVS_VERSION(3,0), -1},
    /* Matrix */
    {WINED3DSIO_M4x4,   "m4x4", "undefined", 1, 3, vshader_hw_mnxn, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M4x3,   "m4x3", "undefined", 1, 3, vshader_hw_mnxn, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x4,   "m3x4", "undefined", 1, 3, vshader_hw_mnxn, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x3,   "m3x3", "undefined", 1, 3, vshader_hw_mnxn, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x2,   "m3x2", "undefined", 1, 3, vshader_hw_mnxn, shader_glsl_mnxn, 0, 0},
    /* Declare registers */
    {WINED3DSIO_DCL,    "dcl",      NULL,                0, 2, NULL, NULL, 0, 0},
    /* Constant definitions */
    {WINED3DSIO_DEF,    "def",      NULL,                1, 5, NULL, NULL, 0, 0},
    {WINED3DSIO_DEFB,   "defb",     GLNAME_REQUIRE_GLSL, 1, 2, NULL, NULL, 0, 0},
    {WINED3DSIO_DEFI,   "defi",     GLNAME_REQUIRE_GLSL, 1, 5, NULL, NULL, 0, 0},
    /* Flow control - requires GLSL or software shaders */
    {WINED3DSIO_REP ,   "rep",      NULL, 0, 1, NULL, shader_glsl_rep,    WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_ENDREP, "endrep",   NULL, 0, 0, NULL, shader_glsl_end,    WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_IF,     "if",       NULL, 0, 1, NULL, shader_glsl_if,     WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_IFC,    "ifc",      NULL, 0, 2, NULL, shader_glsl_ifc,    WINED3DVS_VERSION(2,1), -1},
    {WINED3DSIO_ELSE,   "else",     NULL, 0, 0, NULL, shader_glsl_else,   WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_ENDIF,  "endif",    NULL, 0, 0, NULL, shader_glsl_end,    WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_BREAK,  "break",    NULL, 0, 0, NULL, shader_glsl_break,  WINED3DVS_VERSION(2,1), -1},
    {WINED3DSIO_BREAKC, "breakc",   NULL, 0, 2, NULL, shader_glsl_breakc, WINED3DVS_VERSION(2,1), -1},
    {WINED3DSIO_BREAKP, "breakp",   GLNAME_REQUIRE_GLSL, 0, 1, NULL, NULL, 0, 0},
    {WINED3DSIO_CALL,   "call",     NULL, 0, 1, NULL, shader_glsl_call,   WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_CALLNZ, "callnz",   NULL, 0, 2, NULL, shader_glsl_callnz, WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_LOOP,   "loop",     NULL, 0, 2, NULL, shader_glsl_loop,   WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_RET,    "ret",      NULL, 0, 0, NULL, NULL,               WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_ENDLOOP,"endloop",  NULL, 0, 0, NULL, shader_glsl_end,    WINED3DVS_VERSION(2,0), -1},
    {WINED3DSIO_LABEL,  "label",    NULL, 0, 1, NULL, shader_glsl_label,  WINED3DVS_VERSION(2,0), -1},

    {WINED3DSIO_SETP,   "setp",     GLNAME_REQUIRE_GLSL, 1, 3, NULL, NULL, 0, 0},
    {WINED3DSIO_TEXLDL, "texldl",   NULL, 1, 3, NULL, shader_glsl_texldl, WINED3DVS_VERSION(3,0), -1},
    {0,                 NULL,       NULL,                0, 0, NULL, NULL, 0, 0}
};

static void vshader_set_limits(
      IWineD3DVertexShaderImpl *This) {

      This->baseShader.limits.texcoord = 0;
      This->baseShader.limits.attributes = 16;
      This->baseShader.limits.packed_input = 0;

      /* Must match D3DCAPS9.MaxVertexShaderConst: at least 256 for vs_2_0 */
      This->baseShader.limits.constant_float = GL_LIMITS(vshader_constantsF);

      switch (This->baseShader.hex_version) {
          case WINED3DVS_VERSION(1,0):
          case WINED3DVS_VERSION(1,1):
                   This->baseShader.limits.temporary = 12;
                   This->baseShader.limits.constant_bool = 0;
                   This->baseShader.limits.constant_int = 0;
                   This->baseShader.limits.address = 1;
                   This->baseShader.limits.packed_output = 0;
                   This->baseShader.limits.sampler = 0;
                   This->baseShader.limits.label = 0;
                   break;
      
          case WINED3DVS_VERSION(2,0):
          case WINED3DVS_VERSION(2,1):
                   This->baseShader.limits.temporary = 12;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.address = 1;
                   This->baseShader.limits.packed_output = 0;
                   This->baseShader.limits.sampler = 0;
                   This->baseShader.limits.label = 16;
                   break;

          case WINED3DVS_VERSION(3,0):
                   This->baseShader.limits.temporary = 32;
                   This->baseShader.limits.constant_bool = 32;
                   This->baseShader.limits.constant_int = 32;
                   This->baseShader.limits.address = 1;
                   This->baseShader.limits.packed_output = 12;
                   This->baseShader.limits.sampler = 4;
                   This->baseShader.limits.label = 16; /* FIXME: 2048 */
                   break;

          default: This->baseShader.limits.temporary = 12;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.address = 1;
                   This->baseShader.limits.packed_output = 0;
                   This->baseShader.limits.sampler = 0;
                   This->baseShader.limits.label = 16;
                   FIXME("Unrecognized vertex shader version %#x\n",
                       This->baseShader.hex_version);
      }
}

/* This is an internal function,
 * used to create fake semantics for shaders
 * that don't have them - d3d8 shaders where the declaration
 * stores the register for each input
 */