pixelshader.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

    {WINED3DSIO_NRM,      "nrm",      NULL, 1, 2, NULL, shader_glsl_map2gl, 0, 0},
    {WINED3DSIO_SINCOS,   "sincos",   NULL, 1, 4, NULL, shader_glsl_sincos, WINED3DPS_VERSION(2,0), WINED3DPS_VERSION(2,1)},
    {WINED3DSIO_SINCOS,   "sincos",   NULL, 1, 2, NULL, shader_glsl_sincos, WINED3DPS_VERSION(3,0), -1},
    /* TODO: dp2add can be made out of multiple instuctions */
    {WINED3DSIO_DP2ADD,   "dp2add",   GLNAME_REQUIRE_GLSL,  1, 4, NULL, pshader_glsl_dp2add, WINED3DPS_VERSION(2,0), -1},
    /* Matrix */
    {WINED3DSIO_M4x4, "m4x4", "undefined", 1, 3, NULL, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M4x3, "m4x3", "undefined", 1, 3, NULL, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x4, "m3x4", "undefined", 1, 3, NULL, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x3, "m3x3", "undefined", 1, 3, NULL, shader_glsl_mnxn, 0, 0},
    {WINED3DSIO_M3x2, "m3x2", "undefined", 1, 3, NULL, shader_glsl_mnxn, 0, 0},
    /* Register declarations */
    {WINED3DSIO_DCL,      "dcl",      NULL, 0, 2, NULL, NULL, 0, 0},
    /* Flow control - requires GLSL or software shaders */
    {WINED3DSIO_REP ,     "rep",      NULL, 0, 1, NULL, shader_glsl_rep,    WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_ENDREP,   "endrep",   NULL, 0, 0, NULL, shader_glsl_end,    WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_IF,       "if",       NULL, 0, 1, NULL, shader_glsl_if,     WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_IFC,      "ifc",      NULL, 0, 2, NULL, shader_glsl_ifc,    WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_ELSE,     "else",     NULL, 0, 0, NULL, shader_glsl_else,   WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_ENDIF,    "endif",    NULL, 0, 0, NULL, shader_glsl_end,    WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_BREAK,    "break",    NULL, 0, 0, NULL, shader_glsl_break,  WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_BREAKC,   "breakc",   NULL, 0, 2, NULL, shader_glsl_breakc, WINED3DPS_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, WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_CALLNZ,   "callnz",   NULL, 0, 2, NULL, shader_glsl_callnz, WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_LOOP,     "loop",     NULL, 0, 2, NULL, shader_glsl_loop,   WINED3DPS_VERSION(3,0), -1},
    {WINED3DSIO_RET,      "ret",      NULL, 0, 0, NULL, NULL,               WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_ENDLOOP,  "endloop",  NULL, 0, 0, NULL, shader_glsl_end,    WINED3DPS_VERSION(3,0), -1},
    {WINED3DSIO_LABEL,    "label",    NULL, 0, 1, NULL, shader_glsl_label,  WINED3DPS_VERSION(2,1), -1},
    /* Constant definitions */
    {WINED3DSIO_DEF,      "def",      "undefined",         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},
    /* Texture */
    {WINED3DSIO_TEXCOORD, "texcoord", "undefined", 1, 1, pshader_hw_texcoord, pshader_glsl_texcoord, 0, WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXCOORD, "texcrd",   "undefined", 1, 2, pshader_hw_texcoord, pshader_glsl_texcoord, WINED3DPS_VERSION(1,4), WINED3DPS_VERSION(1,4)},
    {WINED3DSIO_TEXKILL,  "texkill",  "KIL",       1, 1, pshader_hw_map2gl, pshader_glsl_texkill, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(3,0)},
    {WINED3DSIO_TEX,      "tex",      "undefined", 1, 1, pshader_hw_tex, pshader_glsl_tex, 0, WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEX,      "texld",    "undefined", 1, 2, pshader_hw_tex, pshader_glsl_tex, WINED3DPS_VERSION(1,4), WINED3DPS_VERSION(1,4)},
    {WINED3DSIO_TEX,      "texld",    "undefined", 1, 3, pshader_hw_tex, pshader_glsl_tex, WINED3DPS_VERSION(2,0), -1},
    {WINED3DSIO_TEXBEM,   "texbem",   "undefined", 1, 2, pshader_hw_texbem, pshader_glsl_texbem, 0, WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXBEML,  "texbeml",  GLNAME_REQUIRE_GLSL, 1, 2, NULL, NULL, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXREG2AR,"texreg2ar","undefined", 1, 2, pshader_hw_texreg2ar, pshader_glsl_texreg2ar, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXREG2GB,"texreg2gb","undefined", 1, 2, pshader_hw_texreg2gb, pshader_glsl_texreg2gb, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXREG2RGB,   "texreg2rgb",   GLNAME_REQUIRE_GLSL, 1, 2, NULL, pshader_glsl_texreg2rgb, WINED3DPS_VERSION(1,2), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x2PAD,   "texm3x2pad",   "undefined", 1, 2, pshader_hw_texm3x2pad, pshader_glsl_texm3x2pad, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x2TEX,   "texm3x2tex",   "undefined", 1, 2, pshader_hw_texm3x2tex, pshader_glsl_texm3x2tex, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x3PAD,   "texm3x3pad",   "undefined", 1, 2, pshader_hw_texm3x3pad, pshader_glsl_texm3x3pad, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x3DIFF,  "texm3x3diff",  GLNAME_REQUIRE_GLSL, 1, 2, NULL, NULL, WINED3DPS_VERSION(0,0), WINED3DPS_VERSION(0,0)},
    {WINED3DSIO_TEXM3x3SPEC,  "texm3x3spec",  "undefined", 1, 3, pshader_hw_texm3x3spec, pshader_glsl_texm3x3spec, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x3VSPEC, "texm3x3vspec",  "undefined", 1, 2, pshader_hw_texm3x3vspec, pshader_glsl_texm3x3vspec, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x3TEX,   "texm3x3tex",   "undefined", 1, 2, pshader_hw_texm3x3tex, pshader_glsl_texm3x3tex, WINED3DPS_VERSION(1,0), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXDP3TEX,    "texdp3tex",    GLNAME_REQUIRE_GLSL, 1, 2, NULL, pshader_glsl_texdp3tex, WINED3DPS_VERSION(1,2), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x2DEPTH, "texm3x2depth", GLNAME_REQUIRE_GLSL, 1, 2, NULL, pshader_glsl_texm3x2depth, WINED3DPS_VERSION(1,3), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXDP3,   "texdp3",   GLNAME_REQUIRE_GLSL, 1, 2, NULL, pshader_glsl_texdp3, WINED3DPS_VERSION(1,2), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXM3x3,  "texm3x3",  GLNAME_REQUIRE_GLSL, 1, 2, NULL, pshader_glsl_texm3x3, WINED3DPS_VERSION(1,2), WINED3DPS_VERSION(1,3)},
    {WINED3DSIO_TEXDEPTH, "texdepth", GLNAME_REQUIRE_GLSL, 1, 1, NULL, pshader_glsl_texdepth, WINED3DPS_VERSION(1,4), WINED3DPS_VERSION(1,4)},
    {WINED3DSIO_BEM,      "bem",      "undefined",         1, 3, pshader_hw_bem, pshader_glsl_bem, WINED3DPS_VERSION(1,4), WINED3DPS_VERSION(1,4)},
    {WINED3DSIO_DSX,      "dsx",      NULL, 1, 2, NULL, shader_glsl_map2gl, WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_DSY,      "dsy",      NULL, 1, 2, NULL, shader_glsl_map2gl, WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_TEXLDD,   "texldd",   GLNAME_REQUIRE_GLSL, 1, 5, NULL, NULL, WINED3DPS_VERSION(2,1), -1},
    {WINED3DSIO_SETP,     "setp",     GLNAME_REQUIRE_GLSL, 1, 3, NULL, NULL, 0, 0},
    {WINED3DSIO_TEXLDL,   "texldl",   NULL, 1, 3, NULL, shader_glsl_texldl, WINED3DPS_VERSION(3,0), -1},
    {WINED3DSIO_PHASE,    "phase",    GLNAME_REQUIRE_GLSL, 0, 0, NULL, NULL, 0, 0},
    {0,               NULL,       NULL,   0, 0, NULL,            NULL, 0, 0}
};

static void pshader_set_limits(
      IWineD3DPixelShaderImpl *This) { 

      This->baseShader.limits.attributes = 0;
      This->baseShader.limits.address = 0;
      This->baseShader.limits.packed_output = 0;

      switch (This->baseShader.hex_version) {
          case WINED3DPS_VERSION(1,0):
          case WINED3DPS_VERSION(1,1):
          case WINED3DPS_VERSION(1,2):
          case WINED3DPS_VERSION(1,3): 
                   This->baseShader.limits.temporary = 2;
                   This->baseShader.limits.constant_float = 8;
                   This->baseShader.limits.constant_int = 0;
                   This->baseShader.limits.constant_bool = 0;
                   This->baseShader.limits.texcoord = 4;
                   This->baseShader.limits.sampler = 4;
                   This->baseShader.limits.packed_input = 0;
                   This->baseShader.limits.label = 0;
                   break;

          case WINED3DPS_VERSION(1,4):
                   This->baseShader.limits.temporary = 6;
                   This->baseShader.limits.constant_float = 8;
                   This->baseShader.limits.constant_int = 0;
                   This->baseShader.limits.constant_bool = 0;
                   This->baseShader.limits.texcoord = 6;
                   This->baseShader.limits.sampler = 6;
                   This->baseShader.limits.packed_input = 0;
                   This->baseShader.limits.label = 0;
                   break;
               
          /* FIXME: temporaries must match D3DPSHADERCAPS2_0.NumTemps */ 
          case WINED3DPS_VERSION(2,0):
                   This->baseShader.limits.temporary = 32;
                   This->baseShader.limits.constant_float = 32;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.texcoord = 8;
                   This->baseShader.limits.sampler = 16;
                   This->baseShader.limits.packed_input = 0;
                   break;

          case WINED3DPS_VERSION(2,1):
                   This->baseShader.limits.temporary = 32;
                   This->baseShader.limits.constant_float = 32;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.texcoord = 8;
                   This->baseShader.limits.sampler = 16;
                   This->baseShader.limits.packed_input = 0;
                   This->baseShader.limits.label = 16;
                   break;

          case WINED3DPS_VERSION(3,0):
                   This->baseShader.limits.temporary = 32;
                   This->baseShader.limits.constant_float = 224;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.texcoord = 0;
                   This->baseShader.limits.sampler = 16;
                   This->baseShader.limits.packed_input = 12;
                   This->baseShader.limits.label = 16; /* FIXME: 2048 */
                   break;

          default: This->baseShader.limits.temporary = 32;
                   This->baseShader.limits.constant_float = 32;
                   This->baseShader.limits.constant_int = 16;
                   This->baseShader.limits.constant_bool = 16;
                   This->baseShader.limits.texcoord = 8;
                   This->baseShader.limits.sampler = 16;
                   This->baseShader.limits.packed_input = 0;
                   This->baseShader.limits.label = 0;
                   FIXME("Unrecognized pixel shader version %#x\n", 
                       This->baseShader.hex_version);
      }
}

/** Generate a pixel shader string using either GL_FRAGMENT_PROGRAM_ARB
    or GLSL and send it to the card */
static inline VOID IWineD3DPixelShaderImpl_GenerateShader(
    IWineD3DPixelShader *iface,
    shader_reg_maps* reg_maps,
    CONST DWORD *pFunction) {

    IWineD3DPixelShaderImpl *This = (IWineD3DPixelShaderImpl *)iface;
    SHADER_BUFFER buffer;

#if 0 /* FIXME: Use the buffer that is held by the device, this is ok since fixups will be skipped for software shaders
        it also requires entering a critical section but cuts down the runtime footprint of wined3d and any memory fragmentation that may occur... */
    if (This->device->fixupVertexBufferSize < SHADER_PGMSIZE) {
        HeapFree(GetProcessHeap(), 0, This->fixupVertexBuffer);
        This->fixupVertexBuffer = HeapAlloc(GetProcessHeap() , 0, SHADER_PGMSIZE);
        This->fixupVertexBufferSize = PGMSIZE;
        This->fixupVertexBuffer[0] = 0;
    }
    buffer.buffer = This->device->fixupVertexBuffer;
#else
    buffer.buffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, SHADER_PGMSIZE); 
#endif
    buffer.bsize = 0;
    buffer.lineNo = 0;
    buffer.newline = TRUE;

    if (This->baseShader.shader_mode == SHADER_GLSL) {

        /* Create the hw GLSL shader object and assign it as the baseShader.prgId */
        GLhandleARB shader_obj = GL_EXTCALL(glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB));

        if (GL_SUPPORT(ARB_DRAW_BUFFERS)) {
            shader_addline(&buffer, "#extension GL_ARB_draw_buffers : enable\n");
        }

        /* Base Declarations */
        shader_generate_glsl_declarations( (IWineD3DBaseShader*) This, reg_maps, &buffer, &GLINFO_LOCATION);

        /* Pack 3.0 inputs */
        if (This->baseShader.hex_version >= WINED3DPS_VERSION(3,0))
            pshader_glsl_input_pack(&buffer, This->semantics_in);

        /* Base Shader Body */
        shader_generate_main( (IWineD3DBaseShader*) This, &buffer, reg_maps, pFunction);

        /* Pixel shaders < 2.0 place the resulting color in R0 implicitly */
        if (This->baseShader.hex_version < WINED3DPS_VERSION(2,0)) {
            /* Some older cards like GeforceFX ones don't support multiple buffers, so also not gl_FragData */
            if(GL_SUPPORT(ARB_DRAW_BUFFERS))
                shader_addline(&buffer, "gl_FragData[0] = R0;\n");