texstate.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

void GLAPIENTRY
_mesa_TexParameterf( GLenum target, GLenum pname, GLfloat param )
{
   _mesa_TexParameterfv(target, pname, &param);
}


void GLAPIENTRY
_mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
{
   const GLenum eparam = (GLenum) (GLint) params[0];
   struct gl_texture_unit *texUnit;
   struct gl_texture_object *texObj;
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
      _mesa_debug(ctx, "glTexParameter %s %s %.1f(%s)...\n",
                  _mesa_lookup_enum_by_nr(target),
                  _mesa_lookup_enum_by_nr(pname),
                  *params,
		  _mesa_lookup_enum_by_nr(eparam));

   if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureImageUnits) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameterfv(current unit)");
      return;
   }

   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];

   switch (target) {
      case GL_TEXTURE_1D:
         texObj = texUnit->Current1D;
         break;
      case GL_TEXTURE_2D:
         texObj = texUnit->Current2D;
         break;
      case GL_TEXTURE_3D:
         texObj = texUnit->Current3D;
         break;
      case GL_TEXTURE_CUBE_MAP:
         if (!ctx->Extensions.ARB_texture_cube_map) {
            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
            return;
         }
         texObj = texUnit->CurrentCubeMap;
         break;
      case GL_TEXTURE_RECTANGLE_NV:
         if (!ctx->Extensions.NV_texture_rectangle) {
            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
            return;
         }
         texObj = texUnit->CurrentRect;
         break;
      case GL_TEXTURE_1D_ARRAY_EXT:
         if (!ctx->Extensions.MESA_texture_array) {
            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
            return;
         }
         texObj = texUnit->Current1DArray;
         break;
      case GL_TEXTURE_2D_ARRAY_EXT:
         if (!ctx->Extensions.MESA_texture_array) {
            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
            return;
         }
         texObj = texUnit->Current2DArray;
         break;
      default:
         _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
         return;
   }

   switch (pname) {
      case GL_TEXTURE_MIN_FILTER:
         /* A small optimization */
         if (texObj->MinFilter == eparam)
            return;
         if (eparam==GL_NEAREST || eparam==GL_LINEAR) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->MinFilter = eparam;
         }
         else if ((eparam==GL_NEAREST_MIPMAP_NEAREST ||
                   eparam==GL_LINEAR_MIPMAP_NEAREST ||
                   eparam==GL_NEAREST_MIPMAP_LINEAR ||
                   eparam==GL_LINEAR_MIPMAP_LINEAR) &&
                  texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->MinFilter = eparam;
         }
         else {
            _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
            return;
         }
         break;
      case GL_TEXTURE_MAG_FILTER:
         /* A small optimization */
         if (texObj->MagFilter == eparam)
            return;

         if (eparam==GL_NEAREST || eparam==GL_LINEAR) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->MagFilter = eparam;
         }
         else {
            _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
            return;
         }
         break;
      case GL_TEXTURE_WRAP_S:
         if (texObj->WrapS == eparam)
            return;
         if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->WrapS = eparam;
         }
         else {
            return;
         }
         break;
      case GL_TEXTURE_WRAP_T:
         if (texObj->WrapT == eparam)
            return;
         if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->WrapT = eparam;
         }
         else {
            return;
         }
         break;
      case GL_TEXTURE_WRAP_R:
         if (texObj->WrapR == eparam)
            return;
         if (validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->WrapR = eparam;
         }
         else {
	    return;
         }
         break;
      case GL_TEXTURE_BORDER_COLOR:
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->BorderColor[RCOMP] = params[0];
         texObj->BorderColor[GCOMP] = params[1];
         texObj->BorderColor[BCOMP] = params[2];
         texObj->BorderColor[ACOMP] = params[3];
         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[RCOMP], params[0]);
         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[GCOMP], params[1]);
         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[BCOMP], params[2]);
         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[ACOMP], params[3]);
         break;
      case GL_TEXTURE_MIN_LOD:
         if (texObj->MinLod == params[0])
            return;
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->MinLod = params[0];
         break;
      case GL_TEXTURE_MAX_LOD:
         if (texObj->MaxLod == params[0])
            return;
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->MaxLod = params[0];
         break;
      case GL_TEXTURE_BASE_LEVEL:
         if (params[0] < 0.0) {
            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)");
            return;
         }
         if (target == GL_TEXTURE_RECTANGLE_ARB && params[0] != 0.0) {
            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)");
            return;
         }
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->BaseLevel = (GLint) params[0];
         break;
      case GL_TEXTURE_MAX_LEVEL:
         if (params[0] < 0.0) {
            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)");
            return;
         }
         if (target == GL_TEXTURE_RECTANGLE_ARB) {
            _mesa_error(ctx, GL_INVALID_OPERATION, "glTexParameter(param)");
            return;
         }
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->MaxLevel = (GLint) params[0];
         break;
      case GL_TEXTURE_PRIORITY:
         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
         texObj->Priority = CLAMP( params[0], 0.0F, 1.0F );
         break;
      case GL_TEXTURE_MAX_ANISOTROPY_EXT:
         if (ctx->Extensions.EXT_texture_filter_anisotropic) {
	    if (params[0] < 1.0) {
	       _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
	       return;
	    }
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            /* clamp to max, that's what NVIDIA does */
            texObj->MaxAnisotropy = MIN2(params[0],
                                         ctx->Const.MaxTextureMaxAnisotropy);
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
            return;
         }
         break;
      case GL_TEXTURE_COMPARE_SGIX:
         if (ctx->Extensions.SGIX_shadow) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->CompareFlag = params[0] ? GL_TRUE : GL_FALSE;
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_TEXTURE_COMPARE_SGIX)");
            return;
         }
         break;
      case GL_TEXTURE_COMPARE_OPERATOR_SGIX:
         if (ctx->Extensions.SGIX_shadow) {
            GLenum op = (GLenum) params[0];
            if (op == GL_TEXTURE_LEQUAL_R_SGIX ||
                op == GL_TEXTURE_GEQUAL_R_SGIX) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->CompareOperator = op;
            }
            else {
               _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param)");
            }
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                    "glTexParameter(pname=GL_TEXTURE_COMPARE_OPERATOR_SGIX)");
            return;
         }
         break;
      case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
         if (ctx->Extensions.SGIX_shadow_ambient) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->ShadowAmbient = CLAMP(params[0], 0.0F, 1.0F);
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_SHADOW_AMBIENT_SGIX)");
            return;
         }
         break;
      case GL_GENERATE_MIPMAP_SGIS:
         if (ctx->Extensions.SGIS_generate_mipmap) {
            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
            texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)");
            return;
         }
         break;
      case GL_TEXTURE_COMPARE_MODE_ARB:
         if (ctx->Extensions.ARB_shadow) {
            const GLenum mode = (GLenum) params[0];
            if (mode == GL_NONE || mode == GL_COMPARE_R_TO_TEXTURE_ARB) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->CompareMode = mode;
            }
            else {
               _mesa_error(ctx, GL_INVALID_ENUM,
                           "glTexParameter(bad GL_TEXTURE_COMPARE_MODE_ARB: 0x%x)", mode);
               return;
            }
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_TEXTURE_COMPARE_MODE_ARB)");
            return;
         }
         break;
      case GL_TEXTURE_COMPARE_FUNC_ARB:
         if (ctx->Extensions.ARB_shadow) {
            const GLenum func = (GLenum) params[0];
            if (func == GL_LEQUAL || func == GL_GEQUAL) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->CompareFunc = func;
            }
            else if (ctx->Extensions.EXT_shadow_funcs &&
                     (func == GL_EQUAL ||
                      func == GL_NOTEQUAL ||
                      func == GL_LESS ||
                      func == GL_GREATER ||
                      func == GL_ALWAYS ||
                      func == GL_NEVER)) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->CompareFunc = func;
            }
            else {
               _mesa_error(ctx, GL_INVALID_ENUM,
                           "glTexParameter(bad GL_TEXTURE_COMPARE_FUNC_ARB)");
               return;
            }
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_TEXTURE_COMPARE_FUNC_ARB)");
            return;
         }
         break;
      case GL_DEPTH_TEXTURE_MODE_ARB:
         if (ctx->Extensions.ARB_depth_texture) {
            const GLenum result = (GLenum) params[0];
            if (result == GL_LUMINANCE || result == GL_INTENSITY
                || result == GL_ALPHA) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->DepthMode = result;
            }
            else {
               _mesa_error(ctx, GL_INVALID_ENUM,
                          "glTexParameter(bad GL_DEPTH_TEXTURE_MODE_ARB)");
               return;
            }
         }
         else {
            _mesa_error(ctx, GL_INVALID_ENUM,
                        "glTexParameter(pname=GL_DEPTH_TEXTURE_MODE_ARB)");
            return;
         }
         break;
      case GL_TEXTURE_LOD_BIAS:
         /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias*/
         if (ctx->Extensions.EXT_texture_lod_bias) {
            if (texObj->LodBias != params[0]) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
               texObj->LodBias = params[0];
            }
         }
         break;

      default:
         _mesa_error(ctx, GL_INVALID_ENUM,
                     "glTexParameter(pname=0x%x)", pname);
         return;
   }

   texObj->_Complete = GL_FALSE;

   if (ctx->Driver.TexParameter) {
      (*ctx->Driver.TexParameter)( ctx, target, texObj, pname, params );
   }
}


void GLAPIENTRY
_mesa_TexParameteri( GLenum target, GLenum pname, GLint param )
{
   GLfloat fparam[4];
   if (pname == GL_TEXTURE_PRIORITY)
      fparam[0] = INT_TO_FLOAT(param);
   else
      fparam[0] = (GLfloat) param;
   fparam[1] = fparam[2] = fparam[3] = 0.0;
   _mesa_TexParameterfv(target, pname, fparam);
}


void GLAPIENTRY
_mesa_TexParameteriv( GLenum target, GLenum pname, const GLint *params )
{
   GLfloat fparam[4];
   if (pname == GL_TEXTURE_BORDER_COLOR) {
      fparam[0] = INT_TO_FLOAT(params[0]);
      fparam[1] = INT_TO_FLOAT(params[1]);
      fparam[2] = INT_TO_FLOAT(params[2]);
      fparam[3] = INT_TO_FLOAT(params[3]);
   }
   else {
      if (pname == GL_TEXTURE_PRIORITY)
         fparam[0] = INT_TO_FLOAT(params[0]);
      else
         fparam[0] = (GLfloat) params[0];
      fparam[1] = fparam[2] = fparam[3] = 0.0F;
   }
   _mesa_TexParameterfv(target, pname, fparam);