Esempi in C++ (Cpp) per data_source_init_stream

Esempio n. 1

File: zfunc0.c Progetto: carriercomm/legacy

/* Finish building a FunctionType 0 (Sampled) function. */
int
gs_build_function_0(i_ctx_t *i_ctx_p, const ref *op, const gs_function_params_t * mnDR,
		    int depth, gs_function_t ** ppfn, gs_memory_t *mem)
{
    gs_function_Sd_params_t params;
    ref *pDataSource;
    int code;

    *(gs_function_params_t *) & params = *mnDR;
    params.Encode = 0;
    params.Decode = 0;
    params.Size = 0;
    if ((code = dict_find_string(op, "DataSource", &pDataSource)) <= 0)
	return (code < 0 ? code : gs_note_error(e_rangecheck));
    switch (r_type(pDataSource)) {
	case t_string:
	    data_source_init_string2(&params.DataSource,
				     pDataSource->value.const_bytes,
				     r_size(pDataSource));
	    break;
	case t_file: {
	    stream *s;

	    check_read_known_file_else(s, pDataSource, return_error,
				       return_error(e_invalidfileaccess));
	    if (!(s->modes & s_mode_seek))
		return_error(e_ioerror);
	    data_source_init_stream(&params.DataSource, s);
	    break;
	}
	default:
	    return_error(e_rangecheck);
    }
    if ((code = dict_int_param(op, "Order", 1, 3, 1, &params.Order)) < 0 ||
	(code = dict_int_param(op, "BitsPerSample", 1, 32, 0,
			       &params.BitsPerSample)) < 0 ||
	((code = fn_build_float_array(op, "Encode", false, true, &params.Encode, mem)) != 2 * params.m && (code != 0 || params.Encode != 0)) ||
	((code = fn_build_float_array(op, "Decode", false, true, &params.Decode, mem)) != 2 * params.n && (code != 0 || params.Decode != 0))
	) {
	goto fail;
    } {
	int *ptr = (int *)
	    gs_alloc_byte_array(mem, params.m, sizeof(int), "Size");

	if (ptr == 0) {
	    code = gs_note_error(e_VMerror);
	    goto fail;
	}
	params.Size = ptr;
	code = dict_ints_param(op, "Size", params.m, ptr);
	if (code != params.m)
	    goto fail;
    }
    code = gs_function_Sd_init(ppfn, &params, mem);
    if (code >= 0)
	return 0;
fail:
    gs_function_Sd_free_params(&params, mem);
    return (code < 0 ? code : gs_note_error(e_rangecheck));
}

Esempio n. 2

File: zshade.c Progetto: computersforpeace/ghostpdl

/* Collect parameters for a mesh shading. */
static int
build_mesh_shading(i_ctx_t *i_ctx_p, const ref * op,
                   gs_shading_mesh_params_t * params,
                   float **pDecode, gs_function_t ** pFunction,
                   gs_memory_t *mem)
{
    int code;
    float *data = 0;
    ref *pDataSource;

    *pDecode = 0;
    *pFunction = 0;
    if (dict_find_string(op, "DataSource", &pDataSource) <= 0)
        return_error(gs_error_rangecheck);
    if (r_is_array(pDataSource)) {
        uint size = r_size(pDataSource);

        data = (float *)gs_alloc_byte_array(mem, size, sizeof(float),
                                            "build_mesh_shading");
        if (data == 0)
            return_error(gs_error_VMerror);
        code = process_float_array(mem, pDataSource, size, data);
        if (code < 0) {
            gs_free_object(mem, data, "build_mesh_shading");
            return code;
        }
        data_source_init_floats(&params->DataSource, data, size);
    } else
        switch (r_type(pDataSource)) {
            case t_file: {
                stream *s;

                check_read_file(i_ctx_p, s, pDataSource);
                data_source_init_stream(&params->DataSource, s);
                break;
            }
            case t_string:
                check_read(*pDataSource);
                data_source_init_string2(&params->DataSource,
                                         pDataSource->value.bytes,
                                         r_size(pDataSource));
                break;
            default:
                return_error(gs_error_typecheck);
        }
    code = build_shading_function(i_ctx_p, op, pFunction, 1, mem, NULL);
    if (code < 0) {
        gs_free_object(mem, data, "build_mesh_shading");
        return code;
    }
    if (data_source_is_array(params->DataSource)) {
        params->BitsPerCoordinate = 0;
        params->BitsPerComponent = 0;
    } else {
        int num_decode = 4 +
            (*pFunction != 0 ? 1 :
             gs_color_space_num_components(params->ColorSpace)) * 2;

        if ((code = dict_int_param(op, "BitsPerCoordinate", 1, 32, 0,
                                   &params->BitsPerCoordinate)) >= 0 &&
            (code = dict_int_param(op, "BitsPerComponent", 1, 16, 0,
                                   &params->BitsPerComponent)) >= 0
            ) {
            *pDecode = (float *)
                gs_alloc_byte_array(mem, num_decode, sizeof(float),
                                    "build_mesh_shading");
            if (*pDecode == 0)
                code = gs_note_error(gs_error_VMerror);
            else {
                code = dict_floats_param(mem, op, "Decode", num_decode, *pDecode, NULL);
                if (code < 0) {
                    gs_free_object(mem, *pDecode, "build_mesh_shading");
                    *pDecode = 0;
                }
            }
        }
    }
    if (code < 0) {
        if (*pFunction != 0) {
            gs_function_free(*pFunction, true, mem);
            *pFunction = 0;
        }
        gs_free_object(mem, data, "build_mesh_shading");
    }
    return code;
}