Module: AsyncVips

Defined in:
lib/async_vips/version.rb,
ext/async_vips.c

Defined Under Namespace

Classes: Error, Image

Constant Summary collapse

VERSION = 
"1.2.2"
LIB_VERSION = 
av_version_string()

Class Method Summary collapse

Class Method Details

.debug_info ⇒ Object

Print internal debugging information from VIPS, including memory allocation information.



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# File 'ext/async_vips.c', line 22

static VALUE av_debug_info(VALUE self)
{
    vips_object_print_all();
    return Qnil;
}

.info(*args) ⇒ Object

Returns image information: width, height, file size



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# File 'ext/info.c', line 10

static VALUE av_info(int argc, VALUE *argv, VALUE self)
{
    rb_need_block();
    VALUE proc = rb_block_proc();

    VALUE rest;
    rb_scan_args(argc, argv, "*", &rest);

    VALUE params = rb_ary_pop(rest);
    VALUE tmp = rb_check_hash_type(params);
    if (NIL_P(tmp))
        rb_raise(rb_eArgError, "No info parameters specified");

    // Parse options
    VALUE load = rb_hash_aref(params, ID2SYM(av_i_id_load));
    if(NIL_P(load))
        rb_raise(rb_eArgError, "No image source specified: info(:load => 'image.jpg')");

    transform_data_t* tdata = av_make_transform_data_src(StringValuePtr(load));
    tdata->proc = proc;

    rb_gc_register_address(&tdata->proc);

    av_enqueue_task(av_build_image_thread_func, tdata);

    return self;
}

.set_cache(val) ⇒ Object

Set the max number of operations to keep in cache.



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# File 'ext/async_vips.c', line 29

static VALUE av_set_cache(VALUE self, VALUE val)
{
    vips_cache_set_max(NUM2INT(val));
    return Qnil;
}

.transform(*args) ⇒ Object

Image transformation



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# File 'ext/transform.c', line 334

static VALUE av_transform(int argc, VALUE *argv, VALUE self)
{
    rb_need_block();
    VALUE proc = rb_block_proc();

    VALUE rest;
    rb_scan_args(argc, argv, "*", &rest);

    VALUE params = rb_ary_pop(rest);
    VALUE tmp = rb_check_hash_type(params);
    if (NIL_P(tmp))
        rb_raise(rb_eArgError, "No transformation parameters specified");

    // Parse options
    VALUE load = rb_hash_aref(params, ID2SYM(av_t_id_load));
    if(NIL_P(load))
        rb_raise(rb_eArgError, "No image source specified: transform(:load => 'image.jpg')");

    VALUE save = rb_hash_aref(params, ID2SYM(av_t_id_save));
    if(NIL_P(save))
        rb_raise(rb_eArgError, "No image destination specified: transform(:save => 'output.jpg')");

    VALUE scale_x = rb_hash_aref(params, ID2SYM(av_t_id_scale_x));
    VALUE scale_y = rb_hash_aref(params, ID2SYM(av_t_id_scale_y));

    if(NIL_P(scale_x) && NIL_P(scale_y))
        rb_raise(rb_eArgError, "No scale width or height specified of the source image: transform(:scale_x => 800, :scale_y => 600)");

    if(NIL_P(scale_y))
        scale_y = scale_x;

    if(NIL_P(scale_x))
        scale_x = scale_y;

    VALUE natural_orient_flag = rb_hash_aref(params, ID2SYM(av_t_id_natural_orientation));
    if(!NIL_P(natural_orient_flag) &&
       (TYPE(natural_orient_flag) != T_TRUE) && (TYPE(natural_orient_flag) != T_FALSE))
        rb_raise(rb_eArgError, "Invalid natural orientation: transform(:natural_orientation => true|false)");

    transform_data_t* tdata = av_make_transform_data(StringValuePtr(load), StringValuePtr(save));
    tdata->target_width = NUM2INT(scale_x);
    tdata->target_height = NUM2INT(scale_y);
    tdata->natural_orientation = (TYPE(natural_orient_flag) == T_TRUE ? 1 : 0);
    tdata->proc = proc;

    rb_gc_register_address(&tdata->proc);

    av_enqueue_task(av_build_image_thread_func, tdata);

    return self;
}