Class CvMat

resources/oidscripts/oidtypes/opencv.py:83–135

Implementation for inspecting OpenCV CvMat structs

        return re.match(type_regex, symbol_type) is not None

class CvMat(interface.TypeInspectorInterface):
    """
    Implementation for inspecting OpenCV CvMat structs
    """
    def get_buffer_metadata(self, obj_name, picked_obj, debugger_bridge):
        data = picked_obj['data']
        if data.type == 'CvMat::(unnamed union)':
            data = data[0]
        buffer = debugger_bridge.get_casted_pointer('char', data)
        if buffer == 0x0:
            raise RuntimeError('Received null buffer!')

        width = int(picked_obj['cols'])
        height = int(picked_obj['rows'])
        flags = int(picked_obj['type'])

        channels = ((((flags) & CV_MAT_CN_MASK) >> CV_CN_SHIFT) + 1)
        row_stride = int(int(picked_obj['step'])/channels)

        if channels >= 3:
            pixel_layout = 'bgra'
        else:
            pixel_layout = 'rgba'

        cvtype = ((flags) & CV_MAT_TYPE_MASK)

        type_value = (cvtype & 7)

        if (type_value == symbols.OID_TYPES_UINT16 or
            type_value == symbols.OID_TYPES_INT16):
            row_stride = int(row_stride / 2)
        elif (type_value == symbols.OID_TYPES_INT32 or
              type_value == symbols.OID_TYPES_FLOAT32):
            row_stride = int(row_stride / 4)
        elif type_value == symbols.OID_TYPES_FLOAT64:
            row_stride = int(row_stride / 8)

        return {
            'display_name': f'{obj_name} ({picked_obj.type})',
            'pointer': buffer,
            'width': width,
            'height': height,
            'channels': channels,
            'type': type_value,
            'row_stride': row_stride,
            'pixel_layout': pixel_layout,
            'transpose_buffer': False
        }

    def is_symbol_observable(self, symbol, symbol_name):
        symbol_type = str(symbol.type)
        type_regex = r'(const\s+)?CvMat(\s+?[*&])?'
        return re.match(type_regex, symbol_type) is not None


class IplImage(interface.TypeInspectorInterface):