Function alloc_image

Source/astcenccli_image.cpp:28–78

See header for documentation. */

/* See header for documentation. */
astcenc_image_ptr alloc_image(
	unsigned int bitness,
	unsigned int dim_x,
	unsigned int dim_y,
	unsigned int dim_z
) {
	astcenc_image_ptr img { new astcenc_image };

	// Initialize everything so that we can handle deletion of a partially
	// constructed object if new[] throws a bad_alloc exception
	img->dim_x = dim_x;
	img->dim_y = dim_y;
	img->dim_z = dim_z;
	img->data_type = ASTCENC_TYPE_U8;
	img->data = nullptr;

	// Ensure this is done as a size_t to avoid overflow - calling code has
	// checked that the product will fit in a size_t without overflowing.
	size_t plane_components = static_cast<size_t>(dim_x) * dim_y * 4;

	void** data = new void*[dim_z] {};
	img->data = data;

	if (bitness == 8)
	{
		img->data_type = ASTCENC_TYPE_U8;
		for (unsigned int z = 0; z < dim_z; z++)
		{
			data[z] = new uint8_t[plane_components];
		}
	}
	else if (bitness == 16)
	{
		img->data_type = ASTCENC_TYPE_F16;
		for (unsigned int z = 0; z < dim_z; z++)
		{
			data[z] = new uint16_t[plane_components];
		}
	}
	else // if (bitness == 32)
	{
		assert(bitness == 32);
		img->data_type = ASTCENC_TYPE_F32;
		for (unsigned int z = 0; z < dim_z; z++)
		{
			data[z] = new float[plane_components];
		}
	}

	return img;
}

/* See header for documentation. */
void astcenc_image_deleter::operator()(