sdl2.ext.image - Importing and Exporting Image Files¶
The sdl2.ext.image
module provides some simple functions for importing
images as SDL surfaces and exporting SDL surfaces to image files.
The basic functions load_bmp()
and save_bmp()
load and save BMP
files, and are guaranteed to be available on all systems supported by PySDL2.
The load_img()
function can be used to import additional image formats
(e.g. JPEG, PNG), but requires that the SDL_image library is installed on
the target system (can be installed as a Python dependency with pysdl2-dll
on platforms that support it).
In addition to importing images from files, this module also provides the
pillow_to_surface()
function for converting Image
objects from the
Pillow Python library to SDL
surfaces.
-
sdl2.ext.image.
load_bmp
(path)[source]¶ Imports a BMP (bitmap image) file as an SDL surface.
Because BMP importing and exporting is part of the core SDL2 library, this function is guaranteed to be available on all platforms and installations that support PySDL2.
Parameters: path (str) – The relative (or absolute) path to the BMP image to import. Returns: An SDL surface containing the imported image. Return type: SDL_Surface
-
sdl2.ext.image.
save_bmp
(source, path, overwrite=False)[source]¶ Exports an SDL surface to a BMP (bitmap image) file.
Because BMP importing and exporting is part of the core SDL2 library, this function is guaranteed to be available on all platforms and installations that support PySDL2.
Parameters:
-
sdl2.ext.image.
load_img
(path, as_argb=True)[source]¶ Imports an image file as an SDL surface using the SDL_image library.
This function supports a wide range of image formats, including GIF, BMP, JPEG, PNG, TIFF, and WebP. For a full list, consult the SDL_image documentation.
By default, this function also converts the imported surface to 32-bit ARGB format for consistency across functions and better compatibility with SDL2 renderers. To disable ARGB conversion, set the
as_argb
parameter toFalse
.Note
Because SDL_image is not part of the core SDL2 library, this function will only work on systems where the SDL_image library is installed. Additionally, support for PNG, JPEG, TIFF, and WebP in SDL_image is dynamic and are not guaranteed to be available on all systems.
Parameters: Returns: An SDL surface containing the imported image.
Return type: SDL_Surface
-
sdl2.ext.image.
load_svg
(path, width=0, height=0, as_argb=True)[source]¶ Loads an SVG image at a given resolution, preserving aspect ratio.
Only one dimension (height or width) will have any effect on a given image as the aspect ratio will always be preserved (e.g. setting an output size of 200x150 on a 100x100 SVG will result in a 200x200 surface).
If both dimensions are specified, whichever one results in a larger output surface will be used. If neither height or width are specified, the SVG will be loaded at its original internal resolution.
Note
SVG support in SDL2_image is currently focused on simple images and does not support font rendering. More complex or modern SVG files may not render correctly.
Note: This function requires SDL2_image 2.6.0 or newer.
Parameters: - path (str) – The relative (or absolute) path to the image to import.
- width (int, optional) – The width (in pixels) at which to load the SVG.
- height (int, optional) – The height (in pixels) at which to load the SVG.
- as_argb (bool, optional) – Whether the obtained surface should be
converted to 32-bit ARGB pixel format or left as-is. Defaults to
True
(convert to ARGB).
Returns: An SDL surface containing the imported SVG.
Return type: SDL_Surface
-
sdl2.ext.image.
pillow_to_surface
(img, as_argb=True)[source]¶ Converts a
PIL.Image.Image
object to an SDL surface.This function returns a copy of the original object’s pixel data, meaning that the original Image can be modified or deleted without affecting the returned surface (and vice versa).
By default, this function also converts the surface to 32-bit ARGB format for consistency across functions and better compatibility with SDL2 renderers. To disable ARGB conversion, set the
as_argb
parameter toFalse
.Parameters: - img (
PIL.Image.Image
) – The Image object to convert to an SDL surface. - as_argb (bool, optional) – Whether the obtained surface should be
converted to 32-bit ARGB pixel format or left as-is. Defaults to
True
(convert to ARGB).
Returns: An SDL surface copy of the PIL image.
Return type: SDL_Surface
- img (
-
sdl2.ext.image.
load_image
(fname, enforce=None)[source]¶ [Deprecated] Imports an image file as an SDL surface.
This function uses either the SDL_image library or the Pillow Python package for importing images, using SDL2’s built-in BMP loader as a fall-back if neither are available.
Warning
Due to a long-standing bug, the resulting image surfaces can have different pixel formats depending on which backend was used, making behavior unpredictable across different systems. As such this function is deprecated, and is only maintained to avoid breaking existing code. For new projects, the
load_bmp()
,load_img()
, and/orpillow_to_surface()
functions should be used instead.Parameters: Returns: An SDL surface containing the imported image.
Return type: SDL_Surface