Ultra-compact sprite rendering code with example frame animation logic. This release contains tech bits from the upcoming SuperNeo™ 2D game engine and includes anchor/pivot point, rotation, color filtering, alpha blending and built-in antialiased point sampling. As usual: complete, runnable single-function app. ~150 LOC. No modern C++, OOP or (other) obscuring cruft.

Sprites are rendered back-to-front (AKA "painter's algorithm") in the order they are submitted, as one draw call. The provided setup employs a single texture atlas containing all the sprite graphics.

The renderer is "immediate mode" in the sense that a fresh batch of sprite data (an array ofspritedesc entries specifying what textures to use, their position, scale, rotation etc) is uploaded every frame. The texture data itself is retained on the GPU.

ARGB filtering & alpha blending:

Custom antialiased point sampling that works for smooth sub-pixel movement, non-integer scaling and arbitrary rotation:

Sprite textures must be separated by at least a 1-pixel wide, fully transparent gap (0x00000000, but indicated in green here):

Anchor/pivot point:(0.0, 0.0) is top-left,(1.0, 1.0) is bottom-right, but can be set to anywhereinside or outside sprite:

The sprite'sposition corresponds to the position of the anchor point on screen, with the sprite texture aligned accordingly. Similarly,rotation andscale (including horizontal and vertical mirroring) are done around the anchor (pivot) point.

Theantialiasing technique used in this renderer requires premultiplied alpha textures.TexPrep is a small (~17 KB) commandline tool that can read most image formats, convert to premultiplied alpha and output as PNG, BMP, BIN orTXT.

Also seeMinimal D3D11 sprite renderer and the originalMinimal D3D11 reference for adjacent / elaborated example code.