agb/CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Custom allocator support using the Allocator trait for HashMap. This means the HashMap can be used with InternalAllocator to allocate to IWRAM or the ExternalAllocator to explicitly allocate to EWRAM.
• Support for using windows on the GBA. Windows are used to selectively enable rendering of certain layers or effects.
• Support for the blend mode of the GBA. Blending allows for alpha blending between layers and fading to black and white.
• Added a new agb::sync module that contains GBA-specific synchronization primitives.
• Added support for save files.
• Added implementation of HashMap.retain().
• Added support for affine backgrounds (tiled modes 1 and 2) which allows for scaling, rotating etc of tiled backgrounds.
• Added support for 256 colour backgrounds (when working with affine ones).

Changes

• Many of the places that originally disabled IRQs now use the sync module, reducing the chance of missed interrupts.
• HashMap iterators now implement size_hint which should result in slightly better generation of code using those iterators.
• Transparency of backgrounds is now set once in the toml file rather than once for every image.
• Palette generation now takes into account every single background a toml definition rather than one at a time, you can now find it in the PALETTES constant rather than in every individual image.
• Sound frequency is no longer a crate feature, instead set when initialising the sound mixer.

Fixed

• Fixed the fast magnitude function in agb_fixnum. This is also used in fast_normalise. Previously only worked for positive (x, y).
• Fixed formatting of fixed point numbers in the range (-1, 0), which previously appeared positive.

Changed

• testing is now a default feature, so you no longer need to add a separate dev-dependencies line for agb in order to enable unit tests for your project.

[0.11.1] - 2022/08/02

Version 0.11.1 brings documentation for fixed point numbers. We recommend all users upgrade to this version since it also includes fixes to a few functions in fixnum. See changed section for breaking changes.

Added

• Support for sprites that are not square.
• Docs for fixed point numbers.

Changed

• Rect::contains_point now considers points on the boundary to be part of the rectangle.
• Signature of Rect::overlapping_rect changed to return an Option. Returns None if rectangles don't overlap.

Fixed

• Fixed point sine calculates the sine correctly.

[0.10.0] - 2022/07/31

Version 0.10.0 brings about many new features. As with most agb upgrades, you will need to update your gba.ld and gba_mb.ld files which you can find in the template repo. We would also recommend copying the [profile.dev] and [profile.release] sections from Cargo.toml if you don't have these values already.

Added

• Hyperspace roll, a new game built for the GMTK Game Jam 2022 using agb. The source code can be found in the examples directory.
• Started using GitHub discussions as a forum
• Many functions previously undocumented are now documented
• Z-Ordering of sprites - you can now change the render order of sprites rather than it just being defined by the order in which they appear in object memory
• 32kHz audio. Probably the best sound quality you'll get out of the hardware, but uses a lot of ROM space
• Transparent sprite support with aseprite
• You can now write tests for projects depending on agb
• Very basic font rendering - looking for feedback, this API is far from stable
• Faster implementation of memcpy and memset thanks to the agbabi crate which provide a big performance boost for any project using agb
• If you wish, you can now optionally do dynamic memory allocation to IWRAM instead of only EWRAM
• You can now use 64x64px sprites
• You can now configure the background size for tiled backgrounds
• It is possible to create 'dynamic tiles' for backgrounds. These are tiles which are defined at runtime
• Random number generator in agb::rng

Changed

• Audio system optimisations - reduced CPU usage by more than 50%
• Background tiles are now removed from Video RAM during commit() if they are no longer used rather than immediately reducing flickering
• Improved the README for both the main agb crate and the template
• The template now builds with optimisations in debug mode and debug symbols in release mode
• Added #[must_use] to many of the places it is needed
• All subcrates get released at once, so versions are kept in lockstep
• A few methods accepting Num<..> have been changed to accept impl Into<Num<..>> to make them easier to use

Removed

• The ability to use timer0 and timer1 through the timer module. This was done in order to fully support 32kHz audio

Fixed

• Sprite data is now correctly aligned so fast copies will always work
• A few methods which should really be internal have had pub removed
• The crate now compiles (but does not run) doctests in CI which pointed out a large number of non-compiling examples