gfx: Fix pkg-config name which should be SDL2_gfx instead of sdl2_gfx

Signed-off-by: Lilis Iskandar <[email protected]>

gfx: Update pkg-config to use sdl2_gfx instead of sdl2

Signed-off-by: Lilis Iskandar <[email protected]>

.github/workflows: Update test-build.yml to use SDL2 2.30.0

Signed-off-by: Lilis Iskandar <[email protected]>

img: add LoadSizedSVGRW() and custom LoadSizedSVG() functions

Signed-off-by: Lilis Iskandar <[email protected]>

Backport commit 62457e6 sdl: add missing HINT_VIDEODRIVER hint (#588)

Signed-off-by: Lilis Iskandar <[email protected]>

sdl/audio: fix AudioStream.Available() returning error instead of int

Signed-off-by: Lilis Iskandar <[email protected]>

Align colors in SDL package to Go specification (#581)

* sdl/surface: handle colors correctly in Surface.Set method

* sdl/pixels: fix color models

* sdl/surface: handle RGBA correctly in Surface.At method

* sdl/pixels: make sdl.Color be of type color.NRGBA

* sdl/struct_test: fix compilation issue in sdl package

* sdl/pixels: improve binary upscale/downscale precision

sdl: handle adaptive vsync (-1) in GLGetSwapInterval (#568)

Fix `go get -u` failing when GONOPROXY or GONOSUMDB is set

This is done by renaming .go-sdl2-libs to _libs.

Signed-off-by: Lilis Iskandar <[email protected]>

Update README.md with instructions on building static executable for …

…macOS M1 inside a Linux container

Signed-off-by: Lilis Iskandar <[email protected]>