When rendering directly to the output buffer, we need to maintain the
state of what has been drawn and what needs redrawing per-buffer.
We previously tried to do it implicitly by checking `SDL_DOUBLEBUF` and
other flags. The previous implementation was broken in several
ways, resulting in rendering issues on devices that support 8-bit output
directly.
Changes this mechanism to explicitly maintain buffer state per output
buffer. The new mechanism doesn't require knowledge of the number of
buffers, and thus also works correctly with triple-buffering.
Fixes#5447
This variable is controlled/set by the code in that file, this also lets other files have more specific/relevant includes instead of the monolith that is diablo.h
Set the video mode close to the SVid resolution while preserving aspect ratio.
Restore the video mode once the video has finished playing.
Also avoids allocating a tmp surface unless scaling.
Only some handheld devices support auto-scaling.
On desktop and some handhelds we need to downscale manually.
Hardware auto-scaler check for jz4760 provided by @jbanes and @scooterpsu
* Get a fresh window surface before rendering to it
It is possible that a window surface gets invalidated since we initially
obtained it. We need to call GetWindowSurface every time we want one,
instead of keeping a pointer to a possibly stale one.
See https://hg.libsdl.org/SDL/file/369b01006eb2/src/video/SDL_video.c#l2312Fixes#351
Adds a USE_SDL1 build option to use SDL v1 instead of v2.
This is useful for porting Diablo on devices that don't support SDL2,
such as the RetroFW / OpenDingux devices (e.g. RG300 Retro Gaming Handheld)
Not yet supported:
* Fullscreen
* Upscaling
* Audio
Gleb Mazovetskiy
ephphatha
Bubio
Anders Jenbo
Vladimir Olteanu
qndel
Juliano Leal Goncalves