https://github.com/hartwork/sdl_video_demo

Demos fast blitting of a video buffer to the screen with scaling while respecting aspect-ratio in C99 for both SDL 2 and SDL 1
https://github.com/hartwork/sdl_video_demo

blitting c c99 letterboxing rendering sdl sdl2 windowboxing

Last synced: 23 days ago
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Demos fast blitting of a video buffer to the screen with scaling while respecting aspect-ratio in C99 for both SDL 2 and SDL 1

• Host: GitHub
• URL: https://github.com/hartwork/sdl_video_demo
• Owner: hartwork
• License: gpl-3.0
• Created: 2022-12-19T17:24:06.000Z (about 2 years ago)
• Default Branch: master
• Last Pushed: 2024-10-28T23:59:19.000Z (3 months ago)
• Last Synced: 2024-12-30T21:51:41.609Z (about 1 month ago)
• Topics: blitting, c, c99, letterboxing, rendering, sdl, sdl2, windowboxing
• Language: C
• Homepage:
• Size: 1.73 MB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

        
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# SDL video demo (for both SDL 2 and SDL 1)

This repository demos fast blitting of a video buffer

to the screen with scaling while respecting aspect-ratio in C99.

There are two versions with ~70% identical code,

one for old SDL 1.x and one for current SDL 2.x.

It has been an explicit goal to allow holding

the two versions' code side by side easily,

e.g. using [Meld](https://meldmerge.org/),

and to be able to compare their performance.

The code is Software Libre licensed under GPL v3 or later.

Here's a quick 256 color recording of what to expect at runtime:

![Recording of sdl2_video_demo](recording.gif)

# Requirements

- SDL 2.x

- SDL 1.x (or sdl12-compat)

- sdl-gfx for SDL 1.x (not sdl2-gfx)

e.g.:

```console

# sudo apt install --no-install-recommends --yes -V \

    build-essential \

    libsdl1.2-dev \

    libsdl-gfx1.2-dev \

    libsdl2-dev

```

# Compilation

```console

# make CFLAGS='-O2 -pipe' -j

# ./sdl1_video_demo &

# ./sdl2_video_demo &

```

# Hotkeys

- f or F11 — toggle fullscreen

- q or ESC — exit