GLdc

Development of GLdc has moved to Gitlab

This is a partial implementation of OpenGL 1.2 for the SEGA Dreamcast for use with the KallistiOS SDK.

It began as a fork of libGL by Josh Pearson but has undergone a large refactor which is essentially a rewrite.

The aim is to implement as much of OpenGL 1.2 as possible, and to add additional features via extensions.

Things left to (re)implement:

• Spotlights (Trivial)
• Framebuffer extension (Trivial)
• Texture Matrix (Trivial)

Things I'd like to do:

• Use a clean "gl.h"
• Define an extension for modifier volumes
• Add support for point sprites
• Optimise, add unit tests for correctness

Compiling

GLdc uses CMake for its build system, it currently ships with two "backends":

• kospvr - This is the hardware-accelerated Dreamcast backend
• software - This is a stub software rasterizer used for testing testing and debugging

To compile a Dreamcast debug build, you'll want to do something like the following:

mkdir dcbuild
cd dcbuild
cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/Dreamcast.cmake -G "Unix Makefiles" ..
make

For a release build, replace the cmake line with with the following:

cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/Dreamcast.cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..

For a release build WITHOUT building samples and tests, enter the following:

cmake -DCMAKE_TOOLCHAIN_FILE=../toolchains/Dreamcast.cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DBUILD_SAMPLES=OFF -DBUILD_TESTS=OFF ..

You will need KallistiOS compiled and configured (e.g. the KOS_BASE environment variable must be set)

To compile for PC:

mkdir pcbuild
cd pcbuild
cmake -G "Unix Makefiles" ..
make

Special Thanks!

• Massive shout out to Hayden Kowalchuk for diagnosing and fixing a large number of bugs while porting GL Quake to the Dreamcast. Absolute hero!