grr!

A bare metal library for OpenGL 4.5+

toml [dependencies] grr = "0.6"

grr aims at providing a thin layer above OpenGL 4.5+, exposing a modern API orientated on Vulkan. The sole purpose of the library is to have a cleaned up API for fast prototyping.

Features

• API is built around direct state access
• Following Vulkan terminology and function names
• Only provided latest GL functionality
• Enforce sRGB framebuffer handling

Getting started

Checkout our Hello Triangle example to see the library in action!

Example

```rust // Bind graphics pipeline (shaders) grr.bindpipeline(&pipeline); // Configure vertex attributes grr.bindvertexarray(&vertexarray); // Bind vertex buffers for fetching attribute data grr.bindvertexbuffers( &vertexarray, 0, &[grr::VertexBufferView { buffer: &triangledata, offset: 0, stride: (std::mem::sizeof::() * 5) as _, inputrate: grr::InputRate::Vertex, }] );

// Clear default framebuffer grr.clear_attachment(grr::Framebuffer::DEFAULT, grr::ClearAttachment::ColorFloat(0, [0.5, 0.5, 0.5, 1.0])); // Draw triangles grr.draw(grr::Primitive::Triangles, 0..3, 0..1);

// Present on screen! window.swap_buffers().unwrap(); ```

Examples

Hello Triangle

cargo run --example triangle

Device Information

cargo run --example device

Texture (Logo)

cargo run --example texture

(Maybe-)Physically-based Rendering (IBL)

Assets (model and HDRI) need to be extracted into examples/assets before running it!

cargo run --example pbr --release

• Example ported from/based on the PBR tutorial from https://learnopengl.com/ (CC BY-NC 4.0).
• Cerberus model by Andrew Maximov (https://artisaverb.info/Cerberus.html)
• Popcorn Lobby HDRI from sIBL Archive (http://www.hdrlabs.com/sibl/archive.html)