SDL-cs GPU Examples

C# ports of TheSpydog's SDL_gpu_examples using SDL3-CS bindings.

Examples

Basics

• ClearScreen - Basic window with color clear
• ClearScreenMultiWindow - Multiple windows
• BasicTriangle - Triangle rendering with vertex/fragment shaders
• BasicVertexBuffer - Vertex buffer with color attributes

Texturing

• TexturedQuad - Textured quad with 6 sampler modes (point/linear/anisotropic, clamp/wrap)
• TexturedAnimatedQuad - Animated rotating textured quads with color multiply
• CustomSampling - Custom fragment shader sampling via storage textures
• Texture2DArray - 2D array texture rendering

Blitting

• BlitMirror - Texture blitting with horizontal/vertical flip modes
• GenerateMipmaps - Mipmap generation and mip level blitting
• Blit2DArray - Blitting 2D array textures with scaling
• BlitCube - Blitting cubemap textures

3D Rendering

• Cubemap - Cubemap texture sampling with 3D projection
• DepthSampler - Depth testing and depth texture sampling for post-process outline
• BasicStencil - Stencil buffer masking

Compute

• BasicCompute - Basic compute shader that fills a texture
• ComputeUniforms - Compute shader with uniform parameters
• ComputeSampler - Compute shader with texture sampling
• ComputeSpriteBatch - Compute-driven sprite batch rendering
• PullSpriteBatch - Vertex shader pulling from storage buffers (8192 sprites)

Advanced

• CullMode - GPU face culling modes (none/front/back, CW/CCW)
• InstancedIndexed - Instanced and indexed drawing
• DrawIndirect - GPU indirect draw commands
• TriangleMSAA - Multi-sample anti-aliasing with configurable sample counts
• WindowResize - Window resizing with GPU rendering
• Clear3DSlice - Clearing individual slices of a 3D texture
• CopyAndReadback - GPU buffer copy and CPU readback
• CopyConsistency - GPU copy operation consistency testing
• Latency - Input-to-output latency measurement

Building & Running

dotnet build
dotnet run --project SDL-cs_gpu_examples                   # Run all examples sequentially
dotnet run --project SDL-cs_gpu_examples -- BasicTriangle  # Run a specific example

Shader System

HLSL shader sources live in Content/Shaders/. At runtime, SDL ShaderCross compiles HLSL to SPIRV, then cross-compiles to the appropriate backend format (DXIL for D3D12, MSL for Metal, or SPIRV for Vulkan).