driver

type API interface {
	// contains filtered or unexported methods
}

type AccessBits uint8

type BlendFactor uint8

type Buffer interface {
	Release()
	Upload(data []byte)
	Download(data []byte) error
}

type BufferBinding uint8

type Caps struct {
	// BottomLeftOrigin is true if the driver has the origin in the lower left
	// corner. The OpenGL driver returns true.
	BottomLeftOrigin bool
	Features         Features
	MaxTextureSize   int
}

type DataType uint8

type DepthFunc uint8

type Device interface {
	BeginFrame(clear bool, viewport image.Point) Framebuffer
	EndFrame()
	Caps() Caps
	NewTimer() Timer
	// IsContinuousTime reports whether all timer measurements
	// are valid at the point of call.
	IsTimeContinuous() bool
	NewTexture(format TextureFormat, width, height int, minFilter, magFilter TextureFilter, bindings BufferBinding) (Texture, error)
	NewFramebuffer(tex Texture, depthBits int) (Framebuffer, error)
	NewImmutableBuffer(typ BufferBinding, data []byte) (Buffer, error)
	NewBuffer(typ BufferBinding, size int) (Buffer, error)
	NewComputeProgram(shader ShaderSources) (Program, error)
	NewProgram(vertexShader, fragmentShader ShaderSources) (Program, error)
	NewInputLayout(vertexShader ShaderSources, layout []InputDesc) (InputLayout, error)

	DepthFunc(f DepthFunc)
	ClearDepth(d float32)
	Clear(r, g, b, a float32)
	Viewport(x, y, width, height int)
	DrawArrays(mode DrawMode, off, count int)
	DrawElements(mode DrawMode, off, count int)
	SetBlend(enable bool)
	SetDepthTest(enable bool)
	DepthMask(mask bool)
	BlendFunc(sfactor, dfactor BlendFactor)

	BindInputLayout(i InputLayout)
	BindProgram(p Program)
	BindFramebuffer(f Framebuffer)
	BindTexture(unit int, t Texture)
	BindVertexBuffer(b Buffer, stride, offset int)
	BindIndexBuffer(b Buffer)
	BindImageTexture(unit int, texture Texture, access AccessBits, format TextureFormat)

	MemoryBarrier()
	DispatchCompute(x, y, z int)

	Release()
}

type Direct3D11 struct {
	// Device contains a *ID3D11Device.
	Device unsafe.Pointer
}

type DrawMode uint8

type Features uint

type Framebuffer interface {
	Invalidate()
	Release()
	ReadPixels(src image.Rectangle, pixels []byte) error
}

type InputDesc struct {
	Type DataType
	Size int

	Offset int
}

type InputLayout interface {
	Release()
}

type InputLocation struct {
	// For GLSL.
	Name     string
	Location int
	// For HLSL.
	Semantic      string
	SemanticIndex int

	Type DataType
	Size int
}

type OpenGL struct {
	// ES forces the use of ANGLE OpenGL ES libraries on macOS. It is
	// ignored on all other platforms.
	ES bool
	// Context contains the WebGL context for WebAssembly platforms. It is
	// empty for all other platforms; an OpenGL context is assumed current when
	// calling NewDevice.
	Context gl.Context
}

type Program interface {
	Release()
	SetStorageBuffer(binding int, buf Buffer)
	SetVertexUniforms(buf Buffer)
	SetFragmentUniforms(buf Buffer)
}

type ShaderSources struct {
	Name      string
	GLSL100ES string
	GLSL300ES string
	GLSL310ES string
	GLSL130   string
	GLSL150   string
	HLSL      string
	Uniforms  UniformsReflection
	Inputs    []InputLocation
	Textures  []TextureBinding
}

type Texture interface {
	Upload(offset, size image.Point, pixels []byte)
	Release()
}

type TextureBinding struct {
	Name    string
	Binding int
}

type TextureFilter uint8

type TextureFormat uint8

type Timer interface {
	Begin()
	End()
	Duration() (time.Duration, bool)
	Release()
}

type UniformBlock struct {
	Name    string
	Binding int
}

type UniformLocation struct {
	Name   string
	Type   DataType
	Size   int
	Offset int
}

type UniformsReflection struct {
	Blocks    []UniformBlock
	Locations []UniformLocation
	Size      int
}