snippets

Documentation

Overview

Package snippets exposes functions for building simple GLES command streams.

Index

• type Builder
  • func NewBuilder(ctx context.Context, dev *device.Instance) *Builder
  • func (b *Builder) Add(cmds ...api.Cmd) api.CmdID
  • func (b *Builder) AddAttributeVec3(ctx context.Context, prog gles.ProgramId, name string) gles.AttributeLocation
  • func (b *Builder) AddUniformSampler(ctx context.Context, prog gles.ProgramId, name string) gles.UniformLocation
  • func (b *Builder) Capture(ctx context.Context, name string) *path.Capture
  • func (b *Builder) ClearBackbuffer(ctx context.Context) (red, green, blue, black api.CmdID)
  • func (b *Builder) ClearColor(red, green, blue, alpha gles.GLfloat) api.CmdID
  • func (b *Builder) ClearDepth() api.CmdID
  • func (b *Builder) CreateContext(width, height int, shared, preserveBuffersOnSwap bool) (eglContext, eglSurface, eglDisplay memory.Pointer)
  • func (b *Builder) CreateProgram(ctx context.Context, vertexShaderSource, fragmentShaderSource string) gles.ProgramId
  • func (b *Builder) Data(ctx context.Context, v ...interface{}) api.AllocResult
  • func (b *Builder) DrawTexturedSquare(ctx context.Context) (draw, swap api.CmdID)
  • func (b *Builder) Last() api.CmdID
  • func (b *Builder) ResizeBackbuffer(width, height int) api.CmdID
  • func (b *Builder) SwapBuffers() api.CmdID

Types

type Builder

type Builder struct {
	Cmds []api.Cmd
	CB   gles.CommandBuilder
	// contains filtered or unexported fields
}

Builder is used to build OpenGL ES command snippets.

func NewBuilder

func NewBuilder(ctx context.Context, dev *device.Instance) *Builder

NewBuilder returns a new builder.

func (*Builder) Add

func (b *Builder) Add(cmds ...api.Cmd) api.CmdID

Add appends cmds to the command list, returning the command identifier of the first added command.

func (*Builder) AddAttributeVec3

func (b *Builder) AddAttributeVec3(ctx context.Context, prog gles.ProgramId, name string) gles.AttributeLocation

AddAttributeVec3 adds a vec3 attribute to the given program.

func (*Builder) AddUniformSampler

func (b *Builder) AddUniformSampler(ctx context.Context, prog gles.ProgramId, name string) gles.UniformLocation

AddUniformSampler adds a sampler 2D uniform to the given program.

func (*Builder) Capture

func (b *Builder) Capture(ctx context.Context, name string) *path.Capture

Capture encodes and writes the command list to the database, returning an identifier to the newly constructed and stored Capture.

func (*Builder) ClearBackbuffer

func (b *Builder) ClearBackbuffer(ctx context.Context) (red, green, blue, black api.CmdID)

ClearBackbuffer returns the command list needed to sequentially clear the backbuffer to red, green, blue and black.

func (*Builder) ClearColor

func (b *Builder) ClearColor(red, green, blue, alpha gles.GLfloat) api.CmdID

ClearColor appends a the commands to clear the backbuffer with the given color.

func (*Builder) ClearDepth

func (b *Builder) ClearDepth() api.CmdID

ClearDepth appends a the commands to clear the backbuffer depth map.

func (*Builder) CreateContext

func (b *Builder) CreateContext(width, height int, shared, preserveBuffersOnSwap bool) (eglContext, eglSurface, eglDisplay memory.Pointer)

CreateContext appends the commands to create a new EGL context with the given parameters.

func (*Builder) CreateProgram

func (b *Builder) CreateProgram(ctx context.Context,
	vertexShaderSource, fragmentShaderSource string) gles.ProgramId

CreateProgram appends the commands to create and link a new program.

func (*Builder) Data

func (b *Builder) Data(ctx context.Context, v ...interface{}) api.AllocResult

Data allocates memory for the given values.

func (*Builder) DrawTexturedSquare

func (b *Builder) DrawTexturedSquare(ctx context.Context) (draw, swap api.CmdID)

DrawTexturedSquare returns the command list needed draw a textured square.

func (*Builder) Last

func (b *Builder) Last() api.CmdID

Last returns the command identifier of the last added command.

func (*Builder) ResizeBackbuffer

func (b *Builder) ResizeBackbuffer(width, height int) api.CmdID

ResizeBackbuffer appends the commands to resize the backbuffer to the given dimensions.

func (*Builder) SwapBuffers

func (b *Builder) SwapBuffers() api.CmdID

SwapBuffers appends a call to eglSwapBuffers.