opengl

package
v0.2.6 Latest Latest
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 Go to latest Published: Dec 6, 2023 License: MIT Imports: 11 Imported by: 0

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Index

Constants

View Source 
const (
	UNSUPPORTED_GLYPH_ID = 0xffffffffffffffff // "Unsupported"
	UNDERCURL_GLYPH_ID   = 0xfffffffffffffffe // "Undercurl"
)

Variables

View Source 
var (
	//go:embed shaders/grid.vert
	ShaderSourceGridVert string
	//go:embed shaders/grid.geom
	ShaderSourceGridGeom string
	//go:embed shaders/grid.frag
	ShaderSourceGridFrag string
)

Embedded shader sources

Functions

This section is empty.

Types

type Atlas 

type Atlas struct {
	// contains filtered or unexported fields
}

func (*Atlas) BindTexture 

func (atlas *Atlas) BindTexture()

func (*Atlas) Destroy 

func (atlas *Atlas) Destroy()

func (*Atlas) FontKit 

func (atlas *Atlas) FontKit() *fontkit.FontKit

func (*Atlas) FontSize 

func (atlas *Atlas) FontSize() float64

func (*Atlas) GetCharPos 

func (atlas *Atlas) GetCharPos(char rune, bold, italic, underline, strikethrough bool, imgSize common.Vector2[int]) common.Rectangle[int]

func (*Atlas) ImageSize 

func (atlas *Atlas) ImageSize() common.Vector2[int]

func (*Atlas) Normalize 

func (atlas *Atlas) Normalize(pos common.Rectangle[int]) common.Rectangle[float32]

Normalization required when updating texture position to the gpu

func (*Atlas) Reset 

func (atlas *Atlas) Reset()

func (*Atlas) SetBoxDrawing 

func (atlas *Atlas) SetBoxDrawing(useBoxDrawing, useBlockDrawing bool)

func (*Atlas) SetFontKit 

func (atlas *Atlas) SetFontKit(kit *fontkit.FontKit)

func (*Atlas) SetFontSize 

func (atlas *Atlas) SetFontSize(fontSize, dpi float64)

func (*Atlas) String 

func (atlas *Atlas) String() string

func (*Atlas) Undercurl 

func (atlas *Atlas) Undercurl(imgSize common.Vector2[int]) (common.Rectangle[int], bool)

For the first time draws and caches undercurl image, returns image pos and true representing first time After that uses cached image and returns false

type Context 

type Context struct {
	// contains filtered or unexported fields
}

func New 

func New(getProcAddress func(name string) unsafe.Pointer) (*Context, error)

Call per window

func (*Context) ClearScreen 

func (context *Context) ClearScreen(c common.Color)

func (*Context) CreateTexture 

func (context *Context) CreateTexture(width, height int) Texture

func (*Context) CreateVertexBuffer 

func (context *Context) CreateVertexBuffer(size int) *VertexBuffer

func (*Context) Destroy 

func (context *Context) Destroy()

func (*Context) Flush 

func (context *Context) Flush()

func (*Context) Info 

func (context *Context) Info() ContextInfo

func (*Context) NewAtlas 

func (context *Context) NewAtlas(kit *fontkit.FontKit, size, dpi float64, useBoxDrawing, useBlockDrawing bool) *Atlas

func (*Context) SetViewport 

func (context *Context) SetViewport(rect common.Rectangle[int])

type ContextInfo 

type ContextInfo struct {
	Version                string
	Vendor                 string
	Renderer               string
	ShadingLanguageVersion string
	MaxTextureSize         int32
}

type Shader added in v0.2.5 

type Shader struct {
	ID   uint32
	Type ShaderType
}

func NewShaderFromSource added in v0.2.5 

func NewShaderFromSource(shader_type ShaderType, source string) *Shader

func (*Shader) Delete added in v0.2.5 

func (shader *Shader) Delete()

type ShaderProgram 

type ShaderProgram struct {
	ID uint32
	// contains filtered or unexported fields
}

func NewShaderProgram added in v0.2.5 

func NewShaderProgram(vert *Shader, geom *Shader, frag *Shader) *ShaderProgram

All shaders can be safely destroyed after program creation

func (ShaderProgram) Destroy 

func (program ShaderProgram) Destroy()

func (ShaderProgram) UniformLocation 

func (program ShaderProgram) UniformLocation(name string) int32

func (ShaderProgram) Use 

func (program ShaderProgram) Use()

type ShaderType added in v0.2.5 

type ShaderType uint32
const (
	VERTEX_SHADER   ShaderType = gl.VERTEX_SHADER
	GEOMETRY_SHADER ShaderType = gl.GEOMETRY_SHADER
	FRAGMENT_SHADER ShaderType = gl.FRAGMENT_SHADER
)

func (ShaderType) String added in v0.2.5 

func (st ShaderType) String() string

type Texture 

type Texture struct {
	// contains filtered or unexported fields
}

func (*Texture) Bind 

func (texture *Texture) Bind()

func (*Texture) Clear 

func (texture *Texture) Clear()

func (*Texture) Delete 

func (texture *Texture) Delete()

func (*Texture) Draw 

func (texture *Texture) Draw(image *image.RGBA, dest common.Rectangle[int])

Texture must bound before drawing

func (*Texture) Normalize 

func (texture *Texture) Normalize(pos common.Rectangle[int]) common.Rectangle[float32]

Converts coordinates to opengl understandable coordinates, 0 to 1

func (*Texture) Resize 

func (texture *Texture) Resize(width, height int)

Texture must bound before resizing

func (*Texture) Size 

func (texture *Texture) Size() common.Vector2[int]

func (Texture) String 

func (texture Texture) String() string

type Vertex 

type Vertex struct {
	// position of this vertex
	Pos common.Rectangle[float32] // layout 0
	// texture position
	Tex1 common.Rectangle[float32] // layout 1
	// second texture position used for multiwidth characters
	Tex2 common.Rectangle[float32] // layout 2
	// foreground color
	Fg common.Color // layout 3
	// background color
	Bg common.Color // layout 4
	// special color
	Sp common.Color // layout 5
}

func (Vertex) String 

func (vertex Vertex) String() string

type VertexBuffer 

type VertexBuffer struct {
	// contains filtered or unexported fields
}

func (*VertexBuffer) Bind 

func (buffer *VertexBuffer) Bind()

func (*VertexBuffer) CopyButPos 

func (buffer *VertexBuffer) CopyButPos(dst, src int)

func (*VertexBuffer) Destroy 

func (buffer *VertexBuffer) Destroy()

func (*VertexBuffer) Render 

func (buffer *VertexBuffer) Render()

Caller responsible to bind buffer Caller responsible to Flush

func (*VertexBuffer) Resize 

func (buffer *VertexBuffer) Resize(size int)

Resize should clear the buffer

func (*VertexBuffer) SetIndexBg 

func (buffer *VertexBuffer) SetIndexBg(index int, bg common.Color)

func (*VertexBuffer) SetIndexFg 

func (buffer *VertexBuffer) SetIndexFg(index int, fg common.Color)

func (*VertexBuffer) SetIndexPos 

func (buffer *VertexBuffer) SetIndexPos(index int, pos common.Rectangle[float32])

func (*VertexBuffer) SetIndexSp 

func (buffer *VertexBuffer) SetIndexSp(index int, sp common.Color)

func (*VertexBuffer) SetIndexTex1 

func (buffer *VertexBuffer) SetIndexTex1(index int, tex1 common.Rectangle[float32])

func (*VertexBuffer) SetIndexTex2 

func (buffer *VertexBuffer) SetIndexTex2(index int, tex2 common.Rectangle[float32])

func (*VertexBuffer) SetProjection 

func (buffer *VertexBuffer) SetProjection(rect common.Rectangle[float32])

func (*VertexBuffer) SetUndercurlRect 

func (buffer *VertexBuffer) SetUndercurlRect(rect common.Rectangle[float32])

func (*VertexBuffer) String 

func (buffer *VertexBuffer) String() string

func (*VertexBuffer) Update 

func (buffer *VertexBuffer) Update()

Updates current buffer to GPU Caller responsible to bind buffer

func (*VertexBuffer) VertexAt 

func (buffer *VertexBuffer) VertexAt(index int) Vertex

Source Files

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Directories

Path Synopsis
Package gl implements Go bindings to OpenGL.
 Package gl implements Go bindings to OpenGL.

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