gl

package
v2.1.0-alpha.4 Latest Latest
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 Go to latest Published: Nov 12, 2020 License: Apache-2.0, MIT Imports: 6 Imported by: 0

README

This is a fork of github.com/go-gl/gl/v2.1/gl with the below patch. This is now modified manually.

The original version is generated from github.com/hajimehoshi/glow's nocgo branch. This enables to remove dependencies on Cgo on Windows.

Now we are working on commiting this 'no-cgo' change to the official gl package. See https://github.com/go-gl/glow/pull/102.

Documentation

Overview

Package gl implements Go bindings to OpenGL.

Index

Constants

View Source 
const (
	VERTEX_SHADER        = 0x8B31
	FRAGMENT_SHADER      = 0x8B30
	ARRAY_BUFFER         = 0x8892
	ELEMENT_ARRAY_BUFFER = 0x8893
	DYNAMIC_DRAW         = 0x88E8
	STREAM_DRAW          = 0x88E0
	PIXEL_UNPACK_BUFFER  = 0x88EC
	SHORT                = 0x1402
	FLOAT                = 0x1406

	ZERO                = 0
	ONE                 = 1
	SRC_ALPHA           = 0x0302
	DST_ALPHA           = 0x0304
	ONE_MINUS_SRC_ALPHA = 0x0303
	ONE_MINUS_DST_ALPHA = 0x0305
	DST_COLOR           = 0x0306

	FALSE = 0
	TRUE  = 1

	BLEND                = 0x0BE2
	CLAMP_TO_EDGE        = 0x812F
	COLOR_ATTACHMENT0    = 0x8CE0
	COMPILE_STATUS       = 0x8B81
	FRAMEBUFFER          = 0x8D40
	FRAMEBUFFER_BINDING  = 0x8CA6
	FRAMEBUFFER_COMPLETE = 0x8CD5
	INFO_LOG_LENGTH      = 0x8B84
	LINK_STATUS          = 0x8B82
	MAX_TEXTURE_SIZE     = 0x0D33
	NEAREST              = 0x2600
	NO_ERROR             = 0
	READ_WRITE           = 0x88BA
	RGBA                 = 0x1908
	TEXTURE0             = 0x84C0
	TEXTURE_2D           = 0x0DE1
	TEXTURE_MAG_FILTER   = 0x2800
	TEXTURE_MIN_FILTER   = 0x2801
	TEXTURE_WRAP_S       = 0x2802
	TEXTURE_WRAP_T       = 0x2803
	TRIANGLES            = 0x0004
	SCISSOR_TEST         = 0x0C11
	UNPACK_ALIGNMENT     = 0x0CF5
	UNSIGNED_BYTE        = 0x1401
	UNSIGNED_SHORT       = 0x1403
	WRITE_ONLY           = 0x88B9
)

Variables

This section is empty.

Functions

func ActiveTexture 

func ActiveTexture(texture uint32)

func AttachShader 

func AttachShader(program uint32, shader uint32)

func BindAttribLocation 

func BindAttribLocation(program uint32, index uint32, name *uint8)

func BindBuffer 

func BindBuffer(target uint32, buffer uint32)

func BindFramebufferEXT 

func BindFramebufferEXT(target uint32, framebuffer uint32)

func BindTexture 

func BindTexture(target uint32, texture uint32)

func BlendFunc 

func BlendFunc(sfactor uint32, dfactor uint32)

func BufferData 

func BufferData(target uint32, size int, data unsafe.Pointer, usage uint32)

func BufferSubData 

func BufferSubData(target uint32, offset int, size int, data unsafe.Pointer)

func CheckFramebufferStatusEXT 

func CheckFramebufferStatusEXT(target uint32) uint32

func CompileShader 

func CompileShader(shader uint32)

func CreateProgram 

func CreateProgram() uint32

func CreateShader 

func CreateShader(xtype uint32) uint32

func DeleteBuffers 

func DeleteBuffers(n int32, buffers *uint32)

func DeleteFramebuffersEXT 

func DeleteFramebuffersEXT(n int32, framebuffers *uint32)

func DeleteProgram 

func DeleteProgram(program uint32)

func DeleteShader 

func DeleteShader(shader uint32)

func DeleteTextures 

func DeleteTextures(n int32, textures *uint32)

func DisableVertexAttribArray 

func DisableVertexAttribArray(index uint32)

func DrawElements 

func DrawElements(mode uint32, count int32, xtype uint32, indices uintptr)

func Enable 

func Enable(cap uint32)

func EnableVertexAttribArray 

func EnableVertexAttribArray(index uint32)

func Flush 

func Flush()

func FramebufferTexture2DEXT 

func FramebufferTexture2DEXT(target uint32, attachment uint32, textarget uint32, texture uint32, level int32)

func GenBuffers 

func GenBuffers(n int32, buffers *uint32)

func GenFramebuffersEXT 

func GenFramebuffersEXT(n int32, framebuffers *uint32)

func GenTextures 

func GenTextures(n int32, textures *uint32)

func GetDoublei_v 

func GetDoublei_v(target uint32, index uint32, data *float64)

func GetDoublei_vEXT 

func GetDoublei_vEXT(pname uint32, index uint32, params *float64)

func GetError 

func GetError() uint32

func GetFloati_v 

func GetFloati_v(target uint32, index uint32, data *float32)

func GetFloati_vEXT 

func GetFloati_vEXT(pname uint32, index uint32, params *float32)

func GetIntegeri_v 

func GetIntegeri_v(target uint32, index uint32, data *int32)

func GetIntegerui64i_vNV 

func GetIntegerui64i_vNV(value uint32, index uint32, result *uint64)

func GetIntegerv 

func GetIntegerv(pname uint32, data *int32)

func GetPointeri_vEXT 

func GetPointeri_vEXT(pname uint32, index uint32, params *unsafe.Pointer)

func GetProgramInfoLog 

func GetProgramInfoLog(program uint32, bufSize int32, length *int32, infoLog *uint8)

func GetProgramiv 

func GetProgramiv(program uint32, pname uint32, params *int32)

func GetShaderInfoLog 

func GetShaderInfoLog(shader uint32, bufSize int32, length *int32, infoLog *uint8)

func GetShaderiv 

func GetShaderiv(shader uint32, pname uint32, params *int32)

func GetTransformFeedbacki64_v 

func GetTransformFeedbacki64_v(xfb uint32, pname uint32, index uint32, param *int64)

func GetTransformFeedbacki_v 

func GetTransformFeedbacki_v(xfb uint32, pname uint32, index uint32, param *int32)

func GetUniformLocation 

func GetUniformLocation(program uint32, name *uint8) int32

func GetUnsignedBytei_vEXT 

func GetUnsignedBytei_vEXT(target uint32, index uint32, data *uint8)

func GetVertexArrayIntegeri_vEXT 

func GetVertexArrayIntegeri_vEXT(vaobj uint32, index uint32, pname uint32, param *int32)

func GetVertexArrayPointeri_vEXT 

func GetVertexArrayPointeri_vEXT(vaobj uint32, index uint32, pname uint32, param *unsafe.Pointer)

func GoStr 

func GoStr(cstr *uint8) string

GoStr takes a null-terminated string returned by OpenGL and constructs a corresponding Go string.

func Init 

func Init() error

Init initializes the OpenGL bindings by loading the function pointers (for each OpenGL function) from the active OpenGL context.

It must be called under the presence of an active OpenGL context, e.g., always after calling window.MakeContextCurrent() and always before calling any OpenGL functions exported by this package.

On Windows, Init loads pointers that are context-specific (and hence you must re-init if switching between OpenGL contexts, although not calling Init again after switching between OpenGL contexts may work if the contexts belong to the same graphics driver/device).

On macOS and the other POSIX systems, the behavior is different, but code written compatible with the Windows behavior is compatible with macOS and the other POSIX systems. That is, always Init under an active OpenGL context, and always re-init after switching graphics contexts.

For information about caveats of Init, you should read the "Platform Specific Function Retrieval" section of https://www.opengl.org/wiki/Load_OpenGL_Functions.

func InitWithProcAddrFunc 

func InitWithProcAddrFunc(getProcAddr func(name string) unsafe.Pointer) error

InitWithProcAddrFunc intializes the package using the specified OpenGL function pointer loading function.

For more cases Init should be used.

func IsFramebufferEXT 

func IsFramebufferEXT(framebuffer uint32) bool

func IsProgram 

func IsProgram(program uint32) bool

func IsTexture 

func IsTexture(texture uint32) bool

func LinkProgram 

func LinkProgram(program uint32)

func PixelStorei 

func PixelStorei(pname uint32, param int32)

func Ptr 

func Ptr(data interface{}) unsafe.Pointer

Ptr takes a slice or pointer (to a singular scalar value or the first element of an array or slice) and returns its GL-compatible address.

For example: 

var data []uint8
...
gl.TexImage2D(gl.TEXTURE_2D, ..., gl.UNSIGNED_BYTE, gl.Ptr(&data[0]))

func ReadPixels 

func ReadPixels(x int32, y int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer)

func RendererDeviceString 

func RendererDeviceString() string

func Scissor added in v2.1.0 

func Scissor(x int32, y int32, width int32, height int32)

func ShaderSource 

func ShaderSource(shader uint32, count int32, xstring **uint8, length *int32)

func Str 

func Str(str string) *uint8

Str takes a null-terminated Go string and returns its GL-compatible address. This function reaches into Go string storage in an unsafe way so the caller must ensure the string is not garbage collected.

func Strs 

func Strs(strs ...string) (cstrs **uint8, free func())

Strs takes a list of Go strings (with or without null-termination) and returns their C counterpart.

The returned free function must be called once you are done using the strings in order to free the memory.

If no strings are provided as a parameter this function will panic.

func TexImage2D 

func TexImage2D(target uint32, level int32, internalformat int32, width int32, height int32, border int32, format uint32, xtype uint32, pixels unsafe.Pointer)

func TexParameteri 

func TexParameteri(target uint32, pname uint32, param int32)

func TexSubImage2D 

func TexSubImage2D(target uint32, level int32, xoffset int32, yoffset int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer)

func Uniform1f 

func Uniform1f(location int32, v0 float32)

func Uniform1fv 

func Uniform1fv(location int32, count int32, value *float32)

func Uniform1i 

func Uniform1i(location int32, v0 int32)

func Uniform2fv 

func Uniform2fv(location int32, count int32, value *float32)

func Uniform3fv 

func Uniform3fv(location int32, count int32, value *float32)

func Uniform4fv 

func Uniform4fv(location int32, count int32, value *float32)

func UniformMatrix2fv 

func UniformMatrix2fv(location int32, count int32, transpose bool, value *float32)

func UniformMatrix3fv 

func UniformMatrix3fv(location int32, count int32, transpose bool, value *float32)

func UniformMatrix4fv 

func UniformMatrix4fv(location int32, count int32, transpose bool, value *float32)

func UseProgram 

func UseProgram(program uint32)

func VertexAttribPointer 

func VertexAttribPointer(index uint32, size int32, xtype uint32, normalized bool, stride int32, pointer uintptr)

func Viewport 

func Viewport(x int32, y int32, width int32, height int32)

Types

This section is empty.

Source Files

View all Source files

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