263 lines
9.8 KiB
Go
263 lines
9.8 KiB
Go
package glimplios
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// #include <stdlib.h>
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// #include <OpenGLES/ES2/gl.h>
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// #cgo ios LDFLAGS: -framework OpenGLES
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import "C"
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import (
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"fmt"
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"reflect"
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"unsafe"
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"github.com/tfriedel6/canvas"
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)
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type GLImpl struct{}
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var _ canvas.GL = GLImpl{}
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func (GLImpl) Ptr(data interface{}) unsafe.Pointer {
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if data == nil {
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return unsafe.Pointer(nil)
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}
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var addr unsafe.Pointer
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v := reflect.ValueOf(data)
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switch v.Type().Kind() {
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case reflect.Ptr:
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e := v.Elem()
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switch e.Kind() {
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case
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reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
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reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
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reflect.Float32, reflect.Float64:
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addr = unsafe.Pointer(e.UnsafeAddr())
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default:
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panic(fmt.Errorf("unsupported pointer to type %s; must be a slice or pointer to a singular scalar value or the first element of an array or slice", e.Kind()))
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}
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case reflect.Uintptr:
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addr = unsafe.Pointer(v.Pointer())
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case reflect.Slice:
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addr = unsafe.Pointer(v.Index(0).UnsafeAddr())
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default:
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panic(fmt.Errorf("unsupported type %s; must be a slice or pointer to a singular scalar value or the first element of an array or slice", v.Type()))
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}
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return addr
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}
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func (GLImpl) ActiveTexture(texture uint32) {
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C.glActiveTexture(C.GLenum(texture))
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}
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func (GLImpl) AttachShader(program uint32, shader uint32) {
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C.glAttachShader(C.GLuint(program), C.GLuint(shader))
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}
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func (GLImpl) BindBuffer(target uint32, buffer uint32) {
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C.glBindBuffer(C.GLenum(target), C.GLuint(buffer))
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}
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func (GLImpl) BindFramebuffer(target uint32, framebuffer uint32) {
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C.glBindFramebuffer(C.GLenum(target), C.GLuint(framebuffer))
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}
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func (GLImpl) BindRenderbuffer(target uint32, renderbuffer uint32) {
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C.glBindRenderbuffer(C.GLenum(target), C.GLuint(renderbuffer))
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}
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func (GLImpl) BindTexture(target uint32, texture uint32) {
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C.glBindTexture(C.GLenum(target), C.GLuint(texture))
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}
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func (GLImpl) BlendFunc(sfactor uint32, dfactor uint32) {
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C.glBlendFunc(C.GLenum(sfactor), C.GLenum(dfactor))
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}
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func (GLImpl) BufferData(target uint32, size int, data unsafe.Pointer, usage uint32) {
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C.glBufferData(C.GLenum(target), C.GLsizeiptr(size), data, C.GLenum(usage))
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}
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func (GLImpl) CheckFramebufferStatus(target uint32) uint32 {
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return uint32(C.glCheckFramebufferStatus(C.GLenum(target)))
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}
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func (GLImpl) Clear(mask uint32) {
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C.glClear(C.GLbitfield(mask))
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}
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func (GLImpl) ClearColor(red float32, green float32, blue float32, alpha float32) {
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C.glClearColor(C.GLfloat(red), C.GLfloat(green), C.GLfloat(blue), C.GLfloat(alpha))
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}
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func (GLImpl) ColorMask(red bool, green bool, blue bool, alpha bool) {
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var r, g, b, a C.GLboolean
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if red {
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r = 1
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}
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if green {
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g = 1
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}
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if blue {
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b = 1
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}
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if alpha {
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a = 1
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}
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C.glColorMask(r, g, b, a)
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}
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func (GLImpl) CompileShader(shader uint32) {
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C.glCompileShader(C.GLuint(shader))
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}
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func (GLImpl) CreateProgram() uint32 {
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return uint32(C.glCreateProgram())
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}
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func (GLImpl) CreateShader(xtype uint32) uint32 {
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return uint32(C.glCreateShader(C.GLenum(xtype)))
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}
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func (GLImpl) DeleteShader(shader uint32) {
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C.glDeleteShader(C.GLuint(shader))
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}
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func (GLImpl) DeleteFramebuffers(n int32, framebuffers *uint32) {
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C.glDeleteFramebuffers(C.GLsizei(n), (*C.GLuint)(framebuffers))
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}
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func (GLImpl) DeleteRenderbuffers(n int32, renderbuffers *uint32) {
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C.glDeleteRenderbuffers(C.GLsizei(n), (*C.GLuint)(renderbuffers))
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}
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func (GLImpl) DeleteTextures(n int32, textures *uint32) {
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C.glDeleteTextures(C.GLsizei(n), (*C.GLuint)(textures))
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}
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func (GLImpl) Disable(cap uint32) {
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C.glDisable(C.GLenum(cap))
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}
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func (GLImpl) DisableVertexAttribArray(index uint32) {
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C.glDisableVertexAttribArray(C.GLuint(index))
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}
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func (GLImpl) DrawArrays(mode uint32, first int32, count int32) {
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C.glDrawArrays(C.GLenum(mode), C.GLint(first), C.GLsizei(count))
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}
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func (GLImpl) Enable(cap uint32) {
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C.glEnable(C.GLenum(cap))
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}
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func (GLImpl) EnableVertexAttribArray(index uint32) {
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C.glEnableVertexAttribArray(C.GLuint(index))
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}
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func (GLImpl) FramebufferRenderbuffer(target uint32, attachment uint32, renderbuffertarget uint32, renderbuffer uint32) {
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C.glFramebufferRenderbuffer(C.GLenum(target), C.GLenum(attachment), C.GLenum(renderbuffertarget), C.GLuint(renderbuffer))
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}
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func (GLImpl) FramebufferTexture(target uint32, attachment uint32, texture uint32, level int32) {
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C.glFramebufferTexture2D(C.GLenum(target), C.GLenum(attachment), C.GL_TEXTURE_2D, C.GLuint(texture), C.GLint(level))
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}
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func (GLImpl) GenBuffers(n int32, buffers *uint32) {
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C.glGenBuffers(C.GLsizei(n), (*C.GLuint)(buffers))
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}
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func (GLImpl) GenFramebuffers(n int32, framebuffers *uint32) {
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C.glGenFramebuffers(C.GLsizei(n), (*C.GLuint)(framebuffers))
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}
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func (GLImpl) GenRenderbuffers(n int32, renderbuffers *uint32) {
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C.glGenRenderbuffers(C.GLsizei(n), (*C.GLuint)(renderbuffers))
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}
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func (GLImpl) GenTextures(n int32, textures *uint32) {
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C.glGenTextures(C.GLsizei(n), (*C.GLuint)(textures))
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}
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func (GLImpl) GenerateMipmap(target uint32) {
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C.glGenerateMipmap(C.GLenum(target))
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}
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func (GLImpl) GetAttribLocation(program uint32, name string) int32 {
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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return int32(C.glGetAttribLocation(C.GLuint(program), (*C.GLchar)(cname)))
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}
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func (GLImpl) GetError() uint32 {
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return uint32(C.glGetError())
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}
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func (GLImpl) GetProgramInfoLog(program uint32) string {
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var length C.GLint
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C.glGetProgramiv(C.GLuint(program), C.GL_INFO_LOG_LENGTH, &length)
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if length == 0 {
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return ""
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}
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clog := C.CBytes(make([]byte, int(length)+1))
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defer C.free(clog)
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C.glGetProgramInfoLog(C.GLuint(program), C.GLsizei(length), nil, (*C.GLchar)(clog))
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return string(C.GoBytes(clog, C.int(length)))
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}
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func (GLImpl) GetProgramiv(program uint32, pname uint32, params *int32) {
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C.glGetProgramiv(C.GLuint(program), C.GLenum(pname), (*C.GLint)(params))
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}
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func (GLImpl) GetShaderInfoLog(program uint32) string {
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var length C.GLint
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C.glGetShaderiv(C.GLuint(program), C.GL_INFO_LOG_LENGTH, &length)
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if length == 0 {
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return ""
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}
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clog := C.CBytes(make([]byte, int(length)+1))
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defer C.free(clog)
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C.glGetShaderInfoLog(C.GLuint(program), C.GLsizei(length), nil, (*C.GLchar)(clog))
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return string(C.GoBytes(clog, C.int(length)))
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}
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func (GLImpl) GetShaderiv(shader uint32, pname uint32, params *int32) {
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C.glGetShaderiv(C.GLuint(shader), C.GLenum(pname), (*C.GLint)(params))
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}
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func (GLImpl) GetUniformLocation(program uint32, name string) int32 {
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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return int32(C.glGetUniformLocation(C.GLuint(program), (*C.GLchar)(cname)))
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}
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func (GLImpl) LinkProgram(program uint32) {
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C.glLinkProgram(C.GLuint(program))
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}
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func (GLImpl) ReadPixels(x int32, y int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
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C.glReadPixels(C.GLint(x), C.GLint(y), C.GLsizei(width), C.GLsizei(height), C.GLenum(format), C.GLenum(xtype), pixels)
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}
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func (GLImpl) RenderbufferStorage(target uint32, internalformat uint32, width int32, height int32) {
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C.glRenderbufferStorage(C.GLenum(target), C.GLenum(internalformat), C.GLint(width), C.GLint(height))
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}
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func (GLImpl) Scissor(x int32, y int32, width int32, height int32) {
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C.glScissor(C.GLint(x), C.GLint(y), C.GLsizei(width), C.GLsizei(height))
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}
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func (GLImpl) ShaderSource(shader uint32, source string) {
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csource := (*C.GLchar)(C.CString(source))
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defer C.free(unsafe.Pointer(csource))
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C.glShaderSource(C.GLuint(shader), 1, &csource, nil)
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}
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func (GLImpl) StencilFunc(xfunc uint32, ref int32, mask uint32) {
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C.glStencilFunc(C.GLenum(xfunc), C.GLint(ref), C.GLuint(mask))
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}
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func (GLImpl) StencilMask(mask uint32) {
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C.glStencilMask(C.GLuint(mask))
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}
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func (GLImpl) StencilOp(fail uint32, zfail uint32, zpass uint32) {
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C.glStencilOp(C.GLenum(fail), C.GLenum(zfail), C.GLenum(zpass))
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}
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func (GLImpl) TexImage2D(target uint32, level int32, internalformat int32, width int32, height int32, border int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
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C.glTexImage2D(C.GLenum(target), C.GLint(level), C.GLint(internalformat), C.GLsizei(width), C.GLsizei(height), C.GLint(border), C.GLenum(format), C.GLenum(xtype), pixels)
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}
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func (GLImpl) TexParameteri(target uint32, pname uint32, param int32) {
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C.glTexParameteri(C.GLenum(target), C.GLenum(pname), C.GLint(param))
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}
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func (GLImpl) TexSubImage2D(target uint32, level int32, xoffset int32, yoffset int32, width int32, height int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
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C.glTexSubImage2D(C.GLenum(target), C.GLint(level), C.GLint(xoffset), C.GLint(yoffset), C.GLsizei(width), C.GLsizei(height), C.GLenum(format), C.GLenum(xtype), pixels)
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}
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func (GLImpl) Uniform1f(location int32, v0 float32) {
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C.glUniform1f(C.GLint(location), C.GLfloat(v0))
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}
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func (GLImpl) Uniform1fv(location int32, count int32, v *float32) {
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C.glUniform1fv(C.GLint(location), C.GLsizei(count), (*C.GLfloat)(v))
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}
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func (GLImpl) Uniform1i(location int32, v0 int32) {
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C.glUniform1i(C.GLint(location), C.GLint(v0))
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}
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func (GLImpl) Uniform2f(location int32, v0 float32, v1 float32) {
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C.glUniform2f(C.GLint(location), C.GLfloat(v0), C.GLfloat(v1))
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}
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func (GLImpl) Uniform4f(location int32, v0 float32, v1 float32, v2 float32, v3 float32) {
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C.glUniform4f(C.GLint(location), C.GLfloat(v0), C.GLfloat(v1), C.GLfloat(v2), C.GLfloat(v3))
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}
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func (GLImpl) UniformMatrix3fv(location int32, count int32, transpose bool, value *float32) {
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var t C.GLboolean
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if transpose {
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t = 1
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}
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C.glUniformMatrix3fv(C.GLint(location), C.GLsizei(count), t, (*C.GLfloat)(value))
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}
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func (GLImpl) UseProgram(program uint32) {
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C.glUseProgram(C.GLuint(program))
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}
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func (GLImpl) VertexAttribPointer(index uint32, size int32, xtype uint32, normalized bool, stride int32, offset uint32) {
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var n C.GLboolean
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if normalized {
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n = 1
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}
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C.glVertexAttribPointer(C.GLuint(index), C.GLint(size), C.GLenum(xtype), n, C.GLsizei(stride), unsafe.Pointer(uintptr(offset)))
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}
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func (GLImpl) Viewport(x int32, y int32, width int32, height int32) {
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C.glViewport(C.GLint(x), C.GLint(y), C.GLsizei(width), C.GLsizei(height))
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}
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