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