mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
562 lines
20 KiB
Go
562 lines
20 KiB
Go
// Copyright 2022 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build (darwin || freebsd || linux || netbsd || openbsd || windows) && !nintendosdk && !playstation5
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package gl
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import (
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"runtime"
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"unsafe"
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"github.com/ebitengine/purego"
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)
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type defaultContext struct {
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gpActiveTexture uintptr
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gpAttachShader uintptr
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gpBindAttribLocation uintptr
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gpBindBuffer uintptr
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gpBindFramebuffer uintptr
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gpBindRenderbuffer uintptr
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gpBindTexture uintptr
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gpBindVertexArray uintptr
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gpBlendEquationSeparate uintptr
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gpBlendFuncSeparate uintptr
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gpBufferData uintptr
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gpBufferSubData uintptr
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gpCheckFramebufferStatus uintptr
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gpClear uintptr
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gpColorMask uintptr
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gpCompileShader uintptr
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gpCreateProgram uintptr
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gpCreateShader uintptr
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gpDeleteBuffers uintptr
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gpDeleteFramebuffers uintptr
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gpDeleteProgram uintptr
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gpDeleteRenderbuffers uintptr
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gpDeleteShader uintptr
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gpDeleteTextures uintptr
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gpDeleteVertexArrays uintptr
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gpDisable uintptr
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gpDisableVertexAttribArray uintptr
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gpDrawElements uintptr
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gpEnable uintptr
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gpEnableVertexAttribArray uintptr
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gpFlush uintptr
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gpFramebufferRenderbuffer uintptr
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gpFramebufferTexture2D uintptr
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gpGenBuffers uintptr
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gpGenFramebuffers uintptr
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gpGenRenderbuffers uintptr
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gpGenTextures uintptr
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gpGenVertexArrays uintptr
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gpGetError uintptr
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gpGetIntegerv uintptr
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gpGetProgramInfoLog uintptr
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gpGetProgramiv uintptr
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gpGetShaderInfoLog uintptr
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gpGetShaderiv uintptr
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gpGetUniformLocation uintptr
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gpIsProgram uintptr
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gpLinkProgram uintptr
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gpPixelStorei uintptr
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gpReadPixels uintptr
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gpRenderbufferStorage uintptr
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gpScissor uintptr
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gpShaderSource uintptr
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gpStencilFunc uintptr
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gpStencilOpSeparate uintptr
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gpTexImage2D uintptr
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gpTexParameteri uintptr
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gpTexSubImage2D uintptr
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gpUniform1fv uintptr
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gpUniform1i uintptr
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gpUniform1iv uintptr
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gpUniform2fv uintptr
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gpUniform2iv uintptr
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gpUniform3fv uintptr
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gpUniform3iv uintptr
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gpUniform4fv uintptr
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gpUniform4iv uintptr
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gpUniformMatrix2fv uintptr
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gpUniformMatrix3fv uintptr
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gpUniformMatrix4fv uintptr
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gpUseProgram uintptr
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gpVertexAttribPointer uintptr
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gpViewport uintptr
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isES bool
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}
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func NewDefaultContext() (Context, error) {
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ctx := &defaultContext{}
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if err := ctx.init(); err != nil {
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return nil, err
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}
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return ctx, nil
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}
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func boolToInt(b bool) int {
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if b {
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return 1
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}
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return 0
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}
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func (c *defaultContext) IsES() bool {
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return c.isES
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}
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func (c *defaultContext) ActiveTexture(texture uint32) {
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purego.SyscallN(c.gpActiveTexture, uintptr(texture))
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}
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func (c *defaultContext) AttachShader(program uint32, shader uint32) {
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purego.SyscallN(c.gpAttachShader, uintptr(program), uintptr(shader))
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}
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func (c *defaultContext) BindAttribLocation(program uint32, index uint32, name string) {
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cname, free := cStr(name)
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defer free()
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purego.SyscallN(c.gpBindAttribLocation, uintptr(program), uintptr(index), uintptr(unsafe.Pointer(cname)))
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}
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func (c *defaultContext) BindBuffer(target uint32, buffer uint32) {
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purego.SyscallN(c.gpBindBuffer, uintptr(target), uintptr(buffer))
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}
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func (c *defaultContext) BindFramebuffer(target uint32, framebuffer uint32) {
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purego.SyscallN(c.gpBindFramebuffer, uintptr(target), uintptr(framebuffer))
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}
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func (c *defaultContext) BindRenderbuffer(target uint32, renderbuffer uint32) {
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purego.SyscallN(c.gpBindRenderbuffer, uintptr(target), uintptr(renderbuffer))
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}
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func (c *defaultContext) BindTexture(target uint32, texture uint32) {
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purego.SyscallN(c.gpBindTexture, uintptr(target), uintptr(texture))
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}
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func (c *defaultContext) BindVertexArray(array uint32) {
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purego.SyscallN(c.gpBindVertexArray, uintptr(array))
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}
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func (c *defaultContext) BlendEquationSeparate(modeRGB uint32, modeAlpha uint32) {
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purego.SyscallN(c.gpBlendEquationSeparate, uintptr(modeRGB), uintptr(modeAlpha))
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}
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func (c *defaultContext) BlendFuncSeparate(srcRGB uint32, dstRGB uint32, srcAlpha uint32, dstAlpha uint32) {
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purego.SyscallN(c.gpBlendFuncSeparate, uintptr(srcRGB), uintptr(dstRGB), uintptr(srcAlpha), uintptr(dstAlpha))
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}
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func (c *defaultContext) BufferInit(target uint32, size int, usage uint32) {
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purego.SyscallN(c.gpBufferData, uintptr(target), uintptr(size), 0, uintptr(usage))
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}
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func (c *defaultContext) BufferSubData(target uint32, offset int, data []byte) {
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purego.SyscallN(c.gpBufferSubData, uintptr(target), uintptr(offset), uintptr(len(data)), uintptr(unsafe.Pointer(&data[0])))
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runtime.KeepAlive(data)
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}
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func (c *defaultContext) CheckFramebufferStatus(target uint32) uint32 {
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ret, _, _ := purego.SyscallN(c.gpCheckFramebufferStatus, uintptr(target))
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return uint32(ret)
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}
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func (c *defaultContext) Clear(mask uint32) {
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purego.SyscallN(c.gpClear, uintptr(mask))
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}
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func (c *defaultContext) ColorMask(red bool, green bool, blue bool, alpha bool) {
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purego.SyscallN(c.gpColorMask, uintptr(boolToInt(red)), uintptr(boolToInt(green)), uintptr(boolToInt(blue)), uintptr(boolToInt(alpha)))
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}
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func (c *defaultContext) CompileShader(shader uint32) {
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purego.SyscallN(c.gpCompileShader, uintptr(shader))
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}
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func (c *defaultContext) CreateBuffer() uint32 {
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var buffer uint32
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purego.SyscallN(c.gpGenBuffers, 1, uintptr(unsafe.Pointer(&buffer)))
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return buffer
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}
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func (c *defaultContext) CreateFramebuffer() uint32 {
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var framebuffer uint32
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purego.SyscallN(c.gpGenFramebuffers, 1, uintptr(unsafe.Pointer(&framebuffer)))
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return framebuffer
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}
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func (c *defaultContext) CreateProgram() uint32 {
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ret, _, _ := purego.SyscallN(c.gpCreateProgram)
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return uint32(ret)
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}
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func (c *defaultContext) CreateRenderbuffer() uint32 {
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var renderbuffer uint32
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purego.SyscallN(c.gpGenRenderbuffers, 1, uintptr(unsafe.Pointer(&renderbuffer)))
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return renderbuffer
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}
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func (c *defaultContext) CreateShader(xtype uint32) uint32 {
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ret, _, _ := purego.SyscallN(c.gpCreateShader, uintptr(xtype))
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return uint32(ret)
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}
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func (c *defaultContext) CreateTexture() uint32 {
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var texture uint32
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purego.SyscallN(c.gpGenTextures, 1, uintptr(unsafe.Pointer(&texture)))
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return texture
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}
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func (c *defaultContext) CreateVertexArray() uint32 {
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var array uint32
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purego.SyscallN(c.gpGenVertexArrays, 1, uintptr(unsafe.Pointer(&array)))
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return array
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}
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func (c *defaultContext) DeleteBuffer(buffer uint32) {
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purego.SyscallN(c.gpDeleteBuffers, 1, uintptr(unsafe.Pointer(&buffer)))
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}
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func (c *defaultContext) DeleteFramebuffer(framebuffer uint32) {
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purego.SyscallN(c.gpDeleteFramebuffers, 1, uintptr(unsafe.Pointer(&framebuffer)))
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}
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func (c *defaultContext) DeleteProgram(program uint32) {
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purego.SyscallN(c.gpDeleteProgram, uintptr(program))
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}
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func (c *defaultContext) DeleteRenderbuffer(renderbuffer uint32) {
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purego.SyscallN(c.gpDeleteRenderbuffers, 1, uintptr(unsafe.Pointer(&renderbuffer)))
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}
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func (c *defaultContext) DeleteShader(shader uint32) {
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purego.SyscallN(c.gpDeleteShader, uintptr(shader))
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}
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func (c *defaultContext) DeleteTexture(texture uint32) {
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purego.SyscallN(c.gpDeleteTextures, 1, uintptr(unsafe.Pointer(&texture)))
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}
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func (c *defaultContext) DeleteVertexArray(array uint32) {
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purego.SyscallN(c.gpDeleteVertexArrays, 1, uintptr(unsafe.Pointer(&array)))
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}
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func (c *defaultContext) Disable(cap uint32) {
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purego.SyscallN(c.gpDisable, uintptr(cap))
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}
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func (c *defaultContext) DisableVertexAttribArray(index uint32) {
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purego.SyscallN(c.gpDisableVertexAttribArray, uintptr(index))
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}
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func (c *defaultContext) DrawElements(mode uint32, count int32, xtype uint32, offset int) {
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purego.SyscallN(c.gpDrawElements, uintptr(mode), uintptr(count), uintptr(xtype), uintptr(offset))
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}
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func (c *defaultContext) Enable(cap uint32) {
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purego.SyscallN(c.gpEnable, uintptr(cap))
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}
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func (c *defaultContext) EnableVertexAttribArray(index uint32) {
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purego.SyscallN(c.gpEnableVertexAttribArray, uintptr(index))
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}
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func (c *defaultContext) Flush() {
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purego.SyscallN(c.gpFlush)
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}
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func (c *defaultContext) FramebufferRenderbuffer(target uint32, attachment uint32, renderbuffertarget uint32, renderbuffer uint32) {
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purego.SyscallN(c.gpFramebufferRenderbuffer, uintptr(target), uintptr(attachment), uintptr(renderbuffertarget), uintptr(renderbuffer))
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}
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func (c *defaultContext) FramebufferTexture2D(target uint32, attachment uint32, textarget uint32, texture uint32, level int32) {
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purego.SyscallN(c.gpFramebufferTexture2D, uintptr(target), uintptr(attachment), uintptr(textarget), uintptr(texture), uintptr(level))
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}
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func (c *defaultContext) GetError() uint32 {
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ret, _, _ := purego.SyscallN(c.gpGetError)
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return uint32(ret)
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}
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func (c *defaultContext) GetInteger(pname uint32) int {
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var dst int32
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purego.SyscallN(c.gpGetIntegerv, uintptr(pname), uintptr(unsafe.Pointer(&dst)))
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return int(dst)
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}
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func (c *defaultContext) GetProgramInfoLog(program uint32) string {
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bufSize := c.GetProgrami(program, INFO_LOG_LENGTH)
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if bufSize == 0 {
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return ""
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}
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infoLog := make([]byte, bufSize)
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purego.SyscallN(c.gpGetProgramInfoLog, uintptr(program), uintptr(bufSize), 0, uintptr(unsafe.Pointer(&infoLog[0])))
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return string(infoLog)
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}
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func (c *defaultContext) GetProgrami(program uint32, pname uint32) int {
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var dst int32
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purego.SyscallN(c.gpGetProgramiv, uintptr(program), uintptr(pname), uintptr(unsafe.Pointer(&dst)))
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return int(dst)
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}
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func (c *defaultContext) GetShaderInfoLog(shader uint32) string {
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bufSize := c.GetShaderi(shader, INFO_LOG_LENGTH)
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if bufSize == 0 {
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return ""
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}
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infoLog := make([]byte, bufSize)
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purego.SyscallN(c.gpGetShaderInfoLog, uintptr(shader), uintptr(bufSize), 0, uintptr(unsafe.Pointer(&infoLog[0])))
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return string(infoLog)
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}
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func (c *defaultContext) GetShaderi(shader uint32, pname uint32) int {
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var dst int32
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purego.SyscallN(c.gpGetShaderiv, uintptr(shader), uintptr(pname), uintptr(unsafe.Pointer(&dst)))
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return int(dst)
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}
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func (c *defaultContext) GetUniformLocation(program uint32, name string) int32 {
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cname, free := cStr(name)
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defer free()
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ret, _, _ := purego.SyscallN(c.gpGetUniformLocation, uintptr(program), uintptr(unsafe.Pointer(cname)))
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return int32(ret)
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}
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func (c *defaultContext) IsProgram(program uint32) bool {
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ret, _, _ := purego.SyscallN(c.gpIsProgram, uintptr(program))
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return byte(ret) != 0
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}
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func (c *defaultContext) LinkProgram(program uint32) {
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purego.SyscallN(c.gpLinkProgram, uintptr(program))
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}
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func (c *defaultContext) PixelStorei(pname uint32, param int32) {
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purego.SyscallN(c.gpPixelStorei, uintptr(pname), uintptr(param))
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}
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func (c *defaultContext) ReadPixels(dst []byte, x int32, y int32, width int32, height int32, format uint32, xtype uint32) {
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purego.SyscallN(c.gpReadPixels, uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(format), uintptr(xtype), uintptr(unsafe.Pointer(&dst[0])))
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}
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func (c *defaultContext) RenderbufferStorage(target uint32, internalformat uint32, width int32, height int32) {
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purego.SyscallN(c.gpRenderbufferStorage, uintptr(target), uintptr(internalformat), uintptr(width), uintptr(height))
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}
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func (c *defaultContext) Scissor(x int32, y int32, width int32, height int32) {
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purego.SyscallN(c.gpScissor, uintptr(x), uintptr(y), uintptr(width), uintptr(height))
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}
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func (c *defaultContext) ShaderSource(shader uint32, xstring string) {
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cstring, free := cStr(xstring)
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defer free()
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purego.SyscallN(c.gpShaderSource, uintptr(shader), 1, uintptr(unsafe.Pointer(&cstring)), 0)
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}
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func (c *defaultContext) StencilFunc(xfunc uint32, ref int32, mask uint32) {
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purego.SyscallN(c.gpStencilFunc, uintptr(xfunc), uintptr(ref), uintptr(mask))
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}
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func (c *defaultContext) StencilOpSeparate(face uint32, fail uint32, zfail uint32, zpass uint32) {
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purego.SyscallN(c.gpStencilOpSeparate, uintptr(face), uintptr(fail), uintptr(zfail), uintptr(zpass))
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}
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func (c *defaultContext) TexImage2D(target uint32, level int32, internalformat int32, width int32, height int32, format uint32, xtype uint32, pixels []byte) {
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var ptr *byte
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if len(pixels) > 0 {
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ptr = &pixels[0]
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}
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purego.SyscallN(c.gpTexImage2D, uintptr(target), uintptr(level), uintptr(internalformat), uintptr(width), uintptr(height), 0, uintptr(format), uintptr(xtype), uintptr(unsafe.Pointer(ptr)))
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runtime.KeepAlive(pixels)
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}
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func (c *defaultContext) TexParameteri(target uint32, pname uint32, param int32) {
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purego.SyscallN(c.gpTexParameteri, uintptr(target), uintptr(pname), uintptr(param))
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}
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func (c *defaultContext) TexSubImage2D(target uint32, level int32, xoffset int32, yoffset int32, width int32, height int32, format uint32, xtype uint32, pixels []byte) {
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purego.SyscallN(c.gpTexSubImage2D, uintptr(target), uintptr(level), uintptr(xoffset), uintptr(yoffset), uintptr(width), uintptr(height), uintptr(format), uintptr(xtype), uintptr(unsafe.Pointer(&pixels[0])))
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runtime.KeepAlive(pixels)
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}
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func (c *defaultContext) Uniform1fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniform1fv, uintptr(location), uintptr(len(value)), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform1i(location int32, v0 int32) {
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purego.SyscallN(c.gpUniform1i, uintptr(location), uintptr(v0))
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}
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func (c *defaultContext) Uniform1iv(location int32, value []int32) {
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purego.SyscallN(c.gpUniform1iv, uintptr(location), uintptr(len(value)), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform2fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniform2fv, uintptr(location), uintptr(len(value)/2), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform2iv(location int32, value []int32) {
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purego.SyscallN(c.gpUniform2iv, uintptr(location), uintptr(len(value)/2), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform3fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniform3fv, uintptr(location), uintptr(len(value)/3), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform3iv(location int32, value []int32) {
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purego.SyscallN(c.gpUniform3iv, uintptr(location), uintptr(len(value)/3), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform4fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniform4fv, uintptr(location), uintptr(len(value)/4), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) Uniform4iv(location int32, value []int32) {
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purego.SyscallN(c.gpUniform4iv, uintptr(location), uintptr(len(value)/4), uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) UniformMatrix2fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniformMatrix2fv, uintptr(location), uintptr(len(value)/4), 0, uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) UniformMatrix3fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniformMatrix3fv, uintptr(location), uintptr(len(value)/9), 0, uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) UniformMatrix4fv(location int32, value []float32) {
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purego.SyscallN(c.gpUniformMatrix4fv, uintptr(location), uintptr(len(value)/16), 0, uintptr(unsafe.Pointer(&value[0])))
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runtime.KeepAlive(value)
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}
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func (c *defaultContext) UseProgram(program uint32) {
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purego.SyscallN(c.gpUseProgram, uintptr(program))
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}
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func (c *defaultContext) VertexAttribPointer(index uint32, size int32, xtype uint32, normalized bool, stride int32, offset int) {
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purego.SyscallN(c.gpVertexAttribPointer, uintptr(index), uintptr(size), uintptr(xtype), uintptr(boolToInt(normalized)), uintptr(stride), uintptr(offset))
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}
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func (c *defaultContext) Viewport(x int32, y int32, width int32, height int32) {
|
|
purego.SyscallN(c.gpViewport, uintptr(x), uintptr(y), uintptr(width), uintptr(height))
|
|
}
|
|
|
|
func (c *defaultContext) LoadFunctions() error {
|
|
g := procAddressGetter{ctx: c}
|
|
|
|
c.gpActiveTexture = g.get("glActiveTexture")
|
|
c.gpAttachShader = g.get("glAttachShader")
|
|
c.gpBindAttribLocation = g.get("glBindAttribLocation")
|
|
c.gpBindBuffer = g.get("glBindBuffer")
|
|
c.gpBindFramebuffer = g.get("glBindFramebuffer")
|
|
c.gpBindRenderbuffer = g.get("glBindRenderbuffer")
|
|
c.gpBindTexture = g.get("glBindTexture")
|
|
c.gpBindVertexArray = g.get("glBindVertexArray")
|
|
c.gpBlendEquationSeparate = g.get("glBlendEquationSeparate")
|
|
c.gpBlendFuncSeparate = g.get("glBlendFuncSeparate")
|
|
c.gpBufferData = g.get("glBufferData")
|
|
c.gpBufferSubData = g.get("glBufferSubData")
|
|
c.gpCheckFramebufferStatus = g.get("glCheckFramebufferStatus")
|
|
c.gpClear = g.get("glClear")
|
|
c.gpColorMask = g.get("glColorMask")
|
|
c.gpCompileShader = g.get("glCompileShader")
|
|
c.gpCreateProgram = g.get("glCreateProgram")
|
|
c.gpCreateShader = g.get("glCreateShader")
|
|
c.gpDeleteBuffers = g.get("glDeleteBuffers")
|
|
c.gpDeleteFramebuffers = g.get("glDeleteFramebuffers")
|
|
c.gpDeleteProgram = g.get("glDeleteProgram")
|
|
c.gpDeleteRenderbuffers = g.get("glDeleteRenderbuffers")
|
|
c.gpDeleteShader = g.get("glDeleteShader")
|
|
c.gpDeleteTextures = g.get("glDeleteTextures")
|
|
c.gpDeleteVertexArrays = g.get("glDeleteVertexArrays")
|
|
c.gpDisable = g.get("glDisable")
|
|
c.gpDisableVertexAttribArray = g.get("glDisableVertexAttribArray")
|
|
c.gpDrawElements = g.get("glDrawElements")
|
|
c.gpEnable = g.get("glEnable")
|
|
c.gpEnableVertexAttribArray = g.get("glEnableVertexAttribArray")
|
|
c.gpFlush = g.get("glFlush")
|
|
c.gpFramebufferRenderbuffer = g.get("glFramebufferRenderbuffer")
|
|
c.gpFramebufferTexture2D = g.get("glFramebufferTexture2D")
|
|
c.gpGenBuffers = g.get("glGenBuffers")
|
|
c.gpGenFramebuffers = g.get("glGenFramebuffers")
|
|
c.gpGenRenderbuffers = g.get("glGenRenderbuffers")
|
|
c.gpGenTextures = g.get("glGenTextures")
|
|
c.gpGenVertexArrays = g.get("glGenVertexArrays")
|
|
c.gpGetError = g.get("glGetError")
|
|
c.gpGetIntegerv = g.get("glGetIntegerv")
|
|
c.gpGetProgramInfoLog = g.get("glGetProgramInfoLog")
|
|
c.gpGetProgramiv = g.get("glGetProgramiv")
|
|
c.gpGetShaderInfoLog = g.get("glGetShaderInfoLog")
|
|
c.gpGetShaderiv = g.get("glGetShaderiv")
|
|
c.gpGetUniformLocation = g.get("glGetUniformLocation")
|
|
c.gpIsProgram = g.get("glIsProgram")
|
|
c.gpLinkProgram = g.get("glLinkProgram")
|
|
c.gpPixelStorei = g.get("glPixelStorei")
|
|
c.gpReadPixels = g.get("glReadPixels")
|
|
c.gpRenderbufferStorage = g.get("glRenderbufferStorage")
|
|
c.gpScissor = g.get("glScissor")
|
|
c.gpShaderSource = g.get("glShaderSource")
|
|
c.gpStencilFunc = g.get("glStencilFunc")
|
|
c.gpStencilOpSeparate = g.get("glStencilOpSeparate")
|
|
c.gpTexImage2D = g.get("glTexImage2D")
|
|
c.gpTexParameteri = g.get("glTexParameteri")
|
|
c.gpTexSubImage2D = g.get("glTexSubImage2D")
|
|
c.gpUniform1fv = g.get("glUniform1fv")
|
|
c.gpUniform1i = g.get("glUniform1i")
|
|
c.gpUniform1iv = g.get("glUniform1iv")
|
|
c.gpUniform2fv = g.get("glUniform2fv")
|
|
c.gpUniform2iv = g.get("glUniform2iv")
|
|
c.gpUniform3fv = g.get("glUniform3fv")
|
|
c.gpUniform3iv = g.get("glUniform3iv")
|
|
c.gpUniform4fv = g.get("glUniform4fv")
|
|
c.gpUniform4iv = g.get("glUniform4iv")
|
|
c.gpUniformMatrix2fv = g.get("glUniformMatrix2fv")
|
|
c.gpUniformMatrix3fv = g.get("glUniformMatrix3fv")
|
|
c.gpUniformMatrix4fv = g.get("glUniformMatrix4fv")
|
|
c.gpUseProgram = g.get("glUseProgram")
|
|
c.gpVertexAttribPointer = g.get("glVertexAttribPointer")
|
|
c.gpViewport = g.get("glViewport")
|
|
|
|
return g.error()
|
|
}
|
|
|
|
// cStr takes a Go string (with or without null-termination)
|
|
// and returns the C counterpart.
|
|
//
|
|
// The returned free function must be called once you are done using the string
|
|
// in order to free the memory.
|
|
func cStr(str string) (cstr *byte, free func()) {
|
|
bs := []byte(str)
|
|
if len(bs) == 0 || bs[len(bs)-1] != 0 {
|
|
bs = append(bs, 0)
|
|
}
|
|
return &bs[0], func() {
|
|
runtime.KeepAlive(bs)
|
|
bs = nil
|
|
}
|
|
}
|