mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-28 04:38:55 +01:00
073d022c2e
These function return true in most cases, and when these return false, the situation is pretty bad and recovering the situation would not be possible. IsFramebuffer and IsRenderbuffer cause round trips and affect performance. Let's remove them.
556 lines
20 KiB
Go
556 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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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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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) {
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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
|
|
}
|
|
}
|