twitchapon-anim

Basic Twitchapon Receiver/Visuals
git clone git://bsandro.tech/twitchapon-anim
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work_windows.go (30295B)


      1 // Copyright 2015 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 package gl
      6 
      7 import (
      8 	"runtime"
      9 	"syscall"
     10 	"unsafe"
     11 )
     12 
     13 // context is described in work.go.
     14 type context struct {
     15 	debug         int32
     16 	workAvailable chan struct{}
     17 	work          chan call
     18 	retvalue      chan uintptr
     19 
     20 	// TODO(crawshaw): will not work with a moving collector
     21 	cStringCounter int
     22 	cStrings       map[int]unsafe.Pointer
     23 }
     24 
     25 func (ctx *context) WorkAvailable() <-chan struct{} { return ctx.workAvailable }
     26 
     27 type context3 struct {
     28 	*context
     29 }
     30 
     31 func NewContext() (Context, Worker) {
     32 	if err := findDLLs(); err != nil {
     33 		panic(err)
     34 	}
     35 	glctx := &context{
     36 		workAvailable: make(chan struct{}, 1),
     37 		work:          make(chan call, 3),
     38 		retvalue:      make(chan uintptr),
     39 		cStrings:      make(map[int]unsafe.Pointer),
     40 	}
     41 	return glctx, glctx
     42 }
     43 
     44 func (ctx *context) enqueue(c call) uintptr {
     45 	ctx.work <- c
     46 
     47 	select {
     48 	case ctx.workAvailable <- struct{}{}:
     49 	default:
     50 	}
     51 
     52 	if c.blocking {
     53 		return <-ctx.retvalue
     54 	}
     55 	return 0
     56 }
     57 
     58 func (ctx *context) DoWork() {
     59 	// TODO: add a work queue
     60 	for {
     61 		select {
     62 		case w := <-ctx.work:
     63 			ret := ctx.doWork(w)
     64 			if w.blocking {
     65 				ctx.retvalue <- ret
     66 			}
     67 		default:
     68 			return
     69 		}
     70 	}
     71 }
     72 
     73 func (ctx *context) cString(s string) (uintptr, func()) {
     74 	buf := make([]byte, len(s)+1)
     75 	for i := 0; i < len(s); i++ {
     76 		buf[i] = s[i]
     77 	}
     78 	ret := unsafe.Pointer(&buf[0])
     79 	id := ctx.cStringCounter
     80 	ctx.cStringCounter++
     81 	ctx.cStrings[id] = ret
     82 	return uintptr(ret), func() { delete(ctx.cStrings, id) }
     83 }
     84 
     85 func (ctx *context) cStringPtr(str string) (uintptr, func()) {
     86 	s, sfree := ctx.cString(str)
     87 	sptr := [2]uintptr{s, 0}
     88 	ret := unsafe.Pointer(&sptr[0])
     89 	id := ctx.cStringCounter
     90 	ctx.cStringCounter++
     91 	ctx.cStrings[id] = ret
     92 	return uintptr(ret), func() { sfree(); delete(ctx.cStrings, id) }
     93 }
     94 
     95 // fixFloat copies the first four arguments into the XMM registers.
     96 // This is for the windows/amd64 calling convention, that wants
     97 // floating point arguments to be passed in XMM.
     98 //
     99 // Mercifully, type information is not required to implement
    100 // this calling convention. In particular see the mixed int/float
    101 // examples:
    102 //
    103 //	https://msdn.microsoft.com/en-us/library/zthk2dkh.aspx
    104 //
    105 // This means it could be fixed in syscall.Syscall. The relevant
    106 // issue is
    107 //
    108 //	https://golang.org/issue/6510
    109 func fixFloat(x0, x1, x2, x3 uintptr)
    110 
    111 func (ctx *context) doWork(c call) (ret uintptr) {
    112 	if runtime.GOARCH == "amd64" {
    113 		fixFloat(c.args.a0, c.args.a1, c.args.a2, c.args.a3)
    114 	}
    115 
    116 	switch c.args.fn {
    117 	case glfnActiveTexture:
    118 		syscall.Syscall(glActiveTexture.Addr(), 1, c.args.a0, 0, 0)
    119 	case glfnAttachShader:
    120 		syscall.Syscall(glAttachShader.Addr(), 2, c.args.a0, c.args.a1, 0)
    121 	case glfnBindAttribLocation:
    122 		syscall.Syscall(glBindAttribLocation.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    123 	case glfnBindBuffer:
    124 		syscall.Syscall(glBindBuffer.Addr(), 2, c.args.a0, c.args.a1, 0)
    125 	case glfnBindFramebuffer:
    126 		syscall.Syscall(glBindFramebuffer.Addr(), 2, c.args.a0, c.args.a1, 0)
    127 	case glfnBindRenderbuffer:
    128 		syscall.Syscall(glBindRenderbuffer.Addr(), 2, c.args.a0, c.args.a1, 0)
    129 	case glfnBindTexture:
    130 		syscall.Syscall(glBindTexture.Addr(), 2, c.args.a0, c.args.a1, 0)
    131 	case glfnBindVertexArray:
    132 		syscall.Syscall(glBindVertexArray.Addr(), 1, c.args.a0, 0, 0)
    133 	case glfnBlendColor:
    134 		syscall.Syscall6(glBlendColor.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    135 	case glfnBlendEquation:
    136 		syscall.Syscall(glBlendEquation.Addr(), 1, c.args.a0, 0, 0)
    137 	case glfnBlendEquationSeparate:
    138 		syscall.Syscall(glBlendEquationSeparate.Addr(), 2, c.args.a0, c.args.a1, 0)
    139 	case glfnBlendFunc:
    140 		syscall.Syscall(glBlendFunc.Addr(), 2, c.args.a0, c.args.a1, 0)
    141 	case glfnBlendFuncSeparate:
    142 		syscall.Syscall6(glBlendFuncSeparate.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    143 	case glfnBufferData:
    144 		syscall.Syscall6(glBufferData.Addr(), 4, c.args.a0, c.args.a1, uintptr(c.parg), c.args.a2, 0, 0)
    145 	case glfnBufferSubData:
    146 		syscall.Syscall6(glBufferSubData.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, uintptr(c.parg), 0, 0)
    147 	case glfnCheckFramebufferStatus:
    148 		ret, _, _ = syscall.Syscall(glCheckFramebufferStatus.Addr(), 1, c.args.a0, 0, 0)
    149 	case glfnClear:
    150 		syscall.Syscall(glClear.Addr(), 1, c.args.a0, 0, 0)
    151 	case glfnClearColor:
    152 		syscall.Syscall6(glClearColor.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    153 	case glfnClearDepthf:
    154 		syscall.Syscall6(glClearDepthf.Addr(), 1, c.args.a0, 0, 0, 0, 0, 0)
    155 	case glfnClearStencil:
    156 		syscall.Syscall(glClearStencil.Addr(), 1, c.args.a0, 0, 0)
    157 	case glfnColorMask:
    158 		syscall.Syscall6(glColorMask.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    159 	case glfnCompileShader:
    160 		syscall.Syscall(glCompileShader.Addr(), 1, c.args.a0, 0, 0)
    161 	case glfnCompressedTexImage2D:
    162 		syscall.Syscall9(glCompressedTexImage2D.Addr(), 8, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, c.args.a6, uintptr(c.parg), 0)
    163 	case glfnCompressedTexSubImage2D:
    164 		syscall.Syscall9(glCompressedTexSubImage2D.Addr(), 9, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, c.args.a6, c.args.a7, uintptr(c.parg))
    165 	case glfnCopyTexImage2D:
    166 		syscall.Syscall9(glCopyTexImage2D.Addr(), 8, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, c.args.a6, c.args.a7, 0)
    167 	case glfnCopyTexSubImage2D:
    168 		syscall.Syscall9(glCopyTexSubImage2D.Addr(), 8, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, c.args.a6, c.args.a7, 0)
    169 	case glfnCreateProgram:
    170 		ret, _, _ = syscall.Syscall(glCreateProgram.Addr(), 0, 0, 0, 0)
    171 	case glfnCreateShader:
    172 		ret, _, _ = syscall.Syscall(glCreateShader.Addr(), 1, c.args.a0, 0, 0)
    173 	case glfnCullFace:
    174 		syscall.Syscall(glCullFace.Addr(), 1, c.args.a0, 0, 0)
    175 	case glfnDeleteBuffer:
    176 		syscall.Syscall(glDeleteBuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&c.args.a0)), 0)
    177 	case glfnDeleteFramebuffer:
    178 		syscall.Syscall(glDeleteFramebuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&c.args.a0)), 0)
    179 	case glfnDeleteProgram:
    180 		syscall.Syscall(glDeleteProgram.Addr(), 1, c.args.a0, 0, 0)
    181 	case glfnDeleteRenderbuffer:
    182 		syscall.Syscall(glDeleteRenderbuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&c.args.a0)), 0)
    183 	case glfnDeleteShader:
    184 		syscall.Syscall(glDeleteShader.Addr(), 1, c.args.a0, 0, 0)
    185 	case glfnDeleteVertexArray:
    186 		syscall.Syscall(glDeleteVertexArrays.Addr(), 2, 1, uintptr(unsafe.Pointer(&c.args.a0)), 0)
    187 	case glfnDeleteTexture:
    188 		syscall.Syscall(glDeleteTextures.Addr(), 2, 1, uintptr(unsafe.Pointer(&c.args.a0)), 0)
    189 	case glfnDepthFunc:
    190 		syscall.Syscall(glDepthFunc.Addr(), 1, c.args.a0, 0, 0)
    191 	case glfnDepthRangef:
    192 		syscall.Syscall6(glDepthRangef.Addr(), 2, c.args.a0, c.args.a1, 0, 0, 0, 0)
    193 	case glfnDepthMask:
    194 		syscall.Syscall(glDepthMask.Addr(), 1, c.args.a0, 0, 0)
    195 	case glfnDetachShader:
    196 		syscall.Syscall(glDetachShader.Addr(), 2, c.args.a0, c.args.a1, 0)
    197 	case glfnDisable:
    198 		syscall.Syscall(glDisable.Addr(), 1, c.args.a0, 0, 0)
    199 	case glfnDisableVertexAttribArray:
    200 		syscall.Syscall(glDisableVertexAttribArray.Addr(), 1, c.args.a0, 0, 0)
    201 	case glfnDrawArrays:
    202 		syscall.Syscall(glDrawArrays.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    203 	case glfnDrawElements:
    204 		syscall.Syscall6(glDrawElements.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    205 	case glfnEnable:
    206 		syscall.Syscall(glEnable.Addr(), 1, c.args.a0, 0, 0)
    207 	case glfnEnableVertexAttribArray:
    208 		syscall.Syscall(glEnableVertexAttribArray.Addr(), 1, c.args.a0, 0, 0)
    209 	case glfnFinish:
    210 		syscall.Syscall(glFinish.Addr(), 0, 0, 0, 0)
    211 	case glfnFlush:
    212 		syscall.Syscall(glFlush.Addr(), 0, 0, 0, 0)
    213 	case glfnFramebufferRenderbuffer:
    214 		syscall.Syscall6(glFramebufferRenderbuffer.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    215 	case glfnFramebufferTexture2D:
    216 		syscall.Syscall6(glFramebufferTexture2D.Addr(), 5, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, 0)
    217 	case glfnFrontFace:
    218 		syscall.Syscall(glFrontFace.Addr(), 1, c.args.a0, 0, 0)
    219 	case glfnGenBuffer:
    220 		syscall.Syscall(glGenBuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&ret)), 0)
    221 	case glfnGenFramebuffer:
    222 		syscall.Syscall(glGenFramebuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&ret)), 0)
    223 	case glfnGenRenderbuffer:
    224 		syscall.Syscall(glGenRenderbuffers.Addr(), 2, 1, uintptr(unsafe.Pointer(&ret)), 0)
    225 	case glfnGenVertexArray:
    226 		syscall.Syscall(glGenVertexArrays.Addr(), 2, 1, uintptr(unsafe.Pointer(&ret)), 0)
    227 	case glfnGenTexture:
    228 		syscall.Syscall(glGenTextures.Addr(), 2, 1, uintptr(unsafe.Pointer(&ret)), 0)
    229 	case glfnGenerateMipmap:
    230 		syscall.Syscall(glGenerateMipmap.Addr(), 1, c.args.a0, 0, 0)
    231 	case glfnGetActiveAttrib:
    232 		syscall.Syscall9(glGetActiveAttrib.Addr(), 7, c.args.a0, c.args.a1, c.args.a2, 0, uintptr(unsafe.Pointer(&ret)), c.args.a3, uintptr(c.parg), 0, 0)
    233 	case glfnGetActiveUniform:
    234 		syscall.Syscall9(glGetActiveUniform.Addr(), 7, c.args.a0, c.args.a1, c.args.a2, 0, uintptr(unsafe.Pointer(&ret)), c.args.a3, uintptr(c.parg), 0, 0)
    235 	case glfnGetAttachedShaders:
    236 		syscall.Syscall6(glGetAttachedShaders.Addr(), 4, c.args.a0, c.args.a1, uintptr(unsafe.Pointer(&ret)), uintptr(c.parg), 0, 0)
    237 	case glfnGetAttribLocation:
    238 		ret, _, _ = syscall.Syscall(glGetAttribLocation.Addr(), 2, c.args.a0, c.args.a1, 0)
    239 	case glfnGetBooleanv:
    240 		syscall.Syscall(glGetBooleanv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    241 	case glfnGetBufferParameteri:
    242 		syscall.Syscall(glGetBufferParameteri.Addr(), 3, c.args.a0, c.args.a1, uintptr(unsafe.Pointer(&ret)))
    243 	case glfnGetError:
    244 		ret, _, _ = syscall.Syscall(glGetError.Addr(), 0, 0, 0, 0)
    245 	case glfnGetFloatv:
    246 		syscall.Syscall(glGetFloatv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    247 	case glfnGetFramebufferAttachmentParameteriv:
    248 		syscall.Syscall6(glGetFramebufferAttachmentParameteriv.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, uintptr(unsafe.Pointer(&ret)), 0, 0)
    249 	case glfnGetIntegerv:
    250 		syscall.Syscall(glGetIntegerv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    251 	case glfnGetProgramInfoLog:
    252 		syscall.Syscall6(glGetProgramInfoLog.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    253 	case glfnGetProgramiv:
    254 		syscall.Syscall(glGetProgramiv.Addr(), 3, c.args.a0, c.args.a1, uintptr(unsafe.Pointer(&ret)))
    255 	case glfnGetRenderbufferParameteriv:
    256 		syscall.Syscall(glGetRenderbufferParameteriv.Addr(), 3, c.args.a0, c.args.a1, uintptr(unsafe.Pointer(&ret)))
    257 	case glfnGetShaderInfoLog:
    258 		syscall.Syscall6(glGetShaderInfoLog.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    259 	case glfnGetShaderPrecisionFormat:
    260 		// c.parg is a [3]int32. The first [2]int32 of the array is one
    261 		// parameter, the final *int32 is another parameter.
    262 		syscall.Syscall6(glGetShaderPrecisionFormat.Addr(), 4, c.args.a0, c.args.a1, uintptr(c.parg), uintptr(c.parg)+2*unsafe.Sizeof(uintptr(0)), 0, 0)
    263 	case glfnGetShaderSource:
    264 		syscall.Syscall6(glGetShaderSource.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    265 	case glfnGetShaderiv:
    266 		syscall.Syscall(glGetShaderiv.Addr(), 3, c.args.a0, c.args.a1, uintptr(unsafe.Pointer(&ret)))
    267 	case glfnGetString:
    268 		ret, _, _ = syscall.Syscall(glGetString.Addr(), 1, c.args.a0, 0, 0)
    269 	case glfnGetTexParameterfv:
    270 		syscall.Syscall(glGetTexParameterfv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    271 	case glfnGetTexParameteriv:
    272 		syscall.Syscall(glGetTexParameteriv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    273 	case glfnGetUniformLocation:
    274 		ret, _, _ = syscall.Syscall(glGetUniformLocation.Addr(), 2, c.args.a0, c.args.a1, 0)
    275 	case glfnGetUniformfv:
    276 		syscall.Syscall(glGetUniformfv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    277 	case glfnGetUniformiv:
    278 		syscall.Syscall(glGetUniformiv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    279 	case glfnGetVertexAttribfv:
    280 		syscall.Syscall(glGetVertexAttribfv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    281 	case glfnGetVertexAttribiv:
    282 		syscall.Syscall(glGetVertexAttribiv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    283 	case glfnHint:
    284 		syscall.Syscall(glHint.Addr(), 2, c.args.a0, c.args.a1, 0)
    285 	case glfnIsBuffer:
    286 		syscall.Syscall(glIsBuffer.Addr(), 1, c.args.a0, 0, 0)
    287 	case glfnIsEnabled:
    288 		syscall.Syscall(glIsEnabled.Addr(), 1, c.args.a0, 0, 0)
    289 	case glfnIsFramebuffer:
    290 		syscall.Syscall(glIsFramebuffer.Addr(), 1, c.args.a0, 0, 0)
    291 	case glfnIsProgram:
    292 		ret, _, _ = syscall.Syscall(glIsProgram.Addr(), 1, c.args.a0, 0, 0)
    293 	case glfnIsRenderbuffer:
    294 		syscall.Syscall(glIsRenderbuffer.Addr(), 1, c.args.a0, 0, 0)
    295 	case glfnIsShader:
    296 		syscall.Syscall(glIsShader.Addr(), 1, c.args.a0, 0, 0)
    297 	case glfnIsTexture:
    298 		syscall.Syscall(glIsTexture.Addr(), 1, c.args.a0, 0, 0)
    299 	case glfnLineWidth:
    300 		syscall.Syscall(glLineWidth.Addr(), 1, c.args.a0, 0, 0)
    301 	case glfnLinkProgram:
    302 		syscall.Syscall(glLinkProgram.Addr(), 1, c.args.a0, 0, 0)
    303 	case glfnPixelStorei:
    304 		syscall.Syscall(glPixelStorei.Addr(), 2, c.args.a0, c.args.a1, 0)
    305 	case glfnPolygonOffset:
    306 		syscall.Syscall6(glPolygonOffset.Addr(), 2, c.args.a0, c.args.a1, 0, 0, 0, 0)
    307 	case glfnReadPixels:
    308 		syscall.Syscall9(glReadPixels.Addr(), 7, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, uintptr(c.parg), 0, 0)
    309 	case glfnReleaseShaderCompiler:
    310 		syscall.Syscall(glReleaseShaderCompiler.Addr(), 0, 0, 0, 0)
    311 	case glfnRenderbufferStorage:
    312 		syscall.Syscall6(glRenderbufferStorage.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    313 	case glfnSampleCoverage:
    314 		syscall.Syscall6(glSampleCoverage.Addr(), 1, c.args.a0, 0, 0, 0, 0, 0)
    315 	case glfnScissor:
    316 		syscall.Syscall6(glScissor.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    317 	case glfnShaderSource:
    318 		syscall.Syscall6(glShaderSource.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, 0, 0, 0)
    319 	case glfnStencilFunc:
    320 		syscall.Syscall(glStencilFunc.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    321 	case glfnStencilFuncSeparate:
    322 		syscall.Syscall6(glStencilFuncSeparate.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    323 	case glfnStencilMask:
    324 		syscall.Syscall(glStencilMask.Addr(), 1, c.args.a0, 0, 0)
    325 	case glfnStencilMaskSeparate:
    326 		syscall.Syscall(glStencilMaskSeparate.Addr(), 2, c.args.a0, c.args.a1, 0)
    327 	case glfnStencilOp:
    328 		syscall.Syscall(glStencilOp.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    329 	case glfnStencilOpSeparate:
    330 		syscall.Syscall6(glStencilOpSeparate.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    331 	case glfnTexImage2D:
    332 		syscall.Syscall9(glTexImage2D.Addr(), 9, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, 0, c.args.a5, c.args.a6, uintptr(c.parg))
    333 	case glfnTexParameterf:
    334 		syscall.Syscall6(glTexParameterf.Addr(), 3, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    335 	case glfnTexParameterfv:
    336 		syscall.Syscall(glTexParameterfv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    337 	case glfnTexParameteri:
    338 		syscall.Syscall(glTexParameteri.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    339 	case glfnTexParameteriv:
    340 		syscall.Syscall(glTexParameteriv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    341 	case glfnTexSubImage2D:
    342 		syscall.Syscall9(glTexSubImage2D.Addr(), 9, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5, c.args.a6, c.args.a7, uintptr(c.parg))
    343 	case glfnUniform1f:
    344 		syscall.Syscall6(glUniform1f.Addr(), 2, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    345 	case glfnUniform1fv:
    346 		syscall.Syscall(glUniform1fv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    347 	case glfnUniform1i:
    348 		syscall.Syscall(glUniform1i.Addr(), 2, c.args.a0, c.args.a1, 0)
    349 	case glfnUniform1iv:
    350 		syscall.Syscall(glUniform1iv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    351 	case glfnUniform2f:
    352 		syscall.Syscall6(glUniform2f.Addr(), 3, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    353 	case glfnUniform2fv:
    354 		syscall.Syscall(glUniform2fv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    355 	case glfnUniform2i:
    356 		syscall.Syscall(glUniform2i.Addr(), 3, c.args.a0, c.args.a1, c.args.a2)
    357 	case glfnUniform2iv:
    358 		syscall.Syscall(glUniform2iv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    359 	case glfnUniform3f:
    360 		syscall.Syscall6(glUniform3f.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    361 	case glfnUniform3fv:
    362 		syscall.Syscall(glUniform3fv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    363 	case glfnUniform3i:
    364 		syscall.Syscall6(glUniform3i.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    365 	case glfnUniform3iv:
    366 		syscall.Syscall(glUniform3iv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    367 	case glfnUniform4f:
    368 		syscall.Syscall6(glUniform4f.Addr(), 5, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    369 	case glfnUniform4fv:
    370 		syscall.Syscall(glUniform4fv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    371 	case glfnUniform4i:
    372 		syscall.Syscall6(glUniform4i.Addr(), 5, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, 0)
    373 	case glfnUniform4iv:
    374 		syscall.Syscall(glUniform4iv.Addr(), 3, c.args.a0, c.args.a1, uintptr(c.parg))
    375 	case glfnUniformMatrix2fv:
    376 		syscall.Syscall6(glUniformMatrix2fv.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    377 	case glfnUniformMatrix3fv:
    378 		syscall.Syscall6(glUniformMatrix3fv.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    379 	case glfnUniformMatrix4fv:
    380 		syscall.Syscall6(glUniformMatrix4fv.Addr(), 4, c.args.a0, c.args.a1, 0, uintptr(c.parg), 0, 0)
    381 	case glfnUseProgram:
    382 		syscall.Syscall(glUseProgram.Addr(), 1, c.args.a0, 0, 0)
    383 	case glfnValidateProgram:
    384 		syscall.Syscall(glValidateProgram.Addr(), 1, c.args.a0, 0, 0)
    385 	case glfnVertexAttrib1f:
    386 		syscall.Syscall6(glVertexAttrib1f.Addr(), 2, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    387 	case glfnVertexAttrib1fv:
    388 		syscall.Syscall(glVertexAttrib1fv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    389 	case glfnVertexAttrib2f:
    390 		syscall.Syscall6(glVertexAttrib2f.Addr(), 3, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    391 	case glfnVertexAttrib2fv:
    392 		syscall.Syscall(glVertexAttrib2fv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    393 	case glfnVertexAttrib3f:
    394 		syscall.Syscall6(glVertexAttrib3f.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    395 	case glfnVertexAttrib3fv:
    396 		syscall.Syscall(glVertexAttrib3fv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    397 	case glfnVertexAttrib4f:
    398 		syscall.Syscall6(glVertexAttrib4f.Addr(), 5, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    399 	case glfnVertexAttrib4fv:
    400 		syscall.Syscall(glVertexAttrib4fv.Addr(), 2, c.args.a0, uintptr(c.parg), 0)
    401 	case glfnVertexAttribPointer:
    402 		syscall.Syscall6(glVertexAttribPointer.Addr(), 6, c.args.a0, c.args.a1, c.args.a2, c.args.a3, c.args.a4, c.args.a5)
    403 	case glfnViewport:
    404 		syscall.Syscall6(glViewport.Addr(), 4, c.args.a0, c.args.a1, c.args.a2, c.args.a3, 0, 0)
    405 	default:
    406 		panic("unknown GL function")
    407 	}
    408 
    409 	return ret
    410 }
    411 
    412 // Exported libraries for a Windows GUI driver.
    413 //
    414 // LibEGL is not used directly by the gl package, but is needed by any
    415 // driver hoping to use OpenGL ES.
    416 //
    417 // LibD3DCompiler is needed by libglesv2.dll for compiling shaders.
    418 var (
    419 	LibGLESv2      = syscall.NewLazyDLL("libglesv2.dll")
    420 	LibEGL         = syscall.NewLazyDLL("libegl.dll")
    421 	LibD3DCompiler = syscall.NewLazyDLL("d3dcompiler_47.dll")
    422 )
    423 
    424 var (
    425 	libGLESv2                             = LibGLESv2
    426 	glActiveTexture                       = libGLESv2.NewProc("glActiveTexture")
    427 	glAttachShader                        = libGLESv2.NewProc("glAttachShader")
    428 	glBindAttribLocation                  = libGLESv2.NewProc("glBindAttribLocation")
    429 	glBindBuffer                          = libGLESv2.NewProc("glBindBuffer")
    430 	glBindFramebuffer                     = libGLESv2.NewProc("glBindFramebuffer")
    431 	glBindRenderbuffer                    = libGLESv2.NewProc("glBindRenderbuffer")
    432 	glBindTexture                         = libGLESv2.NewProc("glBindTexture")
    433 	glBindVertexArray                     = libGLESv2.NewProc("glBindVertexArray")
    434 	glBlendColor                          = libGLESv2.NewProc("glBlendColor")
    435 	glBlendEquation                       = libGLESv2.NewProc("glBlendEquation")
    436 	glBlendEquationSeparate               = libGLESv2.NewProc("glBlendEquationSeparate")
    437 	glBlendFunc                           = libGLESv2.NewProc("glBlendFunc")
    438 	glBlendFuncSeparate                   = libGLESv2.NewProc("glBlendFuncSeparate")
    439 	glBufferData                          = libGLESv2.NewProc("glBufferData")
    440 	glBufferSubData                       = libGLESv2.NewProc("glBufferSubData")
    441 	glCheckFramebufferStatus              = libGLESv2.NewProc("glCheckFramebufferStatus")
    442 	glClear                               = libGLESv2.NewProc("glClear")
    443 	glClearColor                          = libGLESv2.NewProc("glClearColor")
    444 	glClearDepthf                         = libGLESv2.NewProc("glClearDepthf")
    445 	glClearStencil                        = libGLESv2.NewProc("glClearStencil")
    446 	glColorMask                           = libGLESv2.NewProc("glColorMask")
    447 	glCompileShader                       = libGLESv2.NewProc("glCompileShader")
    448 	glCompressedTexImage2D                = libGLESv2.NewProc("glCompressedTexImage2D")
    449 	glCompressedTexSubImage2D             = libGLESv2.NewProc("glCompressedTexSubImage2D")
    450 	glCopyTexImage2D                      = libGLESv2.NewProc("glCopyTexImage2D")
    451 	glCopyTexSubImage2D                   = libGLESv2.NewProc("glCopyTexSubImage2D")
    452 	glCreateProgram                       = libGLESv2.NewProc("glCreateProgram")
    453 	glCreateShader                        = libGLESv2.NewProc("glCreateShader")
    454 	glCullFace                            = libGLESv2.NewProc("glCullFace")
    455 	glDeleteBuffers                       = libGLESv2.NewProc("glDeleteBuffers")
    456 	glDeleteFramebuffers                  = libGLESv2.NewProc("glDeleteFramebuffers")
    457 	glDeleteProgram                       = libGLESv2.NewProc("glDeleteProgram")
    458 	glDeleteRenderbuffers                 = libGLESv2.NewProc("glDeleteRenderbuffers")
    459 	glDeleteShader                        = libGLESv2.NewProc("glDeleteShader")
    460 	glDeleteTextures                      = libGLESv2.NewProc("glDeleteTextures")
    461 	glDeleteVertexArrays                  = libGLESv2.NewProc("glDeleteVertexArrays")
    462 	glDepthFunc                           = libGLESv2.NewProc("glDepthFunc")
    463 	glDepthRangef                         = libGLESv2.NewProc("glDepthRangef")
    464 	glDepthMask                           = libGLESv2.NewProc("glDepthMask")
    465 	glDetachShader                        = libGLESv2.NewProc("glDetachShader")
    466 	glDisable                             = libGLESv2.NewProc("glDisable")
    467 	glDisableVertexAttribArray            = libGLESv2.NewProc("glDisableVertexAttribArray")
    468 	glDrawArrays                          = libGLESv2.NewProc("glDrawArrays")
    469 	glDrawElements                        = libGLESv2.NewProc("glDrawElements")
    470 	glEnable                              = libGLESv2.NewProc("glEnable")
    471 	glEnableVertexAttribArray             = libGLESv2.NewProc("glEnableVertexAttribArray")
    472 	glFinish                              = libGLESv2.NewProc("glFinish")
    473 	glFlush                               = libGLESv2.NewProc("glFlush")
    474 	glFramebufferRenderbuffer             = libGLESv2.NewProc("glFramebufferRenderbuffer")
    475 	glFramebufferTexture2D                = libGLESv2.NewProc("glFramebufferTexture2D")
    476 	glFrontFace                           = libGLESv2.NewProc("glFrontFace")
    477 	glGenBuffers                          = libGLESv2.NewProc("glGenBuffers")
    478 	glGenFramebuffers                     = libGLESv2.NewProc("glGenFramebuffers")
    479 	glGenRenderbuffers                    = libGLESv2.NewProc("glGenRenderbuffers")
    480 	glGenTextures                         = libGLESv2.NewProc("glGenTextures")
    481 	glGenVertexArrays                     = libGLESv2.NewProc("glGenVertexArrays")
    482 	glGenerateMipmap                      = libGLESv2.NewProc("glGenerateMipmap")
    483 	glGetActiveAttrib                     = libGLESv2.NewProc("glGetActiveAttrib")
    484 	glGetActiveUniform                    = libGLESv2.NewProc("glGetActiveUniform")
    485 	glGetAttachedShaders                  = libGLESv2.NewProc("glGetAttachedShaders")
    486 	glGetAttribLocation                   = libGLESv2.NewProc("glGetAttribLocation")
    487 	glGetBooleanv                         = libGLESv2.NewProc("glGetBooleanv")
    488 	glGetBufferParameteri                 = libGLESv2.NewProc("glGetBufferParameteri")
    489 	glGetError                            = libGLESv2.NewProc("glGetError")
    490 	glGetFloatv                           = libGLESv2.NewProc("glGetFloatv")
    491 	glGetFramebufferAttachmentParameteriv = libGLESv2.NewProc("glGetFramebufferAttachmentParameteriv")
    492 	glGetIntegerv                         = libGLESv2.NewProc("glGetIntegerv")
    493 	glGetProgramInfoLog                   = libGLESv2.NewProc("glGetProgramInfoLog")
    494 	glGetProgramiv                        = libGLESv2.NewProc("glGetProgramiv")
    495 	glGetRenderbufferParameteriv          = libGLESv2.NewProc("glGetRenderbufferParameteriv")
    496 	glGetShaderInfoLog                    = libGLESv2.NewProc("glGetShaderInfoLog")
    497 	glGetShaderPrecisionFormat            = libGLESv2.NewProc("glGetShaderPrecisionFormat")
    498 	glGetShaderSource                     = libGLESv2.NewProc("glGetShaderSource")
    499 	glGetShaderiv                         = libGLESv2.NewProc("glGetShaderiv")
    500 	glGetString                           = libGLESv2.NewProc("glGetString")
    501 	glGetTexParameterfv                   = libGLESv2.NewProc("glGetTexParameterfv")
    502 	glGetTexParameteriv                   = libGLESv2.NewProc("glGetTexParameteriv")
    503 	glGetUniformLocation                  = libGLESv2.NewProc("glGetUniformLocation")
    504 	glGetUniformfv                        = libGLESv2.NewProc("glGetUniformfv")
    505 	glGetUniformiv                        = libGLESv2.NewProc("glGetUniformiv")
    506 	glGetVertexAttribfv                   = libGLESv2.NewProc("glGetVertexAttribfv")
    507 	glGetVertexAttribiv                   = libGLESv2.NewProc("glGetVertexAttribiv")
    508 	glHint                                = libGLESv2.NewProc("glHint")
    509 	glIsBuffer                            = libGLESv2.NewProc("glIsBuffer")
    510 	glIsEnabled                           = libGLESv2.NewProc("glIsEnabled")
    511 	glIsFramebuffer                       = libGLESv2.NewProc("glIsFramebuffer")
    512 	glIsProgram                           = libGLESv2.NewProc("glIsProgram")
    513 	glIsRenderbuffer                      = libGLESv2.NewProc("glIsRenderbuffer")
    514 	glIsShader                            = libGLESv2.NewProc("glIsShader")
    515 	glIsTexture                           = libGLESv2.NewProc("glIsTexture")
    516 	glLineWidth                           = libGLESv2.NewProc("glLineWidth")
    517 	glLinkProgram                         = libGLESv2.NewProc("glLinkProgram")
    518 	glPixelStorei                         = libGLESv2.NewProc("glPixelStorei")
    519 	glPolygonOffset                       = libGLESv2.NewProc("glPolygonOffset")
    520 	glReadPixels                          = libGLESv2.NewProc("glReadPixels")
    521 	glReleaseShaderCompiler               = libGLESv2.NewProc("glReleaseShaderCompiler")
    522 	glRenderbufferStorage                 = libGLESv2.NewProc("glRenderbufferStorage")
    523 	glSampleCoverage                      = libGLESv2.NewProc("glSampleCoverage")
    524 	glScissor                             = libGLESv2.NewProc("glScissor")
    525 	glShaderSource                        = libGLESv2.NewProc("glShaderSource")
    526 	glStencilFunc                         = libGLESv2.NewProc("glStencilFunc")
    527 	glStencilFuncSeparate                 = libGLESv2.NewProc("glStencilFuncSeparate")
    528 	glStencilMask                         = libGLESv2.NewProc("glStencilMask")
    529 	glStencilMaskSeparate                 = libGLESv2.NewProc("glStencilMaskSeparate")
    530 	glStencilOp                           = libGLESv2.NewProc("glStencilOp")
    531 	glStencilOpSeparate                   = libGLESv2.NewProc("glStencilOpSeparate")
    532 	glTexImage2D                          = libGLESv2.NewProc("glTexImage2D")
    533 	glTexParameterf                       = libGLESv2.NewProc("glTexParameterf")
    534 	glTexParameterfv                      = libGLESv2.NewProc("glTexParameterfv")
    535 	glTexParameteri                       = libGLESv2.NewProc("glTexParameteri")
    536 	glTexParameteriv                      = libGLESv2.NewProc("glTexParameteriv")
    537 	glTexSubImage2D                       = libGLESv2.NewProc("glTexSubImage2D")
    538 	glUniform1f                           = libGLESv2.NewProc("glUniform1f")
    539 	glUniform1fv                          = libGLESv2.NewProc("glUniform1fv")
    540 	glUniform1i                           = libGLESv2.NewProc("glUniform1i")
    541 	glUniform1iv                          = libGLESv2.NewProc("glUniform1iv")
    542 	glUniform2f                           = libGLESv2.NewProc("glUniform2f")
    543 	glUniform2fv                          = libGLESv2.NewProc("glUniform2fv")
    544 	glUniform2i                           = libGLESv2.NewProc("glUniform2i")
    545 	glUniform2iv                          = libGLESv2.NewProc("glUniform2iv")
    546 	glUniform3f                           = libGLESv2.NewProc("glUniform3f")
    547 	glUniform3fv                          = libGLESv2.NewProc("glUniform3fv")
    548 	glUniform3i                           = libGLESv2.NewProc("glUniform3i")
    549 	glUniform3iv                          = libGLESv2.NewProc("glUniform3iv")
    550 	glUniform4f                           = libGLESv2.NewProc("glUniform4f")
    551 	glUniform4fv                          = libGLESv2.NewProc("glUniform4fv")
    552 	glUniform4i                           = libGLESv2.NewProc("glUniform4i")
    553 	glUniform4iv                          = libGLESv2.NewProc("glUniform4iv")
    554 	glUniformMatrix2fv                    = libGLESv2.NewProc("glUniformMatrix2fv")
    555 	glUniformMatrix3fv                    = libGLESv2.NewProc("glUniformMatrix3fv")
    556 	glUniformMatrix4fv                    = libGLESv2.NewProc("glUniformMatrix4fv")
    557 	glUseProgram                          = libGLESv2.NewProc("glUseProgram")
    558 	glValidateProgram                     = libGLESv2.NewProc("glValidateProgram")
    559 	glVertexAttrib1f                      = libGLESv2.NewProc("glVertexAttrib1f")
    560 	glVertexAttrib1fv                     = libGLESv2.NewProc("glVertexAttrib1fv")
    561 	glVertexAttrib2f                      = libGLESv2.NewProc("glVertexAttrib2f")
    562 	glVertexAttrib2fv                     = libGLESv2.NewProc("glVertexAttrib2fv")
    563 	glVertexAttrib3f                      = libGLESv2.NewProc("glVertexAttrib3f")
    564 	glVertexAttrib3fv                     = libGLESv2.NewProc("glVertexAttrib3fv")
    565 	glVertexAttrib4f                      = libGLESv2.NewProc("glVertexAttrib4f")
    566 	glVertexAttrib4fv                     = libGLESv2.NewProc("glVertexAttrib4fv")
    567 	glVertexAttribPointer                 = libGLESv2.NewProc("glVertexAttribPointer")
    568 	glViewport                            = libGLESv2.NewProc("glViewport")
    569 )