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gecko-dev/dom/canvas/WebGLProgram.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLProgram.h"
#include "GLContext.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/WebGL2RenderingContextBinding.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "mozilla/RefPtr.h"
#include "nsPrintfCString.h"
#include "WebGLActiveInfo.h"
#include "WebGLBuffer.h"
#include "WebGLContext.h"
#include "WebGLShader.h"
#include "WebGLTransformFeedback.h"
#include "WebGLUniformLocation.h"
#include "WebGLValidateStrings.h"
#include "WebGLVertexArray.h"
namespace mozilla {
/* If `name`: "foo[3]"
* Then returns true, with
* `out_baseName`: "foo"
* `out_isArray`: true
* `out_index`: 3
*
* If `name`: "foo"
* Then returns true, with
* `out_baseName`: "foo"
* `out_isArray`: false
* `out_index`: 0
*/
static bool
ParseName(const nsCString& name, nsCString* const out_baseName,
bool* const out_isArray, size_t* const out_arrayIndex)
{
int32_t indexEnd = name.RFind("]");
if (indexEnd == -1 ||
(uint32_t)indexEnd != name.Length() - 1)
{
*out_baseName = name;
*out_isArray = false;
*out_arrayIndex = 0;
return true;
}
int32_t indexOpenBracket = name.RFind("[");
if (indexOpenBracket == -1)
return false;
uint32_t indexStart = indexOpenBracket + 1;
uint32_t indexLen = indexEnd - indexStart;
if (indexLen == 0)
return false;
const nsAutoCString indexStr(Substring(name, indexStart, indexLen));
nsresult errorcode;
int32_t indexNum = indexStr.ToInteger(&errorcode);
if (NS_FAILED(errorcode))
return false;
if (indexNum < 0)
return false;
*out_baseName = StringHead(name, indexOpenBracket);
*out_isArray = true;
*out_arrayIndex = indexNum;
return true;
}
static void
AssembleName(const nsCString& baseName, bool isArray, size_t arrayIndex,
nsCString* const out_name)
{
*out_name = baseName;
if (isArray) {
out_name->Append('[');
out_name->AppendInt(uint64_t(arrayIndex));
out_name->Append(']');
}
}
////
static GLenum
AttribBaseType(GLenum attribType)
{
switch (attribType) {
case LOCAL_GL_FLOAT:
case LOCAL_GL_FLOAT_VEC2:
case LOCAL_GL_FLOAT_VEC3:
case LOCAL_GL_FLOAT_VEC4:
case LOCAL_GL_FLOAT_MAT2:
case LOCAL_GL_FLOAT_MAT2x3:
case LOCAL_GL_FLOAT_MAT2x4:
case LOCAL_GL_FLOAT_MAT3x2:
case LOCAL_GL_FLOAT_MAT3:
case LOCAL_GL_FLOAT_MAT3x4:
case LOCAL_GL_FLOAT_MAT4x2:
case LOCAL_GL_FLOAT_MAT4x3:
case LOCAL_GL_FLOAT_MAT4:
return LOCAL_GL_FLOAT;
case LOCAL_GL_INT:
case LOCAL_GL_INT_VEC2:
case LOCAL_GL_INT_VEC3:
case LOCAL_GL_INT_VEC4:
return LOCAL_GL_INT;
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_UNSIGNED_INT_VEC2:
case LOCAL_GL_UNSIGNED_INT_VEC3:
case LOCAL_GL_UNSIGNED_INT_VEC4:
return LOCAL_GL_UNSIGNED_INT;
default:
MOZ_ASSERT(false, "unexpected attrib elemType");
return 0;
}
}
////
/*static*/ const webgl::UniformInfo::TexListT*
webgl::UniformInfo::GetTexList(WebGLActiveInfo* activeInfo)
{
const auto& webgl = activeInfo->mWebGL;
switch (activeInfo->mElemType) {
case LOCAL_GL_SAMPLER_2D:
case LOCAL_GL_SAMPLER_2D_SHADOW:
case LOCAL_GL_INT_SAMPLER_2D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D:
return &webgl->mBound2DTextures;
case LOCAL_GL_SAMPLER_CUBE:
case LOCAL_GL_SAMPLER_CUBE_SHADOW:
case LOCAL_GL_INT_SAMPLER_CUBE:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_CUBE:
return &webgl->mBoundCubeMapTextures;
case LOCAL_GL_SAMPLER_3D:
case LOCAL_GL_INT_SAMPLER_3D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_3D:
return &webgl->mBound3DTextures;
case LOCAL_GL_SAMPLER_2D_ARRAY:
case LOCAL_GL_SAMPLER_2D_ARRAY_SHADOW:
case LOCAL_GL_INT_SAMPLER_2D_ARRAY:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
return &webgl->mBound2DArrayTextures;
default:
return nullptr;
}
}
webgl::UniformInfo::UniformInfo(WebGLActiveInfo* activeInfo)
: mActiveInfo(activeInfo)
, mSamplerTexList(GetTexList(activeInfo))
{
if (mSamplerTexList) {
mSamplerValues.assign(mActiveInfo->mElemCount, 0);
}
}
//////////
//#define DUMP_SHADERVAR_MAPPINGS
static already_AddRefed<const webgl::LinkedProgramInfo>
QueryProgramInfo(WebGLProgram* prog, gl::GLContext* gl)
{
WebGLContext* const webgl = prog->mContext;
RefPtr<webgl::LinkedProgramInfo> info(new webgl::LinkedProgramInfo(prog));
GLuint maxAttribLenWithNull = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_ATTRIBUTE_MAX_LENGTH,
(GLint*)&maxAttribLenWithNull);
if (maxAttribLenWithNull < 1)
maxAttribLenWithNull = 1;
GLuint maxUniformLenWithNull = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_UNIFORM_MAX_LENGTH,
(GLint*)&maxUniformLenWithNull);
if (maxUniformLenWithNull < 1)
maxUniformLenWithNull = 1;
GLuint maxUniformBlockLenWithNull = 0;
if (gl->IsSupported(gl::GLFeature::uniform_buffer_object)) {
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH,
(GLint*)&maxUniformBlockLenWithNull);
if (maxUniformBlockLenWithNull < 1)
maxUniformBlockLenWithNull = 1;
}
GLuint maxTransformFeedbackVaryingLenWithNull = 0;
if (gl->IsSupported(gl::GLFeature::transform_feedback2)) {
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH,
(GLint*)&maxTransformFeedbackVaryingLenWithNull);
if (maxTransformFeedbackVaryingLenWithNull < 1)
maxTransformFeedbackVaryingLenWithNull = 1;
}
// Attribs (can't be arrays)
GLuint numActiveAttribs = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_ATTRIBUTES,
(GLint*)&numActiveAttribs);
for (GLuint i = 0; i < numActiveAttribs; i++) {
nsAutoCString mappedName;
mappedName.SetLength(maxAttribLenWithNull - 1);
GLsizei lengthWithoutNull = 0;
GLint elemCount = 0; // `size`
GLenum elemType = 0; // `type`
gl->fGetActiveAttrib(prog->mGLName, i, mappedName.Length()+1, &lengthWithoutNull,
&elemCount, &elemType, mappedName.BeginWriting());
GLenum error = gl->fGetError();
if (error != LOCAL_GL_NO_ERROR) {
gfxCriticalNote << "Failed to do glGetActiveAttrib: " << error;
}
mappedName.SetLength(lengthWithoutNull);
////
nsCString userName;
if (!prog->FindAttribUserNameByMappedName(mappedName, &userName)) {
userName = mappedName;
}
///////
GLint loc = gl->fGetAttribLocation(prog->mGLName,
mappedName.BeginReading());
if (gl->WorkAroundDriverBugs() &&
mappedName.EqualsIgnoreCase("gl_", 3))
{
// Bug 1328559: Appears problematic on ANGLE and OSX, but not Linux or Win+GL.
loc = -1;
}
#ifdef DUMP_SHADERVAR_MAPPINGS
printf_stderr("[attrib %u/%u] @%i %s->%s\n", i, numActiveAttribs, loc,
userName.BeginReading(), mappedName.BeginReading());
#endif
MOZ_ASSERT_IF(mappedName.EqualsIgnoreCase("gl_", 3), loc == -1);
///////
const bool isArray = false;
const RefPtr<WebGLActiveInfo> activeInfo = new WebGLActiveInfo(webgl, elemCount,
elemType, isArray,
userName,
mappedName);
const GLenum baseType = AttribBaseType(elemType);
const webgl::AttribInfo attrib = {activeInfo, loc, baseType};
info->attribs.push_back(attrib);
if (loc == 0) {
info->attrib0Active = true;
}
}
// Uniforms (can be basically anything)
const bool needsCheckForArrays = gl->WorkAroundDriverBugs();
GLuint numActiveUniforms = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_UNIFORMS,
(GLint*)&numActiveUniforms);
for (GLuint i = 0; i < numActiveUniforms; i++) {
nsAutoCString mappedName;
mappedName.SetLength(maxUniformLenWithNull - 1);
GLsizei lengthWithoutNull = 0;
GLint elemCount = 0; // `size`
GLenum elemType = 0; // `type`
gl->fGetActiveUniform(prog->mGLName, i, mappedName.Length()+1, &lengthWithoutNull,
&elemCount, &elemType, mappedName.BeginWriting());
mappedName.SetLength(lengthWithoutNull);
///////
nsAutoCString baseMappedName;
bool isArray;
size_t arrayIndex;
if (!ParseName(mappedName, &baseMappedName, &isArray, &arrayIndex))
MOZ_CRASH("GFX: Failed to parse `mappedName` received from driver.");
// Note that for good drivers, `isArray` should already be correct.
// However, if FindUniform succeeds, it will be validator-guaranteed correct.
///////
nsAutoCString baseUserName;
if (!prog->FindUniformByMappedName(baseMappedName, &baseUserName, &isArray)) {
// Validator likely missing.
baseUserName = baseMappedName;
if (needsCheckForArrays && !isArray) {
// By GLES 3, GetUniformLocation("foo[0]") should return -1 if `foo` is
// not an array. Our current linux Try slaves return the location of `foo`
// anyways, though.
std::string mappedNameStr = baseMappedName.BeginReading();
mappedNameStr += "[0]";
GLint loc = gl->fGetUniformLocation(prog->mGLName, mappedNameStr.c_str());
if (loc != -1)
isArray = true;
}
}
///////
#ifdef DUMP_SHADERVAR_MAPPINGS
printf_stderr("[uniform %u/%u] %s->%s\n", i, numActiveUniforms,
baseUserName.BeginReading(), mappedName.BeginReading());
#endif
///////
const RefPtr<WebGLActiveInfo> activeInfo = new WebGLActiveInfo(webgl, elemCount,
elemType, isArray,
baseUserName,
baseMappedName);
auto* uniform = new webgl::UniformInfo(activeInfo);
info->uniforms.push_back(uniform);
if (uniform->mSamplerTexList) {
info->uniformSamplers.push_back(uniform);
}
}
// Uniform Blocks (can be arrays, but can't contain sampler types)
if (gl->IsSupported(gl::GLFeature::uniform_buffer_object)) {
GLuint numActiveUniformBlocks = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_ACTIVE_UNIFORM_BLOCKS,
(GLint*)&numActiveUniformBlocks);
for (GLuint i = 0; i < numActiveUniformBlocks; i++) {
nsAutoCString mappedName;
mappedName.SetLength(maxUniformBlockLenWithNull - 1);
GLint lengthWithoutNull;
gl->fGetActiveUniformBlockiv(prog->mGLName, i, LOCAL_GL_UNIFORM_BLOCK_NAME_LENGTH, &lengthWithoutNull);
gl->fGetActiveUniformBlockName(prog->mGLName, i, maxUniformBlockLenWithNull, &lengthWithoutNull, mappedName.BeginWriting());
mappedName.SetLength(lengthWithoutNull);
////
nsCString userName;
if (!prog->UnmapUniformBlockName(mappedName, &userName))
continue;
#ifdef DUMP_SHADERVAR_MAPPINGS
printf_stderr("[uniform block %u/%u] %s->%s\n", i, numActiveUniformBlocks,
userName.BeginReading(), mappedName.BeginReading());
#endif
////
GLuint dataSize = 0;
gl->fGetActiveUniformBlockiv(prog->mGLName, i,
LOCAL_GL_UNIFORM_BLOCK_DATA_SIZE,
(GLint*)&dataSize);
auto* block = new webgl::UniformBlockInfo(webgl, userName, mappedName,
dataSize);
info->uniformBlocks.push_back(block);
}
}
// Transform feedback varyings (can be arrays)
if (gl->IsSupported(gl::GLFeature::transform_feedback2)) {
GLuint numTransformFeedbackVaryings = 0;
gl->fGetProgramiv(prog->mGLName, LOCAL_GL_TRANSFORM_FEEDBACK_VARYINGS,
(GLint*)&numTransformFeedbackVaryings);
for (GLuint i = 0; i < numTransformFeedbackVaryings; i++) {
nsAutoCString mappedName;
mappedName.SetLength(maxTransformFeedbackVaryingLenWithNull - 1);
GLint lengthWithoutNull;
GLsizei elemCount;
GLenum elemType;
gl->fGetTransformFeedbackVarying(prog->mGLName, i,
maxTransformFeedbackVaryingLenWithNull,
&lengthWithoutNull, &elemCount, &elemType,
mappedName.BeginWriting());
mappedName.SetLength(lengthWithoutNull);
////
nsAutoCString baseMappedName;
bool isArray;
size_t arrayIndex;
if (!ParseName(mappedName, &baseMappedName, &isArray, &arrayIndex))
MOZ_CRASH("GFX: Failed to parse `mappedName` received from driver.");
nsAutoCString baseUserName;
if (!prog->FindVaryingByMappedName(mappedName, &baseUserName, &isArray)) {
baseUserName = baseMappedName;
}
////
#ifdef DUMP_SHADERVAR_MAPPINGS
printf_stderr("[transform feedback varying %u/%u] %s->%s\n", i,
numTransformFeedbackVaryings, baseUserName.BeginReading(),
mappedName.BeginReading());
#endif
const RefPtr<WebGLActiveInfo> activeInfo = new WebGLActiveInfo(webgl,
elemCount,
elemType,
isArray,
baseUserName,
mappedName);
info->transformFeedbackVaryings.push_back(activeInfo);
}
}
// Frag outputs
prog->EnumerateFragOutputs(info->fragDataMap);
return info.forget();
}
////////////////////////////////////////////////////////////////////////////////
webgl::LinkedProgramInfo::LinkedProgramInfo(WebGLProgram* prog)
: prog(prog)
, transformFeedbackBufferMode(prog->mNextLink_TransformFeedbackBufferMode)
, attrib0Active(false)
{ }
webgl::LinkedProgramInfo::~LinkedProgramInfo()
{
for (auto& cur : uniforms) {
delete cur;
}
for (auto& cur : uniformBlocks) {
delete cur;
}
}
const webgl::CachedDrawFetchLimits*
webgl::LinkedProgramInfo::GetDrawFetchLimits() const
{
const auto& webgl = prog->mContext;
const auto& vao = webgl->mBoundVertexArray;
const auto found = mDrawFetchCache.Find(vao);
if (found)
return found;
std::vector<const CacheMapInvalidator*> cacheDeps;
cacheDeps.push_back(vao.get());
cacheDeps.push_back(&webgl->mGenericVertexAttribTypeInvalidator);
{
// We have to ensure that every enabled attrib array (not just the active ones)
// has a non-null buffer.
uint32_t i = 0;
for (const auto& cur : vao->mAttribs) {
if (cur.mEnabled && !cur.mBuf) {
webgl->ErrorInvalidOperation("Vertex attrib array %u is enabled but"
" has no buffer bound.",
i);
return nullptr;
}
}
}
bool hasActiveAttrib = false;
bool hasActiveDivisor0 = false;
webgl::CachedDrawFetchLimits fetchLimits = { UINT64_MAX, UINT64_MAX };
for (const auto& progAttrib : this->attribs) {
const auto& loc = progAttrib.mLoc;
if (loc == -1)
continue;
hasActiveAttrib |= true;
const auto& attribData = vao->mAttribs[loc];
hasActiveDivisor0 |= (attribData.mDivisor == 0);
GLenum attribDataBaseType;
if (attribData.mEnabled) {
MOZ_ASSERT(attribData.mBuf);
if (attribData.mBuf->IsBoundForTF()) {
webgl->ErrorInvalidOperation("Vertex attrib %u's buffer is bound for"
" transform feedback.",
loc);
return nullptr;
}
cacheDeps.push_back(&attribData.mBuf->mFetchInvalidator);
attribDataBaseType = attribData.BaseType();
const size_t availBytes = attribData.mBuf->ByteLength();
const auto availElems = AvailGroups(availBytes, attribData.ByteOffset(),
attribData.BytesPerVertex(),
attribData.ExplicitStride());
if (attribData.mDivisor) {
const auto availInstances = CheckedInt<uint64_t>(availElems) * attribData.mDivisor;
if (availInstances.isValid()) {
fetchLimits.maxInstances = std::min(fetchLimits.maxInstances,
availInstances.value());
} // If not valid, it overflowed too large, so we're super safe.
} else {
fetchLimits.maxVerts = std::min(fetchLimits.maxVerts, availElems);
}
} else {
attribDataBaseType = webgl->mGenericVertexAttribTypes[loc];
}
if (attribDataBaseType != progAttrib.mBaseType) {
nsCString progType, dataType;
WebGLContext::EnumName(progAttrib.mBaseType, &progType);
WebGLContext::EnumName(attribDataBaseType, &dataType);
webgl->ErrorInvalidOperation("Vertex attrib %u requires data of type %s,"
" but is being supplied with type %s.",
loc, progType.BeginReading(),
dataType.BeginReading());
return nullptr;
}
}
if (hasActiveAttrib && !hasActiveDivisor0) {
webgl->ErrorInvalidOperation("One active vertex attrib (if any are active)"
" must have a divisor of 0.");
return nullptr;
}
// --
return mDrawFetchCache.Insert(vao.get(), std::move(fetchLimits), std::move(cacheDeps));
}
////////////////////////////////////////////////////////////////////////////////
// WebGLProgram
WebGLProgram::WebGLProgram(WebGLContext* webgl)
: WebGLRefCountedObject(webgl)
, mGLName(webgl->gl->fCreateProgram())
, mNumActiveTFOs(0)
, mNextLink_TransformFeedbackBufferMode(LOCAL_GL_INTERLEAVED_ATTRIBS)
{
mContext->mPrograms.insertBack(this);
}
WebGLProgram::~WebGLProgram()
{
DeleteOnce();
}
void
WebGLProgram::Delete()
{
gl::GLContext* gl = mContext->GL();
gl->fDeleteProgram(mGLName);
mVertShader = nullptr;
mFragShader = nullptr;
mMostRecentLinkInfo = nullptr;
LinkedListElement<WebGLProgram>::removeFrom(mContext->mPrograms);
}
////////////////////////////////////////////////////////////////////////////////
// GL funcs
void
WebGLProgram::AttachShader(WebGLShader* shader)
{
WebGLRefPtr<WebGLShader>* shaderSlot;
switch (shader->mType) {
case LOCAL_GL_VERTEX_SHADER:
shaderSlot = &mVertShader;
break;
case LOCAL_GL_FRAGMENT_SHADER:
shaderSlot = &mFragShader;
break;
default:
mContext->ErrorInvalidOperation("attachShader: Bad type for shader.");
return;
}
if (*shaderSlot) {
if (shader == *shaderSlot) {
mContext->ErrorInvalidOperation("attachShader: `shader` is already attached.");
} else {
mContext->ErrorInvalidOperation("attachShader: Only one of each type of"
" shader may be attached to a program.");
}
return;
}
*shaderSlot = shader;
mContext->gl->fAttachShader(mGLName, shader->mGLName);
}
void
WebGLProgram::BindAttribLocation(GLuint loc, const nsAString& name)
{
if (!ValidateGLSLVariableName(name, mContext))
return;
if (loc >= mContext->MaxVertexAttribs()) {
mContext->ErrorInvalidValue("`location` must be less than"
" MAX_VERTEX_ATTRIBS.");
return;
}
if (StringBeginsWith(name, NS_LITERAL_STRING("gl_"))) {
mContext->ErrorInvalidOperation("Can't set the location of a"
" name that starts with 'gl_'.");
return;
}
NS_LossyConvertUTF16toASCII asciiName(name);
auto res = mNextLink_BoundAttribLocs.insert({asciiName, loc});
const bool wasInserted = res.second;
if (!wasInserted) {
auto itr = res.first;
itr->second = loc;
}
}
void
WebGLProgram::DetachShader(const WebGLShader* shader)
{
MOZ_ASSERT(shader);
WebGLRefPtr<WebGLShader>* shaderSlot;
switch (shader->mType) {
case LOCAL_GL_VERTEX_SHADER:
shaderSlot = &mVertShader;
break;
case LOCAL_GL_FRAGMENT_SHADER:
shaderSlot = &mFragShader;
break;
default:
mContext->ErrorInvalidOperation("attachShader: Bad type for shader.");
return;
}
if (*shaderSlot != shader) {
mContext->ErrorInvalidOperation("detachShader: `shader` is not attached.");
return;
}
*shaderSlot = nullptr;
mContext->gl->fDetachShader(mGLName, shader->mGLName);
}
already_AddRefed<WebGLActiveInfo>
WebGLProgram::GetActiveAttrib(GLuint index) const
{
if (!mMostRecentLinkInfo) {
RefPtr<WebGLActiveInfo> ret = WebGLActiveInfo::CreateInvalid(mContext);
return ret.forget();
}
const auto& attribs = mMostRecentLinkInfo->attribs;
if (index >= attribs.size()) {
mContext->ErrorInvalidValue("`index` (%i) must be less than %s (%zu).",
index, "ACTIVE_ATTRIBS", attribs.size());
return nullptr;
}
RefPtr<WebGLActiveInfo> ret = attribs[index].mActiveInfo;
return ret.forget();
}
already_AddRefed<WebGLActiveInfo>
WebGLProgram::GetActiveUniform(GLuint index) const
{
if (!mMostRecentLinkInfo) {
// According to the spec, this can return null.
RefPtr<WebGLActiveInfo> ret = WebGLActiveInfo::CreateInvalid(mContext);
return ret.forget();
}
const auto& uniforms = mMostRecentLinkInfo->uniforms;
if (index >= uniforms.size()) {
mContext->ErrorInvalidValue("`index` (%i) must be less than %s (%zu).",
index, "ACTIVE_UNIFORMS", uniforms.size());
return nullptr;
}
RefPtr<WebGLActiveInfo> ret = uniforms[index]->mActiveInfo;
return ret.forget();
}
void
WebGLProgram::GetAttachedShaders(nsTArray<RefPtr<WebGLShader>>* const out) const
{
out->TruncateLength(0);
if (mVertShader)
out->AppendElement(mVertShader);
if (mFragShader)
out->AppendElement(mFragShader);
}
GLint
WebGLProgram::GetAttribLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext))
return -1;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return -1;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
const webgl::AttribInfo* info;
if (!LinkInfo()->FindAttrib(userName, &info))
return -1;
return GLint(info->mLoc);
}
static GLint
GetFragDataByUserName(const WebGLProgram* prog,
const nsCString& userName)
{
nsCString mappedName;
if (!prog->LinkInfo()->MapFragDataName(userName, &mappedName))
return -1;
return prog->mContext->gl->fGetFragDataLocation(prog->mGLName, mappedName.BeginReading());
}
GLint
WebGLProgram::GetFragDataLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext))
return -1;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return -1;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
#ifdef XP_MACOSX
const auto& gl = mContext->gl;
if (gl->WorkAroundDriverBugs()) {
// OSX doesn't return locs for indexed names, just the base names.
// Indicated by failure in: conformance2/programs/gl-get-frag-data-location.html
bool isArray;
size_t arrayIndex;
nsCString baseUserName;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return -1;
if (arrayIndex >= mContext->mGLMaxDrawBuffers)
return -1;
const auto baseLoc = GetFragDataByUserName(this, baseUserName);
const auto loc = baseLoc + GLint(arrayIndex);
return loc;
}
#endif
return GetFragDataByUserName(this, userName);
}
void
WebGLProgram::GetProgramInfoLog(nsAString* const out) const
{
CopyASCIItoUTF16(mLinkLog, *out);
}
static GLint
GetProgramiv(gl::GLContext* gl, GLuint program, GLenum pname)
{
GLint ret = 0;
gl->fGetProgramiv(program, pname, &ret);
return ret;
}
JS::Value
WebGLProgram::GetProgramParameter(GLenum pname) const
{
gl::GLContext* gl = mContext->gl;
if (mContext->IsWebGL2()) {
switch (pname) {
case LOCAL_GL_ACTIVE_UNIFORM_BLOCKS:
if (!IsLinked())
return JS::NumberValue(0);
return JS::NumberValue(LinkInfo()->uniformBlocks.size());
case LOCAL_GL_TRANSFORM_FEEDBACK_VARYINGS:
if (!IsLinked())
return JS::NumberValue(0);
return JS::NumberValue(LinkInfo()->transformFeedbackVaryings.size());
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
if (!IsLinked())
return JS::NumberValue(LOCAL_GL_INTERLEAVED_ATTRIBS);
return JS::NumberValue(LinkInfo()->transformFeedbackBufferMode);
}
}
switch (pname) {
case LOCAL_GL_ATTACHED_SHADERS:
return JS::NumberValue( int(bool(mVertShader.get())) + int(bool(mFragShader)) );
case LOCAL_GL_ACTIVE_UNIFORMS:
if (!IsLinked())
return JS::NumberValue(0);
return JS::NumberValue(LinkInfo()->uniforms.size());
case LOCAL_GL_ACTIVE_ATTRIBUTES:
if (!IsLinked())
return JS::NumberValue(0);
return JS::NumberValue(LinkInfo()->attribs.size());
case LOCAL_GL_DELETE_STATUS:
return JS::BooleanValue(IsDeleteRequested());
case LOCAL_GL_LINK_STATUS:
return JS::BooleanValue(IsLinked());
case LOCAL_GL_VALIDATE_STATUS:
#ifdef XP_MACOSX
// See comment in ValidateProgram.
if (gl->WorkAroundDriverBugs())
return JS::BooleanValue(true);
#endif
// Todo: Implement this in our code.
return JS::BooleanValue(bool(GetProgramiv(gl, mGLName, pname)));
default:
mContext->ErrorInvalidEnumInfo("pname", pname);
return JS::NullValue();
}
}
GLuint
WebGLProgram::GetUniformBlockIndex(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext))
return LOCAL_GL_INVALID_INDEX;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return LOCAL_GL_INVALID_INDEX;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
const webgl::UniformBlockInfo* info = nullptr;
for (const auto& cur : LinkInfo()->uniformBlocks) {
if (cur->mUserName == userName) {
info = cur;
break;
}
}
if (!info)
return LOCAL_GL_INVALID_INDEX;
const auto& mappedName = info->mMappedName;
gl::GLContext* gl = mContext->GL();
return gl->fGetUniformBlockIndex(mGLName, mappedName.BeginReading());
}
void
WebGLProgram::GetActiveUniformBlockName(GLuint uniformBlockIndex, nsAString& retval) const
{
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return;
}
const webgl::LinkedProgramInfo* linkInfo = LinkInfo();
GLuint uniformBlockCount = (GLuint) linkInfo->uniformBlocks.size();
if (uniformBlockIndex >= uniformBlockCount) {
mContext->ErrorInvalidValue("index %u invalid.", uniformBlockIndex);
return;
}
const auto& blockInfo = linkInfo->uniformBlocks[uniformBlockIndex];
retval.Assign(NS_ConvertASCIItoUTF16(blockInfo->mUserName));
}
JS::Value
WebGLProgram::GetActiveUniformBlockParam(GLuint uniformBlockIndex, GLenum pname) const
{
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return JS::NullValue();
}
const webgl::LinkedProgramInfo* linkInfo = LinkInfo();
GLuint uniformBlockCount = (GLuint)linkInfo->uniformBlocks.size();
if (uniformBlockIndex >= uniformBlockCount) {
mContext->ErrorInvalidValue("Index %u invalid.", uniformBlockIndex);
return JS::NullValue();
}
gl::GLContext* gl = mContext->GL();
GLint param = 0;
switch (pname) {
case LOCAL_GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
case LOCAL_GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
gl->fGetActiveUniformBlockiv(mGLName, uniformBlockIndex, pname, &param);
return JS::BooleanValue(bool(param));
case LOCAL_GL_UNIFORM_BLOCK_BINDING:
case LOCAL_GL_UNIFORM_BLOCK_DATA_SIZE:
case LOCAL_GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS:
gl->fGetActiveUniformBlockiv(mGLName, uniformBlockIndex, pname, &param);
return JS::NumberValue(param);
default:
MOZ_CRASH("bad `pname`.");
}
}
JS::Value
WebGLProgram::GetActiveUniformBlockActiveUniforms(JSContext* cx, GLuint uniformBlockIndex,
ErrorResult* const out_error) const
{
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return JS::NullValue();
}
const webgl::LinkedProgramInfo* linkInfo = LinkInfo();
GLuint uniformBlockCount = (GLuint)linkInfo->uniformBlocks.size();
if (uniformBlockIndex >= uniformBlockCount) {
mContext->ErrorInvalidValue("Index %u invalid.", uniformBlockIndex);
return JS::NullValue();
}
gl::GLContext* gl = mContext->GL();
GLint activeUniformCount = 0;
gl->fGetActiveUniformBlockiv(mGLName, uniformBlockIndex,
LOCAL_GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS,
&activeUniformCount);
JS::RootedObject obj(cx, dom::Uint32Array::Create(cx, mContext, activeUniformCount,
nullptr));
if (!obj) {
*out_error = NS_ERROR_OUT_OF_MEMORY;
return JS::NullValue();
}
dom::Uint32Array result;
DebugOnly<bool> inited = result.Init(obj);
MOZ_ASSERT(inited);
result.ComputeLengthAndData();
gl->fGetActiveUniformBlockiv(mGLName, uniformBlockIndex,
LOCAL_GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES,
(GLint*)result.Data());
return JS::ObjectValue(*obj);
}
already_AddRefed<WebGLUniformLocation>
WebGLProgram::GetUniformLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext))
return nullptr;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return nullptr;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
// GLES 2.0.25, Section 2.10, p35
// If the the uniform location is an array, then the location of the first
// element of that array can be retrieved by either using the name of the
// uniform array, or the name of the uniform array appended with "[0]".
nsCString mappedName;
size_t arrayIndex;
webgl::UniformInfo* info;
if (!LinkInfo()->FindUniform(userName, &mappedName, &arrayIndex, &info))
return nullptr;
gl::GLContext* gl = mContext->GL();
GLint loc = gl->fGetUniformLocation(mGLName, mappedName.BeginReading());
if (loc == -1)
return nullptr;
RefPtr<WebGLUniformLocation> locObj = new WebGLUniformLocation(mContext, LinkInfo(),
info, loc, arrayIndex);
return locObj.forget();
}
void
WebGLProgram::GetUniformIndices(const dom::Sequence<nsString>& uniformNames,
dom::Nullable< nsTArray<GLuint> >& retval) const
{
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return;
}
size_t count = uniformNames.Length();
nsTArray<GLuint>& arr = retval.SetValue();
gl::GLContext* gl = mContext->GL();
for (size_t i = 0; i < count; i++) {
const NS_LossyConvertUTF16toASCII userName(uniformNames[i]);
nsCString mappedName;
size_t arrayIndex;
webgl::UniformInfo* info;
if (!LinkInfo()->FindUniform(userName, &mappedName, &arrayIndex, &info)) {
arr.AppendElement(LOCAL_GL_INVALID_INDEX);
continue;
}
const GLchar* const mappedNameBegin = mappedName.get();
GLuint index = LOCAL_GL_INVALID_INDEX;
gl->fGetUniformIndices(mGLName, 1, &mappedNameBegin, &index);
arr.AppendElement(index);
}
}
void
WebGLProgram::UniformBlockBinding(GLuint uniformBlockIndex,
GLuint uniformBlockBinding) const
{
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return;
}
const auto& uniformBlocks = LinkInfo()->uniformBlocks;
if (uniformBlockIndex >= uniformBlocks.size()) {
mContext->ErrorInvalidValue("Index %u invalid.", uniformBlockIndex);
return;
}
const auto& uniformBlock = uniformBlocks[uniformBlockIndex];
const auto& indexedBindings = mContext->mIndexedUniformBufferBindings;
if (uniformBlockBinding >= indexedBindings.size()) {
mContext->ErrorInvalidValue("Binding %u invalid.", uniformBlockBinding);
return;
}
const auto& indexedBinding = indexedBindings[uniformBlockBinding];
////
gl::GLContext* gl = mContext->GL();
gl->fUniformBlockBinding(mGLName, uniformBlockIndex, uniformBlockBinding);
////
uniformBlock->mBinding = &indexedBinding;
}
bool
WebGLProgram::ValidateForLink()
{
if (!mVertShader || !mVertShader->IsCompiled()) {
mLinkLog.AssignLiteral("Must have a compiled vertex shader attached.");
return false;
}
if (!mFragShader || !mFragShader->IsCompiled()) {
mLinkLog.AssignLiteral("Must have an compiled fragment shader attached.");
return false;
}
if (!mFragShader->CanLinkTo(mVertShader, &mLinkLog))
return false;
const auto& gl = mContext->gl;
if (gl->WorkAroundDriverBugs() &&
mContext->mIsMesa)
{
// Bug 777028: Mesa can't handle more than 16 samplers per program,
// counting each array entry.
size_t numSamplerUniforms_upperBound = mVertShader->CalcNumSamplerUniforms() +
mFragShader->CalcNumSamplerUniforms();
if (numSamplerUniforms_upperBound > 16) {
mLinkLog.AssignLiteral("Programs with more than 16 samplers are disallowed on"
" Mesa drivers to avoid crashing.");
return false;
}
// Bug 1203135: Mesa crashes internally if we exceed the reported maximum attribute count.
if (mVertShader->NumAttributes() > mContext->MaxVertexAttribs()) {
mLinkLog.AssignLiteral("Number of attributes exceeds Mesa's reported max"
" attribute count.");
return false;
}
}
return true;
}
void
WebGLProgram::LinkProgram()
{
if (mNumActiveTFOs) {
mContext->ErrorInvalidOperation("Program is in-use by one or more active"
" transform feedback objects.");
return;
}
// as some of the validation changes program state
mLinkLog.Truncate();
mMostRecentLinkInfo = nullptr;
if (!ValidateForLink()) {
mContext->GenerateWarning("%s", mLinkLog.BeginReading());
return;
}
// Bind the attrib locations.
// This can't be done trivially, because we have to deal with mapped attrib names.
for (const auto& pair : mNextLink_BoundAttribLocs) {
const auto& name = pair.first;
const auto& index = pair.second;
mVertShader->BindAttribLocation(mGLName, name, index);
}
// Storage for transform feedback varyings before link.
// (Work around for bug seen on nVidia drivers.)
std::vector<std::string> scopedMappedTFVaryings;
if (mContext->IsWebGL2()) {
mVertShader->MapTransformFeedbackVaryings(mNextLink_TransformFeedbackVaryings,
&scopedMappedTFVaryings);
std::vector<const char*> driverVaryings;
driverVaryings.reserve(scopedMappedTFVaryings.size());
for (const auto& cur : scopedMappedTFVaryings) {
driverVaryings.push_back(cur.c_str());
}
mContext->gl->fTransformFeedbackVaryings(mGLName, driverVaryings.size(),
driverVaryings.data(),
mNextLink_TransformFeedbackBufferMode);
}
LinkAndUpdate();
if (mMostRecentLinkInfo) {
nsCString postLinkLog;
if (ValidateAfterTentativeLink(&postLinkLog))
return;
mMostRecentLinkInfo = nullptr;
mLinkLog = postLinkLog;
}
// Failed link.
if (mContext->ShouldGenerateWarnings()) {
// report shader/program infoLogs as warnings.
// note that shader compilation errors can be deferred to linkProgram,
// which is why we can't do anything in compileShader. In practice we could
// report in compileShader the translation errors generated by ANGLE,
// but it seems saner to keep a single way of obtaining shader infologs.
if (!mLinkLog.IsEmpty()) {
mContext->GenerateWarning("Failed to link, leaving the following"
" log:\n%s\n",
mLinkLog.BeginReading());
}
}
}
static uint8_t
NumUsedLocationsByElemType(GLenum elemType)
{
// GLES 3.0.4 p55
switch (elemType) {
case LOCAL_GL_FLOAT_MAT2:
case LOCAL_GL_FLOAT_MAT2x3:
case LOCAL_GL_FLOAT_MAT2x4:
return 2;
case LOCAL_GL_FLOAT_MAT3x2:
case LOCAL_GL_FLOAT_MAT3:
case LOCAL_GL_FLOAT_MAT3x4:
return 3;
case LOCAL_GL_FLOAT_MAT4x2:
case LOCAL_GL_FLOAT_MAT4x3:
case LOCAL_GL_FLOAT_MAT4:
return 4;
default:
return 1;
}
}
static uint8_t
NumComponents(GLenum elemType)
{
switch (elemType) {
case LOCAL_GL_FLOAT:
case LOCAL_GL_INT:
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_BOOL:
return 1;
case LOCAL_GL_FLOAT_VEC2:
case LOCAL_GL_INT_VEC2:
case LOCAL_GL_UNSIGNED_INT_VEC2:
case LOCAL_GL_BOOL_VEC2:
return 2;
case LOCAL_GL_FLOAT_VEC3:
case LOCAL_GL_INT_VEC3:
case LOCAL_GL_UNSIGNED_INT_VEC3:
case LOCAL_GL_BOOL_VEC3:
return 3;
case LOCAL_GL_FLOAT_VEC4:
case LOCAL_GL_INT_VEC4:
case LOCAL_GL_UNSIGNED_INT_VEC4:
case LOCAL_GL_BOOL_VEC4:
case LOCAL_GL_FLOAT_MAT2:
return 4;
case LOCAL_GL_FLOAT_MAT2x3:
case LOCAL_GL_FLOAT_MAT3x2:
return 6;
case LOCAL_GL_FLOAT_MAT2x4:
case LOCAL_GL_FLOAT_MAT4x2:
return 8;
case LOCAL_GL_FLOAT_MAT3:
return 9;
case LOCAL_GL_FLOAT_MAT3x4:
case LOCAL_GL_FLOAT_MAT4x3:
return 12;
case LOCAL_GL_FLOAT_MAT4:
return 16;
default:
MOZ_CRASH("`elemType`");
}
}
bool
WebGLProgram::ValidateAfterTentativeLink(nsCString* const out_linkLog) const
{
const auto& linkInfo = mMostRecentLinkInfo;
const auto& gl = mContext->gl;
// Check if the attrib name conflicting to uniform name
for (const auto& attrib : linkInfo->attribs) {
const auto& attribName = attrib.mActiveInfo->mBaseUserName;
for (const auto& uniform : linkInfo->uniforms) {
const auto& uniformName = uniform->mActiveInfo->mBaseUserName;
if (attribName == uniformName) {
*out_linkLog = nsPrintfCString("Attrib name conflicts with uniform name:"
" %s",
attribName.BeginReading());
return false;
}
}
}
std::map<uint32_t, const webgl::AttribInfo*> attribsByLoc;
for (const auto& attrib : linkInfo->attribs) {
if (attrib.mLoc == -1)
continue;
const auto& elemType = attrib.mActiveInfo->mElemType;
const auto numUsedLocs = NumUsedLocationsByElemType(elemType);
for (uint32_t i = 0; i < numUsedLocs; i++) {
const uint32_t usedLoc = attrib.mLoc + i;
const auto res = attribsByLoc.insert({usedLoc, &attrib});
const bool& didInsert = res.second;
if (!didInsert) {
const auto& aliasingName = attrib.mActiveInfo->mBaseUserName;
const auto& itrExisting = res.first;
const auto& existingInfo = itrExisting->second;
const auto& existingName = existingInfo->mActiveInfo->mBaseUserName;
*out_linkLog = nsPrintfCString("Attrib \"%s\" aliases locations used by"
" attrib \"%s\".",
aliasingName.BeginReading(),
existingName.BeginReading());
return false;
}
}
}
// Forbid:
// * Unrecognized varying name
// * Duplicate varying name
// * Too many components for specified buffer mode
if (!mNextLink_TransformFeedbackVaryings.empty()) {
GLuint maxComponentsPerIndex = 0;
switch (mNextLink_TransformFeedbackBufferMode) {
case LOCAL_GL_INTERLEAVED_ATTRIBS:
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS,
&maxComponentsPerIndex);
break;
case LOCAL_GL_SEPARATE_ATTRIBS:
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS,
&maxComponentsPerIndex);
break;
default:
MOZ_CRASH("`bufferMode`");
}
std::vector<size_t> componentsPerVert;
std::set<const WebGLActiveInfo*> alreadyUsed;
for (const auto& wideUserName : mNextLink_TransformFeedbackVaryings) {
if (componentsPerVert.empty() ||
mNextLink_TransformFeedbackBufferMode == LOCAL_GL_SEPARATE_ATTRIBS)
{
componentsPerVert.push_back(0);
}
////
const WebGLActiveInfo* curInfo = nullptr;
for (const auto& info : linkInfo->transformFeedbackVaryings) {
const NS_ConvertASCIItoUTF16 info_wideUserName(info->mBaseUserName);
if (info_wideUserName == wideUserName) {
curInfo = info.get();
break;
}
}
if (!curInfo) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\" not"
" found.",
asciiUserName.BeginReading());
return false;
}
const auto insertResPair = alreadyUsed.insert(curInfo);
const auto& didInsert = insertResPair.second;
if (!didInsert) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\""
" specified twice.",
asciiUserName.BeginReading());
return false;
}
////
size_t varyingComponents = NumComponents(curInfo->mElemType);
varyingComponents *= curInfo->mElemCount;
auto& totalComponentsForIndex = *(componentsPerVert.rbegin());
totalComponentsForIndex += varyingComponents;
if (totalComponentsForIndex > maxComponentsPerIndex) {
const NS_LossyConvertUTF16toASCII asciiUserName(wideUserName);
*out_linkLog = nsPrintfCString("Transform feedback varying \"%s\""
" pushed `componentsForIndex` over the"
" limit of %u.",
asciiUserName.BeginReading(),
maxComponentsPerIndex);
return false;
}
}
linkInfo->componentsPerTFVert.swap(componentsPerVert);
}
return true;
}
bool
WebGLProgram::UseProgram() const
{
if (!mMostRecentLinkInfo) {
mContext->ErrorInvalidOperation("Program has not been successfully linked.");
return false;
}
if (mContext->mBoundTransformFeedback &&
mContext->mBoundTransformFeedback->mIsActive &&
!mContext->mBoundTransformFeedback->mIsPaused)
{
mContext->ErrorInvalidOperation("Transform feedback active and not paused.");
return false;
}
mContext->gl->fUseProgram(mGLName);
return true;
}
void
WebGLProgram::ValidateProgram() const
{
gl::GLContext* gl = mContext->gl;
#ifdef XP_MACOSX
// See bug 593867 for NVIDIA and bug 657201 for ATI. The latter is confirmed
// with Mac OS 10.6.7.
if (gl->WorkAroundDriverBugs()) {
mContext->GenerateWarning("Implemented as a no-op on"
" Mac to work around crashes.");
return;
}
#endif
gl->fValidateProgram(mGLName);
}
////////////////////////////////////////////////////////////////////////////////
void
WebGLProgram::LinkAndUpdate()
{
mMostRecentLinkInfo = nullptr;
gl::GLContext* gl = mContext->gl;
gl->fLinkProgram(mGLName);
// Grab the program log.
GLuint logLenWithNull = 0;
gl->fGetProgramiv(mGLName, LOCAL_GL_INFO_LOG_LENGTH, (GLint*)&logLenWithNull);
if (logLenWithNull > 1) {
mLinkLog.SetLength(logLenWithNull - 1);
gl->fGetProgramInfoLog(mGLName, logLenWithNull, nullptr, mLinkLog.BeginWriting());
} else {
mLinkLog.SetLength(0);
}
GLint ok = 0;
gl->fGetProgramiv(mGLName, LOCAL_GL_LINK_STATUS, &ok);
if (!ok)
return;
mMostRecentLinkInfo = QueryProgramInfo(this, gl);
MOZ_RELEASE_ASSERT(mMostRecentLinkInfo, "GFX: most recent link info not set.");
}
bool
WebGLProgram::FindAttribUserNameByMappedName(const nsACString& mappedName,
nsCString* const out_userName) const
{
if (mVertShader->FindAttribUserNameByMappedName(mappedName, out_userName))
return true;
return false;
}
bool
WebGLProgram::FindVaryingByMappedName(const nsACString& mappedName,
nsCString* const out_userName,
bool* const out_isArray) const
{
if (mVertShader->FindVaryingByMappedName(mappedName, out_userName, out_isArray))
return true;
return false;
}
bool
WebGLProgram::FindUniformByMappedName(const nsACString& mappedName,
nsCString* const out_userName,
bool* const out_isArray) const
{
if (mVertShader->FindUniformByMappedName(mappedName, out_userName, out_isArray))
return true;
if (mFragShader->FindUniformByMappedName(mappedName, out_userName, out_isArray))
return true;
return false;
}
void
WebGLProgram::TransformFeedbackVaryings(const dom::Sequence<nsString>& varyings,
GLenum bufferMode)
{
const auto& gl = mContext->gl;
switch (bufferMode) {
case LOCAL_GL_INTERLEAVED_ATTRIBS:
break;
case LOCAL_GL_SEPARATE_ATTRIBS:
{
GLuint maxAttribs = 0;
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS,
&maxAttribs);
if (varyings.Length() > maxAttribs) {
mContext->ErrorInvalidValue("Length of `varyings` exceeds %s.",
"TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
return;
}
}
break;
default:
mContext->ErrorInvalidEnumInfo("bufferMode", bufferMode);
return;
}
////
mNextLink_TransformFeedbackVaryings.assign(varyings.Elements(),
varyings.Elements() + varyings.Length());
mNextLink_TransformFeedbackBufferMode = bufferMode;
}
already_AddRefed<WebGLActiveInfo>
WebGLProgram::GetTransformFeedbackVarying(GLuint index) const
{
// No docs in the WebGL 2 spec for this function. Taking the language for
// getActiveAttrib, which states that the function returns null on any error.
if (!IsLinked()) {
mContext->ErrorInvalidOperation("`program` must be linked.");
return nullptr;
}
if (index >= LinkInfo()->transformFeedbackVaryings.size()) {
mContext->ErrorInvalidValue("`index` is greater or "
"equal to TRANSFORM_FEEDBACK_VARYINGS.");
return nullptr;
}
RefPtr<WebGLActiveInfo> ret = LinkInfo()->transformFeedbackVaryings[index];
return ret.forget();
}
bool
WebGLProgram::UnmapUniformBlockName(const nsCString& mappedName,
nsCString* const out_userName) const
{
nsCString baseMappedName;
bool isArray;
size_t arrayIndex;
if (!ParseName(mappedName, &baseMappedName, &isArray, &arrayIndex))
return false;
nsCString baseUserName;
if (!mVertShader->UnmapUniformBlockName(baseMappedName, &baseUserName) &&
!mFragShader->UnmapUniformBlockName(baseMappedName, &baseUserName))
{
return false;
}
AssembleName(baseUserName, isArray, arrayIndex, out_userName);
return true;
}
void
WebGLProgram::EnumerateFragOutputs(std::map<nsCString, const nsCString> &out_FragOutputs) const
{
MOZ_ASSERT(mFragShader);
mFragShader->EnumerateFragOutputs(out_FragOutputs);
}
////////////////////////////////////////////////////////////////////////////////
bool
IsBaseName(const nsCString& name)
{
if (!name.Length())
return true;
return name[name.Length() - 1] != ']'; // Doesn't end in ']'.
}
bool
webgl::LinkedProgramInfo::FindAttrib(const nsCString& userName,
const webgl::AttribInfo** const out) const
{
// VS inputs cannot be arrays or structures.
// `userName` is thus always `baseUserName`.
for (const auto& attrib : attribs) {
if (attrib.mActiveInfo->mBaseUserName == userName) {
*out = &attrib;
return true;
}
}
return false;
}
bool
webgl::LinkedProgramInfo::FindUniform(const nsCString& userName,
nsCString* const out_mappedName,
size_t* const out_arrayIndex,
webgl::UniformInfo** const out_info) const
{
nsCString baseUserName;
bool isArray;
size_t arrayIndex;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return false;
webgl::UniformInfo* info = nullptr;
for (const auto& uniform : uniforms) {
if (uniform->mActiveInfo->mBaseUserName == baseUserName) {
info = uniform;
break;
}
}
if (!info)
return false;
const auto& baseMappedName = info->mActiveInfo->mBaseMappedName;
AssembleName(baseMappedName, isArray, arrayIndex, out_mappedName);
*out_arrayIndex = arrayIndex;
*out_info = info;
return true;
}
bool
webgl::LinkedProgramInfo::MapFragDataName(const nsCString& userName,
nsCString* const out_mappedName) const
{
// FS outputs can be arrays, but not structures.
if (fragDataMap.empty()) {
// No mappings map from validation, so just forward it.
*out_mappedName = userName;
return true;
}
nsCString baseUserName;
bool isArray;
size_t arrayIndex;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return false;
const auto itr = fragDataMap.find(baseUserName);
if (itr == fragDataMap.end())
return false;
const auto& baseMappedName = itr->second;
AssembleName(baseMappedName, isArray, arrayIndex, out_mappedName);
return true;
}
////////////////////////////////////////////////////////////////////////////////
JSObject*
WebGLProgram::WrapObject(JSContext* js, JS::Handle<JSObject*> givenProto)
{
return dom::WebGLProgram_Binding::Wrap(js, this, givenProto);
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLProgram, mVertShader, mFragShader)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLProgram, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLProgram, Release)
} // namespace mozilla
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