void
WebGLProgram::BindAttribLocation(GLuint loc, const nsAString& name)
{
if (!ValidateGLSLVariableName(name, mContext, "bindAttribLocation"))
return;
if (loc >= mContext->MaxVertexAttribs()) {
mContext->ErrorInvalidValue("bindAttribLocation: `location` must be less than"
" MAX_VERTEX_ATTRIBS.");
return;
}
if (StringBeginsWith(name, NS_LITERAL_STRING("gl_"))) {
mContext->ErrorInvalidOperation("bindAttribLocation: Can't set the location of a"
" name that starts with 'gl_'.");
return;
}
NS_LossyConvertUTF16toASCII asciiName(name);
auto res = mBoundAttribLocs.insert(std::pair<nsCString, GLuint>(asciiName, loc));
const bool wasInserted = res.second;
if (!wasInserted) {
auto itr = res.first;
itr->second = loc;
}
}
already_AddRefed<WebGLUniformLocation>
WebGLProgram::GetUniformLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext, "getUniformLocation"))
return nullptr;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("getUniformLocation: `program` must be linked.");
return nullptr;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
nsDependentCString baseUserName;
bool isArray = false;
// 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]".
// The ParseName() can't recognize this rule. So always initialize
// arrayIndex with 0.
size_t arrayIndex = 0;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return nullptr;
const WebGLActiveInfo* activeInfo;
if (!LinkInfo()->FindUniform(baseUserName, &activeInfo))
return nullptr;
const nsCString& baseMappedName = activeInfo->mBaseMappedName;
nsAutoCString mappedName(baseMappedName);
if (isArray) {
mappedName.AppendLiteral("[");
mappedName.AppendInt(uint32_t(arrayIndex));
mappedName.AppendLiteral("]");
}
gl::GLContext* gl = mContext->GL();
gl->MakeCurrent();
GLint loc = gl->fGetUniformLocation(mGLName, mappedName.BeginReading());
if (loc == -1)
return nullptr;
RefPtr<WebGLUniformLocation> locObj = new WebGLUniformLocation(mContext, LinkInfo(),
loc, arrayIndex,
activeInfo);
return locObj.forget();
}
already_AddRefed<WebGLUniformLocation>
WebGLProgram::GetUniformLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext, "getUniformLocation"))
return nullptr;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("getUniformLocation: `program` must be linked.");
return nullptr;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
nsDependentCString baseUserName;
bool isArray;
size_t arrayIndex;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return nullptr;
const WebGLActiveInfo* activeInfo;
if (!LinkInfo()->FindUniform(baseUserName, &activeInfo))
return nullptr;
const nsCString& baseMappedName = activeInfo->mBaseMappedName;
nsAutoCString mappedName(baseMappedName);
if (isArray) {
mappedName.AppendLiteral("[");
mappedName.AppendInt(uint32_t(arrayIndex));
mappedName.AppendLiteral("]");
}
gl::GLContext* gl = mContext->GL();
gl->MakeCurrent();
GLint loc = gl->fGetUniformLocation(mGLName, mappedName.BeginReading());
if (loc == -1)
return nullptr;
RefPtr<WebGLUniformLocation> locObj = new WebGLUniformLocation(mContext, LinkInfo(),
loc, activeInfo);
return locObj.forget();
}
GLint
WebGLProgram::GetAttribLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext, "getAttribLocation"))
return -1;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("getAttribLocation: `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);
}
GLint
WebGLProgram::GetFragDataLocation(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext, "getFragDataLocation"))
return -1;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("getFragDataLocation: `program` must be linked.");
return -1;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
nsCString mappedName;
if (!LinkInfo()->FindFragData(userName, &mappedName))
return -1;
gl::GLContext* gl = mContext->GL();
gl->MakeCurrent();
return gl->fGetFragDataLocation(mGLName, mappedName.BeginReading());
}
GLuint
WebGLProgram::GetUniformBlockIndex(const nsAString& userName_wide) const
{
if (!ValidateGLSLVariableName(userName_wide, mContext, "getUniformBlockIndex"))
return LOCAL_GL_INVALID_INDEX;
if (!IsLinked()) {
mContext->ErrorInvalidOperation("getUniformBlockIndex: `program` must be linked.");
return LOCAL_GL_INVALID_INDEX;
}
const NS_LossyConvertUTF16toASCII userName(userName_wide);
nsDependentCString baseUserName;
bool isArray;
size_t arrayIndex;
if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
return LOCAL_GL_INVALID_INDEX;
RefPtr<const webgl::UniformBlockInfo> info;
if (!LinkInfo()->FindUniformBlock(baseUserName, &info)) {
return LOCAL_GL_INVALID_INDEX;
}
const nsCString& baseMappedName = info->mBaseMappedName;
nsAutoCString mappedName(baseMappedName);
if (isArray) {
mappedName.AppendLiteral("[");
mappedName.AppendInt(uint32_t(arrayIndex));
mappedName.AppendLiteral("]");
}
gl::GLContext* gl = mContext->GL();
gl->MakeCurrent();
return gl->fGetUniformBlockIndex(mGLName, mappedName.BeginReading());
}
void
WebGLProgram::TransformFeedbackVaryings(const dom::Sequence<nsString>& varyings,
GLenum bufferMode)
{
if (bufferMode != LOCAL_GL_INTERLEAVED_ATTRIBS &&
bufferMode != LOCAL_GL_SEPARATE_ATTRIBS)
{
mContext->ErrorInvalidEnum("transformFeedbackVaryings: `bufferMode` %s is "
"invalid. Must be one of gl.INTERLEAVED_ATTRIBS or "
"gl.SEPARATE_ATTRIBS.",
mContext->EnumName(bufferMode));
return;
}
size_t varyingsCount = varyings.Length();
if (bufferMode == LOCAL_GL_SEPARATE_ATTRIBS &&
varyingsCount >= mContext->mGLMaxTransformFeedbackSeparateAttribs)
{
mContext->ErrorInvalidValue("transformFeedbackVaryings: Number of `varyings` exc"
"eeds gl.MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS.");
return;
}
std::vector<nsCString> asciiVaryings;
for (size_t i = 0; i < varyingsCount; i++) {
if (!ValidateGLSLVariableName(varyings[i], mContext, "transformFeedbackVaryings"))
return;
NS_LossyConvertUTF16toASCII asciiName(varyings[i]);
asciiVaryings.push_back(asciiName);
}
// All validated. Translate the strings and store them until
// program linking.
mTransformFeedbackBufferMode = bufferMode;
mTransformFeedbackVaryings.swap(asciiVaryings);
}
