bool
ValidateGLSLVariableName(const nsAString& name, WebGLContext* webgl, const char* funcName)
{
if (name.IsEmpty())
return false;
const uint32_t maxSize = 256;
if (name.Length() > maxSize) {
webgl->ErrorInvalidValue("%s: Identifier is %d characters long, exceeds the"
" maximum allowed length of %d characters.",
funcName, name.Length(), maxSize);
return false;
}
if (!ValidateGLSLString(name, webgl, funcName))
return false;
nsString prefix1 = NS_LITERAL_STRING("webgl_");
nsString prefix2 = NS_LITERAL_STRING("_webgl_");
if (Substring(name, 0, prefix1.Length()).Equals(prefix1) ||
Substring(name, 0, prefix2.Length()).Equals(prefix2))
{
webgl->ErrorInvalidOperation("%s: String contains a reserved GLSL prefix.",
funcName);
return false;
}
return true;
}
void
WebGLShader::ShaderSource(const nsAString& source)
{
StripComments stripComments(source);
const nsAString& cleanSource = Substring(stripComments.result().Elements(),
stripComments.length());
if (!ValidateGLSLString(cleanSource, mContext, "shaderSource"))
return;
// We checked that the source stripped of comments is in the
// 7-bit ASCII range, so we can skip the NS_IsAscii() check.
const NS_LossyConvertUTF16toASCII sourceCString(cleanSource);
if (mContext->gl->WorkAroundDriverBugs()) {
const size_t maxSourceLength = 0x3ffff;
if (sourceCString.Length() > maxSourceLength) {
mContext->ErrorInvalidValue("shaderSource: Source has more than %d"
" characters. (Driver workaround)",
maxSourceLength);
return;
}
}
if (PR_GetEnv("MOZ_WEBGL_DUMP_SHADERS")) {
printf_stderr("////////////////////////////////////////\n");
printf_stderr("// MOZ_WEBGL_DUMP_SHADERS:\n");
// Wow - Roll Your Own Foreach-Lines because printf_stderr has a hard-coded
// internal size, so long strings are truncated.
int32_t start = 0;
int32_t end = sourceCString.Find("\n", false, start, -1);
while (end > -1) {
const nsCString line(sourceCString.BeginReading() + start, end - start);
printf_stderr("%s\n", line.BeginReading());
start = end + 1;
end = sourceCString.Find("\n", false, start, -1);
}
printf_stderr("////////////////////////////////////////\n");
}
mSource = source;
mCleanSource = sourceCString;
}
void
WebGLShader::ShaderSource(const nsAString& source)
{
StripComments stripComments(source);
const nsAString& cleanSource = Substring(stripComments.result().Elements(),
stripComments.length());
if (!ValidateGLSLString(cleanSource, mContext, "shaderSource"))
return;
// We checked that the source stripped of comments is in the
// 7-bit ASCII range, so we can skip the NS_IsAscii() check.
NS_LossyConvertUTF16toASCII sourceCString(cleanSource);
if (mContext->gl->WorkAroundDriverBugs()) {
const size_t maxSourceLength = 0x3ffff;
if (sourceCString.Length() > maxSourceLength) {
mContext->ErrorInvalidValue("shaderSource: Source has more than %d"
" characters. (Driver workaround)",
maxSourceLength);
return;
}
}
// HACK - dump shader source
{
/*
printf_stderr("//-*- glsl -*-\n");
// Wow - Roll Your Own For Each Lines because printf_stderr has a hard-coded internal size, so long strings are truncated.
const nsString& src = shader->Source();
int32_t start = 0;
int32_t end = src.Find("\n", false, start, -1);
while (end > -1) {
printf_stderr("%s\n", NS_ConvertUTF16toUTF8(nsDependentSubstring(src, start, end - start)).get());
start = end + 1;
end = src.Find("\n", false, start, -1);
}
printf_stderr("//\n");
*/
}
// HACK
mSource = source;
mCleanSource = sourceCString;
}
