diff options
Diffstat (limited to 'src/quick/scenegraph/coreapi/qsgshaderrewriter.cpp')
| -rw-r--r-- | src/quick/scenegraph/coreapi/qsgshaderrewriter.cpp | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/src/quick/scenegraph/coreapi/qsgshaderrewriter.cpp b/src/quick/scenegraph/coreapi/qsgshaderrewriter.cpp deleted file mode 100644 index 1fdc1720f7..0000000000 --- a/src/quick/scenegraph/coreapi/qsgshaderrewriter.cpp +++ /dev/null @@ -1,300 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtQuick module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <QtCore/QByteArray> -#include <QtCore/QString> -#include <QtGui/QSurfaceFormat> - -// Duct Tape tokenizer for the purpose of parsing and rewriting -// shader source code - -QT_BEGIN_NAMESPACE - -namespace QSGShaderRewriter { - -struct Tokenizer { - - enum Token { - Token_Void, - Token_OpenBrace, - Token_CloseBrace, - Token_SemiColon, - Token_Identifier, - Token_Macro, - Token_Unspecified, - - Token_EOF - }; - - static const char *NAMES[]; - - void initialize(const char *input); - Token next(); - - const char *stream; - const char *pos; - const char *identifier; -}; - -const char *Tokenizer::NAMES[] = { - "Void", - "OpenBrace", - "CloseBrace", - "SemiColon", - "Identifier", - "Macro", - "Unspecified", - "EOF" -}; - -void Tokenizer::initialize(const char *input) -{ - stream = input; - pos = input; - identifier = input; -} - -Tokenizer::Token Tokenizer::next() -{ - while (*pos != 0) { - char c = *pos++; - switch (c) { - case '/': - - if (*pos == '/') { - // '//' comment - ++pos; - while (*pos != 0 && *pos != '\n') ++pos; - if (*pos != 0) ++pos; // skip the newline - - } else if (*pos == '*') { - // /* */ comment - ++pos; - while (*pos != 0 && *pos != '*' && pos[1] != '/') ++pos; - if (*pos != 0) pos += 2; - } - break; - - case '#': { - while (*pos != 0) { - if (*pos == '\n') { - ++pos; - break; - } else if (*pos == '\\') { - ++pos; - while (*pos != 0 && (*pos == ' ' || *pos == '\t')) - ++pos; - if (*pos != 0 && (*pos == '\n' || (*pos == '\r' && pos[1] == '\n'))) - pos+=2; - } else { - ++pos; - } - } - break; - } - - case 'v': { - if (*pos == 'o' && pos[1] == 'i' && pos[2] == 'd') { - pos += 3; - return Token_Void; - } - Q_FALLTHROUGH(); - } - - case ';': return Token_SemiColon; - case 0: return Token_EOF; - case '{': return Token_OpenBrace; - case '}': return Token_CloseBrace; - - case ' ': - case '\n': - case '\r': break; - default: - // Identifier... - if ((c >= 'a' && c <= 'z' ) || (c >= 'A' && c <= 'Z' ) || c == '_') { - identifier = pos - 1; - while (*pos != 0 && ((*pos >= 'a' && *pos <= 'z') - || (*pos >= 'A' && *pos <= 'Z') - || *pos == '_' - || (*pos >= '0' && *pos <= '9'))) { - ++pos; - } - return Token_Identifier; - } else { - return Token_Unspecified; - } - } - } - - return Token_EOF; -} - -} - -using namespace QSGShaderRewriter; - -QByteArray qsgShaderRewriter_insertZAttributes(const char *input, QSurfaceFormat::OpenGLContextProfile profile) -{ - Tokenizer tok; - tok.initialize(input); - - Tokenizer::Token lt = tok.next(); - Tokenizer::Token t = tok.next(); - - // First find "void main() { ... " - const char* voidPos = input; - while (t != Tokenizer::Token_EOF) { - if (lt == Tokenizer::Token_Void && t == Tokenizer::Token_Identifier) { - if (qstrncmp("main", tok.identifier, 4) == 0) - break; - } - voidPos = tok.pos - 4; - lt = t; - t = tok.next(); - } - - QByteArray result; - result.reserve(1024); - result += QByteArray::fromRawData(input, voidPos - input); - switch (profile) { - case QSurfaceFormat::NoProfile: - case QSurfaceFormat::CompatibilityProfile: - result += "attribute highp float _qt_order;\n" - "uniform highp float _qt_zRange;\n"; - break; - - case QSurfaceFormat::CoreProfile: - result += "in float _qt_order;\n" - "uniform float _qt_zRange;\n"; - break; - } - - // Find first brace '{' - while (t != Tokenizer::Token_EOF && t != Tokenizer::Token_OpenBrace) t = tok.next(); - int braceDepth = 1; - t = tok.next(); - - // Find matching brace and insert our code there... - while (t != Tokenizer::Token_EOF) { - switch (t) { - case Tokenizer::Token_CloseBrace: - braceDepth--; - if (braceDepth == 0) { - result += QByteArray::fromRawData(voidPos, tok.pos - 1 - voidPos) - + " gl_Position.z = (gl_Position.z * _qt_zRange + _qt_order) * gl_Position.w;\n" - + QByteArray(tok.pos - 1); - return result; - } - break; - case Tokenizer::Token_OpenBrace: - ++braceDepth; - break; - default: - break; - } - t = tok.next(); - } - return QByteArray(); -} - -#ifdef QSGSHADERREWRITER_STANDALONE - -const char *selftest = - "#define highp lowp stuff \n" - "#define multiline \\ \n" - " continue defining multiline \n" - " \n" - "attribute highp vec4 qt_Position; \n" - "attribute highp vec2 qt_TexCoord; \n" - " \n" - "uniform highp mat4 qt_Matrix; \n" - " \n" - "varying lowp vec2 vTexCoord; \n" - " \n" - "// commented out main(){} \n" - "/* commented out main() { } again */ \n" - "/* \n" - " multline comment with main() { } \n" - " */ \n" - " \n" - "void main() { \n" - " gl_Position = qt_Matrix * qt_Position; \n" - " vTexCoord = qt_TexCoord; \n" - " if (gl_Position < 0) { \n" - " vTexCoord.y = -vTexCoord.y; \n" - " } \n" - "} \n" - ""; - -int main(int argc, char **argv) -{ - QCoreApplication app(argc, argv); - - QString fileName; - QStringList args = app.arguments(); - - QByteArray content; - - for (int i=0; i<args.length(); ++i) { - const QString &a = args.at(i); - if (a == QLatin1String("--file") && i < args.length() - 1) { - qDebug() << "Reading file: " << args.at(i); - QFile file(args.at(++i)); - if (!file.open(QFile::ReadOnly)) { - qDebug() << "Error: failed to open file," << file.errorString(); - return 1; - } - content = file.readAll(); - } else if (a == QLatin1String("--selftest")) { - qDebug() << "doing a selftest"; - content = QByteArray(selftest); - } else if (a == QLatin1String("--help") || a == QLatin1String("-h")) { - qDebug() << "usage:" << endl - << " --file [name] A vertex shader file to rewrite" << endl; - } - } - - QByteArray rewritten = qsgShaderRewriter_insertZAttributes(content); - - qDebug() << "Rewritten to:"; - qDebug() << rewritten.constData(); -} -#endif - -QT_END_NAMESPACE |