diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qglshader.cpp')
| -rw-r--r-- | src/opengl/gl2paintengineex/qglshader.cpp | 605 |
1 files changed, 605 insertions, 0 deletions
diff --git a/src/opengl/gl2paintengineex/qglshader.cpp b/src/opengl/gl2paintengineex/qglshader.cpp new file mode 100644 index 0000000000..634be845a3 --- /dev/null +++ b/src/opengl/gl2paintengineex/qglshader.cpp @@ -0,0 +1,605 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtOpenGL module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qglshader_p.h" + + +// Windows needs to resolve OpenGL 2.0 function pointers for each context. The +// QGL OpenGL 2.0 functions are actually macros, which take a "ctx" parameter. +#define Q_CTX QGLContext* ctx = d->ctx; \ + if (!ctx) \ + return false; \ + ctx->makeCurrent(); \ + + + + +class QGLShaderPrivate +{ +public: + QGLShaderPrivate() : shaderId(0), valid(false), ctx(0) {} + + GLuint shaderId; + QString source; + bool valid; + QGLShader::ShaderType type; + QGLContext* ctx; +}; + + +QGLShader::QGLShader(QGLShader::ShaderType type, const QGLContext* ctx) + : d_ptr(new QGLShaderPrivate) +{ + Q_D(QGLShader); + + if (!ctx) + ctx = QGLContext::currentContext(); + + if (!ctx) { + qWarning("QGLShader being created without a context"); + return; + } + + d->ctx = const_cast<QGLContext*>(ctx); + d->ctx->makeCurrent(); + + if (type == QGLShader::FragmentShader) + d->shaderId = glCreateShader(GL_FRAGMENT_SHADER); + else + d->shaderId = glCreateShader(GL_VERTEX_SHADER); + + if (d->shaderId == 0) { + qWarning("Error creating shader object"); + return; + } + + d->type = type; +} + +GLuint QGLShader::id() +{ + Q_D(QGLShader); + return d->shaderId; +} + +const QGLContext* QGLShader::context() +{ + Q_D(QGLShader); + return d->ctx; +} + +void QGLShader::clearSource() +{ + Q_D(QGLShader); + d->source.clear(); + d->valid = false; +} + +void QGLShader::addSource(const QLatin1String& newSource) +{ + Q_D(QGLShader); + d->source += newSource; + d->valid = false; +} + + +bool QGLShader::compile() +{ + Q_D(QGLShader); + + d->valid = false; + + if (d->source.size() == 0) + return false; + + const QByteArray src_ba = d->source.toAscii(); + const char* src = src_ba.constData(); + + glShaderSource(d->shaderId, 1, &src, 0); + + glCompileShader(d->shaderId); + + GLint shaderCompiled; + glGetShaderiv(d->shaderId, GL_COMPILE_STATUS, &shaderCompiled); + if (!shaderCompiled) + return false; + + d->valid = true; + return true; +} + +bool QGLShader::isValid() +{ + Q_D(QGLShader); + return d->valid; +} + +QString QGLShader::log() +{ + Q_D(QGLShader); + + char* logData; + GLint logSize; + GLint logLength; + + glGetShaderiv(d->shaderId, GL_INFO_LOG_LENGTH, &logSize); + + if (!logSize) + return QString(); + + logData = new char[logSize]; + glGetShaderInfoLog(d->shaderId, logSize, &logLength, logData); + QString result = QString::fromAscii(logData); + delete [] logData; + + return result; +} + + + + + + + + + + + + +class QGLShaderProgramPrivate +{ +public: + QGLShaderProgramPrivate() : valid(false), programId(0), ctx(0) {} + void populateVariableLists(); + + QVector<QGLShader*> shaders; + QGLUniformList uniforms; + QGLVertexAttributeList attributeArrays; + bool valid; + GLuint programId; + QGLContext* ctx; +}; + + + +void QGLShaderProgramPrivate::populateVariableLists() +{ + attributeArrays.clear(); + uniforms.clear(); + + int count; + int sizeOfNameBuff; + char* name; + GLint nameLength; + GLenum type; + GLint size; + GLint location; + + glGetProgramiv(programId, GL_ACTIVE_ATTRIBUTES, &count); + glGetProgramiv(programId, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &sizeOfNameBuff); + name = new char[sizeOfNameBuff]; + + for (int i = 0; i < count; ++i) { + nameLength = -1; + glGetActiveAttrib(programId, i, sizeOfNameBuff, &nameLength, &size, &type, name); + if (nameLength == -1) + continue; + + location = glGetAttribLocation(programId, name); + attributeArrays.insert(QString::fromAscii(name), QGLVertexAttribute(type, location, ctx)); + } + + delete [] name; + + + glGetProgramiv(programId, GL_ACTIVE_UNIFORMS, &count); + glGetProgramiv(programId, GL_ACTIVE_UNIFORM_MAX_LENGTH, &sizeOfNameBuff); + + name = new char[sizeOfNameBuff]; + + for (int i = 0; i < count; ++i) { + nameLength = -1; + glGetActiveUniform(programId, i, sizeOfNameBuff, &nameLength, &size, &type, name); + if (nameLength == -1) + continue; + + location = glGetUniformLocation(programId, name); + uniforms.insert(QString::fromAscii(name), QGLUniform(type, location, ctx)); + } +} + + +QGLShaderProgram::QGLShaderProgram(const QGLContext* ctx) + : d_ptr(new QGLShaderProgramPrivate) +{ + Q_D(QGLShaderProgram); + if (!ctx) + ctx = QGLContext::currentContext(); + + if (!ctx) { + qWarning("QGLShaderProgram being created without a context"); + return; + } + + d->ctx = const_cast<QGLContext*>(ctx); + d->ctx->makeCurrent(); + + d->programId = glCreateProgram(); + + d->valid = false; +} + + +const QGLUniformList & QGLShaderProgram::uniforms() +{ + Q_D(QGLShaderProgram); + return const_cast<const QGLUniformList&>(d->uniforms); +} + + +const QGLVertexAttributeList& QGLShaderProgram::vertexAttributes() +{ + Q_D(QGLShaderProgram); + return const_cast<const QGLVertexAttributeList&>(d->attributeArrays); +} + + +bool QGLShaderProgram::addShader(QGLShader* newShader) +{ + Q_D(QGLShaderProgram); + if (!newShader || !d->ctx) + return false; + + if (newShader->context() != d->ctx) { + qWarning("Shader object's context does not match program's context"); + return false; + } + + if (!newShader->isValid()) + return false; + + QGLContext* ctx = d->ctx; + if (!ctx) + return false; + ctx->makeCurrent(); + + glAttachShader(d->programId, newShader->id()); + + d->shaders.append(newShader); + return true; +} + + +bool QGLShaderProgram::removeShader(QGLShader* oldShader) +{ + Q_D(QGLShaderProgram); + + int idx = d->shaders.indexOf(oldShader); + + if (idx == -1) + return false; + + d->shaders.remove(idx); + + QGLContext* ctx = d->ctx; + if (!ctx) + return false; + ctx->makeCurrent(); + + glDetachShader(d->programId, oldShader->id()); + return true; +} + + +bool QGLShaderProgram::removeAllShaders() +{ + Q_D(QGLShaderProgram); + + QGLContext* ctx = d->ctx; + if (!ctx) + return false; + ctx->makeCurrent(); + + foreach (QGLShader* shader, d->shaders) + glDetachShader(d->programId, shader->id()); + + d->shaders.clear(); + return true; +} + +#include <stdio.h> + +bool QGLShaderProgram::link() +{ + Q_D(QGLShaderProgram); + + QGLContext* ctx = d->ctx; + if (!ctx) + return false; + ctx->makeCurrent(); + + glLinkProgram(d->programId); + + + GLint linked; + glGetProgramiv(d->programId, GL_LINK_STATUS, &linked); + + if (!linked) + return false; + + d->populateVariableLists(); + + d->valid = true; + return true; +} + +void QGLShaderProgram::use() +{ + Q_D(QGLShaderProgram); + if (!d->valid) + return; + + glUseProgram(d->programId); +} + + +QString QGLShaderProgram::log() +{ + Q_D(QGLShaderProgram); + + QGLContext* ctx = d->ctx; + if (!ctx) + return QString(); + ctx->makeCurrent(); + + GLint logSize = -666; + glGetProgramiv(d->programId, GL_INFO_LOG_LENGTH, &logSize); + + char* logData = new char[logSize]; + GLint logLength; + + glGetProgramInfoLog(d->programId, logSize, &logLength, logData); + + QString result = QString::fromAscii(logData); + delete [] logData; + + return result; +} + +GLuint QGLShaderProgram::id() +{ + Q_D(QGLShaderProgram); + return d->programId; +} + +///////////////////////////////////////////////////////////////////////// + + + + +QGLUniform::QGLUniform() + : m_id(0), m_type(QGLInvalidType), ctx(0) +{ + qWarning("Unknown uniform! Either the uniform doesn't exist or it was removed at shader link"); +} + +const QGLUniform& QGLUniform::operator=(const GLfloat& rhs) const +{ + if (m_type != QGLFloatType) + return *this; + + glUniform1f(m_id, rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QGLVec2& rhs) const +{ + if (m_type != QGLVec2Type) + return *this; + + glUniform2fv(m_id, 1, (const GLfloat*)&rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QSizeF& rhs) const +{ + if (m_type != QGLVec2Type) + return *this; + + glUniform2f(m_id, rhs.width(), rhs.height()); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QPointF& rhs) const +{ + if (m_type != QGLVec2Type) + return *this; + + glUniform2f(m_id, rhs.x(), rhs.y()); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QGLVec3& rhs) const +{ + if (m_type != QGLVec3Type) + return *this; + + glUniform3fv(m_id, 1, (const GLfloat*)&rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QGLVec4& rhs) const +{ + if (m_type != QGLVec4Type) + return *this; + + glUniform4fv(m_id, 1, (const GLfloat*)&rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const QColor& rhs) const +{ + if (m_type != QGLVec4Type) + return *this; + + glUniform4f(m_id, rhs.redF(), rhs.greenF(), rhs.blueF(), rhs.alphaF()); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const GLfloat rhs[2][2]) const +{ + if (m_type != QGLMat2Type) + return *this; + + glUniformMatrix2fv(m_id, 1, GL_FALSE, (GLfloat*)rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const GLfloat rhs[3][3]) const +{ + if (m_type != QGLMat3Type) + return *this; + + glUniformMatrix3fv(m_id, 1, GL_FALSE, (GLfloat*)rhs); + + return *this; +} + +// Transposes ready for GL +const QGLUniform& QGLUniform::operator=(const QTransform& rhs) const +{ + if (m_type != QGLMat3Type) + return *this; + + GLfloat mat3[3][3] = { + {rhs.m11(), rhs.m12(), rhs.m13()}, + {rhs.m21(), rhs.m22(), rhs.m23()}, + {rhs.m31(), rhs.m32(), rhs.m33()} + }; + + glUniformMatrix3fv(m_id, 1, GL_FALSE, (GLfloat*)mat3); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const GLfloat rhs[4][4]) const +{ + if (m_type != QGLMat4Type) + return *this; + + glUniformMatrix4fv(m_id, 1, GL_FALSE, (GLfloat*)rhs); + + return *this; +} + +const QGLUniform& QGLUniform::operator=(const GLuint& rhs) const +{ + if ((m_type != QGLSampler2DType) || (m_type != QGLSamplerCubeType)) + return *this; + + glUniform1i(m_id, rhs); + + return *this; +} + + + + +///////////////////////////////////////////////////////////////////////// + +QGLVertexAttribute::QGLVertexAttribute() + : m_id(0), m_type(QGLInvalidType), ctx(0) +{ + qWarning("Unknown vertex attribute!"); +} + +void QGLVertexAttribute::enable() const +{ + glEnableVertexAttribArray(m_id); +} + +void QGLVertexAttribute::disable() const +{ + glDisableVertexAttribArray(m_id); +} + +// NOTE: Under PC emulation, QGLVec4Type is _always_ returned as the type, so this +// method isn't very useful. I.e. The datatypes are needed to distinguish the different +// sizes for the function signatures. +const QGLVertexAttribute& QGLVertexAttribute::operator=(const GLfloat* rhs) const +{ + int size = -1; + if (m_type == QGLFloatType) + size = 1; + else if (m_type == QGLVec2Type) + size = 2; + else if (m_type == QGLVec3Type) + size = 3; + else if (m_type == QGLVec4Type) + size = 4; + else if (m_type == QGLMat2Type) //### Not sure if this is right for matrix attributes... + size = 4; + else if (m_type == QGLMat3Type) //### Not sure if this is right for matrix attributes... + size = 9; + else if (m_type == QGLMat4Type) //### Not sure if this is right for matrix attributes... + size = 16; + else + return *this; + + glVertexAttribPointer(m_id, size, GL_FLOAT, GL_FALSE, 0, rhs); + + return *this; +} + +const QGLVertexAttribute& QGLVertexAttribute::operator=(const QGLVec3* rhs) const +{ + glVertexAttribPointer(m_id, 3, GL_FLOAT, GL_FALSE, 0, (GLfloat*)rhs); + + return *this; +} |