diff options
Diffstat (limited to 'src/plugins/platforms/eglfs/qeglfscursor.cpp')
| -rw-r--r-- | src/plugins/platforms/eglfs/qeglfscursor.cpp | 129 |
1 files changed, 115 insertions, 14 deletions
diff --git a/src/plugins/platforms/eglfs/qeglfscursor.cpp b/src/plugins/platforms/eglfs/qeglfscursor.cpp index d81aa2eaf2..eea130a754 100644 --- a/src/plugins/platforms/eglfs/qeglfscursor.cpp +++ b/src/plugins/platforms/eglfs/qeglfscursor.cpp @@ -43,6 +43,11 @@ #include <QtCore/QJsonObject> #include <QtGui/private/qguiapplication_p.h> +#include <QtGui/private/qopenglvertexarrayobject_p.h> + +#ifndef GL_VERTEX_ARRAY_BINDING +#define GL_VERTEX_ARRAY_BINDING 0x85B5 +#endif QT_BEGIN_NAMESPACE @@ -50,8 +55,6 @@ QEglFSCursor::QEglFSCursor(QPlatformScreen *screen) : m_visible(true), m_screen(static_cast<QEglFSScreen *>(screen)), m_program(0), - m_vertexCoordEntry(0), - m_textureCoordEntry(0), m_textureEntry(0), m_deviceListener(0), m_updateRequested(false) @@ -134,10 +137,10 @@ void QEglFSCursor::createShaderPrograms() m_program = new QOpenGLShaderProgram; m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, textureVertexProgram); m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, textureFragmentProgram); + m_program->bindAttributeLocation("vertexCoordEntry", 0); + m_program->bindAttributeLocation("textureCoordEntry", 1); m_program->link(); - m_vertexCoordEntry = m_program->attributeLocation("vertexCoordEntry"); - m_textureCoordEntry = m_program->attributeLocation("textureCoordEntry"); m_textureEntry = m_program->uniformLocation("texture"); } @@ -322,8 +325,105 @@ void QEglFSCursor::paintOnScreen() draw(r); } +// In order to prevent breaking code doing custom OpenGL rendering while +// expecting the state in the context unchanged, save and restore all the state +// we touch. The exception is Qt Quick where the scenegraph is known to be able +// to deal with the changes we make. +struct StateSaver +{ + StateSaver() { + f = QOpenGLContext::currentContext()->functions(); + vaoHelper = new QOpenGLVertexArrayObjectHelper(QOpenGLContext::currentContext()); + + static bool windowsChecked = false; + static bool shouldSave = true; + if (!windowsChecked) { + windowsChecked = true; + QWindowList windows = QGuiApplication::allWindows(); + if (!windows.isEmpty() && windows[0]->inherits("QQuickWindow")) + shouldSave = false; + } + saved = shouldSave; + if (!shouldSave) + return; + + f->glGetIntegerv(GL_CURRENT_PROGRAM, &program); + f->glGetIntegerv(GL_TEXTURE_BINDING_2D, &texture); + f->glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTexture); + f->glGetIntegerv(GL_FRONT_FACE, &frontFace); + cull = f->glIsEnabled(GL_CULL_FACE); + depthTest = f->glIsEnabled(GL_DEPTH_TEST); + blend = f->glIsEnabled(GL_BLEND); + f->glGetIntegerv(GL_BLEND_SRC_RGB, blendFunc); + f->glGetIntegerv(GL_BLEND_SRC_ALPHA, blendFunc + 1); + f->glGetIntegerv(GL_BLEND_DST_RGB, blendFunc + 2); + f->glGetIntegerv(GL_BLEND_DST_ALPHA, blendFunc + 3); + f->glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &arrayBuf); + if (vaoHelper->isValid()) + f->glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &vao); + for (int i = 0; i < 2; ++i) { + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &va[i].enabled); + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_SIZE, &va[i].size); + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_TYPE, &va[i].type); + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &va[i].normalized); + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_STRIDE, &va[i].stride); + f->glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, &va[i].buffer); + f->glGetVertexAttribPointerv(i, GL_VERTEX_ATTRIB_ARRAY_POINTER, &va[i].pointer); + } + } + ~StateSaver() { + if (saved) { + f->glUseProgram(program); + f->glBindTexture(GL_TEXTURE_2D, texture); + f->glActiveTexture(activeTexture); + f->glFrontFace(frontFace); + if (cull) + f->glEnable(GL_CULL_FACE); + else + f->glDisable(GL_CULL_FACE); + if (depthTest) + f->glEnable(GL_DEPTH_TEST); + else + f->glDisable(GL_DEPTH_TEST); + if (blend) + f->glEnable(GL_BLEND); + else + f->glDisable(GL_BLEND); + f->glBlendFuncSeparate(blendFunc[0], blendFunc[1], blendFunc[2], blendFunc[3]); + f->glBindBuffer(GL_ARRAY_BUFFER, arrayBuf); + if (vaoHelper->isValid()) + vaoHelper->glBindVertexArray(vao); + for (int i = 0; i < 2; ++i) { + if (va[i].enabled) + f->glEnableVertexAttribArray(i); + else + f->glDisableVertexAttribArray(i); + f->glBindBuffer(GL_ARRAY_BUFFER, va[i].buffer); + f->glVertexAttribPointer(i, va[i].size, va[i].type, va[i].normalized, va[i].stride, va[i].pointer); + } + } + delete vaoHelper; + } + QOpenGLFunctions *f; + QOpenGLVertexArrayObjectHelper *vaoHelper; + bool saved; + GLint program; + GLint texture; + GLint activeTexture; + GLint frontFace; + bool cull; + bool depthTest; + bool blend; + GLint blendFunc[4]; + GLint vao; + GLint arrayBuf; + struct { GLint enabled, type, size, normalized, stride, buffer; GLvoid *pointer; } va[2]; +}; + void QEglFSCursor::draw(const QRectF &r) { + StateSaver stateSaver; + if (!m_program) { // one time initialization initializeOpenGLFunctions(); @@ -373,13 +473,16 @@ void QEglFSCursor::draw(const QRectF &r) glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, m_cursor.texture); - glBindBuffer(GL_ARRAY_BUFFER, 0); - m_program->enableAttributeArray(m_vertexCoordEntry); - m_program->enableAttributeArray(m_textureCoordEntry); + if (stateSaver.vaoHelper->isValid()) + stateSaver.vaoHelper->glBindVertexArray(0); - m_program->setAttributeArray(m_vertexCoordEntry, cursorCoordinates, 2); - m_program->setAttributeArray(m_textureCoordEntry, textureCoordinates, 2); + glBindBuffer(GL_ARRAY_BUFFER, 0); + + m_program->enableAttributeArray(0); + m_program->enableAttributeArray(1); + m_program->setAttributeArray(0, cursorCoordinates, 2); + m_program->setAttributeArray(1, textureCoordinates, 2); m_program->setUniformValue(m_textureEntry, 0); @@ -388,13 +491,11 @@ void QEglFSCursor::draw(const QRectF &r) glEnable(GL_BLEND); glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); glDisable(GL_DEPTH_TEST); // disable depth testing to make sure cursor is always on top - glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); - glDisable(GL_BLEND); - glBindTexture(GL_TEXTURE_2D, 0); - m_program->disableAttributeArray(m_textureCoordEntry); - m_program->disableAttributeArray(m_vertexCoordEntry); + glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); + m_program->disableAttributeArray(0); + m_program->disableAttributeArray(1); m_program->release(); } |