void KisQPainterCanvas::resizeEvent(QResizeEvent *e)
{
QSize size(e->size());
if (size.width() <= 0) {
size.setWidth(1);
}
if (size.height() <= 0) {
size.setHeight(1);
}
coordinatesConverter()->setCanvasWidgetSize(size);
m_d->prescaledProjection->notifyCanvasSizeChanged(size);
}
void KisQPainterCanvas::paintEvent(QPaintEvent * ev)
{
KisImageWSP image = canvas()->image();
if (image == 0) return;
setAutoFillBackground(false);
if (m_buffer.size() != size()) {
m_buffer = QImage(size(), QImage::Format_ARGB32_Premultiplied);
}
QPainter gc(&m_buffer);
// we double buffer, so we paint on an image first, then from the image onto the canvas,
// so copy the clip region since otherwise we're filling the whole buffer every time with
// the background color _and_ the transparent squares.
gc.setClipRegion(ev->region());
KisCoordinatesConverter *converter = coordinatesConverter();
QTransform imageTransform = converter->viewportToWidgetTransform();
gc.save();
gc.setCompositionMode(QPainter::CompositionMode_Source);
gc.fillRect(QRect(QPoint(0, 0), size()), borderColor());
QTransform checkersTransform;
QPointF brushOrigin;
QPolygonF polygon;
converter->getQPainterCheckersInfo(&checkersTransform, &brushOrigin, &polygon);
gc.setPen(Qt::NoPen);
gc.setBrush(m_d->checkBrush);
gc.setBrushOrigin(brushOrigin);
gc.setTransform(checkersTransform);
gc.drawPolygon(polygon);
gc.setTransform(imageTransform);
gc.setRenderHint(QPainter::SmoothPixmapTransform, true);
QRectF viewportRect = converter->widgetToViewport(ev->rect());
gc.setCompositionMode(QPainter::CompositionMode_SourceOver);
gc.drawImage(viewportRect, m_d->prescaledProjection->prescaledQImage(),
viewportRect);
gc.restore();
#ifdef DEBUG_REPAINT
QColor color = QColor(random() % 255, random() % 255, random() % 255, 150);
gc.fillRect(ev->rect(), color);
#endif
drawDecorations(gc, ev->rect());
gc.end();
QPainter painter(this);
painter.drawImage(ev->rect(), m_buffer, ev->rect());
}
void KisOpenGLCanvas2::renderDecorations(QPainter *painter)
{
QRect boundingRect = coordinatesConverter()->imageRectInWidgetPixels().toAlignedRect();
drawDecorations(*painter, boundingRect);
}
void KisOpenGLCanvas2::drawImage()
{
if (!d->displayShader) {
return;
}
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
KisCoordinatesConverter *converter = coordinatesConverter();
d->displayShader->bind();
QMatrix4x4 projectionMatrix;
projectionMatrix.setToIdentity();
projectionMatrix.ortho(0, width(), height(), 0, NEAR_VAL, FAR_VAL);
// Set view/projection matrices
QMatrix4x4 modelMatrix(coordinatesConverter()->imageToWidgetTransform());
modelMatrix.optimize();
modelMatrix = projectionMatrix * modelMatrix;
d->displayShader->setUniformValue(d->displayShader->location(Uniform::ModelViewProjection), modelMatrix);
QMatrix4x4 textureMatrix;
textureMatrix.setToIdentity();
d->displayShader->setUniformValue(d->displayShader->location(Uniform::TextureMatrix), textureMatrix);
QRectF widgetRect(0,0, width(), height());
QRectF widgetRectInImagePixels = converter->documentToImage(converter->widgetToDocument(widgetRect));
qreal scaleX, scaleY;
converter->imageScale(&scaleX, &scaleY);
d->displayShader->setUniformValue(d->displayShader->location(Uniform::ViewportScale), (GLfloat) scaleX);
d->displayShader->setUniformValue(d->displayShader->location(Uniform::TexelSize), (GLfloat) d->openGLImageTextures->texelSize());
QRect ir = d->openGLImageTextures->storedImageBounds();
QRect wr = widgetRectInImagePixels.toAlignedRect();
if (!d->wrapAroundMode) {
// if we don't want to paint wrapping images, just limit the
// processing area, and the code will handle all the rest
wr &= ir;
}
int firstColumn = d->xToColWithWrapCompensation(wr.left(), ir);
int lastColumn = d->xToColWithWrapCompensation(wr.right(), ir);
int firstRow = d->yToRowWithWrapCompensation(wr.top(), ir);
int lastRow = d->yToRowWithWrapCompensation(wr.bottom(), ir);
int minColumn = d->openGLImageTextures->xToCol(ir.left());
int maxColumn = d->openGLImageTextures->xToCol(ir.right());
int minRow = d->openGLImageTextures->yToRow(ir.top());
int maxRow = d->openGLImageTextures->yToRow(ir.bottom());
int imageColumns = maxColumn - minColumn + 1;
int imageRows = maxRow - minRow + 1;
for (int col = firstColumn; col <= lastColumn; col++) {
for (int row = firstRow; row <= lastRow; row++) {
int effectiveCol = col;
int effectiveRow = row;
QPointF tileWrappingTranslation;
if (effectiveCol > maxColumn || effectiveCol < minColumn) {
int translationStep = floor(qreal(col) / imageColumns);
int originCol = translationStep * imageColumns;
effectiveCol = col - originCol;
tileWrappingTranslation.rx() = translationStep * ir.width();
}
if (effectiveRow > maxRow || effectiveRow < minRow) {
int translationStep = floor(qreal(row) / imageRows);
int originRow = translationStep * imageRows;
effectiveRow = row - originRow;
tileWrappingTranslation.ry() = translationStep * ir.height();
}
KisTextureTile *tile =
d->openGLImageTextures->getTextureTileCR(effectiveCol, effectiveRow);
if (!tile) {
warnUI << "OpenGL: Trying to paint texture tile but it has not been created yet.";
continue;
}
/*
* We create a float rect here to workaround Qt's
* "history reasons" in calculation of right()
* and bottom() coordinates of integer rects.
*/
QRectF textureRect(tile->tileRectInTexturePixels());
QRectF modelRect(tile->tileRectInImagePixels().translated(tileWrappingTranslation.x(), tileWrappingTranslation.y()));
//Setup the geometry for rendering
if (KisOpenGL::hasOpenGL3()) {
rectToVertices(d->vertices, modelRect);
d->quadBuffers[0].bind();
d->quadBuffers[0].write(0, d->vertices, 3 * 6 * sizeof(float));
rectToTexCoords(d->texCoords, textureRect);
d->quadBuffers[1].bind();
d->quadBuffers[1].write(0, d->texCoords, 2 * 6 * sizeof(float));
}
else {
rectToVertices(d->vertices, modelRect);
d->displayShader->enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
d->displayShader->setAttributeArray(PROGRAM_VERTEX_ATTRIBUTE, d->vertices);
rectToTexCoords(d->texCoords, textureRect);
d->displayShader->enableAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE);
d->displayShader->setAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE, d->texCoords);
}
if (d->displayFilter) {
glActiveTexture(GL_TEXTURE0 + 1);
glBindTexture(GL_TEXTURE_3D, d->displayFilter->lutTexture());
d->displayShader->setUniformValue(d->displayShader->location(Uniform::Texture1), 1);
}
int currentLodPlane = tile->currentLodPlane();
if (d->displayShader->location(Uniform::FixedLodLevel) >= 0) {
d->displayShader->setUniformValue(d->displayShader->location(Uniform::FixedLodLevel),
(GLfloat) currentLodPlane);
}
glActiveTexture(GL_TEXTURE0);
tile->bindToActiveTexture();
if (currentLodPlane > 0) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
} else if (SCALE_MORE_OR_EQUAL_TO(scaleX, scaleY, 2.0)) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
switch(d->filterMode) {
case KisOpenGL::NearestFilterMode:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
break;
case KisOpenGL::BilinearFilterMode:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
break;
case KisOpenGL::TrilinearFilterMode:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
break;
case KisOpenGL::HighQualityFiltering:
if (SCALE_LESS_THAN(scaleX, scaleY, 0.5)) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
break;
}
}
glDrawArrays(GL_TRIANGLES, 0, 6);
}
}
glBindTexture(GL_TEXTURE_2D, 0);
d->displayShader->release();
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
void KisOpenGLCanvas2::drawCheckers()
{
if (!d->checkerShader) {
return;
}
KisCoordinatesConverter *converter = coordinatesConverter();
QTransform textureTransform;
QTransform modelTransform;
QRectF textureRect;
QRectF modelRect;
QRectF viewportRect = !d->wrapAroundMode ?
converter->imageRectInViewportPixels() :
converter->widgetToViewport(this->rect());
converter->getOpenGLCheckersInfo(viewportRect,
&textureTransform, &modelTransform, &textureRect, &modelRect, d->scrollCheckers);
textureTransform *= QTransform::fromScale(d->checkSizeScale / KisOpenGLImageTextures::BACKGROUND_TEXTURE_SIZE,
d->checkSizeScale / KisOpenGLImageTextures::BACKGROUND_TEXTURE_SIZE);
if (!d->checkerShader->bind()) {
qWarning() << "Could not bind checker shader";
return;
}
QMatrix4x4 projectionMatrix;
projectionMatrix.setToIdentity();
projectionMatrix.ortho(0, width(), height(), 0, NEAR_VAL, FAR_VAL);
// Set view/projection matrices
QMatrix4x4 modelMatrix(modelTransform);
modelMatrix.optimize();
modelMatrix = projectionMatrix * modelMatrix;
d->checkerShader->setUniformValue(d->checkerShader->location(Uniform::ModelViewProjection), modelMatrix);
QMatrix4x4 textureMatrix(textureTransform);
d->checkerShader->setUniformValue(d->checkerShader->location(Uniform::TextureMatrix), textureMatrix);
//Setup the geometry for rendering
if (KisOpenGL::hasOpenGL3()) {
rectToVertices(d->vertices, modelRect);
d->quadBuffers[0].bind();
d->quadBuffers[0].write(0, d->vertices, 3 * 6 * sizeof(float));
rectToTexCoords(d->texCoords, textureRect);
d->quadBuffers[1].bind();
d->quadBuffers[1].write(0, d->texCoords, 2 * 6 * sizeof(float));
}
else {
rectToVertices(d->vertices, modelRect);
d->checkerShader->enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
d->checkerShader->setAttributeArray(PROGRAM_VERTEX_ATTRIBUTE, d->vertices);
rectToTexCoords(d->texCoords, textureRect);
d->checkerShader->enableAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE);
d->checkerShader->setAttributeArray(PROGRAM_TEXCOORD_ATTRIBUTE, d->texCoords);
}
// render checkers
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, d->openGLImageTextures->checkerTexture());
glDrawArrays(GL_TRIANGLES, 0, 6);
glBindTexture(GL_TEXTURE_2D, 0);
d->checkerShader->release();
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
void KisOpenGLCanvas2::paintToolOutline(const QPainterPath &path)
{
d->cursorShader->bind();
// setup the mvp transformation
KisCoordinatesConverter *converter = coordinatesConverter();
QMatrix4x4 projectionMatrix;
projectionMatrix.setToIdentity();
projectionMatrix.ortho(0, width(), height(), 0, NEAR_VAL, FAR_VAL);
// Set view/projection matrices
QMatrix4x4 modelMatrix(converter->flakeToWidgetTransform());
modelMatrix.optimize();
modelMatrix = projectionMatrix * modelMatrix;
d->cursorShader->setUniformValue(d->cursorShader->location(Uniform::ModelViewProjection), modelMatrix);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
// XXX: glLogicOp not in ES 2.0 -- it would be better to use another method.
// It is defined in 3.1 core profile onward.
// Actually, https://www.opengl.org/sdk/docs/man/html/glLogicOp.xhtml says it's in 2.0 onwards,
// only not in ES, but we don't care about ES, so we could use the function directly.
glEnable(GL_COLOR_LOGIC_OP);
if (ptr_glLogicOp) {
ptr_glLogicOp(GL_XOR);
}
// Paint the tool outline
if (KisOpenGL::hasOpenGL3()) {
d->outlineVAO.bind();
d->lineBuffer.bind();
}
// Convert every disjointed subpath to a polygon and draw that polygon
QList<QPolygonF> subPathPolygons = path.toSubpathPolygons();
for (int i = 0; i < subPathPolygons.size(); i++) {
const QPolygonF& polygon = subPathPolygons.at(i);
QVector<QVector3D> vertices;
vertices.resize(polygon.count());
for (int j = 0; j < polygon.count(); j++) {
QPointF p = polygon.at(j);
vertices[j].setX(p.x());
vertices[j].setY(p.y());
}
if (KisOpenGL::hasOpenGL3()) {
d->lineBuffer.allocate(vertices.constData(), 3 * vertices.size() * sizeof(float));
}
else {
d->cursorShader->enableAttributeArray(PROGRAM_VERTEX_ATTRIBUTE);
d->cursorShader->setAttributeArray(PROGRAM_VERTEX_ATTRIBUTE, vertices.constData());
}
glDrawArrays(GL_LINE_STRIP, 0, vertices.size());
}
if (KisOpenGL::hasOpenGL3()) {
d->lineBuffer.release();
d->outlineVAO.release();
}
glDisable(GL_COLOR_LOGIC_OP);
d->cursorShader->release();
}
void KisOpenGLCanvas2::resizeGL(int width, int height)
{
coordinatesConverter()->setCanvasWidgetSize(QSize(width, height));
paintGL();
}
