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Diffstat (limited to 'src/quick/scenegraph/qsgbasicinternalimagenode.cpp')
| -rw-r--r-- | src/quick/scenegraph/qsgbasicinternalimagenode.cpp | 559 |
1 files changed, 559 insertions, 0 deletions
diff --git a/src/quick/scenegraph/qsgbasicinternalimagenode.cpp b/src/quick/scenegraph/qsgbasicinternalimagenode.cpp new file mode 100644 index 0000000000..685a51550d --- /dev/null +++ b/src/quick/scenegraph/qsgbasicinternalimagenode.cpp @@ -0,0 +1,559 @@ +/**************************************************************************** +** +** 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 "qsgbasicinternalimagenode_p.h" + +#include <QtCore/qvarlengtharray.h> +#include <QtCore/qmath.h> + +QT_BEGIN_NAMESPACE + +namespace +{ + struct SmoothVertex + { + float x, y, u, v; + float dx, dy, du, dv; + }; + + const QSGGeometry::AttributeSet &smoothAttributeSet() + { + static QSGGeometry::Attribute data[] = { + QSGGeometry::Attribute::createWithSemantic(0, 2, QSGGeometry::TypeFloat, QSGGeometry::Attribute::POSITION), + QSGGeometry::Attribute::createWithSemantic(1, 2, QSGGeometry::TypeFloat, QSGGeometry::Attribute::TEXCOORD), + QSGGeometry::Attribute::createWithSemantic(2, 2, QSGGeometry::TypeFloat, QSGGeometry::Attribute::TEXCOORD1), + QSGGeometry::Attribute::createWithSemantic(3, 2, QSGGeometry::TypeFloat, QSGGeometry::Attribute::TEXCOORD2) + }; + static QSGGeometry::AttributeSet attrs = { 4, sizeof(SmoothVertex), data }; + return attrs; + } +} + +QSGBasicInternalImageNode::QSGBasicInternalImageNode() + : m_innerSourceRect(0, 0, 1, 1) + , m_subSourceRect(0, 0, 1, 1) + , m_antialiasing(false) + , m_mirror(false) + , m_dirtyGeometry(false) + , m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4) + , m_dynamicTexture(nullptr) +{ + setGeometry(&m_geometry); + +#ifdef QSG_RUNTIME_DESCRIPTION + qsgnode_set_description(this, QLatin1String("internalimage")); +#endif +} + +void QSGBasicInternalImageNode::setTargetRect(const QRectF &rect) +{ + if (rect == m_targetRect) + return; + m_targetRect = rect; + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setInnerTargetRect(const QRectF &rect) +{ + if (rect == m_innerTargetRect) + return; + m_innerTargetRect = rect; + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setInnerSourceRect(const QRectF &rect) +{ + if (rect == m_innerSourceRect) + return; + m_innerSourceRect = rect; + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setSubSourceRect(const QRectF &rect) +{ + if (rect == m_subSourceRect) + return; + m_subSourceRect = rect; + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setTexture(QSGTexture *texture) +{ + Q_ASSERT(texture); + + setMaterialTexture(texture); + updateMaterialBlending(); + + markDirty(DirtyMaterial); + + // Because the texture can be a different part of the atlas, we need to update it... + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setAntialiasing(bool antialiasing) +{ + if (antialiasing == m_antialiasing) + return; + m_antialiasing = antialiasing; + if (m_antialiasing) { + setGeometry(new QSGGeometry(smoothAttributeSet(), 0)); + setFlag(OwnsGeometry, true); + } else { + setGeometry(&m_geometry); + setFlag(OwnsGeometry, false); + } + updateMaterialAntialiasing(); + m_dirtyGeometry = true; +} + +void QSGBasicInternalImageNode::setMirror(bool mirror) +{ + if (mirror == m_mirror) + return; + m_mirror = mirror; + m_dirtyGeometry = true; +} + + +void QSGBasicInternalImageNode::update() +{ + if (m_dirtyGeometry) + updateGeometry(); +} + +void QSGBasicInternalImageNode::preprocess() +{ + bool doDirty = false; + QSGDynamicTexture *t = qobject_cast<QSGDynamicTexture *>(materialTexture()); + if (t) { + doDirty = t->updateTexture(); + if (doDirty) { + // The geometry may need updating. This is expensive however, so do + // it only when something relevant has changed. + if (t != m_dynamicTexture + || t->textureSize() != m_dynamicTextureSize + || t->normalizedTextureSubRect() != m_dynamicTextureSubRect) { + updateGeometry(); + m_dynamicTextureSize = t->textureSize(); + m_dynamicTextureSubRect = t->normalizedTextureSubRect(); + } + } + } + m_dynamicTexture = t; + + if (updateMaterialBlending()) + doDirty = true; + + if (doDirty) + markDirty(DirtyMaterial); +} + +namespace { + struct X { float x, tx; }; + struct Y { float y, ty; }; +} + +static inline void appendQuad(quint16 **indices, quint16 topLeft, quint16 topRight, + quint16 bottomLeft, quint16 bottomRight) +{ + *(*indices)++ = topLeft; + *(*indices)++ = bottomLeft; + *(*indices)++ = bottomRight; + *(*indices)++ = bottomRight; + *(*indices)++ = topRight; + *(*indices)++ = topLeft; +} + +QSGGeometry *QSGBasicInternalImageNode::updateGeometry(const QRectF &targetRect, + const QRectF &innerTargetRect, + const QRectF &sourceRect, + const QRectF &innerSourceRect, + const QRectF &subSourceRect, + QSGGeometry *geometry, + bool mirror, + bool antialiasing) +{ + int floorLeft = qFloor(subSourceRect.left()); + int ceilRight = qCeil(subSourceRect.right()); + int floorTop = qFloor(subSourceRect.top()); + int ceilBottom = qCeil(subSourceRect.bottom()); + int hTiles = ceilRight - floorLeft; + int vTiles = ceilBottom - floorTop; + + int hCells = hTiles; + int vCells = vTiles; + if (innerTargetRect.width() == 0) + hCells = 0; + if (innerTargetRect.left() != targetRect.left()) + ++hCells; + if (innerTargetRect.right() != targetRect.right()) + ++hCells; + if (innerTargetRect.height() == 0) + vCells = 0; + if (innerTargetRect.top() != targetRect.top()) + ++vCells; + if (innerTargetRect.bottom() != targetRect.bottom()) + ++vCells; + QVarLengthArray<X, 32> xData(2 * hCells); + QVarLengthArray<Y, 32> yData(2 * vCells); + X *xs = xData.data(); + Y *ys = yData.data(); + + if (innerTargetRect.left() != targetRect.left()) { + xs[0].x = targetRect.left(); + xs[0].tx = sourceRect.left(); + xs[1].x = innerTargetRect.left(); + xs[1].tx = innerSourceRect.left(); + xs += 2; + } + if (innerTargetRect.width() != 0) { + xs[0].x = innerTargetRect.left(); + xs[0].tx = innerSourceRect.x() + (subSourceRect.left() - floorLeft) * innerSourceRect.width(); + ++xs; + float b = innerTargetRect.width() / subSourceRect.width(); + float a = innerTargetRect.x() - subSourceRect.x() * b; + for (int i = floorLeft + 1; i <= ceilRight - 1; ++i) { + xs[0].x = xs[1].x = a + b * i; + xs[0].tx = innerSourceRect.right(); + xs[1].tx = innerSourceRect.left(); + xs += 2; + } + xs[0].x = innerTargetRect.right(); + xs[0].tx = innerSourceRect.x() + (subSourceRect.right() - ceilRight + 1) * innerSourceRect.width(); + ++xs; + } + if (innerTargetRect.right() != targetRect.right()) { + xs[0].x = innerTargetRect.right(); + xs[0].tx = innerSourceRect.right(); + xs[1].x = targetRect.right(); + xs[1].tx = sourceRect.right(); + xs += 2; + } + Q_ASSERT(xs == xData.data() + xData.size()); + if (mirror) { + float leftPlusRight = targetRect.left() + targetRect.right(); + int count = xData.size(); + xs = xData.data(); + for (int i = 0; i < count >> 1; ++i) + qSwap(xs[i], xs[count - 1 - i]); + for (int i = 0; i < count; ++i) + xs[i].x = leftPlusRight - xs[i].x; + } + + if (innerTargetRect.top() != targetRect.top()) { + ys[0].y = targetRect.top(); + ys[0].ty = sourceRect.top(); + ys[1].y = innerTargetRect.top(); + ys[1].ty = innerSourceRect.top(); + ys += 2; + } + if (innerTargetRect.height() != 0) { + ys[0].y = innerTargetRect.top(); + ys[0].ty = innerSourceRect.y() + (subSourceRect.top() - floorTop) * innerSourceRect.height(); + ++ys; + float b = innerTargetRect.height() / subSourceRect.height(); + float a = innerTargetRect.y() - subSourceRect.y() * b; + for (int i = floorTop + 1; i <= ceilBottom - 1; ++i) { + ys[0].y = ys[1].y = a + b * i; + ys[0].ty = innerSourceRect.bottom(); + ys[1].ty = innerSourceRect.top(); + ys += 2; + } + ys[0].y = innerTargetRect.bottom(); + ys[0].ty = innerSourceRect.y() + (subSourceRect.bottom() - ceilBottom + 1) * innerSourceRect.height(); + ++ys; + } + if (innerTargetRect.bottom() != targetRect.bottom()) { + ys[0].y = innerTargetRect.bottom(); + ys[0].ty = innerSourceRect.bottom(); + ys[1].y = targetRect.bottom(); + ys[1].ty = sourceRect.bottom(); + ys += 2; + } + Q_ASSERT(ys == yData.data() + yData.size()); + + if (antialiasing) { + QSGGeometry *g = geometry; + Q_ASSERT(g); + + g->allocate(hCells * vCells * 4 + (hCells + vCells - 1) * 4, + hCells * vCells * 6 + (hCells + vCells) * 12); + g->setDrawingMode(QSGGeometry::DrawTriangles); + SmoothVertex *vertices = reinterpret_cast<SmoothVertex *>(g->vertexData()); + memset(vertices, 0, g->vertexCount() * g->sizeOfVertex()); + quint16 *indices = g->indexDataAsUShort(); + + // The deltas are how much the fuzziness can reach into the image. + // Only the border vertices are moved by the vertex shader, so the fuzziness + // can't reach further into the image than the closest interior vertices. + float leftDx = xData.at(1).x - xData.at(0).x; + float rightDx = xData.at(xData.size() - 1).x - xData.at(xData.size() - 2).x; + float topDy = yData.at(1).y - yData.at(0).y; + float bottomDy = yData.at(yData.size() - 1).y - yData.at(yData.size() - 2).y; + + float leftDu = xData.at(1).tx - xData.at(0).tx; + float rightDu = xData.at(xData.size() - 1).tx - xData.at(xData.size() - 2).tx; + float topDv = yData.at(1).ty - yData.at(0).ty; + float bottomDv = yData.at(yData.size() - 1).ty - yData.at(yData.size() - 2).ty; + + if (hCells == 1) { + leftDx = rightDx *= 0.5f; + leftDu = rightDu *= 0.5f; + } + if (vCells == 1) { + topDy = bottomDy *= 0.5f; + topDv = bottomDv *= 0.5f; + } + + // This delta is how much the fuzziness can reach out from the image. + float delta = float(qAbs(targetRect.width()) < qAbs(targetRect.height()) + ? targetRect.width() : targetRect.height()) * 0.5f; + + quint16 index = 0; + ys = yData.data(); + for (int j = 0; j < vCells; ++j, ys += 2) { + xs = xData.data(); + bool isTop = j == 0; + bool isBottom = j == vCells - 1; + for (int i = 0; i < hCells; ++i, xs += 2) { + bool isLeft = i == 0; + bool isRight = i == hCells - 1; + + SmoothVertex *v = vertices + index; + + quint16 topLeft = index; + for (int k = (isTop || isLeft ? 2 : 1); k--; ++v, ++index) { + v->x = xs[0].x; + v->u = xs[0].tx; + v->y = ys[0].y; + v->v = ys[0].ty; + } + + quint16 topRight = index; + for (int k = (isTop || isRight ? 2 : 1); k--; ++v, ++index) { + v->x = xs[1].x; + v->u = xs[1].tx; + v->y = ys[0].y; + v->v = ys[0].ty; + } + + quint16 bottomLeft = index; + for (int k = (isBottom || isLeft ? 2 : 1); k--; ++v, ++index) { + v->x = xs[0].x; + v->u = xs[0].tx; + v->y = ys[1].y; + v->v = ys[1].ty; + } + + quint16 bottomRight = index; + for (int k = (isBottom || isRight ? 2 : 1); k--; ++v, ++index) { + v->x = xs[1].x; + v->u = xs[1].tx; + v->y = ys[1].y; + v->v = ys[1].ty; + } + + appendQuad(&indices, topLeft, topRight, bottomLeft, bottomRight); + + if (isTop) { + vertices[topLeft].dy = vertices[topRight].dy = topDy; + vertices[topLeft].dv = vertices[topRight].dv = topDv; + vertices[topLeft + 1].dy = vertices[topRight + 1].dy = -delta; + appendQuad(&indices, topLeft + 1, topRight + 1, topLeft, topRight); + } + + if (isBottom) { + vertices[bottomLeft].dy = vertices[bottomRight].dy = -bottomDy; + vertices[bottomLeft].dv = vertices[bottomRight].dv = -bottomDv; + vertices[bottomLeft + 1].dy = vertices[bottomRight + 1].dy = delta; + appendQuad(&indices, bottomLeft, bottomRight, bottomLeft + 1, bottomRight + 1); + } + + if (isLeft) { + vertices[topLeft].dx = vertices[bottomLeft].dx = leftDx; + vertices[topLeft].du = vertices[bottomLeft].du = leftDu; + vertices[topLeft + 1].dx = vertices[bottomLeft + 1].dx = -delta; + appendQuad(&indices, topLeft + 1, topLeft, bottomLeft + 1, bottomLeft); + } + + if (isRight) { + vertices[topRight].dx = vertices[bottomRight].dx = -rightDx; + vertices[topRight].du = vertices[bottomRight].du = -rightDu; + vertices[topRight + 1].dx = vertices[bottomRight + 1].dx = delta; + appendQuad(&indices, topRight, topRight + 1, bottomRight, bottomRight + 1); + } + } + } + + Q_ASSERT(index == g->vertexCount()); + Q_ASSERT(indices - g->indexCount() == g->indexData()); + } else { + if (!geometry) { + geometry = new QSGGeometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), + hCells * vCells * 4, hCells * vCells * 6, + QSGGeometry::TypeUnsignedShort); + } else { + geometry->allocate(hCells * vCells * 4, hCells * vCells * 6); + } + geometry->setDrawingMode(QSGGeometry::DrawTriangles); + QSGGeometry::TexturedPoint2D *vertices = geometry->vertexDataAsTexturedPoint2D(); + ys = yData.data(); + for (int j = 0; j < vCells; ++j, ys += 2) { + xs = xData.data(); + for (int i = 0; i < hCells; ++i, xs += 2) { + vertices[0].x = vertices[2].x = xs[0].x; + vertices[0].tx = vertices[2].tx = xs[0].tx; + vertices[1].x = vertices[3].x = xs[1].x; + vertices[1].tx = vertices[3].tx = xs[1].tx; + + vertices[0].y = vertices[1].y = ys[0].y; + vertices[0].ty = vertices[1].ty = ys[0].ty; + vertices[2].y = vertices[3].y = ys[1].y; + vertices[2].ty = vertices[3].ty = ys[1].ty; + + vertices += 4; + } + } + + quint16 *indices = geometry->indexDataAsUShort(); + for (int i = 0; i < 4 * vCells * hCells; i += 4) + appendQuad(&indices, i, i + 1, i + 2, i + 3); + } + return geometry; +} + +void QSGBasicInternalImageNode::updateGeometry() +{ + Q_ASSERT(!m_targetRect.isEmpty()); + const QSGTexture *t = materialTexture(); + if (!t) { + QSGGeometry *g = geometry(); + g->allocate(4); + g->setDrawingMode(QSGGeometry::DrawTriangleStrip); + memset(g->vertexData(), 0, g->sizeOfVertex() * 4); + } else { + QRectF sourceRect = t->normalizedTextureSubRect(); + + QRectF innerSourceRect(sourceRect.x() + m_innerSourceRect.x() * sourceRect.width(), + sourceRect.y() + m_innerSourceRect.y() * sourceRect.height(), + m_innerSourceRect.width() * sourceRect.width(), + m_innerSourceRect.height() * sourceRect.height()); + + bool hasMargins = m_targetRect != m_innerTargetRect; + + int floorLeft = qFloor(m_subSourceRect.left()); + int ceilRight = qCeil(m_subSourceRect.right()); + int floorTop = qFloor(m_subSourceRect.top()); + int ceilBottom = qCeil(m_subSourceRect.bottom()); + int hTiles = ceilRight - floorLeft; + int vTiles = ceilBottom - floorTop; + + bool hasTiles = hTiles != 1 || vTiles != 1; + bool fullTexture = innerSourceRect == QRectF(0, 0, 1, 1); + + // An image can be rendered as a single quad if: + // - There are no margins, and either: + // - the image isn't repeated + // - the source rectangle fills the entire texture so that texture wrapping can be used, + // and NPOT is supported + if (!hasMargins && (!hasTiles || (fullTexture && supportsWrap(t->textureSize())))) { + QRectF sr; + if (!fullTexture) { + sr = QRectF(innerSourceRect.x() + (m_subSourceRect.left() - floorLeft) * innerSourceRect.width(), + innerSourceRect.y() + (m_subSourceRect.top() - floorTop) * innerSourceRect.height(), + m_subSourceRect.width() * innerSourceRect.width(), + m_subSourceRect.height() * innerSourceRect.height()); + } else { + sr = QRectF(m_subSourceRect.left() - floorLeft, m_subSourceRect.top() - floorTop, + m_subSourceRect.width(), m_subSourceRect.height()); + } + if (m_mirror) { + qreal oldLeft = sr.left(); + sr.setLeft(sr.right()); + sr.setRight(oldLeft); + } + + if (m_antialiasing) { + QSGGeometry *g = geometry(); + Q_ASSERT(g != &m_geometry); + g->allocate(8, 14); + g->setDrawingMode(QSGGeometry::DrawTriangleStrip); + SmoothVertex *vertices = reinterpret_cast<SmoothVertex *>(g->vertexData()); + float delta = float(qAbs(m_targetRect.width()) < qAbs(m_targetRect.height()) + ? m_targetRect.width() : m_targetRect.height()) * 0.5f; + float sx = float(sr.width() / m_targetRect.width()); + float sy = float(sr.height() / m_targetRect.height()); + for (int d = -1; d <= 1; d += 2) { + for (int j = 0; j < 2; ++j) { + for (int i = 0; i < 2; ++i, ++vertices) { + vertices->x = m_targetRect.x() + i * m_targetRect.width(); + vertices->y = m_targetRect.y() + j * m_targetRect.height(); + vertices->u = sr.x() + i * sr.width(); + vertices->v = sr.y() + j * sr.height(); + vertices->dx = (i == 0 ? delta : -delta) * d; + vertices->dy = (j == 0 ? delta : -delta) * d; + vertices->du = (d < 0 ? 0 : vertices->dx * sx); + vertices->dv = (d < 0 ? 0 : vertices->dy * sy); + } + } + } + Q_ASSERT(vertices - g->vertexCount() == g->vertexData()); + static const quint16 indices[] = { + 0, 4, 1, 5, 3, 7, 2, 6, 0, 4, + 4, 6, 5, 7 + }; + Q_ASSERT(g->sizeOfIndex() * g->indexCount() == sizeof(indices)); + memcpy(g->indexDataAsUShort(), indices, sizeof(indices)); + } else { + m_geometry.allocate(4); + m_geometry.setDrawingMode(QSGGeometry::DrawTriangleStrip); + QSGGeometry::updateTexturedRectGeometry(&m_geometry, m_targetRect, sr); + } + } else { + QSGGeometry *g = m_antialiasing ? geometry() : &m_geometry; + updateGeometry(m_targetRect, m_innerTargetRect, + sourceRect, innerSourceRect, m_subSourceRect, + g, m_mirror, m_antialiasing); + } + } + markDirty(DirtyGeometry); + m_dirtyGeometry = false; +} + +QT_END_NAMESPACE |