diff options
Diffstat (limited to 'src/plugins/scenegraph/d3d12/qsgd3d12glyphcache.cpp')
| -rw-r--r-- | src/plugins/scenegraph/d3d12/qsgd3d12glyphcache.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/plugins/scenegraph/d3d12/qsgd3d12glyphcache.cpp b/src/plugins/scenegraph/d3d12/qsgd3d12glyphcache.cpp new file mode 100644 index 0000000000..45ef202e83 --- /dev/null +++ b/src/plugins/scenegraph/d3d12/qsgd3d12glyphcache.cpp @@ -0,0 +1,184 @@ +/**************************************************************************** +** +** 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 "qsgd3d12glyphcache_p.h" +#include "qsgd3d12engine_p.h" + +QT_BEGIN_NAMESPACE + +// NOTE: Avoid categorized logging. It is slow. + +#define DECLARE_DEBUG_VAR(variable) \ + static bool debug_ ## variable() \ + { static bool value = qgetenv("QSG_RENDERER_DEBUG").contains(QT_STRINGIFY(variable)); return value; } + +DECLARE_DEBUG_VAR(render) + +QSGD3D12GlyphCache::QSGD3D12GlyphCache(QSGD3D12Engine *engine, QFontEngine::GlyphFormat format, const QTransform &matrix) + : QTextureGlyphCache(format, matrix), + m_engine(engine) +{ +} + +QSGD3D12GlyphCache::~QSGD3D12GlyphCache() +{ + if (m_id) + m_engine->releaseTexture(m_id); +} + +void QSGD3D12GlyphCache::createTextureData(int width, int height) +{ + width = qMax(128, width); + height = qMax(32, height); + + m_id = m_engine->genTexture(); + Q_ASSERT(m_id); + + if (Q_UNLIKELY(debug_render())) + qDebug("new glyph cache texture %u of size %dx%d, fontengine format %d", m_id, width, height, m_format); + + m_size = QSize(width, height); + + const QImage::Format imageFormat = + m_format == QFontEngine::Format_A8 ? QImage::Format_Alpha8 : QImage::Format_ARGB32_Premultiplied; + m_engine->createTexture(m_id, m_size, imageFormat, QSGD3D12Engine::TextureWithAlpha); +} + +void QSGD3D12GlyphCache::resizeTextureData(int width, int height) +{ + width = qMax(128, width); + height = qMax(32, height); + + if (m_size.width() >= width && m_size.height() >= height) + return; + + if (Q_UNLIKELY(debug_render())) + qDebug("glyph cache texture %u resize to %dx%d", m_id, width, height); + + m_size = QSize(width, height); + + m_engine->queueTextureResize(m_id, m_size); +} + +void QSGD3D12GlyphCache::beginFillTexture() +{ + Q_ASSERT(m_glyphImages.isEmpty() && m_glyphPos.isEmpty()); +} + +void QSGD3D12GlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition) +{ + QImage mask = textureMapForGlyph(glyph, subPixelPosition); + const int maskWidth = mask.width(); + const int maskHeight = mask.height(); + + if (mask.format() == QImage::Format_Mono) { + mask = mask.convertToFormat(QImage::Format_Indexed8); + for (int y = 0; y < maskHeight; ++y) { + uchar *src = mask.scanLine(y); + for (int x = 0; x < maskWidth; ++x) + src[x] = -src[x]; // convert 0 and 1 into 0 and 255 + } + } else if (mask.depth() == 32) { + if (mask.format() == QImage::Format_RGB32) { + // We need to make the alpha component equal to the average of the RGB values. + // This is needed when drawing sub-pixel antialiased text on translucent targets. + for (int y = 0; y < maskHeight; ++y) { + QRgb *src = reinterpret_cast<QRgb *>(mask.scanLine(y)); + for (int x = 0; x < maskWidth; ++x) { + const int r = qRed(src[x]); + const int g = qGreen(src[x]); + const int b = qBlue(src[x]); + int avg; + if (mask.format() == QImage::Format_RGB32) + avg = (r + g + b + 1) / 3; // "+1" for rounding. + else // Format_ARGB32_Premultiplied + avg = qAlpha(src[x]); + src[x] = qRgba(r, g, b, avg); + } + } + } + } + + m_glyphImages.append(mask); + m_glyphPos.append(QPoint(c.x, c.y)); +} + +void QSGD3D12GlyphCache::endFillTexture() +{ + if (m_glyphImages.isEmpty()) + return; + + Q_ASSERT(m_id); + + m_engine->queueTextureUpload(m_id, m_glyphImages, m_glyphPos); + + // Nothing else left to do, it is up to the text material to call + // useTexture() which will then add the texture dependency to the frame. + + m_glyphImages.clear(); + m_glyphPos.clear(); +} + +int QSGD3D12GlyphCache::glyphPadding() const +{ + return 1; +} + +int QSGD3D12GlyphCache::maxTextureWidth() const +{ + return 16384; +} + +int QSGD3D12GlyphCache::maxTextureHeight() const +{ + return 16384; +} + +void QSGD3D12GlyphCache::useTexture() +{ + if (m_id) + m_engine->useTexture(m_id); +} + +QSize QSGD3D12GlyphCache::currentSize() const +{ + return m_size; +} + +QT_END_NAMESPACE |