diff options
Diffstat (limited to 'src/gui/opengl/qopengltextureglyphcache.cpp')
| -rw-r--r-- | src/gui/opengl/qopengltextureglyphcache.cpp | 485 |
1 files changed, 0 insertions, 485 deletions
diff --git a/src/gui/opengl/qopengltextureglyphcache.cpp b/src/gui/opengl/qopengltextureglyphcache.cpp deleted file mode 100644 index 41027d26e0..0000000000 --- a/src/gui/opengl/qopengltextureglyphcache.cpp +++ /dev/null @@ -1,485 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtGui 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 "qopengltextureglyphcache_p.h" -#include "qopenglpaintengine_p.h" -#include "private/qopenglengineshadersource_p.h" -#include "qopenglextensions_p.h" -#include <qrgb.h> -#include <private/qdrawhelper_p.h> - -QT_BEGIN_NAMESPACE - - -static int next_qopengltextureglyphcache_serial_number() -{ - static QBasicAtomicInt serial = Q_BASIC_ATOMIC_INITIALIZER(0); - return 1 + serial.fetchAndAddRelaxed(1); -} - -QOpenGLTextureGlyphCache::QOpenGLTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix, const QColor &color) - : QImageTextureGlyphCache(format, matrix, color) - , m_textureResource(nullptr) - , pex(nullptr) - , m_blitProgram(nullptr) - , m_filterMode(Nearest) - , m_serialNumber(next_qopengltextureglyphcache_serial_number()) - , m_buffer(QOpenGLBuffer::VertexBuffer) -{ -#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG - qDebug(" -> QOpenGLTextureGlyphCache() %p for context %p.", this, QOpenGLContext::currentContext()); -#endif - m_vertexCoordinateArray[0] = -1.0f; - m_vertexCoordinateArray[1] = -1.0f; - m_vertexCoordinateArray[2] = 1.0f; - m_vertexCoordinateArray[3] = -1.0f; - m_vertexCoordinateArray[4] = 1.0f; - m_vertexCoordinateArray[5] = 1.0f; - m_vertexCoordinateArray[6] = -1.0f; - m_vertexCoordinateArray[7] = 1.0f; - - m_textureCoordinateArray[0] = 0.0f; - m_textureCoordinateArray[1] = 0.0f; - m_textureCoordinateArray[2] = 1.0f; - m_textureCoordinateArray[3] = 0.0f; - m_textureCoordinateArray[4] = 1.0f; - m_textureCoordinateArray[5] = 1.0f; - m_textureCoordinateArray[6] = 0.0f; - m_textureCoordinateArray[7] = 1.0f; -} - -QOpenGLTextureGlyphCache::~QOpenGLTextureGlyphCache() -{ -#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG - qDebug(" -> ~QOpenGLTextureGlyphCache() %p.", this); -#endif - clear(); -} - -#if !defined(QT_OPENGL_ES_2) -static inline bool isCoreProfile() -{ - return QOpenGLContext::currentContext()->format().profile() == QSurfaceFormat::CoreProfile; -} -#endif - -void QOpenGLTextureGlyphCache::createTextureData(int width, int height) -{ - QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext()); - if (ctx == nullptr) { - qWarning("QOpenGLTextureGlyphCache::createTextureData: Called with no context"); - return; - } - - // create in QImageTextureGlyphCache baseclass is meant to be called - // only to create the initial image and does not preserve the content, - // so we don't call when this function is called from resize. - if (ctx->d_func()->workaround_brokenFBOReadBack && image().isNull()) - QImageTextureGlyphCache::createTextureData(width, height); - - // Make the lower glyph texture size 16 x 16. - if (width < 16) - width = 16; - if (height < 16) - height = 16; - - if (m_textureResource && !m_textureResource->m_texture) { - delete m_textureResource; - m_textureResource = nullptr; - } - - if (!m_textureResource) - m_textureResource = new QOpenGLGlyphTexture(ctx); - - QOpenGLFunctions *funcs = ctx->functions(); - funcs->glGenTextures(1, &m_textureResource->m_texture); - funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture); - - m_textureResource->m_width = width; - m_textureResource->m_height = height; - - if (m_format == QFontEngine::Format_A32 || m_format == QFontEngine::Format_ARGB) { - QVarLengthArray<uchar> data(width * height * 4); - for (int i = 0; i < data.size(); ++i) - data[i] = 0; - funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]); - } else { - QVarLengthArray<uchar> data(width * height); - for (int i = 0; i < data.size(); ++i) - data[i] = 0; -#if !defined(QT_OPENGL_ES_2) - const GLint internalFormat = isCoreProfile() ? GL_R8 : GL_ALPHA; - const GLenum format = isCoreProfile() ? GL_RED : GL_ALPHA; -#else - const GLint internalFormat = GL_ALPHA; - const GLenum format = GL_ALPHA; -#endif - funcs->glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, GL_UNSIGNED_BYTE, &data[0]); - } - - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - m_filterMode = Nearest; - - if (!m_buffer.isCreated()) { - m_buffer.create(); - m_buffer.bind(); - static GLfloat buf[sizeof(m_vertexCoordinateArray) + sizeof(m_textureCoordinateArray)]; - memcpy(buf, m_vertexCoordinateArray, sizeof(m_vertexCoordinateArray)); - memcpy(buf + (sizeof(m_vertexCoordinateArray) / sizeof(GLfloat)), - m_textureCoordinateArray, - sizeof(m_textureCoordinateArray)); - m_buffer.allocate(buf, sizeof(buf)); - m_buffer.release(); - } - - if (!m_vao.isCreated()) - m_vao.create(); -} - -void QOpenGLTextureGlyphCache::setupVertexAttribs() -{ - m_buffer.bind(); - m_blitProgram->setAttributeBuffer(int(QT_VERTEX_COORDS_ATTR), GL_FLOAT, 0, 2); - m_blitProgram->setAttributeBuffer(int(QT_TEXTURE_COORDS_ATTR), GL_FLOAT, sizeof(m_vertexCoordinateArray), 2); - m_blitProgram->enableAttributeArray(int(QT_VERTEX_COORDS_ATTR)); - m_blitProgram->enableAttributeArray(int(QT_TEXTURE_COORDS_ATTR)); - m_buffer.release(); -} - -static void load_glyph_image_to_texture(QOpenGLContext *ctx, - QImage &img, - GLuint texture, - int tx, int ty) -{ - QOpenGLFunctions *funcs = ctx->functions(); - - const int imgWidth = img.width(); - const int imgHeight = img.height(); - - if (img.format() == QImage::Format_Mono) { - img = img.convertToFormat(QImage::Format_Grayscale8); - } else if (img.depth() == 32) { - if (img.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. -#if Q_BYTE_ORDER == Q_BIG_ENDIAN - || img.format() == QImage::Format_ARGB32_Premultiplied -#else - || (img.format() == QImage::Format_ARGB32_Premultiplied - && ctx->isOpenGLES()) -#endif - ) { - for (int y = 0; y < imgHeight; ++y) { - QRgb *src = (QRgb *) img.scanLine(y); - for (int x = 0; x < imgWidth; ++x) { - int r = qRed(src[x]); - int g = qGreen(src[x]); - int b = qBlue(src[x]); - int avg; - if (img.format() == QImage::Format_RGB32) - avg = (r + g + b + 1) / 3; // "+1" for rounding. - else // Format_ARGB_Premultiplied - avg = qAlpha(src[x]); - - src[x] = qRgba(r, g, b, avg); - // swizzle the bits to accommodate for the GL_RGBA upload. -#if Q_BYTE_ORDER != Q_BIG_ENDIAN - if (ctx->isOpenGLES()) -#endif - src[x] = ARGB2RGBA(src[x]); - } - } - } - } - - funcs->glBindTexture(GL_TEXTURE_2D, texture); - if (img.depth() == 32) { -#ifdef QT_OPENGL_ES_2 - GLenum fmt = GL_RGBA; -#else - GLenum fmt = ctx->isOpenGLES() ? GL_RGBA : GL_BGRA; -#endif // QT_OPENGL_ES_2 - -#if Q_BYTE_ORDER == Q_BIG_ENDIAN - fmt = GL_RGBA; -#endif - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, tx, ty, imgWidth, imgHeight, fmt, GL_UNSIGNED_BYTE, img.constBits()); - } else { - // The scanlines in image are 32-bit aligned, even for mono or 8-bit formats. This - // is good because it matches the default of 4 bytes for GL_UNPACK_ALIGNMENT. -#if !defined(QT_OPENGL_ES_2) - const GLenum format = isCoreProfile() ? GL_RED : GL_ALPHA; -#else - const GLenum format = GL_ALPHA; -#endif - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, tx, ty, imgWidth, imgHeight, format, GL_UNSIGNED_BYTE, img.constBits()); - } -} - -static void load_glyph_image_region_to_texture(QOpenGLContext *ctx, - const QImage &srcImg, - int x, int y, - int w, int h, - GLuint texture, - int tx, int ty) -{ - Q_ASSERT(x + w <= srcImg.width() && y + h <= srcImg.height()); - - QImage img; - if (x != 0 || y != 0 || w != srcImg.width() || h != srcImg.height()) - img = srcImg.copy(x, y, w, h); - else - img = srcImg; - - load_glyph_image_to_texture(ctx, img, texture, tx, ty); -} - -void QOpenGLTextureGlyphCache::resizeTextureData(int width, int height) -{ - QOpenGLContext *ctx = QOpenGLContext::currentContext(); - if (ctx == nullptr) { - qWarning("QOpenGLTextureGlyphCache::resizeTextureData: Called with no context"); - return; - } - - QOpenGLFunctions *funcs = ctx->functions(); - GLint oldFbo; - funcs->glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFbo); - - int oldWidth = m_textureResource->m_width; - int oldHeight = m_textureResource->m_height; - - // Make the lower glyph texture size 16 x 16. - if (width < 16) - width = 16; - if (height < 16) - height = 16; - - GLuint oldTexture = m_textureResource->m_texture; - createTextureData(width, height); - - if (ctx->d_func()->workaround_brokenFBOReadBack) { - QImageTextureGlyphCache::resizeTextureData(width, height); - load_glyph_image_region_to_texture(ctx, image(), 0, 0, qMin(oldWidth, width), qMin(oldHeight, height), - m_textureResource->m_texture, 0, 0); - return; - } - - // ### the QTextureGlyphCache API needs to be reworked to allow - // ### resizeTextureData to fail - - funcs->glBindFramebuffer(GL_FRAMEBUFFER, m_textureResource->m_fbo); - - GLuint tmp_texture; - funcs->glGenTextures(1, &tmp_texture); - funcs->glBindTexture(GL_TEXTURE_2D, tmp_texture); - funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, oldWidth, oldHeight, 0, - GL_RGBA, GL_UNSIGNED_BYTE, nullptr); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - m_filterMode = Nearest; - funcs->glBindTexture(GL_TEXTURE_2D, 0); - funcs->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, - GL_TEXTURE_2D, tmp_texture, 0); - - funcs->glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT); - funcs->glBindTexture(GL_TEXTURE_2D, oldTexture); - - if (pex != nullptr) - pex->transferMode(BrushDrawingMode); - - funcs->glDisable(GL_STENCIL_TEST); - funcs->glDisable(GL_DEPTH_TEST); - funcs->glDisable(GL_SCISSOR_TEST); - funcs->glDisable(GL_BLEND); - - funcs->glViewport(0, 0, oldWidth, oldHeight); - - QOpenGLShaderProgram *blitProgram = nullptr; - if (pex == nullptr) { - if (m_blitProgram == nullptr) { - m_blitProgram = new QOpenGLShaderProgram; - const bool isCoreProfile = ctx->format().profile() == QSurfaceFormat::CoreProfile; - - { - QString source; -#ifdef Q_OS_WASM - source.append(QLatin1String(isCoreProfile ? qopenglslUntransformedPositionVertexShader_core : qopenglslUntransformedPositionVertexShader)); - source.append(QLatin1String(isCoreProfile ? qopenglslMainWithTexCoordsVertexShader_core : qopenglslMainWithTexCoordsVertexShader)); -#else - source.append(QLatin1String(isCoreProfile ? qopenglslMainWithTexCoordsVertexShader_core : qopenglslMainWithTexCoordsVertexShader)); - source.append(QLatin1String(isCoreProfile ? qopenglslUntransformedPositionVertexShader_core : qopenglslUntransformedPositionVertexShader)); -#endif - m_blitProgram->addCacheableShaderFromSourceCode(QOpenGLShader::Vertex, source); - } - - { - QString source; -#ifdef Q_OS_WASM - source.append(QLatin1String(isCoreProfile ? qopenglslImageSrcFragmentShader_core : qopenglslImageSrcFragmentShader)); - source.append(QLatin1String(isCoreProfile ? qopenglslMainFragmentShader_core : qopenglslMainFragmentShader)); -#else - source.append(QLatin1String(isCoreProfile ? qopenglslMainFragmentShader_core : qopenglslMainFragmentShader)); - source.append(QLatin1String(isCoreProfile ? qopenglslImageSrcFragmentShader_core : qopenglslImageSrcFragmentShader)); -#endif - m_blitProgram->addCacheableShaderFromSourceCode(QOpenGLShader::Fragment, source); - } - - m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR); - m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR); - - m_blitProgram->link(); - - if (m_vao.isCreated()) { - m_vao.bind(); - setupVertexAttribs(); - } - } - - if (m_vao.isCreated()) - m_vao.bind(); - else - setupVertexAttribs(); - - m_blitProgram->bind(); - blitProgram = m_blitProgram; - - } else { - pex->uploadData(QT_VERTEX_COORDS_ATTR, m_vertexCoordinateArray, 8); - pex->uploadData(QT_TEXTURE_COORDS_ATTR, m_textureCoordinateArray, 8); - - pex->shaderManager->useBlitProgram(); - blitProgram = pex->shaderManager->blitProgram(); - } - - blitProgram->setUniformValue("imageTexture", QT_IMAGE_TEXTURE_UNIT); - - funcs->glDrawArrays(GL_TRIANGLE_FAN, 0, 4); - - funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture); - - funcs->glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, oldWidth, oldHeight); - - funcs->glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, - GL_RENDERBUFFER, 0); - funcs->glDeleteTextures(1, &tmp_texture); - funcs->glDeleteTextures(1, &oldTexture); - - funcs->glBindFramebuffer(GL_FRAMEBUFFER, (GLuint)oldFbo); - - if (pex != nullptr) { - funcs->glViewport(0, 0, pex->width, pex->height); - pex->updateClipScissorTest(); - } else { - if (m_vao.isCreated()) { - m_vao.release(); - } else { - m_blitProgram->disableAttributeArray(int(QT_VERTEX_COORDS_ATTR)); - m_blitProgram->disableAttributeArray(int(QT_TEXTURE_COORDS_ATTR)); - } - } -} - -void QOpenGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition) -{ - QOpenGLContext *ctx = QOpenGLContext::currentContext(); - if (ctx == nullptr) { - qWarning("QOpenGLTextureGlyphCache::fillTexture: Called with no context"); - return; - } - - if (ctx->d_func()->workaround_brokenFBOReadBack) { - QImageTextureGlyphCache::fillTexture(c, glyph, subPixelPosition); - load_glyph_image_region_to_texture(ctx, image(), c.x, c.y, c.w, c.h, m_textureResource->m_texture, c.x, c.y); - return; - } - - QImage mask = textureMapForGlyph(glyph, subPixelPosition); - load_glyph_image_to_texture(ctx, mask, m_textureResource->m_texture, c.x, c.y); -} - -int QOpenGLTextureGlyphCache::glyphPadding() const -{ - return 1; -} - -int QOpenGLTextureGlyphCache::maxTextureWidth() const -{ - QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext()); - if (ctx == nullptr) - return QImageTextureGlyphCache::maxTextureWidth(); - else - return ctx->d_func()->maxTextureSize(); -} - -int QOpenGLTextureGlyphCache::maxTextureHeight() const -{ - QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext()); - if (ctx == nullptr) - return QImageTextureGlyphCache::maxTextureHeight(); - - if (ctx->d_func()->workaround_brokenTexSubImage) - return qMin(1024, ctx->d_func()->maxTextureSize()); - else - return ctx->d_func()->maxTextureSize(); -} - -void QOpenGLTextureGlyphCache::clear() -{ - if (m_textureResource) - m_textureResource->free(); - m_textureResource = nullptr; - - delete m_blitProgram; - m_blitProgram = nullptr; - - m_w = 0; - m_h = 0; - m_cx = 0; - m_cy = 0; - m_currentRowHeight = 0; - coords.clear(); -} - -QT_END_NAMESPACE |