diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp')
-rw-r--r-- | src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp | 414 |
1 files changed, 0 insertions, 414 deletions
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp b/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp deleted file mode 100644 index d5ce4efd1a..0000000000 --- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl.cpp +++ /dev/null @@ -1,414 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtOpenGL 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 "qtextureglyphcache_gl_p.h" -#include "qpaintengineex_opengl2_p.h" -#include "qglfunctions.h" -#include "private/qglengineshadersource_p.h" - -QT_BEGIN_NAMESPACE - - -static int next_qgltextureglyphcache_serial_number() -{ - static QBasicAtomicInt serial = Q_BASIC_ATOMIC_INITIALIZER(0); - return 1 + serial.fetchAndAddRelaxed(1); -} - -QGLTextureGlyphCache::QGLTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix) - : QImageTextureGlyphCache(format, matrix) - , m_textureResource(0) - , pex(0) - , m_blitProgram(0) - , m_filterMode(Nearest) - , m_serialNumber(next_qgltextureglyphcache_serial_number()) -{ -#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG - qDebug(" -> QGLTextureGlyphCache() %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; -} - -QGLTextureGlyphCache::~QGLTextureGlyphCache() -{ -#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG - qDebug(" -> ~QGLTextureGlyphCache() %p.", this); -#endif - delete m_blitProgram; - if (m_textureResource) - m_textureResource->free(); -} - -void QGLTextureGlyphCache::createTextureData(int width, int height) -{ - QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); - if (ctx == 0) { - qWarning("QGLTextureGlyphCache::createTextureData: Called with no context"); - return; - } - QOpenGLFunctions *funcs = ctx->contextHandle()->functions(); - - // 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 ((!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->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 = 0; - } - - if (!m_textureResource) - m_textureResource = new QGLGlyphTexture(ctx); - - 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) { - 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; - funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, 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; -} - -void QGLTextureGlyphCache::resizeTextureData(int width, int height) -{ - QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); - if (ctx == 0) { - qWarning("QGLTextureGlyphCache::resizeTextureData: Called with no context"); - return; - } - QOpenGLFunctions *funcs = ctx->contextHandle()->functions(); - - 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 (!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->workaround_brokenFBOReadBack) { - QImageTextureGlyphCache::resizeTextureData(width, height); - Q_ASSERT(image().depth() == 8); - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, oldHeight, GL_ALPHA, GL_UNSIGNED_BYTE, image().constBits()); - funcs->glDeleteTextures(1, &oldTexture); - return; - } - - // ### the QTextureGlyphCache API needs to be reworked to allow - // ### resizeTextureData to fail - - ctx->d_ptr->refreshCurrentFbo(); - - 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, NULL); - 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 != 0) - 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); - - QGLShaderProgram *blitProgram = 0; - if (pex == 0) { - if (m_blitProgram == 0) { - m_blitProgram = new QGLShaderProgram(ctx); - - { - QString source; - source.append(QLatin1String(qglslMainWithTexCoordsVertexShader)); - source.append(QLatin1String(qglslUntransformedPositionVertexShader)); - - QGLShader *vertexShader = new QGLShader(QGLShader::Vertex, m_blitProgram); - vertexShader->compileSourceCode(source); - - m_blitProgram->addShader(vertexShader); - } - - { - QString source; - source.append(QLatin1String(qglslMainFragmentShader)); - source.append(QLatin1String(qglslImageSrcFragmentShader)); - - QGLShader *fragmentShader = new QGLShader(QGLShader::Fragment, m_blitProgram); - fragmentShader->compileSourceCode(source); - - m_blitProgram->addShader(fragmentShader); - } - - m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR); - m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR); - - m_blitProgram->link(); - } - - funcs->glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_vertexCoordinateArray); - funcs->glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_textureCoordinateArray); - - m_blitProgram->bind(); - m_blitProgram->enableAttributeArray(int(QT_VERTEX_COORDS_ATTR)); - m_blitProgram->enableAttributeArray(int(QT_TEXTURE_COORDS_ATTR)); - m_blitProgram->disableAttributeArray(int(QT_OPACITY_ATTR)); - - blitProgram = m_blitProgram; - - } else { - pex->setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, m_vertexCoordinateArray); - pex->setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, m_textureCoordinateArray); - - 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, ctx->d_ptr->current_fbo); - - if (pex != 0) { - funcs->glViewport(0, 0, pex->width, pex->height); - pex->updateClipScissorTest(); - } -} - -void QGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition) -{ - QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); - if (ctx == 0) { - qWarning("QGLTextureGlyphCache::fillTexture: Called with no context"); - return; - } - QOpenGLFunctions *funcs = ctx->contextHandle()->functions(); - - if (!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->workaround_brokenFBOReadBack) { - QImageTextureGlyphCache::fillTexture(c, glyph, subPixelPosition); - - funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture); - const QImage &texture = image(); - const uchar *bits = texture.constBits(); - bits += c.y * texture.bytesPerLine() + c.x; - for (int i=0; i<c.h; ++i) { - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, c.w, 1, GL_ALPHA, GL_UNSIGNED_BYTE, bits); - bits += texture.bytesPerLine(); - } - return; - } - - 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 = (uchar *) 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) { - // 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) { - quint32 *src = (quint32 *) mask.scanLine(y); - for (int x = 0; x < maskWidth; ++x) { - int r = qRed(src[x]); - int g = qGreen(src[x]); - int b = qBlue(src[x]); - int avg; - if (mask.format() == QImage::Format_RGB32) - avg = (r + g + b + 1) / 3; // "+1" for rounding. - else // Format_ARGB_Premultiplied - avg = qAlpha(src[x]); - if (ctx->contextHandle()->isOpenGLES()) { - // swizzle the bits to accommodate for the GL_RGBA upload. - src[x] = (avg << 24) | (r << 0) | (g << 8) | (b << 16); - } else { - src[x] = (src[x] & 0x00ffffff) | (avg << 24); - } - } - } - } - - funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture); - if (mask.depth() == 32) { - GLenum format = GL_RGBA; -#if !defined(QT_OPENGL_ES_2) - if (!ctx->contextHandle()->isOpenGLES()) - format = GL_BGRA; -#endif - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, format, GL_UNSIGNED_BYTE, mask.bits()); - } else { - // glTexSubImage2D() might cause some garbage to appear in the texture if the mask width is - // not a multiple of four bytes. The bug appeared on a computer with 32-bit Windows Vista - // and nVidia GeForce 8500GT. GL_UNPACK_ALIGNMENT is set to four bytes, 'mask' has a - // multiple of four bytes per line, and most of the glyph shows up correctly in the - // texture, which makes me think that this is a driver bug. - // One workaround is to make sure the mask width is a multiple of four bytes, for instance - // by converting it to a format with four bytes per pixel. Another is to copy one line at a - // time. - - if (!ctx->d_ptr->workaround_brokenAlphaTexSubImage_init) { - // don't know which driver versions exhibit this bug, so be conservative for now - const QByteArray vendorString(reinterpret_cast<const char*>(funcs->glGetString(GL_VENDOR))); - ctx->d_ptr->workaround_brokenAlphaTexSubImage = vendorString.indexOf("NVIDIA") >= 0; - ctx->d_ptr->workaround_brokenAlphaTexSubImage_init = true; - } - - if (ctx->d_ptr->workaround_brokenAlphaTexSubImage) { - for (int i = 0; i < maskHeight; ++i) - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, maskWidth, 1, GL_ALPHA, GL_UNSIGNED_BYTE, mask.scanLine(i)); - } else { - funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_ALPHA, GL_UNSIGNED_BYTE, mask.bits()); - } - } -} - -int QGLTextureGlyphCache::glyphPadding() const -{ - return 1; -} - -int QGLTextureGlyphCache::maxTextureWidth() const -{ - QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); - if (ctx == 0) - return QImageTextureGlyphCache::maxTextureWidth(); - else - return ctx->d_ptr->maxTextureSize(); -} - -int QGLTextureGlyphCache::maxTextureHeight() const -{ - QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); - if (ctx == 0) - return QImageTextureGlyphCache::maxTextureHeight(); - - if (ctx->d_ptr->workaround_brokenTexSubImage) - return qMin(1024, ctx->d_ptr->maxTextureSize()); - else - return ctx->d_ptr->maxTextureSize(); -} - -void QGLTextureGlyphCache::clear() -{ - m_textureResource->free(); - m_textureResource = 0; - - m_w = 0; - m_h = 0; - m_cx = 0; - m_cy = 0; - m_currentRowHeight = 0; - coords.clear(); -} - -QT_END_NAMESPACE |