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Jocelyn Turcotte authored
This also removed experimental API uses from the quicknanobrowser example, which should be used mainly for documentation purposes. The quicktestbrowser should be the one that we use from now on as a raw testbed of new APIs. As with other targets in the tests directory, it will only be built by default if Qt is configured with -developer-build (and without -nomake tests). Change-Id: Ib4461c898cd3227bbb810493daac4d841d0d8f3e Reviewed-by:Pierre Rossi <pierre.rossi@gmail.com>
c117207e
/******************************************************************************** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the QtGui module of the Qt Toolkit.**** $QT_BEGIN_LICENSE:LGPL21$** 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 Digia. For licensing terms and** conditions see http://qt.digia.com/licensing. For further information** use the contact form at http://qt.digia.com/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 2.1 or version 3 as published by the Free** Software Foundation and appearing in the file LICENSE.LGPLv21 and** LICENSE.LGPLv3 included in the packaging of this file. Please review the** following information to ensure the GNU Lesser General Public License** requirements will be met: https://www.gnu.org/licenses/lgpl.html and** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.**** In addition, as a special exception, Digia gives you certain additional** rights. These rights are described in the Digia Qt LGPL Exception** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** $QT_END_LICENSE$******************************************************************************/#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_NAMESPACEQBasicAtomicInt qopengltextureglyphcache_serial_number = Q_BASIC_ATOMIC_INITIALIZER(1);QOpenGLTextureGlyphCache::QOpenGLTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix) : QImageTextureGlyphCache(format, matrix) , m_textureResource(0) , pex(0) , m_blitProgram(0) , m_filterMode(Nearest) , m_serialNumber(qopengltextureglyphcache_serial_number.fetchAndAddRelaxed(1)) , 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;7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
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();
}
static inline bool isCoreProfile()
{
return QOpenGLContext::currentContext()->format().profile() == QSurfaceFormat::CoreProfile;
}
void QOpenGLTextureGlyphCache::createTextureData(int width, int height)
{
QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext());
if (ctx == 0) {
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 = 0;
}
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
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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();
}
void QOpenGLTextureGlyphCache::resizeTextureData(int width, int height)
{
QOpenGLContext *ctx = QOpenGLContext::currentContext();
if (ctx == 0) {
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);
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
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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);
QOpenGLShaderProgram *blitProgram = 0;
if (pex == 0) {
if (m_blitProgram == 0) {
m_blitProgram = new QOpenGLShaderProgram(ctx);
const bool isCoreProfile = ctx->format().profile() == QSurfaceFormat::CoreProfile;
{
QString source;
source.append(QLatin1String(isCoreProfile ? qopenglslMainWithTexCoordsVertexShader_core : qopenglslMainWithTexCoordsVertexShader));
source.append(QLatin1String(isCoreProfile ? qopenglslUntransformedPositionVertexShader_core : qopenglslUntransformedPositionVertexShader));
QOpenGLShader *vertexShader = new QOpenGLShader(QOpenGLShader::Vertex, m_blitProgram);
vertexShader->compileSourceCode(source);
m_blitProgram->addShader(vertexShader);
}
{
QString source;
source.append(QLatin1String(isCoreProfile ? qopenglslMainFragmentShader_core : qopenglslMainFragmentShader));
source.append(QLatin1String(isCoreProfile ? qopenglslImageSrcFragmentShader_core : qopenglslImageSrcFragmentShader));
QOpenGLShader *fragmentShader = new QOpenGLShader(QOpenGLShader::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();
if (m_vao.isCreated()) {
m_vao.bind();
setupVertexAttribs();
}
}
if (m_vao.isCreated())
m_vao.bind();
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else
setupVertexAttribs();
m_blitProgram->bind();
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, (GLuint)oldFbo);
if (pex != 0) {
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 == 0) {
qWarning("QOpenGLTextureGlyphCache::fillTexture: Called with no context");
return;
}
QOpenGLFunctions *funcs = ctx->functions();
if (ctx->d_func()->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) {
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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) {
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.
#if Q_BYTE_ORDER == Q_BIG_ENDIAN
|| mask.format() == QImage::Format_ARGB32_Premultiplied
#else
|| (mask.format() == QImage::Format_ARGB32_Premultiplied
&& ctx->isOpenGLES())
#endif
) {
for (int y = 0; y < maskHeight; ++y) {
QRgb *src = (QRgb *) 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]);
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, m_textureResource->m_texture);
if (mask.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, c.x, c.y, maskWidth, maskHeight, fmt, GL_UNSIGNED_BYTE, mask.bits());
} else {
// The scanlines in mask 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, c.x, c.y, maskWidth, maskHeight, format, GL_UNSIGNED_BYTE, mask.bits());
}
}
int QOpenGLTextureGlyphCache::glyphPadding() const
{
return 1;
}
int QOpenGLTextureGlyphCache::maxTextureWidth() const
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{
QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext());
if (ctx == 0)
return QImageTextureGlyphCache::maxTextureWidth();
else
return ctx->d_func()->maxTextureSize();
}
int QOpenGLTextureGlyphCache::maxTextureHeight() const
{
QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext());
if (ctx == 0)
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 = 0;
m_w = 0;
m_h = 0;
m_cx = 0;
m_cy = 0;
m_currentRowHeight = 0;
coords.clear();
}
QT_END_NAMESPACE