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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qopengltexturecache_p.h"
#include <private/qopengltextureuploader_p.h>
#include <qmath.h>
#include <qopenglfunctions.h>
#include <private/qimagepixmapcleanuphooks_p.h>
#include <qpa/qplatformpixmap.h>
#include <qtopengl_tracepoints_p.h>
QT_BEGIN_NAMESPACE
class QOpenGLTextureCacheWrapper
{
public:
QOpenGLTextureCacheWrapper()
{
QImagePixmapCleanupHooks::instance()->addPlatformPixmapModificationHook(cleanupTexturesForPixmapData);
QImagePixmapCleanupHooks::instance()->addPlatformPixmapDestructionHook(cleanupTexturesForPixmapData);
QImagePixmapCleanupHooks::instance()->addImageHook(cleanupTexturesForCacheKey);
}
~QOpenGLTextureCacheWrapper()
{
QImagePixmapCleanupHooks::instance()->removePlatformPixmapModificationHook(cleanupTexturesForPixmapData);
QImagePixmapCleanupHooks::instance()->removePlatformPixmapDestructionHook(cleanupTexturesForPixmapData);
QImagePixmapCleanupHooks::instance()->removeImageHook(cleanupTexturesForCacheKey);
}
QOpenGLTextureCache *cacheForContext(QOpenGLContext *context) {
QMutexLocker lock(&m_mutex);
return m_resource.value<QOpenGLTextureCache>(context);
}
static void cleanupTexturesForCacheKey(qint64 key);
static void cleanupTexturesForPixmapData(QPlatformPixmap *pmd);
private:
QOpenGLMultiGroupSharedResource m_resource;
QMutex m_mutex;
};
Q_GLOBAL_STATIC(QOpenGLTextureCacheWrapper, qt_texture_caches)
QOpenGLTextureCache *QOpenGLTextureCache::cacheForContext(QOpenGLContext *context)
{
return qt_texture_caches()->cacheForContext(context);
}
void QOpenGLTextureCacheWrapper::cleanupTexturesForCacheKey(qint64 key)
{
QList<QOpenGLSharedResource *> resources = qt_texture_caches()->m_resource.resources();
for (QList<QOpenGLSharedResource *>::iterator it = resources.begin(); it != resources.end(); ++it)
static_cast<QOpenGLTextureCache *>(*it)->invalidate(key);
}
void QOpenGLTextureCacheWrapper::cleanupTexturesForPixmapData(QPlatformPixmap *pmd)
{
cleanupTexturesForCacheKey(pmd->cacheKey());
}
static quint64 cacheSize()
{
bool ok = false;
const int envCacheSize = qEnvironmentVariableIntValue("QT_OPENGL_TEXTURE_CACHE_SIZE", &ok);
if (ok)
return envCacheSize;
return 1024 * 1024; // 1024 MB cache default
}
QOpenGLTextureCache::QOpenGLTextureCache(QOpenGLContext *ctx)
: QOpenGLSharedResource(ctx->shareGroup())
, m_cache(cacheSize())
{
}
QOpenGLTextureCache::~QOpenGLTextureCache()
{
}
QOpenGLTextureCache::BindResult QOpenGLTextureCache::bindTexture(QOpenGLContext *context,
const QPixmap &pixmap,
QOpenGLTextureUploader::BindOptions options)
{
if (pixmap.isNull())
return { 0, {} };
QMutexLocker locker(&m_mutex);
qint64 key = pixmap.cacheKey();
// A QPainter is active on the image - take the safe route and replace the texture.
if (!pixmap.paintingActive()) {
QOpenGLCachedTexture *entry = m_cache.object(key);
if (entry && entry->options() == options) {
context->functions()->glBindTexture(GL_TEXTURE_2D, entry->id());
return { entry->id(), {} };
}
}
BindResult result = bindTexture(context, key, pixmap.toImage(), options);
if (result.id > 0)
QImagePixmapCleanupHooks::enableCleanupHooks(pixmap);
return result;
}
QOpenGLTextureCache::BindResult QOpenGLTextureCache::bindTexture(QOpenGLContext *context,
const QImage &image,
QOpenGLTextureUploader::BindOptions options)
{
if (image.isNull())
return { 0, {} };
QMutexLocker locker(&m_mutex);
qint64 key = image.cacheKey();
// A QPainter is active on the image - take the safe route and replace the texture.
if (!image.paintingActive()) {
QOpenGLCachedTexture *entry = m_cache.object(key);
if (entry && entry->options() == options) {
context->functions()->glBindTexture(GL_TEXTURE_2D, entry->id());
return { entry->id(), {} };
}
}
QImage img = image;
if (!context->functions()->hasOpenGLFeature(QOpenGLFunctions::NPOTTextures))
options |= QOpenGLTextureUploader::PowerOfTwoBindOption;
BindResult result = bindTexture(context, key, img, options);
if (result.id > 0)
QImagePixmapCleanupHooks::enableCleanupHooks(image);
return result;
}
Q_TRACE_POINT(qtopengl, QOpenGLTextureCache_bindTexture_entry, QOpenGLContext *context, qint64 key, const unsigned char *image, int options);
Q_TRACE_POINT(qtopengl, QOpenGLTextureCache_bindTexture_exit);
QOpenGLTextureCache::BindResult QOpenGLTextureCache::bindTexture(QOpenGLContext *context,
qint64 key,
const QImage &image,
QOpenGLTextureUploader::BindOptions options)
{
Q_TRACE_SCOPE(QOpenGLTextureCache_bindTexture, context, key, image.bits(), options);
GLuint id;
QOpenGLFunctions *funcs = context->functions();
funcs->glGenTextures(1, &id);
funcs->glBindTexture(GL_TEXTURE_2D, id);
int cost = QOpenGLTextureUploader::textureImage(GL_TEXTURE_2D, image, options);
m_cache.insert(key, new QOpenGLCachedTexture(id, options, context), cost / 1024);
return { id, BindResultFlag::NewTexture };
}
void QOpenGLTextureCache::invalidate(qint64 key)
{
QMutexLocker locker(&m_mutex);
m_cache.remove(key);
}
void QOpenGLTextureCache::invalidateResource()
{
m_cache.clear();
}
void QOpenGLTextureCache::freeResource(QOpenGLContext *)
{
Q_ASSERT(false); // the texture cache lives until the context group disappears
}
static void freeTexture(QOpenGLFunctions *funcs, GLuint id)
{
funcs->glDeleteTextures(1, &id);
}
QOpenGLCachedTexture::QOpenGLCachedTexture(GLuint id, QOpenGLTextureUploader::BindOptions options, QOpenGLContext *context) : m_options(options)
{
m_resource = new QOpenGLSharedResourceGuard(context, id, freeTexture);
}
QT_END_NAMESPACE
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