diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp')
| -rw-r--r-- | src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp | 115 |
1 files changed, 110 insertions, 5 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp index 6a708b4..3fce384 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp @@ -62,6 +62,8 @@ and use the correct program when we really need it. */ +// #define QT_OPENGL_CACHE_AS_VBOS + #include "qpaintengineex_opengl2_p.h" #include <string.h> //for memcpy @@ -344,6 +346,13 @@ extern QImage qt_imageForBrush(int brushStyle, bool invert); QGL2PaintEngineExPrivate::~QGL2PaintEngineExPrivate() { delete shaderManager; + + while (pathCaches.size()) { + QVectorPath::CacheEntry *e = *(pathCaches.constBegin()); + e->cleanup(e->engine, e->data); + e->data = 0; + e->engine = 0; + } } void QGL2PaintEngineExPrivate::updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id) @@ -846,6 +855,30 @@ void QGL2PaintEngineExPrivate::transferMode(EngineMode newMode) mode = newMode; } +struct QGL2PEVectorPathCache +{ +#ifdef QT_OPENGL_CACHE_AS_VBOS + GLuint vbo; +#else + float *vertices; +#endif + int vertexCount; + GLenum primitiveType; + qreal iscale; +}; + +void qopengl2paintengine_cleanup_vectorpath(QPaintEngineEx *engine, void *data) +{ + QGL2PEVectorPathCache *c = (QGL2PEVectorPathCache *) data; +#ifdef QT_OPENGL_CACHE_AS_VBOS + QGL2PaintEngineExPrivate *d = QGL2PaintEngineExPrivate::getData((QGL2PaintEngineEx *) engine); + d->unusedVBOSToClean << c->vbo; +#else + qFree(c->vertices); +#endif + delete c; +} + // Assumes everything is configured for the brush you want to use void QGL2PaintEngineExPrivate::fill(const QVectorPath& path) { @@ -863,10 +896,74 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path) prepareForDraw(currentBrush->isOpaque()); composite(rect); } else if (path.isConvex()) { - vertexCoordinateArray.clear(); - vertexCoordinateArray.addPath(path, inverseScale, false); - prepareForDraw(currentBrush->isOpaque()); - drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN); + + if (path.isCacheable()) { + QVectorPath::CacheEntry *data = path.lookupCacheData(q); + QGL2PEVectorPathCache *cache; + + if (data) { + cache = (QGL2PEVectorPathCache *) data->data; + // Check if scale factor is exceeded for curved paths and generate curves if so... + if (path.isCurved()) { + qreal scaleFactor = cache->iscale / inverseScale; + if (scaleFactor < 0.5 || scaleFactor > 2.0) { +#ifdef QT_OPENGL_CACHE_AS_VBOS + glDeleteBuffers(1, &cache->vbo); + cache->vbo = 0; +#else + qFree(cache->vertices); +#endif + cache->vertexCount = 0; + } + } + } else { + cache = new QGL2PEVectorPathCache; + cache->vertexCount = 0; + data = const_cast<QVectorPath &>(path).addCacheData(q, cache, qopengl2paintengine_cleanup_vectorpath); + } + + // Flatten the path at the current scale factor and fill it into the cache struct. + if (!cache->vertexCount) { + vertexCoordinateArray.clear(); + vertexCoordinateArray.addPath(path, inverseScale, false); + int vertexCount = vertexCoordinateArray.vertexCount(); + int floatSizeInBytes = vertexCount * 2 * sizeof(float); + cache->vertexCount = vertexCount; + cache->primitiveType = GL_TRIANGLE_FAN; + cache->iscale = inverseScale; +#ifdef QT_OPENGL_CACHE_AS_VBOS + glGenBuffers(1, &cache->vbo); + glBindBuffer(GL_ARRAY_BUFFER, cache->vbo); + glBufferData(GL_ARRAY_BUFFER, floatSizeInBytes, vertexCoordinateArray.data(), GL_STATIC_DRAW); +#else + cache->vertices = (float *) qMalloc(floatSizeInBytes); + memcpy(cache->vertices, vertexCoordinateArray.data(), floatSizeInBytes); +#endif + } + + prepareForDraw(currentBrush->isOpaque()); + glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); +#ifdef QT_OPENGL_CACHE_AS_VBOS + glBindBuffer(GL_ARRAY_BUFFER, cache->vbo); + glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, false, 0, 0); +#else + glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, false, 0, cache->vertices); +#endif + glDrawArrays(cache->primitiveType, 0, cache->vertexCount); + + } else { + // printf(" - Marking path as cachable...\n"); + // Tag it for later so that if the same path is drawn twice, it is assumed to be static and thus cachable + // ### Remove before release... + static bool do_vectorpath_cache = qgetenv("QT_OPENGL_NO_PATH_CACHE").isEmpty(); + if (do_vectorpath_cache) + path.makeCacheable(); + vertexCoordinateArray.clear(); + vertexCoordinateArray.addPath(path, inverseScale, false); + prepareForDraw(currentBrush->isOpaque()); + drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN); + } + } else { // The path is too complicated & needs the stencil technique vertexCoordinateArray.clear(); @@ -1756,7 +1853,8 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev) d->device->beginPaint(); #if !defined(QT_OPENGL_ES_2) - bool success = qt_resolve_version_2_0_functions(d->ctx); + bool success = qt_resolve_version_2_0_functions(d->ctx) + && qt_resolve_buffer_extensions(d->ctx); Q_ASSERT(success); Q_UNUSED(success); #endif @@ -1817,6 +1915,13 @@ bool QGL2PaintEngineEx::end() delete d->shaderManager; d->shaderManager = 0; +#ifdef QT_OPENGL_CACHE_AS_VBOS + if (!d->unusedVBOSToClean.isEmpty()) { + glDeleteBuffers(d->unusedVBOSToClean.size(), d->unusedVBOSToClean.constData()); + d->unusedVBOSToClean.clear(); + } +#endif + return false; } |