diff -r 56cd8111b7f7 -r 41300fa6a67c src/opengl/qgl.cpp --- a/src/opengl/qgl.cpp Tue Jan 26 12:42:25 2010 +0200 +++ b/src/opengl/qgl.cpp Tue Feb 02 00:43:10 2010 +0200 @@ -127,18 +127,6 @@ QGLExtensions::Extensions QGLExtensions::glExtensions = 0; bool QGLExtensions::nvidiaFboNeedsFinish = false; -#ifndef APIENTRY -# define APIENTRY -#endif -typedef void (APIENTRY *pfn_glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei, - GLsizei, GLint, GLsizei, const GLvoid *); -static pfn_glCompressedTexImage2DARB qt_glCompressedTexImage2DARB = 0; - - -#ifndef APIENTRY -#define APIENTRY -#endif - Q_GLOBAL_STATIC(QGLSignalProxy, theSignalProxy) QGLSignalProxy *QGLSignalProxy::instance() { @@ -184,8 +172,13 @@ engineType = QPaintEngine::OpenGL2; #else // We can't do this in the constructor for this object because it - // needs to be called *before* the QApplication constructor + // needs to be called *before* the QApplication constructor. + // Also check for the FragmentShader extension in conjunction with + // the 2.0 version flag, to cover the case where we export the display + // from an old GL 1.1 server to a GL 2.x client. In that case we can't + // use GL 2.0. if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0) + && (QGLExtensions::glExtensions & QGLExtensions::FragmentShader) && qgetenv("QT_GL_USE_OPENGL1ENGINE").isEmpty()) engineType = QPaintEngine::OpenGL2; else @@ -404,8 +397,7 @@ \i \link setDirectRendering() Direct rendering:\endlink Enabled. \i \link setOverlay() Overlay:\endlink Disabled. \i \link setPlane() Plane:\endlink 0 (i.e., normal plane). - \i \link setSampleBuffers() Multisample buffers:\endlink Enabled on - OpenGL/ES 2.0, disabled on other platforms. + \i \link setSampleBuffers() Multisample buffers:\endlink Disabled. \endlist */ @@ -1490,6 +1482,7 @@ version_flags_cached = false; version_flags = QGLFormat::OpenGL_Version_None; current_fbo = 0; + default_fbo = 0; active_engine = 0; } @@ -1773,10 +1766,12 @@ /*! \enum QGLContext::BindOption + \since 4.6 + A set of options to decide how to bind a texture using bindTexture(). \value NoBindOption Don't do anything, pass the texture straight - thru. + through. \value InvertedYBindOption Specifies that the texture should be flipped over the X axis so that the texture coordinate 0,0 corresponds to @@ -1879,118 +1874,42 @@ { } -typedef QHash QGLDDSCache; -Q_GLOBAL_STATIC(QGLDDSCache, qgl_dds_cache) - /*! \overload - Reads the DirectDrawSurface (DDS) compressed file \a fileName and - generates a 2D GL texture from it. - - Only the DXT1, DXT3 and DXT5 DDS formats are supported. - - Note that this will only work if the implementation supports the - \c GL_ARB_texture_compression and \c GL_EXT_texture_compression_s3tc - extensions. + Reads the compressed texture file \a fileName and generates a 2D GL + texture from it. + + This function can load DirectDrawSurface (DDS) textures in the + DXT1, DXT3 and DXT5 DDS formats if the \c GL_ARB_texture_compression + and \c GL_EXT_texture_compression_s3tc extensions are supported. + + Since 4.6.1, textures in the ETC1 format can be loaded if the + \c GL_OES_compressed_ETC1_RGB8_texture extension is supported + and the ETC1 texture has been encapsulated in the PVR container format. + Also, textures in the PVRTC2 and PVRTC4 formats can be loaded + if the \c GL_IMG_texture_compression_pvrtc extension is supported. \sa deleteTexture() */ GLuint QGLContext::bindTexture(const QString &fileName) { - if (!qt_glCompressedTexImage2DARB) { - qWarning("QGLContext::bindTexture(): The GL implementation does not support texture" - "compression extensions."); - return 0; - } - - QGLDDSCache::const_iterator it = qgl_dds_cache()->constFind(fileName); - if (it != qgl_dds_cache()->constEnd()) { + Q_D(QGLContext); + QGLDDSCache *dds_cache = &(d->group->m_dds_cache); + QGLDDSCache::const_iterator it = dds_cache->constFind(fileName); + if (it != dds_cache->constEnd()) { glBindTexture(GL_TEXTURE_2D, it.value()); return it.value(); } - QFile f(fileName); - f.open(QIODevice::ReadOnly); - - char tag[4]; - f.read(&tag[0], 4); - if (strncmp(tag,"DDS ", 4) != 0) { - qWarning("QGLContext::bindTexture(): not a DDS image file."); - return 0; - } - - DDSFormat ddsHeader; - f.read((char *) &ddsHeader, sizeof(DDSFormat)); - - if (!ddsHeader.dwLinearSize) { - qWarning("QGLContext::bindTexture() DDS image size is not valid."); - return 0; - } - - int factor = 4; - int bufferSize = 0; - int blockSize = 16; - GLenum format; - - switch(ddsHeader.ddsPixelFormat.dwFourCC) { - case FOURCC_DXT1: - format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; - factor = 2; - blockSize = 8; - break; - case FOURCC_DXT3: - format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; - break; - case FOURCC_DXT5: - format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; - break; - default: - qWarning("QGLContext::bindTexture() DDS image format not supported."); + QGLTexture texture(this); + QSize size = texture.bindCompressedTexture(fileName); + if (!size.isValid()) return 0; - } - - if (ddsHeader.dwMipMapCount > 1) - bufferSize = ddsHeader.dwLinearSize * factor; - else - bufferSize = ddsHeader.dwLinearSize; - - GLubyte *pixels = (GLubyte *) malloc(bufferSize*sizeof(GLubyte)); - f.seek(ddsHeader.dwSize + 4); - f.read((char *) pixels, bufferSize); - f.close(); - - GLuint tx_id; - glGenTextures(1, &tx_id); - glBindTexture(GL_TEXTURE_2D, tx_id); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - - int size; - int offset = 0; - int w = ddsHeader.dwWidth; - int h = ddsHeader.dwHeight; - - // load mip-maps - for(int i = 0; i < (int) ddsHeader.dwMipMapCount; ++i) { - if (w == 0) w = 1; - if (h == 0) h = 1; - - size = ((w+3)/4) * ((h+3)/4) * blockSize; - qt_glCompressedTexImage2DARB(GL_TEXTURE_2D, i, format, w, h, 0, - size, pixels + offset); - offset += size; - - // half size for each mip-map level - w = w/2; - h = h/2; - } - - free(pixels); - - qgl_dds_cache()->insert(fileName, tx_id); - return tx_id; + + dds_cache->insert(fileName, texture.id); + return texture.id; } static inline QRgb qt_gl_convertToGLFormatHelper(QRgb src_pixel, GLenum texture_format) @@ -2137,13 +2056,36 @@ Q_ASSERT(texture); if (texture->id > 0) - const_cast(image).data_ptr()->is_cached = true; + QImagePixmapCleanupHooks::enableCleanupHooks(image); return texture; } // #define QGL_BIND_TEXTURE_DEBUG +// map from Qt's ARGB endianness-dependent format to GL's big-endian RGBA layout +static inline void qgl_byteSwapImage(QImage &img, GLenum pixel_type) +{ + const int width = img.width(); + const int height = img.height(); + + if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV + || (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian)) + { + for (int i = 0; i < height; ++i) { + uint *p = (uint *) img.scanLine(i); + for (int x = 0; x < width; ++x) + p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00); + } + } else { + for (int i = 0; i < height; ++i) { + uint *p = (uint *) img.scanLine(i); + for (int x = 0; x < width; ++x) + p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff); + } + } +} + QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint internalFormat, const qint64 key, QGLContext::BindOptions options) { @@ -2156,6 +2098,11 @@ time.start(); #endif +#ifndef QT_NO_DEBUG + // Reset the gl error stack...git + while (glGetError() != GL_NO_ERROR) ; +#endif + // Scale the pixmap if needed. GL textures needs to have the // dimensions 2^n+2(border) x 2^m+2(border), unless we're using GL // 2.0 or use the GL_TEXTURE_RECTANGLE texture target @@ -2163,8 +2110,8 @@ int tx_h = qt_next_power_of_two(image.height()); QImage img = image; - if (( !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0) && - !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0) ) + if (!(QGLExtensions::glExtensions & QGLExtensions::NPOTTextures) + && !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0) && (target == GL_TEXTURE_2D && (tx_w != image.width() || tx_h != image.height()))) { img = img.scaled(tx_w, tx_h); @@ -2185,9 +2132,9 @@ bool genMipmap = false; #endif if (glFormat.directRendering() - && QGLExtensions::glExtensions & QGLExtensions::GenerateMipmap + && (QGLExtensions::glExtensions & QGLExtensions::GenerateMipmap) && target == GL_TEXTURE_2D - && options & QGLContext::MipmapBindOption) + && (options & QGLContext::MipmapBindOption)) { #ifdef QGL_BIND_TEXTURE_DEBUG printf(" - generating mipmaps (%d ms)\n", time.elapsed()); @@ -2213,7 +2160,7 @@ bool premul = options & QGLContext::PremultipliedAlphaBindOption; GLenum externalFormat; GLuint pixel_type; - if (QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_2) { + if (QGLExtensions::glExtensions & QGLExtensions::BGRATextureFormat) { externalFormat = GL_BGRA; pixel_type = GL_UNSIGNED_INT_8_8_8_8_REV; } else { @@ -2265,13 +2212,21 @@ #ifdef QGL_BIND_TEXTURE_DEBUG printf(" - flipping bits over y (%d ms)\n", time.elapsed()); #endif - int ipl = img.bytesPerLine() / 4; - int h = img.height(); - for (int y=0; y> 16) & 0xff) | (p[x] & 0xff00ff00); - } - } else { - for (int i=0; i < height; ++i) { - uint *p = (uint *) img.scanLine(i); - for (int x=0; x> 24) & 0xff); - } - } + qgl_byteSwapImage(img, pixel_type); } +#ifdef QT_OPENGL_ES + // OpenGL/ES requires that the internal and external formats be identical. + // This is typically used to convert GL_RGBA into GL_BGRA. + // Also, we need to use GL_UNSIGNED_BYTE when the format is GL_BGRA. + internalFormat = externalFormat; + if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV) + pixel_type = GL_UNSIGNED_BYTE; +#endif #ifdef QGL_BIND_TEXTURE_DEBUG printf(" - uploading, image.format=%d, externalFormat=0x%x, internalFormat=0x%x, pixel_type=0x%x\n", img.format(), externalFormat, internalFormat, pixel_type); @@ -2391,7 +2338,7 @@ Q_ASSERT(texture); if (texture->id > 0) - const_cast(pixmap).data_ptr()->is_cached = true; + QImagePixmapCleanupHooks::enableCleanupHooks(pixmap); return texture; } @@ -2440,6 +2387,9 @@ */ GLuint QGLContext::bindTexture(const QImage &image, GLenum target, GLint format) { + if (image.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(image, target, format, false, DefaultBindOption); return texture->id; @@ -2472,6 +2422,9 @@ */ GLuint QGLContext::bindTexture(const QImage &image, GLenum target, GLint format, BindOptions options) { + if (image.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(image, target, format, false, options); return texture->id; @@ -2481,6 +2434,9 @@ /*! \internal */ GLuint QGLContext::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format) { + if (image.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(image, GLenum(target), GLint(format), false, DefaultBindOption); return texture->id; @@ -2490,6 +2446,9 @@ GLuint QGLContext::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format, BindOptions options) { + if (image.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(image, GLenum(target), GLint(format), false, options); return texture->id; @@ -2502,6 +2461,9 @@ */ GLuint QGLContext::bindTexture(const QPixmap &pixmap, GLenum target, GLint format) { + if (pixmap.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(pixmap, target, format, DefaultBindOption); return texture->id; @@ -2516,6 +2478,9 @@ */ GLuint QGLContext::bindTexture(const QPixmap &pixmap, GLenum target, GLint format, BindOptions options) { + if (pixmap.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(pixmap, target, format, options); return texture->id; @@ -2525,6 +2490,9 @@ /*! \internal */ GLuint QGLContext::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format) { + if (pixmap.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(pixmap, GLenum(target), GLint(format), DefaultBindOption); return texture->id; @@ -2533,6 +2501,9 @@ GLuint QGLContext::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, QMacCompatGLint format, BindOptions options) { + if (pixmap.isNull()) + return 0; + Q_D(QGLContext); QGLTexture *texture = d->bindTexture(pixmap, GLenum(target), GLint(format), options); return texture->id; @@ -2548,17 +2519,20 @@ */ void QGLContext::deleteTexture(GLuint id) { + Q_D(QGLContext); + if (QGLTextureCache::instance()->remove(this, id)) return; // check the DDS cache if the texture wasn't found in the pixmap/image // cache - QList ddsKeys = qgl_dds_cache()->keys(); + QGLDDSCache *dds_cache = &(d->group->m_dds_cache); + QList ddsKeys = dds_cache->keys(); for (int i = 0; i < ddsKeys.size(); ++i) { - GLuint texture = qgl_dds_cache()->value(ddsKeys.at(i)); + GLuint texture = dds_cache->value(ddsKeys.at(i)); if (id == texture) { glDeleteTextures(1, &texture); - qgl_dds_cache()->remove(ddsKeys.at(i)); + dds_cache->remove(ddsKeys.at(i)); return; } } @@ -2999,7 +2973,7 @@ bool QGLContext::isSharing() const { Q_D(const QGLContext); - return d->sharing; + return d->group->isSharing(); } QGLFormat QGLContext::format() const @@ -3836,6 +3810,11 @@ } #if defined(QT_OPENGL_ES) + // A re-parent is likely to destroy the X11 window and re-create it. It is important + // that we free the EGL surface _before_ the winID changes - otherwise we can leak. + if (e->type() == QEvent::ParentAboutToChange) + d->glcx->d_func()->destroyEglSurfaceForDevice(); + if ((e->type() == QEvent::ParentChange) || (e->type() == QEvent::WindowStateChange)) { // The window may have been re-created during re-parent or state change - if so, the EGL // surface will need to be re-created. @@ -4047,7 +4026,7 @@ glReadPixels(0, 0, w, h, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, res.bits()); const QVector pal = QColormap::instance().colormap(); if (pal.size()) { - res.setNumColors(pal.size()); + res.setColorCount(pal.size()); for (int i = 0; i < pal.size(); i++) res.setColor(i, pal.at(i).rgb()); } @@ -4126,7 +4105,7 @@ const QGLContext *ctx = QGLContext::currentContext(); if (ctx) { if (ctx->format().rgba()) - glColor4ub(c.red(), c.green(), c.blue(), c.alpha()); + glColor4f(c.redF(), c.greenF(), c.blueF(), c.alphaF()); else if (!d->cmap.isEmpty()) { // QGLColormap in use? int i = d->cmap.find(c.rgb()); if (i < 0) @@ -4323,6 +4302,7 @@ glDisable(GL_CULL_FACE); glDisable(GL_LIGHTING); glDisable(GL_STENCIL_TEST); + glDisable(GL_DEPTH_TEST); glEnable(GL_BLEND); glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); } @@ -4376,6 +4356,10 @@ \note This function clears the stencil buffer. \note This function is not supported on OpenGL/ES systems. + + \note This function temporarily disables depth-testing when the + text is drawn. + \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead. */ @@ -4466,6 +4450,13 @@ have the labels move with the model as it is rotated etc. \note This function is not supported on OpenGL/ES systems. + + \note If depth testing is enabled before this function is called, + then the drawn text will be depth-tested against the models that + have already been drawn in the scene. Use \c{glDisable(GL_DEPTH_TEST)} + before calling this function to annotate the models without + depth-testing the text. + \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead. */ void QGLWidget::renderText(double x, double y, double z, const QString &str, const QFont &font, int) @@ -4590,6 +4581,9 @@ */ GLuint QGLWidget::bindTexture(const QImage &image, GLenum target, GLint format) { + if (image.isNull()) + return 0; + Q_D(QGLWidget); return d->glcx->bindTexture(image, target, format, QGLContext::DefaultBindOption); } @@ -4603,6 +4597,9 @@ */ GLuint QGLWidget::bindTexture(const QImage &image, GLenum target, GLint format, QGLContext::BindOptions options) { + if (image.isNull()) + return 0; + Q_D(QGLWidget); return d->glcx->bindTexture(image, target, format, options); } @@ -4612,6 +4609,9 @@ /*! \internal */ GLuint QGLWidget::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format) { + if (image.isNull()) + return 0; + Q_D(QGLWidget); return d->glcx->bindTexture(image, GLenum(target), GLint(format), QGLContext::DefaultBindOption); } @@ -4619,6 +4619,9 @@ GLuint QGLWidget::bindTexture(const QImage &image, QMacCompatGLenum target, QMacCompatGLint format, QGLContext::BindOptions options) { + if (image.isNull()) + return 0; + Q_D(QGLWidget); return d->glcx->bindTexture(image, GLenum(target), GLint(format), options); } @@ -4632,6 +4635,9 @@ */ GLuint QGLWidget::bindTexture(const QPixmap &pixmap, GLenum target, GLint format) { + if (pixmap.isNull()) + return 0; + Q_D(QGLWidget); return d->glcx->bindTexture(pixmap, target, format, QGLContext::DefaultBindOption); } @@ -4840,58 +4846,67 @@ void QGLExtensions::init_extensions() { - QString extensions = QLatin1String(reinterpret_cast(glGetString(GL_EXTENSIONS))); - if (extensions.contains(QLatin1String("texture_rectangle"))) + QGLExtensionMatcher extensions(reinterpret_cast(glGetString(GL_EXTENSIONS))); + + if (extensions.match("GL_ARB_texture_rectangle")) glExtensions |= TextureRectangle; - if (extensions.contains(QLatin1String("multisample"))) + if (extensions.match("GL_ARB_multisample")) glExtensions |= SampleBuffers; - if (extensions.contains(QLatin1String("generate_mipmap"))) + if (extensions.match("GL_SGIS_generate_mipmap")) glExtensions |= GenerateMipmap; - if (extensions.contains(QLatin1String("texture_compression_s3tc"))) + if (extensions.match("GL_ARB_texture_compression")) glExtensions |= TextureCompression; - if (extensions.contains(QLatin1String("ARB_fragment_program"))) + if (extensions.match("GL_EXT_texture_compression_s3tc")) + glExtensions |= DDSTextureCompression; + if (extensions.match("GL_OES_compressed_ETC1_RGB8_texture")) + glExtensions |= ETC1TextureCompression; + if (extensions.match("GL_IMG_texture_compression_pvrtc")) + glExtensions |= PVRTCTextureCompression; + if (extensions.match("GL_ARB_fragment_program")) glExtensions |= FragmentProgram; - if (extensions.contains(QLatin1String("mirrored_repeat"))) + if (extensions.match("GL_ARB_fragment_shader")) + glExtensions |= FragmentShader; + if (extensions.match("GL_ARB_texture_mirrored_repeat")) glExtensions |= MirroredRepeat; - if (extensions.contains(QLatin1String("EXT_framebuffer_object"))) + if (extensions.match("GL_EXT_framebuffer_object")) glExtensions |= FramebufferObject; - if (extensions.contains(QLatin1String("EXT_stencil_two_side"))) + if (extensions.match("GL_EXT_stencil_two_side")) glExtensions |= StencilTwoSide; - if (extensions.contains(QLatin1String("EXT_stencil_wrap"))) + if (extensions.match("GL_EXT_stencil_wrap")) glExtensions |= StencilWrap; - if (extensions.contains(QLatin1String("EXT_packed_depth_stencil"))) + if (extensions.match("GL_EXT_packed_depth_stencil")) glExtensions |= PackedDepthStencil; - if (extensions.contains(QLatin1String("GL_NV_float_buffer"))) + if (extensions.match("GL_NV_float_buffer")) glExtensions |= NVFloatBuffer; - if (extensions.contains(QLatin1String("ARB_pixel_buffer_object"))) + if (extensions.match("GL_ARB_pixel_buffer_object")) glExtensions |= PixelBufferObject; #if defined(QT_OPENGL_ES_2) glExtensions |= FramebufferObject; glExtensions |= GenerateMipmap; + glExtensions |= FragmentShader; #endif #if defined(QT_OPENGL_ES_1) || defined(QT_OPENGL_ES_1_CL) - if (extensions.contains(QLatin1String("OES_framebuffer_object"))) + if (extensions.match("GL_OES_framebuffer_object")) glExtensions |= FramebufferObject; #endif #if defined(QT_OPENGL_ES) - if (extensions.contains(QLatin1String("OES_packed_depth_stencil"))) + if (extensions.match("GL_OES_packed_depth_stencil")) glExtensions |= PackedDepthStencil; #endif - if (extensions.contains(QLatin1String("ARB_framebuffer_object"))) { + if (extensions.match("GL_ARB_framebuffer_object")) { // ARB_framebuffer_object also includes EXT_framebuffer_blit. glExtensions |= FramebufferObject; glExtensions |= FramebufferBlit; } - if (extensions.contains(QLatin1String("EXT_framebuffer_blit"))) + + if (extensions.match("GL_EXT_framebuffer_blit")) glExtensions |= FramebufferBlit; - if (extensions.contains(QLatin1String("GL_ARB_texture_non_power_of_two"))) + if (extensions.match("GL_ARB_texture_non_power_of_two")) glExtensions |= NPOTTextures; - QGLContext cx(QGLFormat::defaultFormat()); - if (glExtensions & TextureCompression) { - qt_glCompressedTexImage2DARB = (pfn_glCompressedTexImage2DARB) cx.getProcAddress(QLatin1String("glCompressedTexImage2DARB")); - } + if (extensions.match("GL_EXT_bgra")) + glExtensions |= BGRATextureFormat; } /* @@ -5047,4 +5062,341 @@ } } +QSize QGLTexture::bindCompressedTexture + (const QString& fileName, const char *format) +{ + QFile file(fileName); + if (!file.open(QIODevice::ReadOnly)) + return QSize(); + QByteArray contents = file.readAll(); + file.close(); + return bindCompressedTexture + (contents.constData(), contents.size(), format); +} + +// PVR header format for container files that store textures compressed +// with the ETC1, PVRTC2, and PVRTC4 encodings. Format information from the +// PowerVR SDK at http://www.imgtec.com/powervr/insider/powervr-sdk.asp +// "PVRTexTool Reference Manual, version 1.11f". +struct PvrHeader +{ + quint32 headerSize; + quint32 height; + quint32 width; + quint32 mipMapCount; + quint32 flags; + quint32 dataSize; + quint32 bitsPerPixel; + quint32 redMask; + quint32 greenMask; + quint32 blueMask; + quint32 alphaMask; + quint32 magic; + quint32 surfaceCount; +}; + +#define PVR_MAGIC 0x21525650 // "PVR!" in little-endian + +#define PVR_FORMAT_MASK 0x000000FF +#define PVR_FORMAT_PVRTC2 0x00000018 +#define PVR_FORMAT_PVRTC4 0x00000019 +#define PVR_FORMAT_ETC1 0x00000036 + +#define PVR_HAS_MIPMAPS 0x00000100 +#define PVR_TWIDDLED 0x00000200 +#define PVR_NORMAL_MAP 0x00000400 +#define PVR_BORDER_ADDED 0x00000800 +#define PVR_CUBE_MAP 0x00001000 +#define PVR_FALSE_COLOR_MIPMAPS 0x00002000 +#define PVR_VOLUME_TEXTURE 0x00004000 +#define PVR_ALPHA_IN_TEXTURE 0x00008000 +#define PVR_VERTICAL_FLIP 0x00010000 + +#ifndef GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG +#define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG 0x8C00 +#define GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG 0x8C01 +#define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG 0x8C02 +#define GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG 0x8C03 +#endif + +#ifndef GL_ETC1_RGB8_OES +#define GL_ETC1_RGB8_OES 0x8D64 +#endif + +bool QGLTexture::canBindCompressedTexture + (const char *buf, int len, const char *format, bool *hasAlpha) +{ + if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) { + // Compressed texture loading only supported on little-endian + // systems such as x86 and ARM at the moment. + return false; + } + if (!format) { + // Auto-detect the format from the header. + if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) { + *hasAlpha = true; + return true; + } else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) { + const PvrHeader *pvrHeader = + reinterpret_cast(buf); + *hasAlpha = (pvrHeader->alphaMask != 0); + return true; + } + } else { + // Validate the format against the header. + if (!qstricmp(format, "DDS")) { + if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) { + *hasAlpha = true; + return true; + } + } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) { + if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) { + const PvrHeader *pvrHeader = + reinterpret_cast(buf); + *hasAlpha = (pvrHeader->alphaMask != 0); + return true; + } + } + } + return false; +} + +#define ctx QGLContext::currentContext() + +QSize QGLTexture::bindCompressedTexture + (const char *buf, int len, const char *format) +{ + if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) { + // Compressed texture loading only supported on little-endian + // systems such as x86 and ARM at the moment. + return QSize(); + } +#if !defined(QT_OPENGL_ES) + if (!glCompressedTexImage2D) { + if (!(QGLExtensions::glExtensions & QGLExtensions::TextureCompression)) { + qWarning("QGLContext::bindTexture(): The GL implementation does " + "not support texture compression extensions."); + return QSize(); + } + glCompressedTexImage2D = (_glCompressedTexImage2DARB) ctx->getProcAddress(QLatin1String("glCompressedTexImage2DARB")); + if (!glCompressedTexImage2D) { + qWarning("QGLContext::bindTexture(): could not resolve " + "glCompressedTexImage2DARB."); + return QSize(); + } + } +#endif + if (!format) { + // Auto-detect the format from the header. + if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) + return bindCompressedTextureDDS(buf, len); + else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) + return bindCompressedTexturePVR(buf, len); + } else { + // Validate the format against the header. + if (!qstricmp(format, "DDS")) { + if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) + return bindCompressedTextureDDS(buf, len); + } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) { + if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) + return bindCompressedTexturePVR(buf, len); + } + } + return QSize(); +} + +QSize QGLTexture::bindCompressedTextureDDS(const char *buf, int len) +{ + // We only support 2D texture loading at present. + if (target != GL_TEXTURE_2D) + return QSize(); + + // Bail out if the necessary extension is not present. + if (!(QGLExtensions::glExtensions & QGLExtensions::DDSTextureCompression)) { + qWarning("QGLContext::bindTexture(): DDS texture compression is not supported."); + return QSize(); + } + + const DDSFormat *ddsHeader = reinterpret_cast(buf + 4); + if (!ddsHeader->dwLinearSize) { + qWarning("QGLContext::bindTexture(): DDS image size is not valid."); + return QSize(); + } + + int blockSize = 16; + GLenum format; + + switch(ddsHeader->ddsPixelFormat.dwFourCC) { + case FOURCC_DXT1: + format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; + blockSize = 8; + break; + case FOURCC_DXT3: + format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; + break; + case FOURCC_DXT5: + format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; + break; + default: + qWarning("QGLContext::bindTexture(): DDS image format not supported."); + return QSize(); + } + + const GLubyte *pixels = + reinterpret_cast(buf + ddsHeader->dwSize + 4); + + glGenTextures(1, &id); + glBindTexture(GL_TEXTURE_2D, id); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + + int size; + int offset = 0; + int available = len - int(ddsHeader->dwSize + 4); + int w = ddsHeader->dwWidth; + int h = ddsHeader->dwHeight; + + // load mip-maps + for(int i = 0; i < (int) ddsHeader->dwMipMapCount; ++i) { + if (w == 0) w = 1; + if (h == 0) h = 1; + + size = ((w+3)/4) * ((h+3)/4) * blockSize; + if (size > available) + break; + glCompressedTexImage2D(GL_TEXTURE_2D, i, format, w, h, 0, + size, pixels + offset); + offset += size; + available -= size; + + // half size for each mip-map level + w = w/2; + h = h/2; + } + + // DDS images are not inverted. + options &= ~QGLContext::InvertedYBindOption; + + return QSize(ddsHeader->dwWidth, ddsHeader->dwHeight); +} + +QSize QGLTexture::bindCompressedTexturePVR(const char *buf, int len) +{ + // We only support 2D texture loading at present. Cube maps later. + if (target != GL_TEXTURE_2D) + return QSize(); + + // Determine which texture format we will be loading. + const PvrHeader *pvrHeader = reinterpret_cast(buf); + GLenum textureFormat; + quint32 minWidth, minHeight; + switch (pvrHeader->flags & PVR_FORMAT_MASK) { + case PVR_FORMAT_PVRTC2: + if (pvrHeader->alphaMask) + textureFormat = GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG; + else + textureFormat = GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG; + minWidth = 16; + minHeight = 8; + break; + + case PVR_FORMAT_PVRTC4: + if (pvrHeader->alphaMask) + textureFormat = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG; + else + textureFormat = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG; + minWidth = 8; + minHeight = 8; + break; + + case PVR_FORMAT_ETC1: + textureFormat = GL_ETC1_RGB8_OES; + minWidth = 4; + minHeight = 4; + break; + + default: + qWarning("QGLContext::bindTexture(): PVR image format 0x%x not supported.", int(pvrHeader->flags & PVR_FORMAT_MASK)); + return QSize(); + } + + // Bail out if the necessary extension is not present. + if (textureFormat == GL_ETC1_RGB8_OES) { + if (!(QGLExtensions::glExtensions & + QGLExtensions::ETC1TextureCompression)) { + qWarning("QGLContext::bindTexture(): ETC1 texture compression is not supported."); + return QSize(); + } + } else { + if (!(QGLExtensions::glExtensions & + QGLExtensions::PVRTCTextureCompression)) { + qWarning("QGLContext::bindTexture(): PVRTC texture compression is not supported."); + return QSize(); + } + } + + // Boundary check on the buffer size. + quint32 bufferSize = pvrHeader->headerSize + pvrHeader->dataSize; + if (bufferSize > quint32(len)) { + qWarning("QGLContext::bindTexture(): PVR image size is not valid."); + return QSize(); + } + + // Create the texture. + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glGenTextures(1, &id); + glBindTexture(GL_TEXTURE_2D, id); + if (pvrHeader->mipMapCount) { + if ((options & QGLContext::LinearFilteringBindOption) != 0) { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); + } else { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST); + } + } else if ((options & QGLContext::LinearFilteringBindOption) != 0) { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + } else { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + } + + // Load the compressed mipmap levels. + const GLubyte *buffer = + reinterpret_cast(buf + pvrHeader->headerSize); + bufferSize = pvrHeader->dataSize; + quint32 level = 0; + quint32 width = pvrHeader->width; + quint32 height = pvrHeader->height; + while (bufferSize > 0 && level < pvrHeader->mipMapCount) { + quint32 size = + (qMax(width, minWidth) * qMax(height, minHeight) * + pvrHeader->bitsPerPixel) / 8; + if (size > bufferSize) + break; + glCompressedTexImage2D(GL_TEXTURE_2D, GLint(level), textureFormat, + GLsizei(width), GLsizei(height), 0, + GLsizei(size), buffer); + width /= 2; + height /= 2; + buffer += size; + ++level; + } + + // Restore the default pixel alignment for later texture uploads. + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); + + // Set the invert flag for the texture. The "vertical flip" + // flag in PVR is the opposite sense to our sense of inversion. + if ((pvrHeader->flags & PVR_VERTICAL_FLIP) != 0) + options &= ~QGLContext::InvertedYBindOption; + else + options |= QGLContext::InvertedYBindOption; + + return QSize(pvrHeader->width, pvrHeader->height); +} + +#undef ctx + QT_END_NAMESPACE