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Diffstat (limited to 'src/threed/textures/qgltextureutils.cpp')
| -rw-r--r-- | src/threed/textures/qgltextureutils.cpp | 785 |
1 files changed, 0 insertions, 785 deletions
diff --git a/src/threed/textures/qgltextureutils.cpp b/src/threed/textures/qgltextureutils.cpp deleted file mode 100644 index acdf7a9d..00000000 --- a/src/threed/textures/qgltextureutils.cpp +++ /dev/null @@ -1,785 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtQuick3D module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qgltextureutils_p.h" -#include "qglext_p.h" -#include <QtCore/qfile.h> - -QT_BEGIN_NAMESPACE - -QGL::TextureWrap qt_gl_modify_texture_wrap(QGL::TextureWrap value) -{ - switch (value) { -#if defined(QT_OPENGL_ES) - case QGL::Clamp: - value = QGL::ClampToEdge; - break; -#endif -#if !defined(QT_OPENGL_ES) - case QGL::ClampToBorder: - if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_3) - == 0) - value = QGL::Clamp; - break; -#else - case QGL::ClampToBorder: - value = QGL::ClampToEdge; - break; -#endif -#if !defined(QT_OPENGL_ES) - case QGL::ClampToEdge: - if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_2) - == 0) - value = QGL::Clamp; - break; -#endif -#if !defined(QT_OPENGL_ES) - case QGL::MirroredRepeat: - if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_4) - == 0) - value = QGL::Repeat; - break; -#elif !defined(QT_OPENGL_ES_2) - case QGL::MirroredRepeat: - value = QGL::Repeat; - break; -#endif - default: break; - } - return value; -} - -QGLTextureExtensions::QGLTextureExtensions(const QGLContext *ctx) - : npotTextures(false) - , generateMipmap(false) - , bgraTextureFormat(false) - , ddsTextureCompression(false) - , etc1TextureCompression(false) - , pvrtcTextureCompression(false) - , compressedTexImage2D(0) -{ - Q_UNUSED(ctx); - QGLExtensionChecker extensions(reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS))); - if (extensions.match("GL_ARB_texture_non_power_of_two")) - npotTextures = true; - if (extensions.match("GL_SGIS_generate_mipmap")) - generateMipmap = true; - if (extensions.match("GL_EXT_bgra")) - bgraTextureFormat = true; - if (extensions.match("GL_EXT_texture_compression_s3tc")) - ddsTextureCompression = true; - if (extensions.match("GL_OES_compressed_ETC1_RGB8_texture")) - etc1TextureCompression = true; - if (extensions.match("GL_IMG_texture_compression_pvrtc")) - pvrtcTextureCompression = true; -#if defined(QT_OPENGL_ES_2) - npotTextures = true; - generateMipmap = true; -#endif -#if !defined(QT_OPENGL_ES) - if (extensions.match("GL_ARB_texture_compression")) { - compressedTexImage2D = (q_glCompressedTexImage2DARB) - ctx->getProcAddress(QLatin1String("glCompressedTexImage2DARB")); - } -#else - compressedTexImage2D = glCompressedTexImage2D; -#endif -} - -QGLTextureExtensions::~QGLTextureExtensions() -{ -} - -Q_GLOBAL_STATIC(QGLResource<QGLTextureExtensions>, qt_gl_texture_extensions) - -QGLTextureExtensions *QGLTextureExtensions::extensions() -{ - const QGLContext *ctx = QGLContext::currentContext(); - if (!ctx) - return 0; - return qt_gl_texture_extensions()->value(ctx); -} - -static void qt_gl_destroyTextureId(GLuint id) -{ - glDeleteTextures(1, &id); -} - -QGLBoundTexture::QGLBoundTexture() - : m_resource(qt_gl_destroyTextureId) - , m_options(QGLContext::DefaultBindOption) - , m_hasAlpha(false) -{ -} - -QGLBoundTexture::~QGLBoundTexture() -{ -} - -// #define QGL_BIND_TEXTURE_DEBUG - -void QGLBoundTexture::startUpload(const QGLContext *ctx, GLenum target, const QSize &imageSize) -{ - Q_UNUSED(imageSize); - - QGLTextureExtensions *extensions = QGLTextureExtensions::extensions(); - if (!extensions) - return; - -#ifdef QGL_BIND_TEXTURE_DEBUG - printf("QGLBoundTexture::startUpload(), imageSize=(%d,%d), options=%x\n", - imageSize.width(), imageSize.height(), int(m_options)); - time.start(); -#endif - -#ifndef QT_NO_DEBUG - // Reset the gl error stack... - while (glGetError() != GL_NO_ERROR) ; -#endif - - // Create the texture id for the target, which should be one of - // GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP. - GLuint id = m_resource.id(); - if (id) { - glBindTexture(target, 0); // Just in case texture is bound. - m_resource.destroy(); - } - id = 0; - glGenTextures(1, &id); - glBindTexture(target, id); - m_resource.attach(ctx, id); - - GLuint filtering = m_options & QGLContext::LinearFilteringBindOption ? GL_LINEAR : GL_NEAREST; - -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - setting options (%d ms)\n", time.elapsed()); -#endif - q_glTexParameteri(target, GL_TEXTURE_MAG_FILTER, filtering); - - if (QGLContext::currentContext()->format().directRendering() - && extensions->generateMipmap - && (m_options & QGLContext::MipmapBindOption)) - { -#if !defined(QT_OPENGL_ES_2) - glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST); - q_glTexParameteri(target, GL_GENERATE_MIPMAP_SGIS, GL_TRUE); -#else - glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST); -#endif - q_glTexParameteri(target, GL_TEXTURE_MIN_FILTER, - m_options & QGLContext::LinearFilteringBindOption - ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST); - } else { - q_glTexParameteri(target, GL_TEXTURE_MIN_FILTER, filtering); - m_options &= ~QGLContext::MipmapBindOption; - } -} - -// map from Qt's ARGB endianness-dependent format to GL's big-endian RGBA layout -static inline void qt_gl_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); - } - } -} - -// #define QGL_BIND_TEXTURE_DEBUG - -void QGLBoundTexture::uploadFace - (GLenum target, const QImage &image, const QSize &scaleSize, GLenum format) -{ - GLenum internalFormat(format); - - // Resolve the texture-related extensions for the current context. - QGLTextureExtensions *extensions = QGLTextureExtensions::extensions(); - if (!extensions) - return; - - // Adjust the image size for scaling and power of two. - QSize size = (!scaleSize.isEmpty() ? scaleSize : image.size()); - if (!extensions->npotTextures) - size = QGL::nextPowerOfTwo(size); - QImage img(image); - if (size != image.size()) { -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - scaling up to %dx%d (%d ms) \n", size.width(), size.height(), time.elapsed()); -#endif - img = img.scaled(size); - } - m_size = size; - - QImage::Format target_format = img.format(); - bool premul = m_options & QGLContext::PremultipliedAlphaBindOption; - GLenum externalFormat; - GLuint pixel_type; - if (extensions->bgraTextureFormat) { - externalFormat = GL_BGRA; - if (QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_2) - pixel_type = GL_UNSIGNED_INT_8_8_8_8_REV; - else - pixel_type = GL_UNSIGNED_BYTE; - } else { - externalFormat = GL_RGBA; - pixel_type = GL_UNSIGNED_BYTE; - } - - switch (target_format) { - case QImage::Format_ARGB32: - if (premul) { - img = img.convertToFormat(target_format = QImage::Format_ARGB32_Premultiplied); -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - converting ARGB32 -> ARGB32_Premultiplied (%d ms) \n", time.elapsed()); -#endif - } - break; - case QImage::Format_ARGB32_Premultiplied: - if (!premul) { - img = img.convertToFormat(target_format = QImage::Format_ARGB32); -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - converting ARGB32_Premultiplied -> ARGB32 (%d ms)\n", time.elapsed()); -#endif - } - break; - case QImage::Format_RGB16: - pixel_type = GL_UNSIGNED_SHORT_5_6_5; - externalFormat = GL_RGB; - internalFormat = GL_RGB; - break; - case QImage::Format_RGB32: - break; - default: - if (img.hasAlphaChannel()) { - img = img.convertToFormat(premul - ? QImage::Format_ARGB32_Premultiplied - : QImage::Format_ARGB32); -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - converting to 32-bit alpha format (%d ms)\n", time.elapsed()); -#endif - } else { - img = img.convertToFormat(QImage::Format_RGB32); -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - converting to 32-bit (%d ms)\n", time.elapsed()); -#endif - } - } - - if (m_options & QGLContext::InvertedYBindOption) { -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - flipping bits over y (%d ms)\n", time.elapsed()); -#endif - if (img.isDetached()) { - int ipl = img.bytesPerLine() / 4; - int h = img.height(); - for (int y=0; y<h/2; ++y) { - int *a = (int *) img.scanLine(y); - int *b = (int *) img.scanLine(h - y - 1); - for (int x=0; x<ipl; ++x) - qSwap(a[x], b[x]); - } - } else { - // Create a new image and copy across. If we use the - // above in-place code then a full copy of the image is - // made before the lines are swapped, which processes the - // data twice. This version should only do it once. - img = img.mirrored(); - } - } - - if (externalFormat == GL_RGBA) { -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - doing byte swapping (%d ms)\n", time.elapsed()); -#endif - // The only case where we end up with a depth different from - // 32 in the switch above is for the RGB16 case, where we set - // the format to GL_RGB - Q_ASSERT(img.depth() == 32); - qt_gl_byteSwapImage(img, pixel_type); - } -#ifdef QT_OPENGL_ES - // OpenGL/ES requires that the internal and external formats be - // identical. - internalFormat = externalFormat; -#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); -#endif - - const QImage &constRef = img; // to avoid detach in bits()... - glTexImage2D(target, 0, internalFormat, img.width(), img.height(), 0, externalFormat, - pixel_type, constRef.bits()); - - m_hasAlpha = (internalFormat != GL_RGB); -} - -void QGLBoundTexture::createFace - (GLenum target, const QSize &size, GLenum format) -{ - glTexImage2D(target, 0, format, size.width(), - size.height(), 0, format, GL_UNSIGNED_BYTE, 0); - m_hasAlpha = (format != GL_RGB); -} - -void QGLBoundTexture::finishUpload(GLenum target) -{ - Q_UNUSED(target); - -#if defined(QT_OPENGL_ES_2) - // OpenGL/ES 2.0 needs to generate mipmaps after all cubemap faces - // have been uploaded. - if (m_options & QGLContext::MipmapBindOption) { -#ifdef QGL_BIND_TEXTURE_DEBUG - printf(" - generating mipmaps (%d ms)\n", time.elapsed()); -#endif - glGenerateMipmap(target); - } -#endif - -#ifndef QT_NO_DEBUG - GLenum error = glGetError(); - if (error != GL_NO_ERROR) { - qWarning(" - texture upload failed, error code 0x%x, enum: %d (%x)\n", error, target, target); - } -#endif - -#ifdef QGL_BIND_TEXTURE_DEBUG - static int totalUploadTime = 0; - totalUploadTime += time.elapsed(); - printf(" - upload done in (%d ms) time=%d\n", time.elapsed(), totalUploadTime); -#endif -} - -// DDS format structure -struct DDSFormat { - quint32 dwSize; - quint32 dwFlags; - quint32 dwHeight; - quint32 dwWidth; - quint32 dwLinearSize; - quint32 dummy1; - quint32 dwMipMapCount; - quint32 dummy2[11]; - struct { - quint32 dummy3[2]; - quint32 dwFourCC; - quint32 dummy4[5]; - } ddsPixelFormat; -}; - -// compressed texture pixel formats -#define FOURCC_DXT1 0x31545844 -#define FOURCC_DXT2 0x32545844 -#define FOURCC_DXT3 0x33545844 -#define FOURCC_DXT4 0x34545844 -#define FOURCC_DXT5 0x35545844 - -#ifndef GL_COMPRESSED_RGB_S3TC_DXT1_EXT -#define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0 -#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1 -#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2 -#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3 -#endif - -// 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 QGLBoundTexture::canBindCompressedTexture - (const char *buf, int len, const char *format, bool *hasAlpha, - bool *isFlipped) -{ - 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; - *isFlipped = true; - return true; - } else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) { - const PvrHeader *pvrHeader = - reinterpret_cast<const PvrHeader *>(buf); - *hasAlpha = (pvrHeader->alphaMask != 0); - *isFlipped = ((pvrHeader->flags & PVR_VERTICAL_FLIP) != 0); - return true; - } - } else { - // Validate the format against the header. - if (!qstricmp(format, "DDS")) { - if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) { - *hasAlpha = true; - *isFlipped = true; - return true; - } - } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) { - if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) { - const PvrHeader *pvrHeader = - reinterpret_cast<const PvrHeader *>(buf); - *hasAlpha = (pvrHeader->alphaMask != 0); - *isFlipped = ((pvrHeader->flags & PVR_VERTICAL_FLIP) != 0); - return true; - } - } - } - return false; -} - -bool QGLBoundTexture::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 false; - } -#if !defined(QT_OPENGL_ES) - QGLTextureExtensions *extensions = QGLTextureExtensions::extensions(); - if (!extensions) - return false; - if (!extensions->compressedTexImage2D) { - qWarning("QGLContext::bindTexture(): The GL implementation does " - "not support texture compression extensions."); - return false; - } -#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 false; -} - -bool QGLBoundTexture::bindCompressedTexture - (const QString& fileName, const char *format) -{ - QFile file(fileName); - if (!file.open(QIODevice::ReadOnly)) - return false; - QByteArray contents = file.readAll(); - file.close(); - return bindCompressedTexture - (contents.constData(), contents.size(), format); -} - -bool QGLBoundTexture::bindCompressedTextureDDS(const char *buf, int len) -{ - QGLTextureExtensions *extensions = QGLTextureExtensions::extensions(); - if (!extensions) - return false; - - // Bail out if the necessary extension is not present. - if (!extensions->ddsTextureCompression) { - qWarning("QGLBoundTexture::bindCompressedTextureDDS(): DDS texture compression is not supported."); - return false; - } - - const DDSFormat *ddsHeader = reinterpret_cast<const DDSFormat *>(buf + 4); - if (!ddsHeader->dwLinearSize) { - qWarning("QGLBoundTexture::bindCompressedTextureDDS(): DDS image size is not valid."); - return false; - } - - 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("QGLBoundTexture::bindCompressedTextureDDS(): DDS image format not supported."); - return false; - } - - const GLubyte *pixels = - reinterpret_cast<const GLubyte *>(buf + ddsHeader->dwSize + 4); - - GLuint id = m_resource.id(); - if (id) { - glBindTexture(GL_TEXTURE_2D, 0); // Just in case it is bound. - m_resource.destroy(); - } - id = 0; - glGenTextures(1, &id); - glBindTexture(GL_TEXTURE_2D, id); - q_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - q_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - m_resource.attach(QGLContext::currentContext(), id); - - 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; - extensions->compressedTexImage2D - (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. - m_options &= ~QGLContext::InvertedYBindOption; - - m_size = QSize(ddsHeader->dwWidth, ddsHeader->dwHeight); - m_hasAlpha = false; - return true; -} - -bool QGLBoundTexture::bindCompressedTexturePVR(const char *buf, int len) -{ - QGLTextureExtensions *extensions = QGLTextureExtensions::extensions(); - if (!extensions) - return false; - - // Determine which texture format we will be loading. - const PvrHeader *pvrHeader = reinterpret_cast<const PvrHeader *>(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("QGLBoundTexture::bindCompressedTexturePVR(): PVR image format 0x%x not supported.", int(pvrHeader->flags & PVR_FORMAT_MASK)); - return false; - } - - // Bail out if the necessary extension is not present. - if (textureFormat == GL_ETC1_RGB8_OES) { - if (!extensions->etc1TextureCompression) { - qWarning("QGLBoundTexture::bindCompressedTexturePVR(): ETC1 texture compression is not supported."); - return false; - } - } else { - if (!extensions->pvrtcTextureCompression) { - qWarning("QGLBoundTexture::bindCompressedTexturePVR(): PVRTC texture compression is not supported."); - return false; - } - } - - // Boundary check on the buffer size. - quint32 bufferSize = pvrHeader->headerSize + pvrHeader->dataSize; - if (bufferSize > quint32(len)) { - qWarning("QGLBoundTexture::bindCompressedTexturePVR(): PVR image size is not valid."); - return false; - } - - // Create the texture. - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - GLuint id = m_resource.id(); - if (id) { - glBindTexture(GL_TEXTURE_2D, 0); // Just in case it is bound. - m_resource.destroy(); - } - id = 0; - glGenTextures(1, &id); - glBindTexture(GL_TEXTURE_2D, id); - m_resource.attach(QGLContext::currentContext(), id); - if (pvrHeader->mipMapCount) { - if ((m_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 ((m_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<const GLubyte *>(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; - extensions->compressedTexImage2D - (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) - m_options &= ~QGLContext::InvertedYBindOption; - else - m_options |= QGLContext::InvertedYBindOption; - - m_size = QSize(pvrHeader->width, pvrHeader->height); - m_hasAlpha = (pvrHeader->alphaMask != 0); - return true; -} - -QT_END_NAMESPACE |