107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
/*##############################################################################
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## Author: Shaun Reed ##
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## Legal: All Content (c) 2022 Shaun Reed, all rights reserved ##
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## About: Texture class to help with texture and image initializations ##
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## ##
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## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
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##############################################################################*/
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#include <QDebug>
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#include <QImageReader>
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#include <texture.h>
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QImage * Texture::initImage(const char * image, bool flipX, bool flipY)
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{
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// Qt6 limits loaded images to 256MB by default
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QImageReader::setAllocationLimit(512);
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auto loadedImage = new QImage(QImage(image).mirrored(flipX, flipY));
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if (loadedImage->isNull()) {
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qDebug() << "Error loading image: " << image << "\n";
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qDebug() << QImageReader::supportedImageFormats();
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return Q_NULLPTR;
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}
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return loadedImage;
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}
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QOpenGLTexture * Texture::initTexture2D(const char * texture,
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bool flipX, bool flipY)
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{
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QImage * image = initImage(texture, flipX, flipY);
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auto newTexture = new QOpenGLTexture(QOpenGLTexture::Target2D);
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newTexture->setData(*image);
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newTexture->setWrapMode(QOpenGLTexture::Repeat);
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newTexture->setMinMagFilters(QOpenGLTexture::LinearMipMapLinear,
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QOpenGLTexture::Linear);
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delete image;
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return newTexture;
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}
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QOpenGLTexture * Texture::initCubeMap(const char * tile)
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{
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return initCubeMap(QImage(tile), QImage(tile),
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QImage(tile), QImage(tile),
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QImage(tile), QImage(tile));
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}
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QOpenGLTexture * Texture::initCubeMap(
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const char * right, const char * top,
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const char * front, const char * left,
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const char * bottom, const char * back)
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{
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return initCubeMap(QImage(right), QImage(top),
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QImage(front), QImage(left),
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QImage(bottom), QImage(back));
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}
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QOpenGLTexture * Texture::initCubeMap(
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QImage right, QImage top,
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QImage front, QImage left,
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QImage bottom, QImage back)
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{
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auto texture = new QOpenGLTexture(QOpenGLTexture::TargetCubeMap);
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std::vector<QImage> faceTextures = {
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right, top, front,
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left, bottom, back
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};
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// Initialize skybox cubemap texture
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texture->create();
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texture->bind();
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// For each cube map face
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std::vector<QOpenGLTexture::CubeMapFace> faces = {
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QOpenGLTexture::CubeMapPositiveX, QOpenGLTexture::CubeMapPositiveY,
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QOpenGLTexture::CubeMapPositiveZ, QOpenGLTexture::CubeMapNegativeX,
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QOpenGLTexture::CubeMapNegativeY, QOpenGLTexture::CubeMapNegativeZ
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};
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int i = 0;
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for (const auto & face : faces) {
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QImage faceImage(faceTextures[i]);
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if (faceImage.isNull()) {
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qDebug() << "Error loading cube map image\n";
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}
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faceImage = faceImage.convertToFormat(QImage::Format_RGBA8888);
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// On the first iteration, set format and allocate texture storage
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if (face == QOpenGLTexture::CubeMapPositiveX) {
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// This also needs to happen on the first iteration, anyways
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texture->setSize(faceImage.width(), faceImage.height(), faceImage.depth());
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texture->setFormat(QOpenGLTexture::RGBA8_UNorm);
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texture->allocateStorage();
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}
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texture->setData(0, 0, face,
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QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
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faceImage.constBits());
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i++;
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}
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texture->setWrapMode(QOpenGLTexture::ClampToEdge);
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texture->generateMipMaps();
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texture->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
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texture->setMagnificationFilter(QOpenGLTexture::Linear);
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texture->release();
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return texture;
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}
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