diff options
Diffstat (limited to 'src/gui/opengl/qopenglframebufferobject.cpp')
-rw-r--r-- | src/gui/opengl/qopenglframebufferobject.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/gui/opengl/qopenglframebufferobject.cpp b/src/gui/opengl/qopenglframebufferobject.cpp index df0e635673..bb723b7ce6 100644 --- a/src/gui/opengl/qopenglframebufferobject.cpp +++ b/src/gui/opengl/qopenglframebufferobject.cpp @@ -412,8 +412,18 @@ void QOpenGLFramebufferObjectPrivate::init(QOpenGLFramebufferObject *, const QSi glBindTexture(target, texture); glTexImage2D(target, 0, internal_format, size.width(), size.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); - if (mipmap) - funcs.glGenerateMipmap(GL_TEXTURE_2D); + if (mipmap) { + int width = size.width(); + int height = size.height(); + int level = 0; + while (width > 1 || height > 1) { + width = (width + 1) >> 1; + height = (height + 1) >> 1; + ++level; + glTexImage2D(target, level, internal_format, width, height, 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + } + } glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |