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Support sub-image updating in Ui::GL::Image.

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This commit is contained in:
John Preston 2021-06-03 11:07:21 +04:00
parent 8b7aa44226
commit 0df1579d4a
2 changed files with 40 additions and 18 deletions
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52
ui/gl/gl_image.cpp
View file

@ -63,30 +63,52 @@ void Image::invalidate() {
_storage = base::take(_image);
}
void Image::bind(QOpenGLFunctions &f) {
void Image::bind(QOpenGLFunctions &f, QSize subimage) {
Expects(!_image.isNull());
Expects(subimage.width() <= _image.width()
&& subimage.height() <= _image.height());
_textures.ensureCreated(f);
if (subimage.isNull()) {
subimage = _image.size();
}
if (subimage.isEmpty()) {
_textureSize = subimage;
return;
}
const auto cacheKey = _image.cacheKey();
const auto upload = (_cacheKey != cacheKey);
if (upload) {
_cacheKey = cacheKey;
_index = 1 - _index;
}
_textures.bind(f, _index);
const auto error = f.glGetError();
_textures.bind(f, 0);
if (upload) {
f.glPixelStorei(GL_UNPACK_ROW_LENGTH, _image.bytesPerLine() / 4);
f.glTexImage2D(
GL_TEXTURE_2D,
0,
GL_RGBA,
_image.width(),
_image.height(),
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
_image.constBits());
if (_textureSize.width() < subimage.width()
|| _textureSize.height() < subimage.height()) {
_textureSize = subimage;
f.glTexImage2D(
GL_TEXTURE_2D,
0,
GL_RGBA,
subimage.width(),
subimage.height(),
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
_image.constBits());
} else {
f.glTexSubImage2D(
GL_TEXTURE_2D,
0,
0,
0,
subimage.width(),
subimage.height(),
GL_RGBA,
GL_UNSIGNED_BYTE,
_image.constBits());
}
f.glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
}
@ -112,7 +134,7 @@ TexturedRect Image::texturedRect(
texture.y() + (visible.y() - geometry.y()) * yFactor,
visible.width() * xFactor,
visible.height() * yFactor);
const auto dimensions = QSizeF(_image.size());
const auto dimensions = QSizeF(_textureSize);
return {
.geometry = Rect(visible),
.texture = Rect(QRectF(

6
ui/gl/gl_image.h
View file

@ -101,7 +101,7 @@ public:
[[nodiscard]] QImage takeImage();
void invalidate();
void bind(QOpenGLFunctions &f);
void bind(QOpenGLFunctions &f, QSize subimage = QSize());
void destroy(QOpenGLFunctions &f);
[[nodiscard]] TexturedRect texturedRect(
@ -116,9 +116,9 @@ public:
private:
QImage _image;
QImage _storage;
Textures<2> _textures;
Textures<1> _textures;
qint64 _cacheKey = 0;
int _index = 0;
QSize _textureSize;
};