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Billboard overlays disply grey square while image is loading

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This commit is contained in:
Atlante45 2014-07-11 11:22:06 -07:00
parent a9ceec4627
commit 22bcb7d7e7
1 changed files with 47 additions and 38 deletions
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85
interface/src/ui/overlays/BillboardOverlay.cpp
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@ -20,26 +20,25 @@ BillboardOverlay::BillboardOverlay()
}
void BillboardOverlay::render() {
if (_billboard.isEmpty()) {
return;
}
if (!_billboardTexture) {
QImage image = QImage::fromData(_billboard);
if (image.format() != QImage::Format_ARGB32) {
image = image.convertToFormat(QImage::Format_ARGB32);
if (!_billboard.isEmpty()) {
if (!_billboardTexture) {
QImage image = QImage::fromData(_billboard);
if (image.format() != QImage::Format_ARGB32) {
image = image.convertToFormat(QImage::Format_ARGB32);
}
_size = image.size();
if (_fromImage.x() == -1) {
_fromImage.setRect(0, 0, _size.width(), _size.height());
}
_billboardTexture.reset(new Texture());
glBindTexture(GL_TEXTURE_2D, _billboardTexture->getID());
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _size.width(), _size.height(), 0,
GL_BGRA, GL_UNSIGNED_BYTE, image.constBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
} else {
glBindTexture(GL_TEXTURE_2D, _billboardTexture->getID());
}
_size = image.size();
if (_fromImage.x() == -1) {
_fromImage.setRect(0, 0, _size.width(), _size.height());
}
_billboardTexture.reset(new Texture());
glBindTexture(GL_TEXTURE_2D, _billboardTexture->getID());
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _size.width(), _size.height(), 0,
GL_BGRA, GL_UNSIGNED_BYTE, image.constBits());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
} else {
glBindTexture(GL_TEXTURE_2D, _billboardTexture->getID());
}
glEnable(GL_ALPHA_TEST);
@ -62,25 +61,35 @@ void BillboardOverlay::render() {
}
glScalef(_scale, _scale, _scale);
float maxSize = glm::max(_fromImage.width(), _fromImage.height());
float x = _fromImage.width() / (2.0f * maxSize);
float y = -_fromImage.height() / (2.0f * maxSize);
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_QUADS); {
glTexCoord2f((float)_fromImage.x() / (float)_size.width(),
(float)_fromImage.y() / (float)_size.height());
glVertex2f(-x, -y);
glTexCoord2f(((float)_fromImage.x() + (float)_fromImage.width()) / (float)_size.width(),
(float)_fromImage.y() / (float)_size.height());
glVertex2f(x, -y);
glTexCoord2f(((float)_fromImage.x() + (float)_fromImage.width()) / (float)_size.width(),
((float)_fromImage.y() + (float)_fromImage.height()) / _size.height());
glVertex2f(x, y);
glTexCoord2f((float)_fromImage.x() / (float)_size.width(),
((float)_fromImage.y() + (float)_fromImage.height()) / (float)_size.height());
glVertex2f(-x, y);
} glEnd();
if (_billboardTexture) {
float maxSize = glm::max(_fromImage.width(), _fromImage.height());
float x = _fromImage.width() / (2.0f * maxSize);
float y = -_fromImage.height() / (2.0f * maxSize);
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_QUADS); {
glTexCoord2f((float)_fromImage.x() / (float)_size.width(),
(float)_fromImage.y() / (float)_size.height());
glVertex2f(-x, -y);
glTexCoord2f(((float)_fromImage.x() + (float)_fromImage.width()) / (float)_size.width(),
(float)_fromImage.y() / (float)_size.height());
glVertex2f(x, -y);
glTexCoord2f(((float)_fromImage.x() + (float)_fromImage.width()) / (float)_size.width(),
((float)_fromImage.y() + (float)_fromImage.height()) / _size.height());
glVertex2f(x, y);
glTexCoord2f((float)_fromImage.x() / (float)_size.width(),
((float)_fromImage.y() + (float)_fromImage.height()) / (float)_size.height());
glVertex2f(-x, y);
} glEnd();
} else {
glColor4f(0.5f, 0.5f, 0.5f, 1.0f);
glBegin(GL_QUADS); {
glVertex2f(-1.0f, -1.0f);
glVertex2f(1.0f, -1.0f);
glVertex2f(1.0f, 1.0f);
glVertex2f(-1.0f, 1.0f);
} glEnd();
}
} glPopMatrix();