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* quick hack to hide the cursor in fullscreen

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(TODO: do this after a time out)
* quick hack to display bitmaps containing an
  alpha channel with a checker background
  (TODO: rework filters to be alpha channel
  aware and compose the checker background
  independently of the filter)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15886 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2006-01-09 11:18:01 +00:00
parent c9a5153a00
commit 37a3ed9263
2 changed files with 83 additions and 5 deletions
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84
src/apps/showimage/ShowImageView.cpp
View File

@ -168,6 +168,9 @@ ShowImageView::Pulse()
}
}
}
if (!fHasBorder) {
be_app->ObscureCursor();
}
#if DELAYED_SCALING
if (fBitmap && (fScaleBilinear || fDither) && fScalingCountDown > 0) {
fScalingCountDown --;
@ -188,6 +191,7 @@ ShowImageView::ShowImageView(BRect rect, const char *name, uint32 resizingMode,
InitPatterns();
fDither = false;
fBitmap = NULL;
fDisplayBitmap = NULL;
fSelBitmap = NULL;
fDocumentIndex = 1;
fDocumentCount = 1;
@ -326,6 +330,11 @@ ShowImageView::DeleteBitmap()
{
DeleteScaler();
DeleteSelBitmap();
if (fDisplayBitmap != fBitmap)
delete fDisplayBitmap;
fDisplayBitmap = NULL;
delete fBitmap;
fBitmap = NULL;
}
@ -336,6 +345,61 @@ void ShowImageView::DeleteSelBitmap()
fSelBitmap = NULL;
}
const rgb_color kAlphaLow = (rgb_color){ 0xbb, 0xbb, 0xbb, 0xff };
const rgb_color kAlphaHigh = (rgb_color){ 0xe0, 0xe0, 0xe0, 0xff };
inline void
blend_colors(uint8* d, uint8 r, uint8 g, uint8 b, uint8 a)
{
d[0] = ((b - d[0]) * a + (d[0] << 8)) >> 8;
d[1] = ((g - d[1]) * a + (d[1] << 8)) >> 8;
d[2] = ((r - d[2]) * a + (d[2] << 8)) >> 8;
}
BBitmap*
compose_checker_background(const BBitmap* bitmap)
{
BBitmap* result = new (nothrow) BBitmap(bitmap);
if (result && !result->IsValid()) {
delete result;
result = NULL;
}
if (!result)
return NULL;
uint8* bits = (uint8*)result->Bits();
uint32 bpr = result->BytesPerRow();
uint32 width = result->Bounds().IntegerWidth() + 1;
uint32 height = result->Bounds().IntegerHeight() + 1;
for (uint32 i = 0; i < height; i++) {
uint8* p = bits;
for (uint32 x = 0; x < width; x++) {
uint8 alpha = p[3];
if (alpha < 255) {
p[3] = 255;
alpha = 255 - alpha;
if (x % 10 >= 5) {
if (i % 10 >= 5) {
blend_colors(p, kAlphaLow.red, kAlphaLow.green, kAlphaLow.blue, alpha);
} else {
blend_colors(p, kAlphaHigh.red, kAlphaHigh.green, kAlphaHigh.blue, alpha);
}
} else {
if (i % 10 >= 5) {
blend_colors(p, kAlphaHigh.red, kAlphaHigh.green, kAlphaHigh.blue, alpha);
} else {
blend_colors(p, kAlphaLow.red, kAlphaLow.green, kAlphaLow.blue, alpha);
}
}
}
p += 4;
}
bits += bpr;
}
return result;
}
status_t
ShowImageView::SetImage(const entry_ref *pref)
{
@ -382,9 +446,17 @@ ShowImageView::SetImage(const entry_ref *pref)
fMakesSelection = false;
DeleteBitmap();
fBitmap = newBitmap;
fDisplayBitmap = NULL;
newBitmap = NULL;
fCurrentRef = *pref;
// prepare the display bitmap
if (fBitmap->ColorSpace() == B_RGBA32) {
fDisplayBitmap = compose_checker_background(fBitmap);
}
if (!fDisplayBitmap)
fDisplayBitmap = fBitmap;
// restore orientation
int32 orientation;
fImageOrientation = k0;
@ -517,8 +589,10 @@ ShowImageView::SetBorder(bool hasBorder)
fHasBorder = hasBorder;
if (fHasBorder)
SetLowColor(ui_color(B_PANEL_BACKGROUND_COLOR));
else
else {
SetLowColor(0, 0, 0, 255);
be_app->ObscureCursor();
}
FixupScrollBars();
Invalidate();
}
@ -795,7 +869,7 @@ ShowImageView::GetScaler(BRect rect)
if (fScaler == NULL || !fScaler->Matches(rect, fDither)) {
DeleteScaler();
BMessenger msgr(this, Window());
fScaler = new Scaler(fBitmap, rect, msgr, MSG_INVALIDATE, fDither);
fScaler = new Scaler(fDisplayBitmap, rect, msgr, MSG_INVALIDATE, fDither);
fScaler->Start();
}
return fScaler;
@ -815,13 +889,15 @@ ShowImageView::DrawImage(BRect rect)
#endif
if (scaler != NULL && !scaler->IsRunning()) {
BBitmap* bitmap = scaler->GetBitmap();
if (bitmap) {
DrawBitmap(bitmap, BPoint(rect.left, rect.top));
return;
}
}
}
DrawBitmap(fBitmap, fBitmap->Bounds(), rect);
DrawBitmap(fDisplayBitmap, fDisplayBitmap->Bounds(), rect);
}
void

4
src/apps/showimage/ShowImageView.h
View File

@ -205,7 +205,9 @@ private:
bool fDither; // dither the image
int32 fDocumentIndex; // of the image in the file
int32 fDocumentCount; // number of images in the file
BBitmap *fBitmap; // to be displayed
BBitmap *fBitmap; // the original image
BBitmap *fDisplayBitmap; // the image to be displayed
// (== fBitmap if the bitmap can be displayed as is)
BBitmap *fSelBitmap; // the bitmap in the selection
float fZoom; // factor to be used to display the image
bool fScaleBilinear; // use bilinear scaling?