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Implemented changes necessary for single buffered mode, it is turned off for now, because the soft cursor is currently not being taken care of. We will still use double buffering if the screen color space is not 32 bits, too.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12449 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2005-04-20 09:27:15 +00:00
parent 807ba996da
commit ded5874ea2
8 changed files with 185 additions and 64 deletions
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src/servers/app/drawing/ViewHWInterface.cpp
+44 -19
View File
@@ -403,31 +403,46 @@ ViewHWInterface::SetMode(const display_mode &mode)
// NOTE: backbuffer is always B_RGBA32, this simplifies the
// drawing backend implementation tremendously for the time
// being. The color space conversion is handled in CopyBackToFront()
BBitmap* backBitmap = new BBitmap(frame, 0, B_RGBA32);
BBitmap* frontBitmap = new BBitmap(frame, 0, (color_space)fDisplayMode.space);
fBackBuffer = new BitmapBuffer(backBitmap);
// TODO: Above not true anymore for single buffered mode!!!
// -> fall back to double buffer for fDisplayMode.space != B_RGB32
// as intermediate solution...
bool doubleBuffered = HWInterface::IsDoubleBuffered();
if ((color_space)fDisplayMode.space != B_RGB32 &&
(color_space)fDisplayMode.space != B_RGBA32)
doubleBuffered = true;
BBitmap* frontBitmap = new BBitmap(frame, 0, (color_space)fDisplayMode.space);
fFrontBuffer = new BitmapBuffer(frontBitmap);
status_t err = fBackBuffer->InitCheck();
if (err < B_OK) {
delete fBackBuffer;
fBackBuffer = NULL;
ret = err;
}
err = fFrontBuffer->InitCheck();
status_t err = fFrontBuffer->InitCheck();
if (err < B_OK) {
delete fFrontBuffer;
fFrontBuffer = NULL;
ret = err;
}
if (err >= B_OK && doubleBuffered) {
// backbuffer is always B_RGBA32
// since we override IsDoubleBuffered(), the drawing buffer
// is in effect also always B_RGBA32.
BBitmap* backBitmap = new BBitmap(frame, 0, B_RGBA32);
fBackBuffer = new BitmapBuffer(backBitmap);
err = fBackBuffer->InitCheck();
if (err < B_OK) {
delete fBackBuffer;
fBackBuffer = NULL;
ret = err;
}
}
if (ret >= B_OK) {
// clear out buffers, alpha is 255 this way
// TODO: maybe this should handle different color spaces in different ways
memset(backBitmap->Bits(), 255, backBitmap->BitsLength());
memset(frontBitmap->Bits(), 255, frontBitmap->BitsLength());
if (fBackBuffer)
memset(fBackBuffer->Bits(), 255, fBackBuffer->BitsLength());
memset(fFrontBuffer->Bits(), 255, fFrontBuffer->BitsLength());
// change the window size and update the bitmap used for drawing
fWindow->ResizeTo(frame.Width(), frame.Height());
@@ -600,13 +615,23 @@ ViewHWInterface::BackBuffer() const
return fBackBuffer;
}
// CopyBackToFront
status_t
ViewHWInterface::CopyBackToFront(const BRect& frame)
// IsDoubleBuffered
bool
ViewHWInterface::IsDoubleBuffered() const
{
status_t ret = HWInterface::CopyBackToFront(frame);
// TODO: investigate why this function is called before SetMode() was called!
if (fWindow)
if (fFrontBuffer)
return fBackBuffer != NULL;
return HWInterface::IsDoubleBuffered();
}
// Invalidate
status_t
ViewHWInterface::Invalidate(const BRect& frame)
{
status_t ret = HWInterface::Invalidate(frame);
if (ret >= B_OK && fWindow)
fWindow->Invalidate(frame);
return ret;
}