oh yes.. :)) i looked that one up.. :))
i tried using it in my callbacks.. then that did not work,
so i tried it in all methods that can be accessed by any
of the callbacks..
it is probably best to see the code.
i have included the Graphics.c file - which should do my
double buffering and freeing of the offscreen window.
cheers.
:))
az.
--
#include <Pilot.h>
#include "Graphics.h"
static CustomPatternType erase = { 0x0000, 0x0000, 0x0000, 0x0000 };
static RectangleType screen = { 0, TITLE_HEIGHT,
PALM_WIDTH, (PALM_HEIGHT - TITLE_HEIGHT) };
static WinHandle scrnBuffer = NULL;
static WinHandle backBuffer = NULL;
void
_Graphics_initialize()
{
Word error;
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
scrnBuffer = WinGetDrawWindow();
backBuffer = WinCreateOffscreenWindow(PALM_WIDTH, PALM_HEIGHT, screenFormat,
&error);
ErrFatalDisplayIf(error, "Cannot create offscreen buffer.");
if (backBuffer != NULL)
WinInitializeWindow(backBuffer);
backBuffer = NULL;
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_terminate()
{
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
WinSetDrawWindow(scrnBuffer);
if (backBuffer != NULL)
WinDeleteWindow(backBuffer, false);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_clearScr()
{
CustomPatternType oldPattern;
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
if (backBuffer != NULL)
WinSetDrawWindow(backBuffer);
WinGetPattern(oldPattern);
WinSetPattern(erase);
WinFillRectangle(&screen, 0);
WinSetPattern(oldPattern);
if (backBuffer != NULL)
WinSetDrawWindow(scrnBuffer);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_drawPoint(int x, int y, int style)
{
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
_Graphics_drawRectangle(x-2, y-2, x+2, y+2, style, 0);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_drawLine(int x1, int y1, int x2, int y2, int style)
{
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
if (backBuffer != NULL)
WinSetDrawWindow(backBuffer);
switch (style)
{
case LIGHT:
WinDrawGrayLine(x1, y1, x2, y2);
break;
case ERASE:
WinEraseLine(x1, y1, x2, y2);
break;
case INVERT:
WinInvertLine(x1, y1, x2, y2);
break;
case NORMAL:
default:
WinDrawLine(x1, y1, x2, y2);
break;
}
if (backBuffer != NULL)
WinSetDrawWindow(scrnBuffer);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_drawRectangle(int x1, int y1, int x2, int y2, int style, int diam)
{
RectangleType rect = { x1, y1, (x2-x1), (y2-y1) };
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
if (backBuffer != NULL)
WinSetDrawWindow(backBuffer);
switch (style)
{
case ERASE:
WinEraseRectangle(&rect, diam);
break;
case INVERT:
WinInvertRectangle(&rect, diam);
break;
case FILL:
WinFillRectangle(&rect, diam);
break;
case NORMAL:
default:
WinDrawRectangle(&rect, diam);
break;
}
if (backBuffer != NULL)
WinSetDrawWindow(scrnBuffer);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_drawString(char *str, int len, int x, int y, int style)
{
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
if (backBuffer != NULL)
WinSetDrawWindow(backBuffer);
switch (style)
{
case ERASE:
WinEraseChars(str, len, x, y);
break;
case INVERT:
WinInvertChars(str, len, x, y);
break;
case NORMAL:
default:
WinDrawChars(str, len, x, y);
break;
}
if (backBuffer != NULL)
WinSetDrawWindow(scrnBuffer);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
void
_Graphics_repaint()
{
#ifdef __GNUC__
FUNCTION_PROLOGUE
#endif
if (backBuffer != NULL)
WinCopyRectangle(backBuffer, scrnBuffer, &screen, 0, TITLE_HEIGHT, scrCopy);
#ifdef __GNUC__
FUNCTION_EPILOGUE
#endif
}
--
az.
--
Aaron Ardiri
Lecturer http://www.hig.se/~ardiri/
University-College i G�vle mailto:[EMAIL PROTECTED]
SE 801 76 G�vle SWEDEN
Tel: +46 26 64 87 38 Fax: +46 26 64 87 88
Mob: +46 70 352 8192 A/H: +46 26 10 16 11
On Wed, 7 Apr 1999, Ray Rodrick wrote:
> Aaron,
> Just a thought - Are you using CALLBACK_PROLOG/EPILOG in your callbacks !
> Regards,
> Ray
>
> Aaron Ardiri wrote:
>
> > hej!
> >
> > my recent experience is that the double buffering techniques
> > do not work in GCC.. i have not got a copy of code warrior
> > (and i am running win98 - so i cannot download the preview)
> > so i dont know if it is gcc, or not.
> >
> > i have scanned the code - but i cannot seem to locate the
> > error.
> >
> > even simply creating an offscreen image, then destroying
> > it (freeing it) causes the palm to crash.
> >
> > you can see the source here:
> >
> > http://www.hig.se/~ardiri/development/palmIII/index.html
> >
> > if anyone can check this code out? (maybe compile it on
> > code warrior?) it would be greatly appreciated.
> >
> > i need to know if i need to change development tools.
> > (although i hate windows and crappy user interfaces).
> > gcc and make are perfect for what i want, and it also
> > means i can compile on linux, win95 and solaris (without
> > any hassles).
> >
> > cheers.
> >
> > az.
> > --
> > Aaron Ardiri
> > Lecturer http://www.hig.se/~ardiri/
> > University-College i G�vle mailto:[EMAIL PROTECTED]
> > SE 801 76 G�vle SWEDEN
> > Tel: +46 26 64 87 38 Fax: +46 26 64 87 88
> > Mob: +46 70 352 8192 A/H: +46 26 10 16 11
> >
> > On Wed, 7 Apr 1999, Ray Rodrick wrote:
> >
> > > Hi,
> > >
> > > I would like to know as well - I am happy with GCC (W95) but see many
> > > complaints and problems posted about CodeWarrior.
> > >
> > > I have a copy of V4 and have just received my V5 free update, but since
> > > there seems to be many outstanding issues, many of which it seems are
> > > not going to be fixed until V6, I have not bothered to use it. I feel
> > > reluctant to part with more money to get fixes when I am happy with GCC.
> > >
> > > Anyone like to comment ?
> > >
> > > Regards,
> > > Ray
> > >
> > > george williams wrote:
> > >
> > > > Perhaps a question for hardcore developers:
> > > >
> > > > I've been using gcc with a minimal emacs dev
> > > > environment and it works fine. Are there
> > > > any great reasons to move to a prettier dev
> > > > solution like MetroWorks?
> > > >
> > > > gw.
> > >
> > >
> > >
>
>
>
