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/** \file
* \brief Windows GDI+ Double Buffer
*
* See Copyright Notice in cd.h
*/
#include "cdwinp.h"
#include "cddbuf.h"
#include <stdlib.h>
#include <stdio.h>
static void cdkillcanvas(cdCtxCanvas* ctxcanvas)
{
cdwpKillCanvas(ctxcanvas);
if (ctxcanvas->bitmap_dbuffer) delete ctxcanvas->bitmap_dbuffer;
delete ctxcanvas->bitmap;
delete ctxcanvas;
}
static void cddeactivate(cdCtxCanvas* ctxcanvas)
{
cdCanvas* canvas_dbuffer = ctxcanvas->canvas_dbuffer;
/* this is done in the canvas_dbuffer context */
cdCanvasDeactivate(canvas_dbuffer);
}
static void cdflush(cdCtxCanvas* ctxcanvas)
{
cdCanvas* canvas_dbuffer = ctxcanvas->canvas_dbuffer;
if (ctxcanvas->dirty || ctxcanvas->bitmap_dbuffer == NULL)
{
ctxcanvas->dirty = 0;
if (ctxcanvas->bitmap_dbuffer) delete ctxcanvas->bitmap_dbuffer;
ctxcanvas->bitmap_dbuffer = new CachedBitmap(ctxcanvas->bitmap, canvas_dbuffer->ctxcanvas->graphics);
}
ctxcanvas->graphics->Flush(FlushIntentionSync);
/* this is done in the canvas_dbuffer context */
/* Flush can be affected by Origin and Clipping, but not WriteMode */
canvas_dbuffer->ctxcanvas->graphics->ResetTransform();
int x = 0, y = 0;
if (canvas_dbuffer->use_origin)
{
x += canvas_dbuffer->origin.x;
if (canvas_dbuffer->invert_yaxis)
y -= canvas_dbuffer->origin.y; // top down shift
else
y += canvas_dbuffer->origin.y;
}
int old_writemode = cdCanvasWriteMode(canvas_dbuffer, CD_REPLACE);
canvas_dbuffer->ctxcanvas->graphics->DrawCachedBitmap(ctxcanvas->bitmap_dbuffer, x, y);
canvas_dbuffer->ctxcanvas->graphics->Flush(FlushIntentionSync);
cdCanvasWriteMode(canvas_dbuffer, old_writemode);
}
static int cdactivate(cdCtxCanvas* ctxcanvas)
{
int w, h;
cdCanvas* canvas_dbuffer = ctxcanvas->canvas_dbuffer;
/* this is done in the canvas_dbuffer context */
/* this will update canvas size */
cdCanvasActivate(canvas_dbuffer);
w = canvas_dbuffer->w;
h = canvas_dbuffer->h;
if (w==0) w=1;
if (h==0) h=1;
/* check if the size changed */
if (w != ctxcanvas->canvas->w ||
h != ctxcanvas->canvas->h)
{
delete ctxcanvas->graphics;
delete ctxcanvas->bitmap;
if (ctxcanvas->bitmap_dbuffer) delete ctxcanvas->bitmap_dbuffer;
ctxcanvas->bitmap_dbuffer = NULL;
Bitmap* bitmap = new Bitmap(w, h, PixelFormat24bppRGB);
bitmap->SetResolution((REAL)(canvas_dbuffer->xres*25.4), (REAL)(canvas_dbuffer->yres*25.4));
ctxcanvas->bitmap = bitmap;
ctxcanvas->graphics = new Graphics(bitmap);
ctxcanvas->canvas->w = w;
ctxcanvas->canvas->h = h;
ctxcanvas->dirty = 1;
cdwpUpdateCanvas(ctxcanvas);
}
return CD_OK;
}
/*
%F cdCreateCanvas para DBuffer.
O DC é um BITMAP em memoria.
*/
static void cdcreatecanvas(cdCanvas* canvas, void *data)
{
int w, h;
cdCanvas* canvas_dbuffer = (cdCanvas*)data;
if (!canvas_dbuffer)
return;
cdCanvasActivate(canvas_dbuffer); /* Update size */
w = canvas_dbuffer->w;
h = canvas_dbuffer->h;
if (w==0) w=1;
if (h==0) h=1;
Bitmap* bitmap = new Bitmap(w, h, PixelFormat24bppRGB);
bitmap->SetResolution((REAL)(canvas_dbuffer->xres*25.4), (REAL)(canvas_dbuffer->yres*25.4));
Graphics imggraphics(bitmap);
imggraphics.Clear(Color((ARGB)Color::White));
Graphics* graphics = new Graphics(bitmap);
canvas->w = w;
canvas->h = h;
canvas->bpp = 24;
/* Initialize base driver */
cdCtxCanvas* ctxcanvas = cdwpCreateCanvas(canvas, graphics, CDW_BMP);
ctxcanvas->bitmap = bitmap;
ctxcanvas->canvas_dbuffer = canvas_dbuffer;
}
static void cdinittable(cdCanvas* canvas)
{
cdwpInitTable(canvas);
canvas->cxActivate = cdactivate;
canvas->cxDeactivate = cddeactivate;
canvas->cxFlush = cdflush;
canvas->cxKillCanvas = cdkillcanvas;
}
static cdContext cdDBufferContext =
{
CD_CAP_ALL & ~(CD_CAP_PLAY | CD_CAP_YAXIS ),
CD_CTX_IMAGE|CD_CTX_PLUS,
cdcreatecanvas,
cdinittable,
NULL,
NULL,
};
extern "C" {
cdContext* cdContextDBufferPlus(void)
{
return &cdDBufferContext;
}
}
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