87 lines
1.8 KiB
C++
87 lines
1.8 KiB
C++
#include <precomp.h>
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#include "backbufferwnd.h"
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#include <tataki/canvas/bltcanvas.h>
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#include <api/api.h>
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#include <tataki/region/region.h>
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// -----------------------------------------------------------------------
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BackBufferWnd::BackBufferWnd() {
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backbuffer = 0;
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canvas_w = -1;
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canvas_h = -1;
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back_buffer = NULL;
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}
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// -----------------------------------------------------------------------
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BackBufferWnd::~BackBufferWnd() {
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delete back_buffer;
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}
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//------------------------------------------------------------------------
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BltCanvas *BackBufferWnd::getBackBuffer() {
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return back_buffer;
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}
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// -----------------------------------------------------------------------
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int BackBufferWnd::onPaint(Canvas *canvas) {
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BBWND_PARENT::onPaint(canvas);
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if (!canvas) return 1;
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RECT r;
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getClientRect(&r);
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if (back_buffer && r.right-r.left > 0 && r.bottom -r.top > 0) {
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int w = r.right-r.left;
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int h = r.bottom-r.top;
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if (canvas_w != w || canvas_h != h) {
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delete back_buffer;
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back_buffer = new BltCanvas(w, h, getOsWindowHandle());
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canvas_w = w;
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canvas_h = h;
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}
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#ifdef _WIN32
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RegionI reg;
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canvas->getClipRgn(®);
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back_buffer->selectClipRgn(®);
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#else
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#warning port me
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#endif
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canvas->blit(r.left, r.top, back_buffer, 0, 0, w, h);
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back_buffer->selectClipRgn(NULL);
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}
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return 1;
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}
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int BackBufferWnd::onSiblingInvalidateRgn(api_region *r, ifc_window *who, int who_idx, int my_idx) {
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if (who_idx >= my_idx || !wantBackBuffer()) return 0;
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RECT rr;
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getClientRect(&rr);
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api_region *_r = getRegion();
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RegionI *__r=NULL;
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if (!_r) {
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__r = new RegionI();
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_r = __r;
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_r->setRect(&rr);
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} else {
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_r->offset(rr.left, rr.top);
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}
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int intersect = _r->doesIntersectRgn(r);
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if (intersect)
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r->addRegion(_r);
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delete __r;
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return intersect;
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}
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