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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "WindowContextFactory_unix.h"
#include "../RasterWindowContext.h"
#include "SkSurface.h"
using sk_app::RasterWindowContext;
using sk_app::DisplayParams;
namespace {
class RasterWindowContext_xlib : public RasterWindowContext {
public:
RasterWindowContext_xlib(Display*, XWindow, int width, int height, const DisplayParams&);
sk_sp<SkSurface> getBackbufferSurface() override;
void swapBuffers() override;
bool isValid() override { return SkToBool(fWindow); }
void resize(int w, int h) override;
void setDisplayParams(const DisplayParams& params) override;
protected:
sk_sp<SkSurface> fBackbufferSurface;
Display* fDisplay;
XWindow fWindow;
GC fGC;
typedef RasterWindowContext INHERITED;
};
RasterWindowContext_xlib::RasterWindowContext_xlib(Display* display, XWindow window, int width,
int height, const DisplayParams& params)
: INHERITED(params)
, fDisplay(display)
, fWindow(window) {
fGC = XCreateGC(fDisplay, fWindow, 0, nullptr);
this->resize(width, height);
fWidth = width;
fHeight = height;
}
void RasterWindowContext_xlib::setDisplayParams(const DisplayParams& params) {
fDisplayParams = params;
XWindowAttributes attrs;
XGetWindowAttributes(fDisplay, fWindow, &attrs);
this->resize(attrs.width, attrs.height);
}
void RasterWindowContext_xlib::resize(int w, int h) {
SkImageInfo info = SkImageInfo::Make(w, h, fDisplayParams.fColorType, kPremul_SkAlphaType,
fDisplayParams.fColorSpace);
fBackbufferSurface = SkSurface::MakeRaster(info, &fDisplayParams.fSurfaceProps);
}
sk_sp<SkSurface> RasterWindowContext_xlib::getBackbufferSurface() { return fBackbufferSurface; }
void RasterWindowContext_xlib::swapBuffers() {
SkPixmap pm;
if (!fBackbufferSurface->peekPixels(&pm)) {
return;
}
int bitsPerPixel = pm.info().bytesPerPixel() * 8;
XImage image;
memset(&image, 0, sizeof(image));
image.width = pm.width();
image.height = pm.height();
image.format = ZPixmap;
image.data = (char*) pm.addr();
image.byte_order = LSBFirst;
image.bitmap_unit = bitsPerPixel;
image.bitmap_bit_order = LSBFirst;
image.bitmap_pad = bitsPerPixel;
image.depth = 24;
image.bytes_per_line = pm.rowBytes() - pm.width() * pm.info().bytesPerPixel();
image.bits_per_pixel = bitsPerPixel;
if (!XInitImage(&image)) {
return;
}
XPutImage(fDisplay, fWindow, fGC, &image, 0, 0, 0, 0, pm.width(), pm.height());
}
} // anonymous namespace
namespace sk_app {
namespace window_context_factory {
WindowContext* NewRasterForXlib(const XlibWindowInfo& info, const DisplayParams& params) {
WindowContext* ctx = new RasterWindowContext_xlib(info.fDisplay, info.fWindow, info.fWidth,
info.fHeight, params);
if (!ctx->isValid()) {
delete ctx;
ctx = nullptr;
}
return ctx;
}
} // namespace window_context_factory
} // namespace sk_app
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