coco
105 lines
2.3 KiB
C++
105 lines
2.3 KiB
C++
#ifndef RENDER_GDI_H
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#define RENDER_GDI_H
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#include <windows.h>
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class CRenderGDI {
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public:
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CRenderGDI()
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:m_hView(nullptr)
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,m_hDC(nullptr)
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,m_hBitmap(nullptr)
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,m_pixels(nullptr)
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,m_width(0)
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,m_height(0)
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{}
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~CRenderGDI()
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{
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if (m_hDC)
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::DeleteDC(m_hDC);
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if (m_hBitmap)
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::DeleteObject(m_hBitmap);
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}
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virtual bool init(HWND hView)
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{
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m_hView = hView;
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m_hDC = ::CreateCompatibleDC(0);
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RECT rect;
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::GetClientRect(hView, &rect);
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resize(rect.right, rect.bottom);
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return true;
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}
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virtual void destroy()
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{
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delete this;
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}
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virtual void resize(unsigned int w, unsigned int h)
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{
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if (m_width == w && m_height == h)
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return;
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m_width = w;
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m_height = h;
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m_pixels = nullptr;
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}
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void renderOnBlinkPaint(wkeWebView webView, HDC hBlinkDC, int x, int y, int cx, int cy)
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{
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if (m_pixels == nullptr) {
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if (m_width != cx || m_height != cy)
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return;
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createBitmap();
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}
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HDC hScreenDC = ::GetDC(m_hView);
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::BitBlt(m_hDC, x, y, m_width, m_height, hBlinkDC, x, y, SRCCOPY);
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::BitBlt(hScreenDC, x, y, m_width, m_height, m_hDC, x, y, SRCCOPY);
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::ReleaseDC(m_hView, hScreenDC);
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}
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void renderOnWindowPaint(wkeWebView webView, HDC hScreenDC)
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{
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if (m_pixels == nullptr) {
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return;
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}
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::BitBlt(hScreenDC, 0, 0, m_width, m_height, m_hDC, 0, 0, SRCCOPY);
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}
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void createBitmap()
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{
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BITMAPINFO bi;
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memset(&bi, 0, sizeof(bi));
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bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = int(m_width);
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bi.bmiHeader.biHeight = -int(m_height);
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biCompression = BI_RGB;
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HBITMAP hbmp = ::CreateDIBSection(0, &bi, DIB_RGB_COLORS, &m_pixels, nullptr, 0);
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::SelectObject(m_hDC, hbmp);
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if (m_hBitmap)
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::DeleteObject(m_hBitmap);
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m_hBitmap = hbmp;
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}
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private:
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HWND m_hView;
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HBITMAP m_hBitmap;
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HDC m_hDC;
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unsigned int m_width;
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unsigned int m_height;
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void* m_pixels;
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};
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#endif |