初版-带一个进度条

sources/Bitmap.cpp

@@ -0,0 +1,180 @@
+#include "Bitmap.h"
+#include <gdiplus.h>
+namespace ezui {
+	int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
+	{
+		UINT  num = 0;          // number of image encoders
+		UINT  size = 0;         // size of the image encoder array in bytes
+
+		Gdiplus::ImageCodecInfo* pImageCodecInfo = NULL;
+
+		Gdiplus::GetImageEncodersSize(&num, &size);
+		if (size == 0) {
+			return -1;  // Failure
+		}
+
+		pImageCodecInfo = (Gdiplus::ImageCodecInfo*)(malloc(size));
+		if (pImageCodecInfo == NULL) {
+			return -1;  // Failure
+		}
+
+		Gdiplus::GetImageEncoders(num, size, pImageCodecInfo);
+
+		for (UINT j = 0; j < num; ++j)
+		{
+			if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0)
+			{
+				*pClsid = pImageCodecInfo[j].Clsid;
+				free(pImageCodecInfo);
+				return j;  // Success
+			}
+		}
+		free(pImageCodecInfo);
+		return -1;  // Failure
+	}
+
+	Bitmap::Bitmap(int width, int height) {
+		Create(width, height);
+	}
+	Bitmap::Bitmap(HDC dc, const Rect& rect) {
+		Create(rect.Width, rect.Height);
+		::BitBlt(this->GetDC(), 0, 0, rect.Width, rect.Height, dc, rect.X, rect.Y, SRCCOPY);
+	}
+	void Bitmap::Create(int width, int height) {
+		m_width = width;
+		m_height = height;
+		memset(&m_bmpInfo, 0, sizeof(m_bmpInfo));
+		BITMAPINFOHEADER& bmih = m_bmpInfo.bmiHeader;
+		bmih.biSize = sizeof(bmih);
+		bmih.biBitCount = 32;
+		bmih.biCompression = BI_RGB;
+		bmih.biPlanes = 1;
+		bmih.biWidth = width;
+		bmih.biHeight = -height;
+		bmih.biSizeImage = width * height * 4;
+		m_bmp = ::CreateDIBSection(NULL, &m_bmpInfo, DIB_RGB_COLORS, (void**)&m_point, NULL, 0);
+		::memset(m_point, 0, bmih.biSizeImage);
+		this->GetDC();
+	}
+	int Bitmap::Width()const {
+		return m_width;
+	}
+	int Bitmap::Height() const {
+		return m_height;
+	}
+	void Bitmap::SetPixel(int x, int y, const Color& color) {
+		DWORD* point = (DWORD*)this->m_point + (x + y * this->Width());//起始地址+坐标偏移	
+
+		((BYTE*)point)[3] = color.GetA();//修改A通道数值
+		((BYTE*)point)[2] = color.GetR();//修改R通道数值
+		((BYTE*)point)[1] = color.GetG();//修改G通道数值
+		((BYTE*)point)[0] = color.GetB();//修改B通道数值
+	}
+
+	Color Bitmap::GetPixel(int x, int y) const {
+		DWORD* point = (DWORD*)this->m_point + (x + y * this->Width());//起始地址+坐标偏移
+		BYTE a, r, g, b;
+		a = ((BYTE*)point)[3];
+		r = ((BYTE*)point)[2];//修改R通道数值
+		g = ((BYTE*)point)[1];//修改G通道数值
+		b = ((BYTE*)point)[0];//修改B通道数值
+		return Color(r, g, b, a);
+	}
+	byte* Bitmap::GetPixel()
+	{
+		return (byte*)this->m_point;
+	}
+	void Bitmap::Earse(const Rect& _rect) {
+		Rect rect = _rect;
+		if (rect.X < 0) {
+			rect.X = 0;
+			rect.Width += rect.X;
+		}
+		if (rect.Y < 0) {
+			rect.Y = 0;
+			rect.Height += rect.Y;
+		}
+		if (rect.GetBottom() > Height()) {
+			rect.Height = this->Height() - rect.Y;
+		}
+		if (rect.GetRight() > Width()) {
+			rect.Width = this->Width() - rect.X;
+		}
+		for (int y = rect.Y; y < rect.GetBottom(); ++y)
+		{
+			DWORD* point = (DWORD*)this->m_point + (rect.X + y * this->Width());//起始地址+坐标偏移
+			::memset(point, 0, rect.Width * 4);//抹除
+		}
+	}
+	HBITMAP Bitmap::GetHBITMAP()
+	{
+		return this->m_bmp;
+	}
+	HDC Bitmap::GetDC() {
+		if (!m_hdc) {
+			m_hdc = ::CreateCompatibleDC(NULL);
+			::SelectObject(m_hdc, m_bmp);
+		}
+		return m_hdc;
+	}
+	bool Bitmap::Save(const UIString& fileName)
+	{
+		size_t pos = fileName.rfind(".");
+		UIString ext;
+		if (pos != size_t(-1)) {
+			ext = fileName.substr(pos);
+			ext = ext.toLower();
+		}
+
+		bool ret = false;
+		Gdiplus::Bitmap* pbmSrc = NULL;
+		do
+		{
+			CLSID pngClsid;
+			int code = -1;
+			if (ext == ".png") {
+				code = GetEncoderClsid(L"image/png", &pngClsid);
+			}
+			else if (ext == ".jpg" || ext == ".jpeg") {
+				code = GetEncoderClsid(L"image/jpeg", &pngClsid);
+			}
+			else if (ext == ".tiff") {
+				code = GetEncoderClsid(L"image/tiff", &pngClsid);
+			}
+			else {
+				code = GetEncoderClsid(L"image/bmp", &pngClsid);
+			}
+			if (code == -1) {
+				break;
+			}
+			pbmSrc = new Gdiplus::Bitmap(Width(), Height(), Width() * 4, PixelFormat32bppARGB, (BYTE*)GetPixel());
+			if (pbmSrc && pbmSrc->Save(fileName.unicode().c_str(), &pngClsid) == Gdiplus::Status::Ok)
+			{
+				ret = true;
+				break;
+			}
+		} while (false);
+		if (pbmSrc) {
+			delete pbmSrc;
+		}
+		return ret;
+	}
+
+	Bitmap* Bitmap::Clone() const {
+		if (m_width <= 0 || m_height <= 0) {
+			return NULL;
+		}
+		// 创建新 Bitmap 对象（保留格式）
+		Bitmap* clone = new Bitmap(m_width, m_height);
+		//拷贝像素
+		memcpy(clone->m_point, m_point, m_width * m_height * 4);
+		return clone;
+	}
+
+	Bitmap::~Bitmap() {
+		if (m_hdc) {
+			::DeleteDC(m_hdc);
+			::DeleteObject((HGDIOBJ)(HBITMAP)(m_bmp));
+		}
+	}
+};