C语言版GDI+应用例子 -- 文字

本文是使用C语言版GDI+仿C#文字绘制的例子代码：

#include "..\..\SampleCode\comcode\Application.h"

#pragma hdrstop

WCHAR flowedText1[] =
		L"I went down to the St James Infirmary,\n \
Saw my baby there,\n \
Stretched out on a long white table,\n \
So sweet,so cold,so fair,\n \
Let her go,let her go,God bless her,\n \
Wherever she may be,\n \
She can look this wide world over,\n \
But she'll never find a sweet man like me,\n \
When I die want you to dress me in straight lace shoes,\n \
I wanna a boxback coat and a Stetson hat,\n \
Put a twenty dollar gold piece on my watch chain,\n \
So the boys'll know that I died standing up.";

WCHAR flowedText2[] =
		L"the sky seems full when you're in the cradle\n \
the rain will fall and wash your dreams\n \
stars are stars and they shine so hard...\n \
now spit out the sky because its empty\n \
and hollow and all your dreams are hanging out to dry\n \
stars are stars and they shine so cold...\n \
once i like crying twice i like laughter\n \
come tell me what i'm after.";

WCHAR japaneseText[] = {
		31169, 12398, 21517, 21069, 12399, 12463,
		12522, 12473, 12391, 12377, 12290, 0};

PGpBrush backgroundBrush;
PGpBrush textTextureBrush;
PGpBrush titleShadowBrush;
PGpBrush linearGradBrush;

PGpFont	titleFont;
PGpFont	textFont;
PGpFont	thisFont;
PGpFont japaneseFont;

void OnCreate(void)
{
	Point ps[] = {{0, 0}, {0, 45}};
	PGpFontFamily serifFontFamily = FontFamilyGenericSerif();

	//Load the image to be used for the background from the exe's resource fork
	PGpImage image = ImageCreate(L"..\\..\\Media\\colorbars.jpg");

	//Now create the brush we are going to use to paint the background
	backgroundBrush = TextureBrushCreate(image);
	ImageDelete(image);

	//Load the image to be used for the textured text from the exe's resource fork
	image = ImageCreate(L"..\\..\\Media\\marble.jpg");
	textTextureBrush = TextureBrushCreate(image);
	ImageDelete(image);

	//Load the fonts we want to use
	thisFont = FontFromFamily(serifFontFamily, 20, 0, UnitPoint);
	titleFont = FontFromFamily(serifFontFamily, 60, 0, UnitPoint);
	textFont = FontFromFamily(serifFontFamily, 11, 0, UnitPoint);

	//Set up shadow brush - make it translucent
	titleShadowBrush = SolidBrushCreate(SetAlpha(Black, 70));

	//Set up fonts and brushes for printing japanese text
	japaneseFont = FontCreate(L"MS Mincho", 36, 0);
	linearGradBrush = LineBrushFromPoint(&ps[0], &ps[1], Blue, Red);
}

void OnDestroy(void)
{
	BrushDelete(textTextureBrush);
	BrushDelete(backgroundBrush);
	BrushDelete(titleShadowBrush);
	BrushDelete(linearGradBrush);

	FontDelete(titleFont);
	FontDelete(textFont);
	FontDelete(thisFont);
	FontDelete(japaneseFont);
}

void OnPaint(HDC DC)
{
	WCHAR s[40] = L"Hello Symetrical World";
	RECT clientRect;
	RectF r;
	REAL center;
	INT characters, lines;
	PGpStrFormat format = StrFormatCreate();
	PGpSolidBrush sb = SolidBrushCreate(SetAlpha(White, 180));
	PGpGraphics g = GraphicsCreate(DC);

	GraphicsSetTextRenderingHint(g, TextRenderingHintAntiAlias);

    //Fill the background use the texture brush
	//and then apply a white wash
	GetClientRect(Handle, &clientRect);
	GraphicsFillRectangle(g, backgroundBrush, clientRect.left, clientRect.top, clientRect.right, clientRect.bottom);
	GraphicsFillRectangle(g, sb, clientRect.left, clientRect.top, clientRect.right, clientRect.bottom);

	//Simple draw hello world
	SolidBrushSetColor(sb, Black);
	GraphicsDrawStringXY(g, L"Hello World", thisFont, sb, 10, 10);

	//Draw a textured string
	GraphicsDrawStringXY(g, L"Graphics  Samples", titleFont, titleShadowBrush, 15, 25);
	GraphicsDrawStringXY(g, L"Graphics  Samples", titleFont, textTextureBrush, 10, 20);

	//Use Measure string to display a string at the center of the window
	SolidBrushSetColor(sb, Red);
	center = clientRect.right / 2.0f;
	GraphicsMeasureString(g, s, textFont, &r);
	GraphicsDrawStringXY(g, s, textFont, sb, center - r.Width / 2.0f, 10.0f);

    //Now draw a string flowed into a rectangle
	r = MakeRectF(20.0f, 150.0f, 250.0f, 300.0f);
	SolidBrushSetColor(sb, Gainsboro);
	GraphicsFillRectangleF(g, sb, r.X, r.Y, r.Width, r.Height);
	SolidBrushSetColor(sb, Blue);
	GraphicsDrawString(g, flowedText1, textFont, sb, &r, NULL);

	//Draw more flowed text but this time center it
	r = MakeRectF(420.0f, 150.0f, 250.0f, 300.0f);
	SolidBrushSetColor(sb, Gainsboro);
	GraphicsFillRectangleF(g, sb, r.X, r.Y, r.Width, r.Height);
	StrFormatSetAlignment(format, StringAlignmentCenter);
	SolidBrushSetColor(sb, Blue);
	GraphicsDrawString(g, flowedText2, textFont, sb, &r, format);

	//Work out how many lines and characters we printed just now
	characters = lines = 0;
	GraphicsMeasureStringSize(g, flowedText2, textFont,
		250.0f, 300.0f, format, &r, &characters, &lines);
	wsprintfW(s, L"We printed %d characters and %d lines", characters, lines);
	SolidBrushSetColor(sb, Black);
	GraphicsDrawStringXY(g, s, textFont, sb, 390.0f, 440.0f);

    //If we have the Japanese language pack draw some text in Japanese
    //Rotate it to make life truly exciting
	GraphicsRotate(g, -30, MatrixOrderPrepend);
	GraphicsTranslate(g, -180, 300, MatrixOrderPrepend);
	GraphicsDrawStringXY(g, japaneseText, japaneseFont, linearGradBrush, 175, 125);
	GraphicsResetTransform(g);

	StrFormatDelete(format);
	BrushDelete(sb);
	GraphicsDelete(g);
}

WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	/* 这里使用了双缓冲画窗口，可将第3个参数改为FALSE比较一下效果 */
	InitApplication(hInstance, nCmdShow, TRUE);
	CreateProc = OnCreate;
	DestroyProc = OnDestroy;
	PaintProc = OnPaint;
	return RunApplication(TEXT("C语言Gdiplus演示例子 -- 文字(仿c#例子)"), 700, 500);
}
//---------------------------------------------------------------------------

例子代码使用的窗口框架代码和GDI+ C语言版本下载地址见《在C语言Windows应用程序中使用GDI+》。

下面是运行效果图：

指导和建议请来信：[e-mail]，[e-mail]