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#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
/* Visual C++ 7.1 + SP1
GDI+ 1.0 File Version 5.1.3102.2180
*/
void DrawLineMarks(Graphics* graphics, Pen* greenPen, int x, int y, int w, int h)
{
graphics->DrawLine(greenPen, x+w-1, y-5, x+w-1, y+5); // end markers
graphics->DrawLine(greenPen, x-5, y+h-1, x+5, y+h-1);
}
void SimpleImageTest(HWND hWnd)
{
int x, y;
Graphics* graphics = new Graphics(hWnd);
graphics->Clear(Color(255, 255, 255)); // white background
Bitmap image(16, 16, PixelFormat24bppRGB);
image.SetResolution(graphics->GetDpiX(), graphics->GetDpiX());
/* black pixel border */
for (y = 0; y < 16; y++)
image.SetPixel(0, y, Color(0, 0, 0));
for (y = 0; y < 16; y++)
image.SetPixel(15, y, Color(0, 0, 0));
for (x = 1; x < 15; x++)
image.SetPixel(x, 0, Color(0, 0, 0));
for (x = 1; x < 15; x++)
image.SetPixel(x, 15, Color(0, 0, 0));
/* light yellow contents */
for (y = 1; y < 15; y++)
for (x = 1; x < 15; x++)
image.SetPixel(x, y, Color(192, 192, 0));
Pen redPen(Color(255, 0, 0), 1);
redPen.SetDashStyle(DashStyleDash);
Pen greenPen(Color(0, 255, 0), 1);
greenPen.SetDashStyle(DashStyleDash);
// I add {} to avoid reusing some Rect in the next test
graphics->SetPixelOffsetMode(PixelOffsetModeHalf); // pixel center is (.5,.5) instead of (0, 0)
// NO zoom
{
RectF actualRect(10, 10, 16, 16);
graphics->DrawImage(&image, 10, 10);
graphics->DrawRectangle(&redPen, actualRect);
DrawLineMarks(graphics, &greenPen, 10, 10, 16, 16);
}
// zoom using Bilinear Interpolation
{
RectF zoomRect(50, 10, 160, 160);
graphics->SetInterpolationMode(InterpolationModeBilinear);
graphics->DrawImage(&image, zoomRect);
graphics->DrawRectangle(&redPen, zoomRect);
DrawLineMarks(graphics, &greenPen, 50, 10, 160, 160);
}
// zoom using Nearest Neighborhood
{
RectF zoomRect2(250, 10, 160, 160);
graphics->SetInterpolationMode(InterpolationModeNearestNeighbor);
graphics->DrawImage(&image, zoomRect2);
graphics->DrawRectangle(&redPen, zoomRect2);
DrawLineMarks(graphics, &greenPen, 250, 10, 160, 160);
}
// Using a source image size, smaller than actual
// NO zoom
{
RectF actualRect3(10, 200, 16, 16);
graphics->DrawImage(&image, actualRect3, 0, 0, 16-1, 16-1, UnitPixel, NULL, NULL);
graphics->DrawRectangle(&redPen, actualRect3);
DrawLineMarks(graphics, &greenPen, 10, 400, 16, 16);
}
// zoom using Bilinear Interpolation
{
RectF zoomRect6(50, 200, 160, 160);
graphics->SetInterpolationMode(InterpolationModeBilinear);
graphics->DrawImage(&image, zoomRect6, 0, 0, 16-1, 16-1, UnitPixel, NULL, NULL);
graphics->DrawRectangle(&redPen, zoomRect6);
DrawLineMarks(graphics, &greenPen, 50, 400, 160, 160);
}
// zoom using Nearest Neighborhood
{
RectF zoomRect7(250, 200, 160, 160);
graphics->SetInterpolationMode(InterpolationModeNearestNeighbor);
graphics->DrawImage(&image, zoomRect7, 0, 0, 16-1, 16-1, UnitPixel, NULL, NULL);
graphics->DrawRectangle(&redPen, zoomRect7);
DrawLineMarks(graphics, &greenPen, 250, 400, 160, 160);
}
delete graphics;
}
#include <iup.h>
extern "C" char* winData;
extern "C" void SimpleDrawTest(void);
void SimpleDrawTest(void)
{
HWND hWnd = (HWND)IupGetAttribute((Ihandle*)winData, "HWND");
SimpleImageTest(hWnd);
}
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