vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_BETTER);
vgSeti(VG_IMAGE_QUALITY, VG_IMAGE_QUALITY_BETTER);
vgSeti(VG_SCISSORING, VG_FALSE);
col[0] = 0.0f; col[1] = 0.0f; col[2] = 0.0f; col[3] = 0.0f;
vgSetfv(VG_CLEAR_COLOR, 4, col);
vgClear(0, 0, 256, 256);

// create image and load external data
imgSrc = vgCreateImage(VG_lRGBA_8888, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight, VG_IMAGE_QUALITY_NONANTIALIASED);
vgImageSubData(imgSrc, (const void *)&imgBarbaraAlphaData[imgBarbaraAlphaWidth * (imgBarbaraAlphaHeight - 1)], -imgBarbaraAlphaDataStride, imgBarbaraAlphaFormat, 0, 0, imgBarbaraAlphaWidth, imgBarbaraAlphaHeight);

// create a path
path0 = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1.0f, 0.0f, 0, 0, VG_PATH_CAPABILITY_ALL);
pathSegs[0] = VG_MOVE_TO_ABS;
pathData[0] = -20.0f; pathData[1] = 20.0f;
pathSegs[1] = VG_CUBIC_TO_ABS;
pathData[2] = -200.0f; pathData[3] = 170.0f; pathData[4] = -200.0f; pathData[5] = -170.0f; pathData[6] = -20.0f; pathData[7] = -20.0f;
pathSegs[2] = VG_CUBIC_TO_ABS;
pathData[8] = -170.0f; pathData[9] = -200.0f; pathData[10] = 170.0f; pathData[11] = -200.0f; pathData[12] = 20.0f; pathData[13] = -20.0f;
pathSegs[3] = VG_CUBIC_TO_ABS;
pathData[14] = 200.0f; pathData[15] = -170.0f; pathData[16] = 200.0f; pathData[17] = 170.0f; pathData[18] = 20.0f; pathData[19] = 20.0f;
pathSegs[4] = VG_CUBIC_TO_ABS;
pathData[20] = 170.0f; pathData[21] = 200.0f; pathData[22] = -170.0f; pathData[23] = 200.0f; pathData[24] = -20.0f; pathData[25] = 20.0f;
pathSegs[5] = VG_CLOSE_PATH;
vgAppendPathData(path0, 6, pathSegs, pathData);

// create and set a paint for fill
strokePaint = vgCreatePaint();

colStops[0]  = 0.00f; colStops[1]  = 0.4f; colStops[2]  = 0.0f; colStops[3]  = 0.6f; colStops[4]  = 0.70f;
colStops[5]  = 0.25f; colStops[6]  = 0.9f; colStops[7]  = 0.5f; colStops[8]  = 0.1f; colStops[9]  = 0.70f;
colStops[10] = 0.50f; colStops[11] = 0.8f; colStops[12] = 0.8f; colStops[13] = 0.0f; colStops[14] = 0.70f;
colStops[15] = 0.75f; colStops[16] = 0.0f; colStops[17] = 0.3f; colStops[18] = 0.5f; colStops[19] = 0.70f;
colStops[20] = 1.00f; colStops[21] = 0.4f; colStops[22] = 0.0f; colStops[23] = 0.6f; colStops[24] = 0.70f;

radGrad[0] = 0.0f; radGrad[1] = 0.0f;
radGrad[2] = -30.0f; radGrad[3] = -5.0f;
radGrad[4] = 65.0f;
vgSetParameteri(strokePaint, VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
vgSetParameterfv(strokePaint, VG_PAINT_COLOR_RAMP_STOPS, 25, colStops);
vgSetParameterfv(strokePaint, VG_PAINT_RADIAL_GRADIENT, 5, radGrad);
vgSetPaint(strokePaint, VG_STROKE_PATH);

// set a scissor rectangle
scissorRects[0] = 10.0f;  scissorRects[1] = 10.0f;  scissorRects[2] = 236.0f;  scissorRects[3] = 236.0f;
vgSetfv(VG_SCISSOR_RECTS, 4, scissorRects);
vgSeti(VG_SCISSORING, VG_TRUE);

// set alpha mask
vgMask(imgSrc, VG_SET_MASK, 0, 0, 256, 256);
vgSeti(VG_MASKING, VG_FALSE);
col[0] = 0.0f; col[1] = 0.0f; col[2] = 0.0f; col[3] = 0.9f;
vgSetfv(VG_CLEAR_COLOR, 4, col);

vgSetfv(VG_STROKE_DASH_PATTERN, 0, NULL);
vgSetf(VG_STROKE_LINE_WIDTH, 35.0f);
vgSeti(VG_STROKE_JOIN_STYLE, VG_JOIN_ROUND);

for (i = VG_BLEND_SRC; i <= VG_BLEND_ADDITIVE; ++i) {

	vgClear(0, 0, 256, 256);
	vgSeti(VG_BLEND_MODE, i);
	
	vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
	vgLoadIdentity();
	vgScale(0.2f, 0.4f);
	vgRotate(-120.0f);
	
	vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REPEAT);
	vgLoadIdentity();
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REFLECT);
	vgLoadIdentity();
	vgTranslate(256.0f, 0.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REPEAT);
	vgLoadIdentity();
	vgTranslate(256.0f, 256.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REFLECT);	
	vgLoadIdentity();
	vgTranslate(0.0f, 256.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);

	vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
	vgLoadIdentity();
	vgRotate(-30.0f);
	vgScale(1.5f, 1.9f);
	vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);		
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_PAD);	
	vgLoadIdentity();
	vgTranslate(128.0f, 128.0f);
	vgRotate(45.0f);
	vgScale(0.9f, 0.8f);
	vgDrawPath(path0, VG_STROKE_PATH);

	strcpy(imgFileName, "stroke_path_radgrad_");
	strcat(imgFileName, blendModeToString(i));
	strcat(imgFileName, ".png");
	strcpy(testDesc, "Test stroking with radial gradient and ");
	strcat(testDesc, blendModeToString(i));
	strcat(testDesc, " blend mode (without alpha mask)");
	
	saveDrawingSurface(f, imgFileName, testDesc, 0, 0, 256, 256);
	eglSwapBuffers(display, surface);
}

for (i = VG_BLEND_SRC; i <= VG_BLEND_ADDITIVE; ++i) {

	vgSeti(VG_MASKING, VG_FALSE);
	vgClear(0, 0, 256, 256);
	vgSeti(VG_BLEND_MODE, i);

	vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
	vgLoadIdentity();
	vgScale(0.2f, 0.4f);
	vgRotate(-120.0f);

	vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REPEAT);
	vgLoadIdentity();
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REFLECT);
	vgLoadIdentity();
	vgTranslate(256.0f, 0.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REPEAT);
	vgLoadIdentity();
	vgTranslate(256.0f, 256.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_REFLECT);	
	vgLoadIdentity();
	vgTranslate(0.0f, 256.0f);
	vgScale(0.7f, 0.7f);
	vgDrawPath(path0, VG_STROKE_PATH);
	

	vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
	vgLoadIdentity();
	vgRotate(-30.0f);
	vgScale(1.5f, 1.9f);
	
	vgSeti(VG_MASKING, VG_TRUE);
	vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);		
	vgSetParameteri(strokePaint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_PAD);	
	vgLoadIdentity();
	vgTranslate(128.0f, 128.0f);
	vgRotate(45.0f);
	vgScale(0.9f, 0.8f);
	vgDrawPath(path0, VG_STROKE_PATH);

	strcpy(imgFileName, "stroke_path_radgrad_");
	strcat(imgFileName, blendModeToString(i));
	strcat(imgFileName, "_mask.png");
	strcpy(testDesc, "Test stroking with radial gradient and ");
	strcat(testDesc, blendModeToString(i));
	strcat(testDesc, " blend mode (with alpha mask)");
	
	saveDrawingSurface(f, imgFileName, testDesc, 0, 0, 256, 256);
	eglSwapBuffers(display, surface);
}

vgDestroyImage(imgSrc);
vgDestroyPath(path0);
vgDestroyPaint(strokePaint);