No effect with opacity in draw operator

[Watson1978]

ImageMagick version

7.1.1-29

Operating system

Other (enter below)

Operating system, version and so on

Linux 6.8.8, macOS 14.4.1

Description

I think the opacity in draw operator should effect the image as same as when using fill_opacity and stroke_opacity in draw operator.
In fact, it is implemented as such.

ImageMagick/MagickCore/draw.c

Lines 3228 to 3253 in b9dc200

	if (LocaleCompare("opacity",keyword) == 0)
	{
	double
	opacity;
	(void) GetNextToken(q,&q,extent,token);
	if (graphic_context[n]->clip_path != MagickFalse)
	break;
	factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
	opacity=MagickMin(MagickMax(factor*
	GetDrawValue(token,&next_token),0.0),1.0);
	if (token == next_token)
	ThrowPointExpectedException(token,exception);
	if (graphic_context[n]->compliance == SVGCompliance)
	{
	graphic_context[n]->fill_alpha*=opacity;
	graphic_context[n]->stroke_alpha*=opacity;
	}
	else
	{
	graphic_context[n]->fill_alpha=(double) QuantumRange*opacity;
	graphic_context[n]->stroke_alpha=(double) QuantumRange*opacity;
	}
	break;
	}
	status=MagickFalse;

However, it doesn't work with recently ImageMagick 6 and 7.

Steps to Reproduce

~/imagemagick7.1/bin/convert -size 420x120 xc:gray \
  -draw "stroke 'blue'; fill 'yellow'; \
         stroke-width 10; \
         opacity  25%; roundrectangle  20,20, 100,100,5,5; \
         opacity  50%; roundrectangle 120,20, 200,100,5,5; \
         opacity  75%; roundrectangle 220,20, 300,100,5,5; \
         opacity 100%; roundrectangle 320,20, 400,100,5,5; " \
  result_7_1.png

If I ran above command with ImageMagick 6.8.9-10, it works as expected.

Images

ImageMagick 6.8	ImageMagick 6.9	ImageMagick 7.1

[fmw42]

I confirm, when I do your command on IM 7.1.1.32 Mac OSX Ventura, I get an image with an opaque alpha set on the result. But none of the drawn features show the specified opacity.

magick -size 420x120 xc:gray \
-draw "stroke blue fill yellow \
stroke-width 10 \
opacity  25% roundrectangle  20,20 100,100 5,5 \
opacity  50% roundrectangle 120,20 200,100 5,5 \
opacity  75% roundrectangle 220,20 300,100 5,5 \
opacity 100% roundrectangle 320,20 400,100 5,5" \
result_7_1.png

[dlemstra]

I just pushed a patch to solve this issue in IM7. But we are getting a different (correct) output compared to 6.8:

[fmw42]

Is that the IM 7 new result or the IM 6 result? Can you show both?

[dlemstra]

I haven't found a proper fix for IM6 yet and this is the IM7 result.

[Watson1978]

Seems this issue has been solved at 6.9.13-11 and 7.1.1-33. Thanks.