michael@0: Fix single and multi-stop solid gradients by multiplying by the alpha component. r=roc
michael@0: 
michael@0: This cairo commit that caused the problem: 2d790daa957471670f4ae0d3b22da89e4ee7111f.
michael@0: It was merged into mozilla-central with 1effb72d30cf
michael@0: 
michael@0: diff --git a/gfx/cairo/cairo/src/cairo-pattern.c b/gfx/cairo/cairo/src/cairo-pattern.c
michael@0: --- a/gfx/cairo/cairo/src/cairo-pattern.c
michael@0: +++ b/gfx/cairo/cairo/src/cairo-pattern.c
michael@0: @@ -2262,8 +2262,17 @@ _cairo_pattern_acquire_surface (const ca
michael@0:  
michael@0:  	    if (src->n_stops)
michael@0:  	    {
michael@0: +		cairo_color_t color;
michael@0: +
michael@0: +		/* multiply by alpha */
michael@0: +		_cairo_color_init_rgba (&color,
michael@0: +			src->stops->color.red,
michael@0: +			src->stops->color.green,
michael@0: +			src->stops->color.blue,
michael@0: +			src->stops->color.alpha);
michael@0: +
michael@0:  		_cairo_pattern_init_solid (&solid,
michael@0: -					   &src->stops->color,
michael@0: +					   &color,
michael@0:  					   CAIRO_CONTENT_COLOR_ALPHA);
michael@0:  	    }
michael@0:  	    else
michael@0: @@ -2295,9 +2304,17 @@ _cairo_pattern_acquire_surface (const ca
michael@0:  	    }
michael@0:  	    if (i == src->n_stops) {
michael@0:  		cairo_solid_pattern_t solid;
michael@0: +		cairo_color_t color;
michael@0: +
michael@0: +		/* multiply by alpha */
michael@0: +		_cairo_color_init_rgba (&color,
michael@0: +			src->stops->color.red,
michael@0: +			src->stops->color.green,
michael@0: +			src->stops->color.blue,
michael@0: +			src->stops->color.alpha);
michael@0:  
michael@0:  		_cairo_pattern_init_solid (&solid,
michael@0: -					   &src->stops->color,
michael@0: +					   &color,
michael@0:  					   CAIRO_CONTENT_COLOR_ALPHA);
michael@0:  
michael@0:  		status =