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Docs: LCL/graphutil. Modifies content in ScaleImg topic for changes in 77121d9b.

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* Exit ScaleImg immediately when size change for the image is not needed.
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dsiders 2024-11-05 20:30:51 +00:00
parent 77121d9b42
commit a265712f5f
1 changed files with 24 additions and 13 deletions
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37
docs/xml/lcl/graphutil.xml
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@ -708,30 +708,41 @@ Original author: Chris Rorden
</element>
<element name="ScaleImg">
<short>Scales the specified image to the required dimensions.</short>
<short>
Scales the specified bitmap image to the required dimensions.
</short>
<descr>
<p>
<var>ScaleImg</var> is a procedure used to scale the image in
<var>ScaleImg</var> is a procedure used to scale the bitmap in
<var>AImage</var> to the dimensions in <var>AWidth</var> and
<var>AWidth</var>.
</p>
<p>
No actions are performed in the routine if the image already has the dimensions
specified in AWidth and AHeight.
</p>
<p>
ScaleImg calls the <var>CreateIntfImage</var> method in <var>AImage</var> to
get a <var>TLazIntfImage</var> instance with the original content. A
temporary <var>TLazCanvas</var> instance is created for the source image, and
its <var>StretchDraw</var> method is called to resize and draw the interface
image on the Canvas. AImage is updated with the resized content, and its
get a <var>TLazIntfImage</var> instance with the original content. A temporary
<var>TLazCanvas</var> instance is created for the source image, and its
<var>StretchDraw</var> method is called to resize and draw the interface image
on its Canvas. AImage is updated with the resized content, and its
<var>Height</var> and <var>Width</var> properties are set to the parameter
values.
</p>
</descr>
<seealso></seealso>
<seealso>
<link id="#lcl.graphics.TCustomBitmap.CreateIntfImage">TCustomBitmap.CreateIntfImage</link>
<link id="#lcl.graphics.TRasterImage.LoadFromIntfImage">TRasterImage.LoadFromIntfImage</link>
<link id="#lcl.lazcanvas.TLazCanvas">TLazCanvas</link>
<link id="#lcl.intfgraphics.TLazIntfImage">TLazIntfImage</link>
</seealso>
</element>
<element name="ScaleImg.AImage">
<short>Bitmap image resize in the routine.</short>
<short>Bitmap image resized in the routine.</short>
</element>
<element name="ScaleImg.AWidth">
<short>New Width requested for the image.</short>
<short>New width requested for the image.</short>
</element>
<element name="ScaleImg.AHeight">
<short>New height requested for the image.</short>
@ -739,8 +750,8 @@ values.
<element name="ColorRGBToHLS">
<short>
Converts an RGB color value to Hue, Lightness, and Saturation values
.</short>
Converts an RGB color value to Hue, Luminance, and Saturation values.
</short>
<descr></descr>
<errors/>
<seealso></seealso>
@ -770,10 +781,10 @@ Converts an RGB color value to Hue, Lightness, and Saturation values
<element name="ColorHLSToRGB.Hue">
<short></short>
</element>
<element name="ColorHLSToRGB.Luminance">
<element name="ColorHLSToRGB.Saturation">
<short></short>
</element>
<element name="ColorHLSToRGB.Saturation">
<element name="ColorHLSToRGB.Luminance">
<short></short>
</element>