Text TOP

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Summary
[edit]

The Text TOP displays text strings in an image. It allows for multiple fonts, sizes, colors, borders, character separation and line separation. The text can be displayed as bit maps, anti-aliased lines, or filled polygon characters. Any TrueType font can be rendered by the Text TOP. Unicode is supported. The new Scalable Display Method uses Slug Library to render scalable, resolution independent text at the highest qulaity available in the Text TOP.

It can display simple text strings with embedded numeric values. It can also format lines of text and numbers in decimal or floating point format, reading the numbers from a CHOP, using special formatting characters.

It can also render text strings from a Table DAT via the Specification DAT parameter, where column headings are the parameter names that are to ve overidden when rendering a line of text for reach row of the table.

Any TrueType or OpenType font that has been loaded into Windows can be rendered by the Text TOP. To import a new font into your Windows system, open the Fonts folder in the Control Panel, then drag and drop your font files in (.ttf/.otf file format). Fonts can also be specified as .ttf/.otf file paths in the Font File parameter.

You can render Unicode text by reading the text as a python string. See Unicode.

Tip: You can use the textTOP_Class.textWidth member to calculate the width of the text in the Text TOP.

See also: Field COMP, Text SOP, Unicode.

TextTOP.jpg

PythonIcon.pngtextTOP_Class


Parameters - Text Page

Field Component field - Specifies a Field Component to use as the source of the text. The font and style of the text displayed in the Field Component are set using the parameters in the Text TOP.

DAT dat - Specifies a DAT to use for the source of the text. Drag and Drop a DAT onto this field, or manually enter the DAT's path.

DAT Row rowindex - The row number (starting from 0) of the cell, if the DAT is a table.

DAT Col colindex - The column number of the cell, if the DAT is a table.

Specification DAT specdat - A Table DAT that allows you to specify and position text by pixel, with the lower left corner being at 0, 0. Column headers must include position1 or x, position2 or y, and text. A sample table can be:

x	y	text		
0	0	lower left text		
100	100	somewhere in the middle

Text text - A string of text. It optionally can be followed by a numeric value and another post-string, as set with Value and Post Text below. If newlines or tabs are desired, the recommended way is to change this parameter to expression mode, and specify a Python string that includes \n or \t to signify newlines and tabs. E.g 'First Line\nSecond Line'.

Legacy Parsing legacyparsing - In older builds the syntax \XXX (E.g \200 would be character 200), \t, \n as well as [] and {} (to position strings) was parsed in the string. This is now deprecated. For specifying characters codes, \t and \n Python syntax should be used instead.. The 'Specification DAT' should be used to position strings instead of [], {}. This parameter can be enabled to turn back on this legacy parsing though. If this is enabled and you want to display the characters \ [ ] { }, you must precede them with a \.

Append Value appendvalue - Enables the Value field defined below. This value is inserted between the Text string and the Post Text string.

Value valuetouse - The numeric value to display.

Total Digits totaldigits - The total number of digits in the value displayed.

Decimal Digits decimaldigits - The number of digits displayed after the decimal place.

Post Text posttext - The text string appended after Text and Value (if present).

CHOP Value %-Replace chopvaluereplace - Allows portions of the strings to be replaced by CHOP values via a syntax similar to C-style printf()/sprintf(). More details of the syntax are provided in the next parameter, 'CHOP' .

CHOP chop - The CHOP containing all the values to insert in the Text strings. The Text TOP will repeat the Text string until all CHOP channels are displayed. They are displayed by using a special syntax in your Text string, defined as string starting with %, for example %4d:

 %[flags][width][.precision][type]

  • flags (optional) - Alignment options.
    • - : left align (text is right aligned by default)
    • 0 : pad the left side with zeros
  • width (optional) - Total number of digits in the number displayed.
  • precision (optional) - Number of digits after the decimal place.
  • type - Number format.
    • d : integer
    • f : float
    • g : double, exponential format is used only when the exponent of the value is less than ?4.

Drag and Drop a CHOP onto this field, or manually enter the CHOP's path.

TextTOPCHOPValue.jpg

Word Wrap wordwrap - When checked text is automatically line wrapped so it doesn't extend outside the TOP's borders. When using Word Wrap and Auto-Size together, the text will first word-wrap based on the specified font size, then auto size the resulting block of text.

Smart Quote smartquote - Enables smart quotes which use a left (opening) quotation mark and a right (closing) quotation mark instead of straight quotes.


Parameters - Font Page

Font font - Select the font for the text from this drop down menu. All fonts are provided by Windows, any TrueType font that is loaded into Windows can be used.

Font File fontfile - Specify any TrueType font file (.ttf file) to use for the text. When using a font file, the Font menu above is disabled.

Character Set charset - - Select which character set to use.

  • Unicode unicode -
  • Symbol symbol -

Display Method dispmethod - - The display method used.

  • Automatic automatic - Automatically chooses which display mode to use based on font size and settings.
  • Polygon polygon - Uses polygons to display the text. Polygons look better using large font sizes. They also support anti-aliasing (see Anti-Aliased below).
  • Stroke stroke - Same as polygons but only an outline of the text is displayed.
  • Bitmap bitmap - Uses bitmap images for the text. Bitmap fonts are better for very small font sizes where high precision is required.
  • Scalable scalable - Uses Slug Library to render high-quality, scalable, resolution independent text.

Anti-Alias antialias - - Smoothes out the edges of the text. Not available for Texture Display Mode.

  • 1x (Off) aa1 -
  • 2x aa2 -
  • 4x aa4 -
  • 8x (Medium) aa8mid -
  • 8x (High) aa8high -
  • 16x (Low) aa16low -
  • 16x (Medium) aa16mid -
  • 16x (High) aa16high -
  • 32x aa32 -

Stroke Width strokewidth - Controls the width of the outline when using Stroke Display Method.

Bold bold - Displays the text in bold.

Italic italic - Displays the text in Italic.

Auto-Size Font fontautosize - - Automatically controls font size using one of the following 3 options. When using this feature along with Word Wrap turned on, it will first word-wrap the text based on the specified font size, then auto size the resulting block of text.

  • No Auto-Fit nofit - Does not use any auto-fitting. Font Size specified in Font Size X and Font Size Y parameters.
  • Auto-Fit Always alwaysfit - The font size will be increased or decreased so the text fits across the Text TOP from edge to edge.
  • Auto-Fit if Too Large fitiffat - Only auto sizes the text if the text is too large and spills past the edges of the Text TOP. In this case the font size will be decreased to fit it within the borders of the TOP.

Font Size X fontsizex - Sets the font size in X (horizontal). Note: Floating point font sizes are permissable when using Polygon and Outline Display Methods.

Font Size X Unit fontsizexunit - Select the units for this parameter from Pixels, Fraction, Fraction Aspect or Points (font point size). A Point is defined using the Windows conventions for 100% scaling, which is 96 pixels to 72 points. That is, a point size of 10 is the same as a pixel size of 10*(96/72) = 13.333.

Font Size Y fontsizey - Sets the font size in Y (vertical). Note: Floating point font sizes are permissable when using Polygon and Outline Display Methods.

Font Size Y Unit fontsizeyunit - Select the units for this parameter from Pixels, Fraction, Fraction Aspect or Points (font point size).

Keep Font Ratio keepfontratio - Ignores Y value in Font Size. Sets both X and Y size to Font Size X.

Break Language breaklang - Language type hint to help format the glyphs correctly.

Reading Direction readingdirection - - Use to set whether the language reads Left to Right or Right to Left.

  • Left To Right lefttoright -
  • Right To Left righttoleft -

Tracking tracking - - The amount of space to add between letters in X and Y. Tracking is way of adding an arbitrary offset between letters. There already is a default offset associated with each font so the letters are flush against each other. The Tracking parameter this adds to that and allows for a Y offset.

  • tracking1 -
  • tracking2 -

Position position - - The starting position of the text in X and Y.

TIP: Inside the Text and Post Text fields the position can be overridden by using brackets.

  • [x,y] - "bleh[x,y]newtext" will place newtext at position (x,y) on the screen.
  • {X,Y} - "bleh{(+/-)x,(+/-)y}newtext" will offset newtext x,y from current position.
  • \n - using "\n" causes the text to move down to the next line and reset its position. (i.e. New Line and Carriage Return)
  • position1 -
  • position2 -

Position Unit positionunit - Select the units for this parameter from Pixels, Fraction (0-1), Fraction Aspect (0-1 considering aspect ratio).

Line Spacing linespacing - Determines the amount of space between lines of text.

Line Spacing Unit linespacingunit - Select the units for this parameter from Pixels, Fraction (0-1), Fraction Aspect (0-1 considering aspect ratio).

Horizontal Align alignx - - Sets the horizontal alignment.

  • Left left - Left justifies the text.
  • Center center - Centers the text.
  • Right right - Right justifies the text.

Horizontal Align Mode alignxmode - - Determines how horizontal alignment is calculated.

  • Use Font Metrics metrics - Uses the font's built-in information to position the text.
  • Use Text Bounding Box bbox - Uses a bounding box around the text to position the text.

Vertical Align aligny - - Sets the vertical alignment.

  • Bottom bottom - Bottom justifies the text.
  • Center center - Centers the text.
  • Top top - Top justifies the text.

Vertical Align Mode alignymode - - Determines how vertical alignment is calculated.

  • Use Font Metrics metrics - Uses the font's built-in information to position the text.
  • Use Text Bounding Box bbox - Uses a bounding box around the text to position the text.

Border Space borderspace - - When using Auto-Size Font, it will further shrink the text to give it a border.

  • borderspace1 -
  • borderspace2 -


Parameters - Color Page

Multiply RGB by Alpha multrgbbyalpha - Multiplies the RGB channels by the alpha channel.

Font Color fontcolor - - RGBA values for the text displayed. (default: white (1,1,1,1))

  • Red fontcolorr -
  • Green fontcolorg -
  • Blue fontcolorb -

Font Alpha fontalpha - Set the alpha value for the font.

Background Color bgcolor - - RGBA values for the background. (default: black (0,0,0,0))

  • Red bgcolorr -
  • Green bgcolorg -
  • Blue bgcolorb -

Background Alpha bgalpha - Set the alpha value for the background.

Border A bordera - - RGBA values for border A color.

  • Red borderar -
  • Green borderag -
  • Blue borderab -

Border A Alpha borderaalpha - Set the alpha value for border A.

Border B borderb - - RGBA values for border B color.

  • Red borderbr -
  • Green borderbg -
  • Blue borderbb -

Border B Alpha borderbalpha - Set the alpha value for border B.

Left Border leftborder - What color the 2 left-most pixels are. Options are 0 (no change), Border A (uses color defined in Border A), or Border B (uses color defined in Border B).

Left Border Inside leftborderi - Same as above parameter but used for an inside border.

Right Border rightborder - What color the 2 right-most pixels are. Options are 0 (no change), Border A (uses color defined in Border A), or Border B (uses color defined in Border B).

Right Border Inside rightborderi - Same as above parameter but used for an inside border.

Bottom Border bottomborder - What color the 2 bottom-most pixels are. Options are 0 (no change), Border A (uses color defined in Border A), or Border B (uses color defined in Border B).

Bottom Border Inside bottomborderi - Same as above parameter but used for an inside border.

Top Border topborder - What color the 2 top-most pixels are. Options are 0 (no change), Border A (uses color defined in Border A), or Border B (uses color defined in Border B).

Top Border Inside topborderi - Same as above parameter but used for an inside border.


Parameters - Output Page

Comp Over Input compoverinput - Turning this On will composite the input with the image.

Operation operand - - Choose which composite operation is performed from this menu. Search the web for 'blend modes' for more detailed information on the effects of each type.

  • Add add - input1.rgba + input2.rgba
  • Atop atop - (input1.rgba * input2.a) + (input2.rgba * (1.0 - input1.a))
  • Average average - (input1.rgba + input2.rgba)/2
  • Brightest brightest -
  • Burn Color burncolor -
  • Burn Linear burnlinear -
  • Chroma Difference chromadifference -
  • Color color -
  • Darker Color darkercolor -
  • Difference difference - absoluteValue(input1.rgb - input2.rgb). Alpha always equals 1.0
  • Dimmest dimmest -
  • Divide divide - input1.rgba / input2.rgba
  • Dodge dodge -
  • Exclude exclude -
  • Freeze freeze -
  • Glow glow -
  • Hard Light hardlight -
  • Hard Mix hardmix -
  • Heat heat -
  • Hue hue -
  • Inside inside - input1.rgba * clamp(input2.a, 0.0, 1.0)
  • Inside Luminance insideluminance -
  • Inverse inverse -
  • Lighter Color lightercolor -
  • Luminance Difference luminancedifference -
  • Maximum maximum - max(input1.r, input2.r), max(input1.g, input2.g), max(input1.b, input2.b), max(input1.a, input2.a)
  • Minimum minimum - min(input1.r, input2.r), min(input1.g, input2.g), min(input1.b, input2.b), min(input1.a, input2.a)
  • Multiply multiply -
  • Negate negate -
  • Outside outside - input1.rgba * (1.0 - input2.a)
  • Outside Luminance outsideluminance -
  • Over over - (input2.rgba * (1.0 - input1.a)) + input1.rgba
  • Overlay overlay -
  • Pinlight pinlight -
  • Reflect reflect -
  • Screen screen - 1.0 - ((1.0 - input1.rgba) * (1.0 - input2.rgba))
  • Soft Light softlight -
  • Linear Light linearlight -
  • Stencil Luminance stencilluminance -
  • Subtract subtract - input1.rgba - input2.rgba
  • Subtractive subtractive -
  • Under under - (input1.rgba * (1.0 - input2.a)) + input2.rgba
  • Vivid Light vividlight -
  • Xor xor - (input1.rgba * (1.0 - input2.a)) + (input2.rgba * (1.0 - input1.a))
  • Y Film yfilm -
  • Z Film zfilm -

Swap Order swaporder - Swaps the order of the composite with the input.


Parameters - Common Page

Output Resolution outputresolution - - quickly change the resolution of the TOP's data.

  • Use Input useinput - Uses the input's resolution.
  • Eighth eighth - Multiply the input's resolution by that amount.
  • Quarter quarter - Multiply the input's resolution by that amount.
  • Half half - Multiply the input's resolution by that amount.
  • 2X 2x - Multiply the input's resolution by that amount.
  • 4X 4x - Multiply the input's resolution by that amount.
  • 8X 8x - Multiply the input's resolution by that amount.
  • Fit Resolution fit - Grow or shrink the input resolution to fit this resolution, while keeping the aspect ratio the same.
  • Limit Resolution limit - Limit the input resolution to be not larger than this resolution, while keeping the aspect ratio the same.
  • Custom Resolution custom - Directly control the width and height.

Resolution resolution - - Enabled only when the Resolution parameter is set to Custom Resolution. Some Generators like Constant and Ramp do not use inputs and only use this field to determine their size. The drop down menu on the right provides some commonly used resolutions.

  • W resolutionw -
  • H resolutionh -

Resolution Menu resmenu - A drop-down menu with some commonly used resolutions.

Use Global Res Multiplier resmult - Uses the Global Resolution Multiplier found in Edit>Preferences>TOPs. This multiplies all the TOPs resolutions by the set amount. This is handy when working on computers with different hardware specifications. If a project is designed on a desktop workstation with lots of graphics memory, a user on a laptop with only 64MB VRAM can set the Global Resolution Multiplier to a value of half or quarter so it runs at an acceptable speed. By checking this checkbox on, this TOP is affected by the global multiplier.

Output Aspect outputaspect - - Sets the image aspect ratio allowing any textures to be viewed in any size. Watch for unexpected results when compositing TOPs with different aspect ratios. (You can define images with non-square pixels using xres, yres, aspectx, aspecty where xres/yres != aspectx/aspecty.)

  • Use Input useinput - Uses the input's aspect ratio.
  • Resolution resolution - Uses the aspect of the image's defined resolution (ie 512x256 would be 2:1), whereby each pixel is square.
  • Custom Aspect custom - Lets you explicitly define a custom aspect ratio in the Aspect parameter below.

Aspect aspect - - Use when Output Aspect parameter is set to Custom Aspect.

  • Aspect1 aspect1 -
  • Aspect2 aspect2 -

Aspect Menu armenu - A drop-down menu with some commonly used aspect ratios.

Input Smoothness inputfiltertype - - This controls pixel filtering on the input image of the TOP.

  • Nearest Pixel nearest - Uses nearest pixel or accurate image representation. Images will look jaggy when viewing at any zoom level other than Native Resolution.
  • Interpolate Pixels linear - Uses linear filtering between pixels. This is how you get TOP images in viewers to look good at various zoom levels, especially useful when using any Fill Viewer setting other than Native Resolution.
  • Mipmap Pixels mipmap - Uses mipmap filtering when scaling images. This can be used to reduce artifacts and sparkling in moving/scaling images that have lots of detail.

Fill Viewer fillmode - - Determine how the TOP image is displayed in the viewer.

NOTE:To get an understanding of how TOPs work with images, you will want to set this to Native Resolution as you lay down TOPs when starting out. This will let you see what is actually happening without any automatic viewer resizing.

  • Use Input useinput - Uses the same Fill Viewer settings as it's input.
  • Fill fill - Stretches the image to fit the edges of the viewer.
  • Fit Horizontal width - Stretches image to fit viewer horizontally.
  • Fit Vertical height - Stretches image to fit viewer vertically.
  • Fit Best best - Stretches or squashes image so no part of image is cropped.
  • Fit Outside outside - Stretches or squashes image so image fills viewer while constraining it's proportions. This often leads to part of image getting cropped by viewer.
  • Native Resolution nativeres - Displays the native resolution of the image in the viewer.

Viewer Smoothness filtertype - - This controls pixel filtering in the viewers.

  • Nearest Pixel nearest - Uses nearest pixel or accurate image representation. Images will look jaggy when viewing at any zoom level other than Native Resolution.
  • Interpolate Pixels linear - Uses linear filtering between pixels. Use this to get TOP images in viewers to look good at various zoom levels, especially useful when using any Fill Viewer setting other than Native Resolution.
  • Mipmap Pixels mipmap - Uses mipmap filtering when scaling images. This can be used to reduce artifacts and sparkling in moving/scaling images that have lots of detail. When the input is 32-bit float format, only nearest filtering will be used (regardless of what is selected).

Passes npasses - Duplicates the operation of the TOP the specified number of times. For every pass after the first it takes the result of the previous pass and replaces the node's first input with the result of the previous pass. One exception to this is the GLSL TOP when using compute shaders, where the input will continue to be the connected TOP's image.

Channel Mask chanmask - Allows you to choose which channels (R, G, B, or A) the TOP will operate on. All channels are selected by default.

Pixel Format format - - Format used to store data for each channel in the image (ie. R, G, B, and A). Refer to Pixel Formats for more information.

  • Use Input useinput - Uses the input's pixel format.
  • 8-bit fixed (RGBA) rgba8fixed - Uses 8-bit integer values for each channel.
  • sRGB 8-bit fixed (RGBA) srgba8fixed - Uses 8-bit integer values for each channel and stores color in sRGB colorspace. Note that this does not apply an sRGB curve to the pixel values, it only stores them using an sRGB curve. This means more data is used for the darker values and less for the brighter values. When the values are read downstream they will be converted back to linear. For more information refer to sRGB.
  • 16-bit float (RGBA) rgba16float - Uses 16-bits per color channel, 64-bits per pixel.
  • 32-bit float (RGBA) rgba32float - Uses 32-bits per color channel, 128-bits per pixels.
  • 10-bit RGB, 2-bit Alpha, fixed (RGBA) rgb10a2fixed - Uses 10-bits per color channel and 2-bits for alpha, 32-bits total per pixel.
  • 16-bit fixed (RGBA) rgba16fixed - Uses 16-bits per color channel, 64-bits total per pixel.
  • 11-bit float (RGB), Positive Values Only rgba11float - A RGB floating point format that has 11 bits for the Red and Green channels, and 10-bits for the Blue Channel, 32-bits total per pixel (therefore the same memory usage as 8-bit RGBA). The Alpha channel in this format will always be 1. Values can go above one, but can't be negative. ie. the range is [0, infinite).
  • 16-bit float (RGB) rgb16float -
  • 32-bit float (RGB) rgb32float -
  • 8-bit fixed (Mono) mono8fixed - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 8-bits per pixel.
  • 16-bit fixed (Mono) mono16fixed - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 16-bits per pixel.
  • 16-bit float (Mono) mono16float - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 16-bits per pixel.
  • 32-bit float (Mono) mono32float - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 32-bits per pixel.
  • 8-bit fixed (RG) rg8fixed - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 8-bits per channel, 16-bits total per pixel.
  • 16-bit fixed (RG) rg16fixed - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 16-bits per channel, 32-bits total per pixel.
  • 16-bit float (RG) rg16float - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 16-bits per channel, 32-bits total per pixel.
  • 32-bit float (RG) rg32float - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 32-bits per channel, 64-bits total per pixel.
  • 8-bit fixed (A) a8fixed - An Alpha only format that has 8-bits per channel, 8-bits per pixel.
  • 16-bit fixed (A) a16fixed - An Alpha only format that has 16-bits per channel, 16-bits per pixel.
  • 16-bit float (A) a16float - An Alpha only format that has 16-bits per channel, 16-bits per pixel.
  • 32-bit float (A) a32float - An Alpha only format that has 32-bits per channel, 32-bits per pixel.
  • 8-bit fixed (Mono+Alpha) monoalpha8fixed - A 2 channel format, one value for RGB and one value for Alpha. 8-bits per channel, 16-bits per pixel.
  • 16-bit fixed (Mono+Alpha) monoalpha16fixed - A 2 channel format, one value for RGB and one value for Alpha. 16-bits per channel, 32-bits per pixel.
  • 16-bit float (Mono+Alpha) monoalpha16float - A 2 channel format, one value for RGB and one value for Alpha. 16-bits per channel, 32-bits per pixel.
  • 32-bit float (Mono+Alpha) monoalpha32float - A 2 channel format, one value for RGB and one value for Alpha. 32-bits per channel, 64-bits per pixel.


Operator Inputs

  • Input 0: Composite Input - Control the Composite operation via the parameters on the Output Page of this operator.


Info CHOP Channels

Extra Information for the Text TOP can be accessed via an Info CHOP.

Specific Text TOP Info Channels

  • text_width -
  • text_height -
  • cursor_start -
  • cursor_end -
  • cursor_x -
  • cursor_y -
  • cursor_width -
  • cursor_height -

Common TOP Info Channels

  • resx - Horizontal resolution of the TOP in pixels.
  • resy - Vertical resolution of the TOP in pixels.
  • aspectx - Horizontal aspect of the TOP.
  • aspecty - Vertical aspect of the TOP.
  • depth - Depth of 2D or 3D array if this TOP contains a 2D or 3D texture array.
  • gpu_memory_used - Total amount of texture memory used by this TOP.

Common Operator Info Channels

  • total_cooks - Number of times the operator has cooked since the process started.
  • cook_time - Duration of the last cook in milliseconds.
  • cook_frame - Frame number when this operator was last cooked relative to the component timeline.
  • cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
  • cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
  • cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
  • cooked_this_frame - 1 if operator was cooked this frame.
  • warnings - Number of warnings in this operator if any.
  • errors - Number of errors in this operator if any.


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