Abstract: A touch input is received on the touchscreen. The touch input comprises a stroke and is associated with variable opacity. The stroke is converted to a plurality of segments. The plurality of segments comprises a plurality of arc segments, line segments, or a combination. A plurality of stamps is generated corresponding to the plurality segments. Shading is applied to the stroke, where applying shading comprises varying at least one of a weight or an offset of at least one color associated with at least one pixel of at least one stamp of the plurality of stamps. The plurality of stamps is rendered on the touchscreen of the device to represent the stroke.

Abstract: Methods, systems, and devices are described herein for rendering and blending variable opacity ink strokes on a touchscreen device. In one aspect, blending variable opacity ink strokes may include receiving a touch input including a stroke associated with variable opacity, and converting the stroke to a plurality of segments, including arc segments, line segments, or a combination thereof. Next, a plurality of stamps corresponding to the plurality segments may be generated and combined with a static texture and a varying texture. The plurality of stamps may be rendered on the touchscreen of the device to represent the stroke. In another aspect, the received stroke may at least partially overlap other visual data. In this case, the stamps associated with the stroke may be blended with the other visual data using source-over blending The blended plurality of stamps may be rendered on the touchscreen of the device to represent the stroke.

Abstract: Methods, systems, and devices are described herein for rendering variable opacity ink strokes on a touchscreen device. In one aspect, a method for rendering variable opacity ink strokes includes receiving a touch input including a stroke associated with variable opacity on a touchscreen of a device. The stroke may be converted to at least one Bezier curve. The at least one Bezier curve may be smoothed and dividing into a plurality of segments, wherein the plurality of segments includes arc segments, line segments, or a combination thereof. A plurality of stamps may be generated corresponding to the plurality of segments. The plurality of stamps may be rendered on the touchscreen of the device to represent the stroke.

Abstract: In one example, a graphics processing unit may use an optimized geometric realization to render a text shape as a scalable geometry. The graphics processing unit may generate an inner geometry for a text shape. The graphics processing unit also may generate a tessellated edge geometry abutting the inner geometry for an edge of the text shape. The graphics processing unit further may assign a coverage gradient to the tessellated edge geometry to create an anti-aliased edge for the text shape.

Abstract: Methods, systems, and devices are described herein for rendering and blending variable opacity ink strokes on a touchscreen device. In one aspect, blending variable opacity ink strokes may include receiving a touch input including a stroke associated with variable opacity, and converting the stroke to a plurality of segments, including arc segments, line segments, or a combination thereof. Next, a plurality of stamps corresponding to the plurality segments may be generated and combined with a static texture and a varying texture. The plurality of stamps may be rendered on the touchscreen of the device to represent the stroke. In another aspect, the received stroke may at least partially overlap other visual data. In this case, the stamps associated with the stroke may be blended with the other visual data using source-over blending The blended plurality of stamps may be rendered on the touchscreen of the device to represent the stroke.

Abstract: Methods, systems, and devices are described herein for rendering variable opacity ink strokes on a touchscreen device. In one aspect, a method for rendering variable opacity ink strokes includes receiving a touch input including a stroke associated with variable opacity on a touchscreen of a device. The stroke may be converted to at least one Bezier curve. The at least one Bezier curve may be smoothed and dividing into a plurality of segments, wherein the plurality of segments includes arc segments, line segments, or a combination thereof. A plurality of stamps may be generated corresponding to the plurality of segments. The plurality of stamps may be rendered on the touchscreen of the device to represent the stroke.

Abstract: A touch input is received on the touchscreen. The touch input comprises a stroke and is associated with variable opacity. The stroke is converted to a plurality of segments. The plurality of segments comprises a plurality of arc segments, line segments, or a combination. A plurality of stamps is generated corresponding to the plurality segments. Shading is applied to the stroke, where applying shading comprises varying at least one of a weight or an offset of at least one color associated with at least one pixel of at least one stamp of the plurality of stamps. The plurality of stamps is rendered on the touchscreen of the device to represent the stroke.

Abstract: Systems, methods, and computer-readable storage media are provided for efficient real-time ink stroke smoothing, trajectory prediction, and GPU-leveraged rendering of ink stroke input. First and second ink points are received and an active Bézier approximation is computed based thereupon. Sequentially later in time that the first and second ink points, a third ink point is received. It is determined whether the third ink point adequately fits the active Bézier approximation. Where it is determined that the third ink point adequately fits, an updated active Bézier approximation is computed that includes the first, second and third ink points. Where it is determined that the third ink point fails to adequately fit, a different new Bézier approximation is computed that includes the third ink point but not the first and second ink points. Leveraging a GPU, a smoothed ink stroke based upon the Bézier approximation(s) is rendered.

Abstract: Systems, methods, and computer-readable storage media are provided for efficient real-time ink stroke smoothing, trajectory prediction, and GPU-leveraged rendering of ink stroke input. First and second ink points are received and an active Bézier approximation is computed based thereupon. Sequentially later in time that the first and second ink points, a third ink point is received. It is determined whether the third ink point adequately fits the active Bézier approximation. Where it is determined that the third ink point adequately fits, an updated active Bézier approximation is computed that includes the first, second and third ink points. Where it is determined that the third ink point fails to adequately fit, a different new Bézier approximation is computed that includes the third ink point but not the first and second ink points. Leveraging a GPU, a smoothed ink stroke based upon the Bézier approximation(s) is rendered.

Abstract: Systems, methods, and computer-readable storage media are provided for efficient real-time ink stroke smoothing, trajectory prediction, and GPU-leveraged rendering of ink stroke input. First and second ink points are received and an active Bézier approximation is computed based thereupon. Sequentially later in time that the first and second ink points, a third ink point is received. It is determined whether the third ink point adequately fits the active Bézier approximation. Where it is determined that the third ink point adequately fits, an updated active Bézier approximation is computed that includes the first, second and third ink points. Where it is determined that the third ink point fails to adequately fit, a different new Bézier approximation is computed that includes the third ink point but not the first and second ink points. Leveraging a GPU, a smoothed ink stroke based upon the Bézier approximation(s) is rendered.

Abstract: Methods, systems, and computer-storage media for efficiently tessellating two dimensional (2-D) curves using a graphics pipeline running on a graphics processing unit (GPU) are provided. A central processing unit (CPU) converts a geometry having one or more 2-D curves into an intermediate tessellation having at least one Bezier fan with a fan origin and four control points. The intermediate tessellation is sent on to the graphics pipeline. A hull shader in the graphics pipeline is configured to approximate the Bezier fan curve by subdividing the curve into a defined number of triangles based on a maximum value of a width or a height of a bounding box containing the four control points of the Bezier fan. A domain shader in the graphics pipeline is configured to determine a vertex position for each of the defined triangles along the curve of the Bezier fan.

Abstract: Techniques for anti-aliasing for geometries are described. In at least some embodiments, a graphical image is reduced to a collection of polygonal geometric primitives (“geometries”). The individual geometries are processed according to techniques discussed herein such that anti-aliasing is applied to the geometries when the geometries are displayed as part of the graphical image. For example, anti-aliasing of a general-purpose geometry is achieved via an associated collection of quadrilaterals and bevels that can be dynamically transformed when the geometry is rendered for display. In at least some embodiments, quadrilaterals and bevels generated for a geometry enable the geometry to be dynamically transformed and re-rendered multiple times to achieve a variety of visuals.

Abstract: Systems, methods, and computer-readable storage media are provided for efficient real-time ink stroke smoothing, trajectory prediction, and GPU-leveraged rendering of ink stroke input. First and second ink points are received and an active Bézier approximation is computed based thereupon. Sequentially later in time that the first and second ink points, a third ink point is received. It is determined whether the third ink point adequately fits the active Bézier approximation. Where it is determined that the third ink point adequately fits, an updated active Bézier approximation is computed that includes the first, second and third ink points. Where it is determined that the third ink point fails to adequately fit, a different new Bézier approximation is computed that includes the third ink point but not the first and second ink points. Leveraging a GPU, a smoothed ink stroke based upon the Bézier approximation(s) is rendered.

Abstract: In one example, a graphics processing unit may use an optimized geometric realization to render a text shape as a scalable geometry. The graphics processing unit may generate an inner geometry for a text shape. The graphics processing unit also may generate a tessellated edge geometry abutting the inner geometry for an edge of the text shape. The graphics processing unit further may assign a coverage gradient to the tessellated edge geometry to create an anti-aliased edge for the text shape.

Abstract: Systems and methods are provided for improved filtering and correcting of glyphs on a GPU. The computational intensity required for filtering and/or rendering can be reduced by pre-calculating some or all of the calculations needed for converting coverage data into corrected pixel values. Additional efficiencies may be realized in some embodiments by transferring data from a CPU to a GPU in an improved format. The improvements can be realized in a variety of graphics formats.

Abstract: Methods, systems, and computer-storage media for efficiently tessellating two dimensional (2-D) curves using a graphics pipeline running on a graphics processing unit (GPU) are provided. A central processing unit (CPU) converts a geometry having one or more 2-D curves into an intermediate tessellation having at least one Bezier fan with a fan origin and four control points. The intermediate tessellation is sent on to the graphics pipeline. A hull shader in the graphics pipeline is configured to approximate the Bezier fan curve by subdividing the curve into a defined number of triangles based on a maximum value of a width or a height of a bounding box containing the four control points of the Bezier fan. A domain shader in the graphics pipeline is configured to determine a vertex position for each of the defined triangles along the curve of the Bezier fan.

Abstract: A system, a method and computer-readable media for rendering text with a graphics processing unit (GPU). The system, method, and media includes a GPU that may be configured to receive a plurality of compressed glyph bitmap and create a plurality of glyph textures from the bitmap. The GPU may be further configured to pack a plurality of rows of data from a glyph bitmap into a single row of a glyph texture. The GPU may be also be configured to merge the plurality of glyph textures into a merged texture to identify overlapping rows of color. Additionally, the GPU maybe configured to filter the merged texture to create a grayscale texture containing a plurality of merged glyphs and rendering the grayscale texture to display the plurality of merged glyphs.

Abstract: Systems and methods are provided for improved filtering and correcting of glyphs on a GPU. The computational intensity required for filtering and/or rendering can be reduced by pre-calculating some or all of the calculations needed for converting coverage data into corrected pixel values. Additional efficiencies may be realized in some embodiments by transferring data from a CPU to a GPU in an improved format. The improvements can be realized in a variety of graphics formats.

Abstract: A system, a method and computer-readable media for rendering text with a graphics processing unit (GPU). The system, method, and media includes a GPU that may be configured to receive a plurality of compressed glyph bitmap and create a plurality of glyph textures from the bitmap. The GPU may be further configured to pack a plurality of rows of data from a glyph bitmap into a single row of a glyph texture. The GPU may be also be configured to merge the plurality of glyph textures into a merged texture to identify overlapping rows of color. Additionally, the GPU maybe configured to filter the merged texture to create a grayscale texture containing a plurality of merged glyphs and rendering the grayscale texture to display the plurality of merged glyphs.

Abstract: An improved system and method for an extensible codec architecture for digital images is provided. Executable software code may be operably coupled to a codec manager for requesting imaging operations to be performed on a digital image. The codec manager may receive the request to perform an imaging operation on the digital image and may select an imaging component, such as a codec, from one or more imaging components registered in the computer system for performing an imaging operation on the digital image. An arbitration manager may include functionality for requesting enumeration of the operations an imaging component may perform on a particular digital image. One or more pixel format converters may then convert the pixel format in the digital image to a pixel format supported by an imaging component installed on the system.