Recent questions tagged graphics

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graphics - display values in stacked lattice barchart

I want to display the values of a 100% bar for each part of it. Unfortunately I don't know how to do it. The graph ... .columns = 0.1, adj = 1)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Set individual pixels in .NET Format16bppGrayScale image

I'm trying to render a small Bitmap in memory with .NET that needs to be 16 bit Grayscale. The bitmap's ... value when drawing to my bitmap? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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472 views

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graphics - display values in stacked lattice barchart

I want to display the values of a 100% bar for each part of it. Unfortunately I don't know how to do it. The graph ... .columns = 0.1, adj = 1)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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469 views

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graphics - Set individual pixels in .NET Format16bppGrayScale image

I'm trying to render a small Bitmap in memory with .NET that needs to be 16 bit Grayscale. The bitmap's ... value when drawing to my bitmap? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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503 views

1 answer

graphics - display values in stacked lattice barchart

I want to display the values of a 100% bar for each part of it. Unfortunately I don't know how to do it. The graph ... .columns = 0.1, adj = 1)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

467 views

1 answer

graphics - Set individual pixels in .NET Format16bppGrayScale image

I'm trying to render a small Bitmap in memory with .NET that needs to be 16 bit Grayscale. The bitmap's ... value when drawing to my bitmap? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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489 views

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graphics - Dirty Rectangles

Where may one find references on implementing an algorithm for calculating a "dirty rectangle" for minimizing frame ... to update the display. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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544 views

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graphics - How to approximate a half-cosine curve with bezier paths in SVG?

Suppose I want to approximate a half-cosine curve in SVG using bezier paths. The half cosine should look like ... end after the second point. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Using SVG for additive color mixing (additive blending)

Coming from a graphic design background I know how to cheat to create an effect of additive color. The same basic ... let me give it a whirl. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Can a JPEG compressed image be rotated without a loss in quality?

JPEG is a lossy compression scheme, so decompression-manipulation-recompression normally reduces the image quality further for ... which don't? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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630 views

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graphics - What is the difference between Phong Shading and Gouraud Shading?

As I understand it, Gouraud shading calculates light color for each vertex and does interpolation on that color, ... wrong with my derivations? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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graphics - Spline, B-Spline and NURBS C++ library

Does anyone know of a library or set of classes for splines - specifically b-splines and NURBS (optional). A ... useful for me at the moment. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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graphics - Create Editable plots from R

I'm creating a series of plots in R (I'm using ggplot2, but that's not essential) and I want to be able ... ", "jitter")) testplot Thanks Paul. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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graphics - bezier path widening

I have a bezier curve B with points S, C1, C2, E, and a positive number w representing width. Is there a way of ... (I'm not sure if they are). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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graphics - Custom Heat Map in R

I need to create custom heat map as illustrated in the attached figure. It is different from a conventional ... option compared to the other. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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graphics - How to blit() in android?

I'm used to handle graphics with old-school libraries (allegro, GD, pygame), where if I want to copy a part of a ... into B, and then B into C? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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505 views

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graphics - How do I calculate a four colour gradient?

If I have four colours (A, B, C & D) on four corners of a square and I want to fill that square ... colours http://rabien.com/image/colours.png See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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431 views

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graphics - Algorithm for fast Drop shadow in GDI+

What is an efficient way to add a drop-shadow to an image in GDI? Right now i start with my image: i use ImageAttributes and a ... y: Integer; // r, g, b, a: Single; //summed...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

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graphics - Android SurfaceFlinger

I would just like to ask if SurfaceFlinger is always called for any type of drawing into the screen? Example, ... JPG file to the screen. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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774 views

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graphics - Scale & rotate Bitmap using Matrix in Android

I'm trying to scale and rotate in single operation before creting the final bitmap but the preRotate, postConcat ... scale and not rotation. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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458 views

1 answer

graphics - How do I use an animated .gif in my iPhone application?

I have an animated gif file that I want to use in my iPhone application, but the animation doesn't work. Does anybody know how to fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

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graphics - What are Vertex and Pixel shaders?

What are Vertex and Pixel shaders? What is the difference between them? Which one is the best? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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348 views

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graphics - What are the practical differences when working with colors in a linear vs. a non-linear RGB space?

What is the basic property of a linear RGB space and what is the fundamental property of a non-linear one? ... linear for what i understand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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453 views

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graphics - Draw tbitmap with scale and alpha channel faster

The following code copies a large bitmap blends it with the correct background and then draws a semi transparent image ... ,int(obj[index])); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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511 views

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graphics - Java BasicStroke "Fuzzy"

I'm trying to write a simple paint applet with Java, but I'm having trouble with BasicStroke. Initially, my plan ... repaint(); start = end; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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381 views

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graphics - Android:Crash: Binary XML file line : Error inflating class (using SurfaceView)

I'm having android surfaceView and in that I'm trying to add buttons to this. In the surfaceView canvas I draw ... ...I'm stuck with this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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549 views

1 answer

graphics - Adding text to a bitmap in memory in Android

I'm trying to take a bitmap from resources, add a text message to it and return it to the caller of the ... step or is there a better method? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

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graphics - How to delete a drawn circle in c# windows form?

I have drawn a circle in windows form Pen pen = new Pen(Color.Black, 3); Graphics gr = this.CreateGraphics(); gr. ... ,20); How to delete it... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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