Table of Contents
Updated
Over the past week, some readers have reported that they have encountered Win32 drawing gradient.
- 2 minutes to read.
Syntax
BOOL GradientFill ( HDC-HDD, PTRIVERTEX pVertex, ULONG nVertex, PVOID-pMesh, ULONG nMesh, ULONG ulMode);
Parameters
Pointer to an array associated with TRIVERTEX whose structures determine the best vertex.
Matrix structure GRADIENT_TRIANGLE in triangle technique or structure of matrix GRADIENT_RECT in rectangle mode.
Gradient fill mode. This parameter can have one of the following values.
| value | Value |
|---|---|
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In this mode, double ends describe a rectangle. A particular rectangle usually has a constant color (indicated by the TRIVERTEX structure) for the left and / or right edges. GDI interpolates the color from outside the left edge to the right edge and fills from the inside. |
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In this mode, the ends of the pairs describe a rectangle. The rectangle is indeed defined so that it has a constant (solid color,given by structure TRIVERTEX ) for perfect edge and bottom edge. GDI interpolates color from top to bottom to fill the interior. |
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In this state, one of the array structures TRIVERTEX with a list of array indices describing individual triangles is discarded to GDI. Linear GDI interpolates between the vertices of the triangles and therefore fills the interior. Rendering is fast at 24 and 32 bits per pixel. Dithering is literally done in 16, 8, 4 and 1 bit per pixel modes. |
Returned Value
To give the triangle a soft tint, call the GradientFill function at each of the three ends of the triangle. GDI will also linearly interpolate the triangle. Here is the exact result of drawing the shaded triangle.
To just try and add a soft shade to the attractive rectangle,Gradient fill in the upper left and lower right coordinates of the rectangle. There are two shading methods you can use to draw a rectangle. In flat mode, straightThe circle is shaded from left to right. In vertical mode, the rectangle is shaded from top to bottom. Here is the result of drawing two filled rectangles, one in horizontal mode and the other in catalog mode:
vGradient fill The function uses the grid method to mark the ends of the object when you need to draw. All the peaks have been passed, you canGradient fill doespeak Deploy. vpMesh The parameter specifies how the vertices that make up the object are connected. When you fill the rectangle completelypMesh points to the array associated with GRADIENT_RECT Structures. EverythingGRADIENT_RECT The structure defines one of the two vertices inpeak Zoned. These two corner points form the top-left edge as well as the bottom-right edge of the rectangle.
In an awkward position while filling in the triangle, pMesh points to an array of GRADIENT_TRIANGLE structures. Each GRADIENT_TRIANGLE structure defines a three-vertex index in the pVertex array. These vertices form a triangle.
To simplify hardware at this speed, no procedure is required to get inside the triangle Pixel precision.
Note. GradientFill cannot use the alpha element of a specific TRIVERTEX structure. To use a GradientFill with an opening, call GradientFill and then call AlphaBlend to get the desired values for the youtube alpha channel of each vertex.
For more information, see Smooth Shading , Draw Shaded Triangle , and Draw Shaded Rectangle .
Requirements
| Client supported at least | Windows 2000 Professional [Desktop Only] |
| Minimum number of applications supported on the server | Windows 2000 Server [desktop applications only] |
| Target Platform | Windows |
| Title | wingdi.h (including Windows.h) |
| Library | Msimg32.lib |
| DLL | Msimg32.dll |
See Also
Presentation
Creating a gradient as a background is far from impossible. If you’ve read Nishant’s article on using gradients with MFC, this code is justan SDK-optimized version of his article.
We Are Going Into The Abyss
- Using color gradients as backgrounds for dialogs and views
After that, you can simply understand how it was done. First, enter the message WM_ERASEBKGND into the window function. I suggest creating a separate target to do all the background painting work. If these are the ones you choose to use, pass the handle to your main window in the function declaration. Having said that, now let’s move on to most of the code.
Are you tired of your computer running slow? Annoyed by frustrating error messages? ASR Pro is the solution for you! Our recommended tool will quickly diagnose and repair Windows issues while dramatically increasing system performance. So don't wait any longer, download ASR Pro today! And one last, final note, it was not difficult, was it? Making a gradient is really easy. Even though you have a second function to create the slope, you can simply call the layout when the slope should be displayed. Even with slight variations, you can easily make the gradient just part of the window. That’s almost all … Articles There is no explicit license associated with this, but there may be jargon in the text of the article or in the recovery files themselves. If in doubt, connect the author using the chat below. You can probably find here a list of licenses that authors can use. Come Risolvere I Problemi Relativi Al Gradiente Di Disegno Di Win32? Updated
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