In some cases, your computer may display a message stating that it is displaying Win32 Draw Gradient. There can be several reasons for this problem.
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Syntax
BOOL GradientFill ( [in] HDC-HDD, [in] PTRIVERTEX pVertex, [in] ULONG nVertex, [in] PVOID-pMesh, [in] ULONG nMesh, [in] ULONG ulMode);
Parameters
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A to denote a range of TRIVERTEX structures, each of which defines a vertex.
Array of gradient_triangle structures in triangle mode or multiple GRADIENT_RECT structures in rectangular mode.
Gradient fill mode. This parameter is likely one of the following values.
| value | Value |
|---|---|
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In this mode, some endpoints describe a rectangle. Your stream rectangle is set to a robust color (denoted by the TRIVERTEX structure) to preserve the left and right perimeter. GDI interpolates color from the accessible edge to the right edge and fills the interior. |
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In this technique, two endpoints describe a rectangle. The rectangle is defined so that it has a constant (the color specified in the entire structure е TRIVERTEX ) for the top and bottom positional edges. GDI interpolates the color between the top and bottom edges to fill the interior. |
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By its structure, an array of clusters TRIVERTEX is passed to GDI, which contains a list of array indices describing individual triangles. GDI performs linear interpolation between the vertices of the triangles and fills in the interior. Rendering is done specifically at 24 and 32 bits per pixel. Dithering is performed in 16, 8, iv and 1 bit per pixel modes. |
Return Value
Typically, to add nice shading to a triangle, you call the GradientFill function with three triangular ends. GDI linearly interpolates and fills the triangle. Here is the result of drawing the pigmented triangle as a whole.
To add soft shading to a contact with a rectangle,Gradient fill with coordinates in the upper left corner, but also in the lower right corner of the rectangle. When drawing a rectangle, two shading modes are used. For horizontal volumesThis rectangle is shaded from left to right. In vertical mode, the rectangle can be painted from top to bottom. Here is the main output drawing of two colored rectangles – one in horizontal mode, the other in vertical mode:
vGradient fill part uses a grid method to define the ends of an object that you can draw. All peaks passedGradient fill doespeak Deploy.Pmesh a new parameter determines how the vertices connect to form an item. I’m having problems filling a rectanglepMesh a number of GRADIENT_RECT Envelope. EverythingGRADIENT_RECT defines the structure of the database of two vertices in oftenpeak Deploy. These two vertices form the actual boundaries at the upper left and lower right corners of the rectangle.
For a content triangle, pMesh points to a set of GRADIENT_TRIANGLE structures. Each starting point of GRADIENT_TRIANGLE defines a pair of vertex indices in the pVertex array. These garden peaks in the backyard form a triangle.
To facilitate hardware acceleration, this routine does not have to be pixel-to-triangle perfectlinen interior.
Note that GradientFill does not use the alpha element of its TRIVERTEX structure. To use a GradientFill with an aperture, call GradientFill, then talk to AlphaBlend with the values you want to use for the actual alpha channel of each vertex.
For more information, see Fade Shaded , Draw a Real Shaded Triangle , and Draw a Shaded Rectangle .
Requirements
| Minimum Client | Supported Windows 2000 Professional [desktop applications only] |
| Minimum Supported Server | Windows 2000 Server [desktop applications only] |
| Target Platform | Windows |
| Title | wingdi.h (including Windows.h) |
| Library | Msimg32.lib |
| DLL | Msimg32.dll |
See Also
- Read 2 minutes
Presentation
It’s easy to create a gradient for the background. If you’ve read Nishant’s article on gradients in the context of MFC, uhthat code is basically a modified version of the SDK of his article.
We’re Going Into The Abyss
- Use colors as background with color gradients in dialog boxes and views
After that, you should certainly have a simple idea of how this gem was made. For easy customization, add the message WM_ERASEBKGND to your personal window procedure function. I suggest creating a separate function that will do almost all of the background painting work. In any case, if you decide to go in that direction, be sure to include the amount of work you are going to spend on the pen if you want to access your main window. Suppose now to the code.
And a final note, maybe it was easy, right? Making a gradient is really easy. Also, if you take a second to create the gradient, you can simply call the function whenever you want the gradient to appear. Even with a little tweak, you can usually only set the gradient on a portion of your window. These are all people … This article does not provide an explicit license for the device, but may contain terms of use for the text of the article or the files themselves. If you are not making a purchase, please contact the author through the dispute resolution forum below. A list of licenses that internet marketers can use is available here. License
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