Loading/Creating an image into SharpDX in a .NET program -

-

i'm trying use sharpdx create simple maze-like 2d program using directx.

to end want create bitmaps can render on-screen walls, hallways, outside of maze, etc.

however, can't seem figure out how either load existing image file bitmap class in sharpdx library, or how create new such bitmap class scratch.

since classes said mapped directly directx types, guess means need learn more directx, hoping there simple example somewhere show me need do.

if have construct new bitmap scratch , draw it, can that, it's not difficult getting pixels need right, can't seem figure out part.

does have experience sharpdx library , can give me pointers?

you should ask directly question "issue" tab on sharpdx project, able give quick response there (you lucky i'm checking usage net ;) ). if asking officially, make improvement library , keep record of request in issue database.

concerning particular issue, it's not clear kind of directx api using. assume using direct2d?

if yes, there no api load directly sharpdx.direct2d1.bitmap file (i add method api). have uploaded bitmap sample performing this.

/// <summary> /// loads direct2d bitmap file using system.drawing.image.fromfile(...) /// </summary> /// <param name="rendertarget">the render target.</param> /// <param name="file">the file.</param> /// <returns>a d2d1 bitmap</returns> public static bitmap loadfromfile(rendertarget rendertarget, string file) {     // loads file using system.drawing.image     using (var bitmap = (system.drawing.bitmap)system.drawing.image.fromfile(file))     {         var sourcearea = new system.drawing.rectangle(0, 0, bitmap.width, bitmap.height);         var bitmapproperties = new bitmapproperties(new pixelformat(format.r8g8b8a8_unorm, alphamode.premultiplied));         var size = new system.drawing.size(bitmap.width, bitmap.height);          // transform pixels bgra rgba         int stride = bitmap.width * sizeof(int);         using (var tempstream = new datastream(bitmap.height * stride, true, true))         {             // lock system.drawing.bitmap             var bitmapdata = bitmap.lockbits(sourcearea, imagelockmode.readonly, system.drawing.imaging.pixelformat.format32bpppargb);              // convert pixels              (int y = 0; y < bitmap.height; y++)             {                 int offset = bitmapdata.stride*y;                 (int x = 0; x < bitmap.width; x++)                 {                     // not optimized                      byte b = marshal.readbyte(bitmapdata.scan0, offset++);                     byte g = marshal.readbyte(bitmapdata.scan0, offset++);                     byte r = marshal.readbyte(bitmapdata.scan0, offset++);                     byte = marshal.readbyte(bitmapdata.scan0, offset++);                     int rgba = r | (g << 8) | (b << 16) | (a << 24);                     tempstream.write(rgba);                 }              }             bitmap.unlockbits(bitmapdata);             tempstream.position = 0;              return new bitmap(rendertarget, size, tempstream, stride, bitmapproperties);         }     } }

as said, sharpdx giving access raw-low-level directx api (unlike example xna giving higher level api), need understand how program raw directx in order use sharpdx.


Comments

Post a Comment

Popular posts from this blog

c# - How to set Z index when using WPF DrawingContext? -

-
how set z-index drawing object when using drawingcontext.drawxxx() methods? the object drawn last have higher z index. can't change index of drawn objects. way draw in order. if using wpf (as placed tag), can use, example, canvas control. create shapes need like polyline obj = new polyline(); //... // ... set properties of obj and add them canvas uielementcollection: yourcanvasname.children.add(obj); //or yourcanvasname.children.insert(i, obj); first items of collection have higher z index. advantages in way: no need redraw on window changes, can anytime move objects , change order.
Read more

razor - Is this a bug in WebMatrix PageData? -

-
i think may have found bug in webmatrix's pagedata, not sure. concerns how pass data partial page calling page. in webmatrix documentation (tutorials, e.g. " 3 - creating consistent look ", , example code), pagedata recommended mechanism pass data between pages (e.g. content page layout page, or partial page). however have found not work other way, pass data partial page calling page. modifying or adding entries in pagedata in partial page, not seem calling page. cutting right down simplest possible example, in test page may have this: @{ pagedata["test"] = "initial entry"; } <p>before calling partial page, test value @pagedata["test"]</p> @renderpage("_testpartial.cshtml") <p>after returning calling page, test value @pagedata["test"]</p> and in _testpartial.cshtml page might have this: @{ pagedata["test"] = "modified entry"; } <p>in partial page...
Read more

visual c++ - Using relative values in array sorting ( asm ) -

-
i need sort through array , sort each individual row in array in ascending order. doesn't seem going (surprise!) keep getting hit 2 errors: a2101: cannot add 2 relocatable labels , a2026: constant expected here's sort, makes sense me, think i'm still trying implement high-lvl language techniqes assembly. there way around not being able use relative values? (the array 7 rows 9 columns, btw). mov cx, 7; cx = number of rows outer: ; outer loop walk through rows push cx mov cx, 9 mov row, cx ;rows middle: ; middle-loop walk through columns push cx sub cx, 1 ;cx = cx-1 mov column, cx ;columns inner: ;inner loop - compare , exchange column values cmp marray[row*9 + column], marray[row*9 + column+1] xchg marray[row*9 + column+1], marray[row*9 + column] ; compare , exchange values marray table inc column loop inner pop cx loop mid...
Read more