PocketMatrix

I am the new one to study edgelib. I do not know how to use the camera as the input.

I am using Windows desktop workstation and one camera. I am going to create a small game using the camera. Any example code? Thank you.

I can capture camera images now, but the type is char.
How can I copy them to the surface? Is it using the following?
ERESULT CreateSurface(E2DSurface *surface, void *imgmem, unsigned long memsize, unsigned long usetype = EST_DEFAULT)

If so, how can I get the memory size?

Thanks.

Thank you, Edge.

The data returned is a char *, and I do not have a pitch member. I have modified the code you gave to me.

The result is not what I expected. You can easily to see the difference between two images as below. The first image is the 320 X 240 (RGBA)which from the camera. The second one is from the program. They should be the same, but they are quite different.

According to the width, some parts are missing, and divided into 4 parts. Some of the height parts are still missing.








unsigned char *memptr = background.Lock(&info);
if (memptr)
{
unsigned long yctr;
for (yctr = 0; yctr <= (unsigned long)cparam.ysize; yctr++){
ClassEMemory::Copy(&memptr[yctr*info.width],&dataPtr[yctr*cparam.xsize],cparam.xsize*32/8);

}
background.Unlock();
}
DrawBackground(display);


cparam.ysize - height of the image (in pixels).
cparam.xsize - length of the image (in pixels).

I also find that info.width=256. info.height=256.
Therefore,the width is smaller than 320, and the height is larger than 240.

How can I fix such problem?

Thank you so much.

Hi Edge,

Thank you so much. I used the background image which is 256 X 256.
if (display->CreateSurface(&background, "background.jpg") != E_OK)
return (E_ERROR);

I changed it to
if (display->CreateSurface(&background, 320,240) != E_OK)
return(E_ERROR);

It works, is it correct? Do I need to modify some code in DrawBackground(ClassEDisplay *display)?
Because I am not quite understand this function.

void ClassMain::DrawBackground(ClassEDisplay *display)
{
#if defined(EGL_USEGL)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
display->Perspective2D(256, 256, false);
//display->Perspective2D(320, 240, false);
display->BltFast(0, 0, &background, NULL);
#else
E2DBLTFX bltfx;
bltfx.flags = 0;
bltfx.property = 0;
bltfx.xscale = 65536 * display->buffer.GetWidth() / background.GetWidth();
bltfx.yscale = 65536 * display->buffer.GetHeight() / background.GetHeight();
bltfx.rotation = 0;
bltfx.flipflags = 0;
display->buffer.BltFx(display->buffer.GetWidth() / 2, display->buffer.GetHeight() / 2, &background, NULL, &bltfx);
#endif
}


Thank you so much!