private static void MakeFontTexture(GR gr)
{
byte[] rgbaBuffer = new byte[128 * 128 * 4];
// fill in buffer with RGBA version of font pixels
byte val = (byte)0;
int k = 0;
for (int j = 0; j < 128; j++)
{
for (int i = 0; i < 128; i++)
{
k = 4 * ((128 * (127 - j)) + i);
val = Courier10FontBitmap[(16 * j) + (i >> 3)];
val <<= (i & 0x7); // 0..7
if (0 != (val & 0x80))
{
// opaque white
rgbaBuffer[k + 0] = 255; // R
rgbaBuffer[k + 1] = 255; // G
rgbaBuffer[k + 2] = 255; // B
rgbaBuffer[k + 3] = 255; // A
}
else
{
// transparent
rgbaBuffer[k + 0] = 0; // R
rgbaBuffer[k + 1] = 0; // G
rgbaBuffer[k + 2] = 0; // B
rgbaBuffer[k + 3] = 0; // A
}
}
}
// create an OpenGL texture and transfer data to the texture
int[] temp = new int[1];
gr.glGenTextures(1, temp);
mFontTextureName = temp[0];
gr.glBindTexture(GR.GL_TEXTURE_2D, mFontTextureName);
gr.glTexParameteri(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_MAG_FILTER, GR.GL_NEAREST);
gr.glTexParameteri(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_MIN_FILTER, GR.GL_NEAREST);
gr.glTexImage2D(GR.GL_TEXTURE_2D, 0, GR.GL_RGBA, 128, 128, 0, GR.GL_RGBA, GR.GL_UNSIGNED_BYTE, rgbaBuffer);
}
Initialize
(
GR gr,
IntPtr hwndParentWindow
)
{
this.Clear( );
// Cache the GR instance
this.mGR = gr;
this.mTextureDataBGR256x256 = new byte[(256 * (256 * 3))];
this.mSTVideoCapture = new STVideoCapture();
int capturePeriodMilliseconds = 33; // 33 milliseconds --> 30 frames per second (max)
// Attempt to initialize video capture
bool videoCaptureInitializationResult = false;
videoCaptureInitializationResult =
this.mSTVideoCapture.Initialize
(
hwndParentWindow,
STVideoCapture.STVideoCaptureFormat.BGR320x240,
capturePeriodMilliseconds,
new STVideoCapture.DelegateClientCaptureCallback(this.ClientCaptureCallback)
);
if (false == videoCaptureInitializationResult)
{
return(false);
}
// Create OpenGL texture object
int[] temp = new int[1];
gr.glGenTextures(1, temp);
this.mTextureOpenGLHandleBGR256x256 = temp[0];
// Fill the OpenGL texture with initial data
gr.glBindTexture
(
GR.GL_TEXTURE_2D,
this.mTextureOpenGLHandleBGR256x256
);
gr.glTexImage2D
(
GR.GL_TEXTURE_2D,
0,
3,
256,
256,
0,
GR.GL_BGR_EXT,
GR.GL_UNSIGNED_BYTE,
this.mTextureDataBGR256x256
);
// Set texture mapping mode and filtering modes
gr.glTexParameteri(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_WRAP_S, GR.GL_REPEAT);
gr.glTexParameteri(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_WRAP_T, GR.GL_REPEAT);
gr.glTexParameterf(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_MIN_FILTER, GR.GL_LINEAR);
gr.glTexParameterf(GR.GL_TEXTURE_2D, GR.GL_TEXTURE_MAG_FILTER, GR.GL_LINEAR);
// deselect the current texture
gr.glBindTexture(GR.GL_TEXTURE_2D, 0);
return(true);
}
