image_impl::image_impl(unsigned pWidth, unsigned pHeight,
fg::ChannelFormat pFormat, fg::dtype pDataType)
: mWidth(pWidth), mHeight(pHeight),
mFormat(pFormat), mGLformat(gl_ctype(mFormat)), mGLiformat(gl_ictype(mFormat)),
mDataType(pDataType), mGLType(gl_dtype(mDataType))
{
CheckGL("Begin image_impl::image_impl");
// Initialize OpenGL Items
glGenTextures(1, &(mTex));
glBindTexture(GL_TEXTURE_2D, mTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, mGLiformat, mWidth, mHeight, 0, mGLformat, mGLType, NULL);
CheckGL("Before PBO Initialization");
glGenBuffers(1, &mPBO);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, mPBO);
size_t typeSize = 0;
switch(mGLType) {
case GL_INT: typeSize = sizeof(int ); break;
case GL_UNSIGNED_INT: typeSize = sizeof(unsigned int); break;
case GL_SHORT: typeSize = sizeof(short ); break;
case GL_UNSIGNED_SHORT: typeSize = sizeof(unsigned short); break;
case GL_BYTE: typeSize = sizeof(char ); break;
case GL_UNSIGNED_BYTE: typeSize = sizeof(unsigned char); break;
default: typeSize = sizeof(float); break;
}
size_t formatSize = 0;
switch(mFormat) {
case fg::FG_GRAYSCALE: formatSize = 1; break;
case fg::FG_RG: formatSize = 2; break;
case fg::FG_RGB: formatSize = 3; break;
case fg::FG_BGR: formatSize = 3; break;
case fg::FG_RGBA: formatSize = 4; break;
case fg::FG_BGRA: formatSize = 4; break;
default: formatSize = 1; break;
}
mPBOsize = mWidth * mHeight * formatSize * typeSize;
glBufferData(GL_PIXEL_UNPACK_BUFFER, mPBOsize, NULL, GL_STREAM_COPY);
glBindTexture(GL_TEXTURE_2D, 0);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
CheckGL("After PBO Initialization");
mProgram = initShaders(vertex_shader_code, fragment_shader_code);
CheckGL("End image_impl::image_impl");
}
hist_impl::hist_impl(unsigned pNBins, fg::dtype pDataType)
: Chart2D(), mDataType(pDataType), mGLType(gl_dtype(mDataType)),
mNBins(pNBins), mHistogramVBO(0), mHistogramVBOSize(0), mHistBarProgram(0),
mHistBarMatIndex(0), mHistBarColorIndex(0), mHistBarYMaxIndex(0),
mPointIndex(0), mFreqIndex(0)
{
CheckGL("Begin hist_impl::hist_impl");
mHistBarProgram = initShaders(gHistBarVertexShaderSrc, gHistBarFragmentShaderSrc);
mPointIndex = glGetAttribLocation (mHistBarProgram, "point");
mFreqIndex = glGetAttribLocation (mHistBarProgram, "freq");
mHistBarColorIndex = glGetUniformLocation(mHistBarProgram, "barColor");
mHistBarMatIndex = glGetUniformLocation(mHistBarProgram, "transform");
mHistBarNBinsIndex = glGetUniformLocation(mHistBarProgram, "nbins");
mHistBarYMaxIndex = glGetUniformLocation(mHistBarProgram, "ymax");
switch(mGLType) {
case GL_FLOAT:
mHistogramVBO = createBuffer<float>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(float);
break;
case GL_INT:
mHistogramVBO = createBuffer<int>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(int);
break;
case GL_UNSIGNED_INT:
mHistogramVBO = createBuffer<unsigned>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(unsigned);
break;
case GL_SHORT:
mHistogramVBO = createBuffer<short>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(short);
break;
case GL_UNSIGNED_SHORT:
mHistogramVBO = createBuffer<unsigned short>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(unsigned short);
break;
case GL_UNSIGNED_BYTE:
mHistogramVBO = createBuffer<unsigned char>(GL_ARRAY_BUFFER, mNBins, NULL, GL_DYNAMIC_DRAW);
mHistogramVBOSize = mNBins*sizeof(unsigned char);
break;
default: fg::TypeError("Plot::Plot", __LINE__, 1, mDataType);
}
CheckGL("End hist_impl::hist_impl");
}
