OpenGL acceleration

[sthenic]

• Shader wrapper class
  • Load shaders (vertex + fragment) from file
• Vertex buffer (+array) wrapper class
  • We need a resize operation glBufferData(NULL).
  • We need an operation to set new contents. Get pointer via glMapBuffer/glMapBufferRange. std::memcpy for speed?
• Texture wrapper class
  • Allocate a certain size (don't fill):

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL)
    

  • Probably need to call glViewport with these sizes before rendering.
• Framebuffer wrapper class
  • Need to be able to set (and swap) the bound texture (for when the viewport size changes).

    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    

  • Can we make do without calling glDrawBuffers(GL_COLOR_ATTACHMENT0)?
• Line plotting class
  • Shaders
  • Needs to handle an arbitrary number of lines. We probably want to plot all channels at the same time for performance reasons?
  • Figure out how to handle that the selected channel is plotted "on top". Something with the depth (z-axis)?
• Heatmap plotting class
  • Shaders
• Render with ImPlot::Image(<texture>)