| 28 | { |
| 29 | |
| 30 | void histogram_impl::bindResources(const int pWindowId) |
| 31 | { |
| 32 | if (mVAOMap.find(pWindowId) == mVAOMap.end()) { |
| 33 | CheckGL("Begin histogram_impl::bindResources"); |
| 34 | GLuint vao = 0; |
| 35 | /* create a vertex array object |
| 36 | * with appropriate bindings */ |
| 37 | glGenVertexArrays(1, &vao); |
| 38 | glBindVertexArray(vao); |
| 39 | // attach histogram bar vertices |
| 40 | glEnableVertexAttribArray(mPointIndex); |
| 41 | glBindBuffer(GL_ARRAY_BUFFER, screenQuadVBO(pWindowId)); |
| 42 | glVertexAttribPointer(mPointIndex, 2, GL_FLOAT, GL_FALSE, 0, 0); |
| 43 | // attach histogram frequencies |
| 44 | glEnableVertexAttribArray(mFreqIndex); |
| 45 | glBindBuffer(GL_ARRAY_BUFFER, mVBO); |
| 46 | glVertexAttribPointer(mFreqIndex, 1, mGLType, GL_FALSE, 0, 0); |
| 47 | glVertexAttribDivisor(mFreqIndex, 1); |
| 48 | // attach histogram bar colors |
| 49 | glEnableVertexAttribArray(mColorIndex); |
| 50 | glBindBuffer(GL_ARRAY_BUFFER, mCBO); |
| 51 | glVertexAttribPointer(mColorIndex, 3, GL_FLOAT, GL_FALSE, 0, 0); |
| 52 | glVertexAttribDivisor(mColorIndex, 1); |
| 53 | // attach histogram bar alphas |
| 54 | glEnableVertexAttribArray(mAlphaIndex); |
| 55 | glBindBuffer(GL_ARRAY_BUFFER, mABO); |
| 56 | glVertexAttribPointer(mAlphaIndex, 1, GL_FLOAT, GL_FALSE, 0, 0); |
| 57 | glVertexAttribDivisor(mAlphaIndex, 1); |
| 58 | glBindVertexArray(0); |
| 59 | /* store the vertex array object corresponding to |
| 60 | * the window instance in the map */ |
| 61 | mVAOMap[pWindowId] = vao; |
| 62 | CheckGL("End histogram_impl::bindResources"); |
| 63 | } |
| 64 | |
| 65 | glBindVertexArray(mVAOMap[pWindowId]); |
| 66 | } |
| 67 | |
| 68 | void histogram_impl::unbindResources() const |
| 69 | { |
nothing calls this directly
no test coverage detected