| 29 | namespace backend |
| 30 | { |
| 31 | class BufferState |
| 32 | { |
| 33 | public: |
| 34 | |
| 35 | BufferState(int saveMask) : oldDrawFBO(-1), oldReadFBO(-1), oldRBO(-1), |
| 36 | oldReadBuf(-1), nOldDrawBufs(0) |
| 37 | { |
| 38 | for(int i = 0; i < 16; i++) oldDrawBufs[i] = GL_NONE; |
| 39 | |
| 40 | if(saveMask & BS_DRAWFBO) |
| 41 | _glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &oldDrawFBO); |
| 42 | if(saveMask & BS_READFBO) |
| 43 | _glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &oldReadFBO); |
| 44 | if(saveMask & BS_RBO) |
| 45 | _glGetIntegerv(GL_RENDERBUFFER_BINDING, &oldRBO); |
| 46 | if(saveMask & BS_DRAWBUFS) |
| 47 | { |
| 48 | GLint maxDrawBufs = 16; |
| 49 | _glGetIntegerv(GL_MAX_DRAW_BUFFERS, &maxDrawBufs); |
| 50 | if(maxDrawBufs > 16) maxDrawBufs = 16; |
| 51 | for(int i = 0; i < maxDrawBufs; i++) |
| 52 | { |
| 53 | GLint drawBuf = GL_NONE; |
| 54 | _glGetIntegerv(GL_DRAW_BUFFER0 + i, &drawBuf); |
| 55 | if(drawBuf != GL_NONE) |
| 56 | oldDrawBufs[nOldDrawBufs++] = drawBuf; |
| 57 | } |
| 58 | } |
| 59 | if(saveMask & BS_READBUF) |
| 60 | _glGetIntegerv(GL_READ_BUFFER, &oldReadBuf); |
| 61 | } |
| 62 | |
| 63 | GLint getOldReadFBO() { return oldReadFBO; } |
| 64 | |
| 65 | ~BufferState(void) |
| 66 | { |
| 67 | if(oldDrawFBO >= 0) |
| 68 | _glBindFramebuffer(GL_DRAW_FRAMEBUFFER, oldDrawFBO); |
| 69 | if(oldReadFBO >= 0) |
| 70 | _glBindFramebuffer(GL_READ_FRAMEBUFFER, oldReadFBO); |
| 71 | if(oldRBO >= 0) _glBindRenderbuffer(GL_RENDERBUFFER, oldRBO); |
| 72 | if(nOldDrawBufs > 0) _glDrawBuffers(nOldDrawBufs, oldDrawBufs); |
| 73 | if(oldReadBuf >= 0) _glReadBuffer(oldReadBuf); |
| 74 | } |
| 75 | |
| 76 | private: |
| 77 | |
| 78 | GLint oldDrawFBO, oldReadFBO, oldRBO, oldReadBuf; |
| 79 | GLsizei nOldDrawBufs; |
| 80 | GLenum oldDrawBufs[16]; |
| 81 | }; |
| 82 | } |
| 83 | |
| 84 | #endif // __BUFFERSTATE_H__ |
nothing calls this directly
no outgoing calls
no test coverage detected