SHOW:
|
|
- or go back to the newest paste.
| 1 | void initReduction() | |
| 2 | {
| |
| 3 | reductionEffect->Bind(); | |
| 4 | reductionEffect->Uniform("Mode", 0);
| |
| 5 | sourceTexture->Bind(GL_TEXTURE0); | |
| 6 | GetWriteBuffer().BindWrite(); | |
| 7 | drawQuad(0, 0, sourceTexture->Width(), sourceTexture->Height()); | |
| 8 | SwapBuffers(); | |
| 9 | } | |
| 10 | ||
| 11 | void Apply() | |
| 12 | {
| |
| 13 | using namespace std; | |
| 14 | glPushAttrib(GL_ENABLE_BIT); | |
| 15 | glDisable(GL_STENCIL_TEST); | |
| 16 | glDisable(GL_DEPTH_TEST); | |
| 17 | glDisable(GL_BLEND); | |
| 18 | glDisable(GL_CULL_FACE); | |
| 19 | initReduction(); | |
| 20 | reductionEffect->Bind(); | |
| 21 | reductionEffect->Uniform("KernelSize", kernelSize);
| |
| 22 | reductionEffect->Uniform("Mode", 1);
| |
| 23 | unsigned cWidth, cHeight; | |
| 24 | ||
| 25 | cWidth = sourceTexture->Width() / kernelSize; | |
| 26 | cHeight = sourceTexture->Height() / kernelSize; | |
| 27 | ||
| 28 | int iter = 2; | |
| 29 | while(cWidth > 1 || cHeight > 1) | |
| 30 | {
| |
| 31 | GetReadBuffer().BindRead(GL_TEXTURE0); | |
| 32 | GetWriteBuffer().BindWrite(); | |
| 33 | ||
| 34 | reductionEffect->Uniform("Iteration", iter);
| |
| 35 | reductionEffect->Uniform("CWidth", cWidth);
| |
| 36 | reductionEffect->Uniform("CHeight", cHeight);
| |
| 37 | reductionEffect->Uniform("TexelSize", fvec2( 1.0f / cWidth, 1.0f / cHeight));
| |
| 38 | drawQuad(0, 0, cWidth, cHeight); | |
| 39 | ||
| 40 | cWidth = max<unsigned>(cWidth / kernelSize, 1); | |
| 41 | cHeight = max<unsigned>(cHeight / kernelSize, 1); | |
| 42 | ||
| 43 | iter *= iter; | |
| 44 | SwapBuffers(); | |
| 45 | } | |
| 46 | ||
| 47 | glPopAttrib(); | |
| 48 | } |
