69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
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//
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// GLLensFilter.cpp
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// OpenSpades
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//
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// Created by yvt on 7/22/13.
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// Copyright (c) 2013 yvt.jp. All rights reserved.
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//
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#include "GLLensFilter.h"
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#include "IGLDevice.h"
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#include "../Core/Math.h"
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#include <vector>
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#include "GLQuadRenderer.h"
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#include "GLProgram.h"
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#include "GLProgramAttribute.h"
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#include "GLProgramUniform.h"
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#include "GLRenderer.h"
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#include "../Core/Debug.h"
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namespace spades {
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namespace draw {
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GLLensFilter::GLLensFilter(GLRenderer *renderer):
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renderer(renderer){
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}
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GLColorBuffer GLLensFilter::Filter(GLColorBuffer input) {
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SPADES_MARK_FUNCTION();
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IGLDevice *dev = renderer->GetGLDevice();
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GLQuadRenderer qr(dev);
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GLProgram *lens = renderer->RegisterProgram("Shaders/PostFilters/Lens.program");
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static GLProgramAttribute lensPosition("positionAttribute");
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static GLProgramUniform lensTexture("texture");
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static GLProgramUniform lensFov("fov");
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dev->Enable(IGLDevice::Blend, false);
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lensPosition(lens);
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lensTexture(lens);
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lensFov(lens);
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lens->Use();
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client::SceneDefinition def = renderer->GetSceneDef();
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lensFov.SetValue(tanf(def.fovX * .5f),
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tanf(def.fovY * .5f));
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lensTexture.SetValue(0);
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// composite to the final image
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GLColorBuffer output = input.GetManager()->CreateBufferHandle();
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qr.SetCoordAttributeIndex(lensPosition());
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dev->BindTexture(IGLDevice::Texture2D, input.GetTexture());
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dev->BindFramebuffer(IGLDevice::Framebuffer, output.GetFramebuffer());
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dev->Viewport(0, 0, output.GetWidth(), output.GetHeight());
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qr.Draw();
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dev->BindTexture(IGLDevice::Texture2D, 0);
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return output;
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}
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}
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}
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