8b6e09ca09
This was done to clean up the license and to ensure that any commercial fork of the engine has to obey the far stricter requirements concerning source distribution. The old license was compatible with GPLv2 whereas combining GPLv2 and LGPLv3 force a license upgrade to GPLv3. The license of code that originates from ZDoomGL has not been changed.
389 lines
11 KiB
C++
389 lines
11 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2009-2016 Christoph Oelckers
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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/*
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** gl_renderstate.cpp
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** Render state maintenance
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**
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*/
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#include "templates.h"
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#include "gl/system/gl_system.h"
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#include "gl/system/gl_interface.h"
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#include "gl/data/gl_data.h"
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#include "gl/data/gl_vertexbuffer.h"
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#include "gl/system/gl_cvars.h"
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#include "gl/shaders/gl_shader.h"
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#include "gl/renderer/gl_renderer.h"
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#include "gl/renderer/gl_renderstate.h"
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#include "gl/renderer/gl_colormap.h"
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#include "gl/dynlights//gl_lightbuffer.h"
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#include "gl/renderer/gl_renderbuffers.h"
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void gl_SetTextureMode(int type);
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FRenderState gl_RenderState;
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CVAR(Bool, gl_direct_state_change, true, 0)
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static VSMatrix identityMatrix(1);
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TArray<VSMatrix> gl_MatrixStack;
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void FRenderState::Reset()
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{
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mTextureEnabled = true;
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mClipLineEnabled = mSplitEnabled = mBrightmapEnabled = mFogEnabled = mGlowEnabled = false;
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mColorMask[0] = mColorMask[1] = mColorMask[2] = mColorMask[3] = true;
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currentColorMask[0] = currentColorMask[1] = currentColorMask[2] = currentColorMask[3] = true;
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mFogColor.d = -1;
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mTextureMode = -1;
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mLightIndex = -1;
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mDesaturation = 0;
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mSrcBlend = GL_SRC_ALPHA;
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mDstBlend = GL_ONE_MINUS_SRC_ALPHA;
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mAlphaThreshold = 0.5f;
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mBlendEquation = GL_FUNC_ADD;
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mModelMatrixEnabled = false;
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mTextureMatrixEnabled = false;
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mObjectColor = 0xffffffff;
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mVertexBuffer = mCurrentVertexBuffer = NULL;
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mColormapState = CM_DEFAULT;
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mSoftLight = 0;
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mLightParms[0] = mLightParms[1] = mLightParms[2] = 0.0f;
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mLightParms[3] = -1.f;
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mSpecialEffect = EFF_NONE;
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mClipHeight = 0.f;
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mClipHeightDirection = 0.f;
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mShaderTimer = 0.0f;
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ClearClipSplit();
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stSrcBlend = stDstBlend = -1;
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stBlendEquation = -1;
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stAlphaThreshold = -1.f;
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stAlphaTest = 0;
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mLastDepthClamp = true;
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mInterpolationFactor = 0.0f;
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mColor.Set(1.0f, 1.0f, 1.0f, 1.0f);
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mCameraPos.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mGlowTop.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mGlowBottom.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mGlowTopPlane.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mGlowBottomPlane.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mSplitTopPlane.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mSplitBottomPlane.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mClipLine.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mDynColor.Set(0.0f, 0.0f, 0.0f, 0.0f);
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mEffectState = 0;
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activeShader = nullptr;
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mProjectionMatrix.loadIdentity();
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mViewMatrix.loadIdentity();
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mModelMatrix.loadIdentity();
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mTextureMatrix.loadIdentity();
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}
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//==========================================================================
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//
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// Apply shader settings
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//
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//==========================================================================
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bool FRenderState::ApplyShader()
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{
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static const float nulvec[] = { 0.f, 0.f, 0.f, 0.f };
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if (mSpecialEffect > EFF_NONE)
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{
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activeShader = GLRenderer->mShaderManager->BindEffect(mSpecialEffect);
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}
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else
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{
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activeShader = GLRenderer->mShaderManager->Get(mTextureEnabled ? mEffectState : 4, mAlphaThreshold >= 0.f);
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activeShader->Bind();
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}
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int fogset = 0;
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if (mFogEnabled)
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{
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if ((mFogColor & 0xffffff) == 0)
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{
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fogset = gl_fogmode;
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}
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else
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{
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fogset = -gl_fogmode;
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}
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}
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glVertexAttrib4fv(VATTR_COLOR, mColor.vec);
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activeShader->muDesaturation.Set(mDesaturation / 255.f);
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activeShader->muFogEnabled.Set(fogset);
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activeShader->muTextureMode.Set(mTextureMode);
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activeShader->muCameraPos.Set(mCameraPos.vec);
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activeShader->muLightParms.Set(mLightParms);
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activeShader->muFogColor.Set(mFogColor);
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activeShader->muObjectColor.Set(mObjectColor);
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activeShader->muDynLightColor.Set(mDynColor.vec);
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activeShader->muInterpolationFactor.Set(mInterpolationFactor);
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activeShader->muClipHeight.Set(mClipHeight);
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activeShader->muClipHeightDirection.Set(mClipHeightDirection);
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activeShader->muTimer.Set(gl_frameMS * mShaderTimer / 1000.f);
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activeShader->muAlphaThreshold.Set(mAlphaThreshold);
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activeShader->muLightIndex.Set(mLightIndex); // will always be -1 for now
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activeShader->muClipSplit.Set(mClipSplit);
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if (mGlowEnabled)
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{
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activeShader->muGlowTopColor.Set(mGlowTop.vec);
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activeShader->muGlowBottomColor.Set(mGlowBottom.vec);
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activeShader->muGlowTopPlane.Set(mGlowTopPlane.vec);
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activeShader->muGlowBottomPlane.Set(mGlowBottomPlane.vec);
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activeShader->currentglowstate = 1;
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}
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else if (activeShader->currentglowstate)
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{
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// if glowing is on, disable it.
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activeShader->muGlowTopColor.Set(nulvec);
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activeShader->muGlowBottomColor.Set(nulvec);
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activeShader->muGlowTopPlane.Set(nulvec);
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activeShader->muGlowBottomPlane.Set(nulvec);
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activeShader->currentglowstate = 0;
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}
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if (mSplitEnabled)
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{
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activeShader->muSplitTopPlane.Set(mSplitTopPlane.vec);
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activeShader->muSplitBottomPlane.Set(mSplitBottomPlane.vec);
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activeShader->currentsplitstate = 1;
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}
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else if (activeShader->currentsplitstate)
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{
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activeShader->muSplitTopPlane.Set(nulvec);
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activeShader->muSplitBottomPlane.Set(nulvec);
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activeShader->currentsplitstate = 0;
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}
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if (mClipLineEnabled)
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{
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activeShader->muClipLine.Set(mClipLine.vec);
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activeShader->currentcliplinestate = 1;
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}
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else if (activeShader->currentcliplinestate)
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{
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activeShader->muClipLine.Set(-10000000.0, 0, 0, 0);
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activeShader->currentcliplinestate = 0;
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}
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if (mColormapState != activeShader->currentfixedcolormap)
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{
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float r, g, b;
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activeShader->currentfixedcolormap = mColormapState;
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if (mColormapState == CM_DEFAULT)
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{
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activeShader->muFixedColormap.Set(0);
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}
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else if (mColormapState > CM_DEFAULT && mColormapState < CM_MAXCOLORMAP)
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{
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if (FGLRenderBuffers::IsEnabled())
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{
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// When using postprocessing to apply the colormap, we must render the image fullbright here.
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activeShader->muFixedColormap.Set(2);
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activeShader->muColormapStart.Set(1, 1, 1, 1.f);
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}
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else
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{
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FSpecialColormap *scm = &SpecialColormaps[gl_fixedcolormap - CM_FIRSTSPECIALCOLORMAP];
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float m[] = { scm->ColorizeEnd[0] - scm->ColorizeStart[0],
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scm->ColorizeEnd[1] - scm->ColorizeStart[1], scm->ColorizeEnd[2] - scm->ColorizeStart[2], 0.f };
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activeShader->muFixedColormap.Set(1);
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activeShader->muColormapStart.Set(scm->ColorizeStart[0], scm->ColorizeStart[1], scm->ColorizeStart[2], 0.f);
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activeShader->muColormapRange.Set(m);
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}
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}
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else if (mColormapState == CM_FOGLAYER)
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{
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activeShader->muFixedColormap.Set(3);
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}
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else if (mColormapState == CM_LITE)
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{
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if (gl_enhanced_nightvision)
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{
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r = 0.375f, g = 1.0f, b = 0.375f;
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}
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else
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{
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r = g = b = 1.f;
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}
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activeShader->muFixedColormap.Set(2);
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activeShader->muColormapStart.Set(r, g, b, 1.f);
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}
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else if (mColormapState >= CM_TORCH)
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{
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int flicker = mColormapState - CM_TORCH;
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r = (0.8f + (7 - flicker) / 70.0f);
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if (r > 1.0f) r = 1.0f;
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b = g = r;
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if (gl_enhanced_nightvision) b = g * 0.75f;
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activeShader->muFixedColormap.Set(2);
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activeShader->muColormapStart.Set(r, g, b, 1.f);
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}
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}
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if (mTextureMatrixEnabled)
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{
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mTextureMatrix.matrixToGL(activeShader->texturematrix_index);
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activeShader->currentTextureMatrixState = true;
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}
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else if (activeShader->currentTextureMatrixState)
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{
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activeShader->currentTextureMatrixState = false;
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identityMatrix.matrixToGL(activeShader->texturematrix_index);
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}
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if (mModelMatrixEnabled)
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{
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mModelMatrix.matrixToGL(activeShader->modelmatrix_index);
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activeShader->currentModelMatrixState = true;
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}
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else if (activeShader->currentModelMatrixState)
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{
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activeShader->currentModelMatrixState = false;
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identityMatrix.matrixToGL(activeShader->modelmatrix_index);
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}
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return true;
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}
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//==========================================================================
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//
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// Apply State
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//
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//==========================================================================
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void FRenderState::Apply()
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{
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if (!gl_direct_state_change)
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{
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if (mSrcBlend != stSrcBlend || mDstBlend != stDstBlend)
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{
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stSrcBlend = mSrcBlend;
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stDstBlend = mDstBlend;
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glBlendFunc(mSrcBlend, mDstBlend);
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}
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if (mBlendEquation != stBlendEquation)
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{
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stBlendEquation = mBlendEquation;
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glBlendEquation(mBlendEquation);
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}
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}
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//ApplyColorMask(); I don't think this is needed.
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if (mVertexBuffer != mCurrentVertexBuffer)
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{
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if (mVertexBuffer == NULL) glBindBuffer(GL_ARRAY_BUFFER, 0);
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else mVertexBuffer->BindVBO();
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mCurrentVertexBuffer = mVertexBuffer;
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}
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if (!gl.legacyMode)
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{
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ApplyShader();
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}
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else
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{
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ApplyFixedFunction();
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}
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}
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void FRenderState::ApplyColorMask()
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{
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if ((mColorMask[0] != currentColorMask[0]) ||
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(mColorMask[1] != currentColorMask[1]) ||
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(mColorMask[2] != currentColorMask[2]) ||
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(mColorMask[3] != currentColorMask[3]))
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{
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glColorMask(mColorMask[0], mColorMask[1], mColorMask[2], mColorMask[3]);
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currentColorMask[0] = mColorMask[0];
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currentColorMask[1] = mColorMask[1];
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currentColorMask[2] = mColorMask[2];
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currentColorMask[3] = mColorMask[3];
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}
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}
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void FRenderState::ApplyMatrices()
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{
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if (GLRenderer->mShaderManager != NULL)
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{
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GLRenderer->mShaderManager->ApplyMatrices(&mProjectionMatrix, &mViewMatrix);
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}
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}
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void FRenderState::ApplyLightIndex(int index)
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{
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if (!gl.legacyMode)
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{
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if (index > -1 && GLRenderer->mLights->GetBufferType() == GL_UNIFORM_BUFFER)
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{
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index = GLRenderer->mLights->BindUBO(index);
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}
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activeShader->muLightIndex.Set(index);
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}
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}
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void FRenderState::SetClipHeight(float height, float direction)
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{
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mClipHeight = height;
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mClipHeightDirection = direction;
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#if 1
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// This still doesn't work... :(
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if (gl.flags & RFL_NO_CLIP_PLANES) return;
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#endif
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if (direction != 0.f)
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{
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/*
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if (gl.flags & RFL_NO_CLIP_PLANES)
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{
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glLoadMatrixf(mViewMatrix.get());
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// Plane mirrors never are slopes.
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double d[4] = { 0, direction, 0, -direction * height };
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glClipPlane(GL_CLIP_PLANE0, d);
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glPopMatrix();
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}
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*/
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glEnable(GL_CLIP_DISTANCE0);
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}
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else
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{
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glDisable(GL_CLIP_DISTANCE0); // GL_CLIP_PLANE0 is the same value so no need to make a distinction
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}
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}
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