mirror of
https://github.com/ZDoom/qzdoom.git
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124 lines
4.5 KiB
C++
124 lines
4.5 KiB
C++
/*
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** gl_postprocessstate.cpp
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** Render state maintenance
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**
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**---------------------------------------------------------------------------
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** Copyright 2016 Magnus Norddahl
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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** 4. When not used as part of GZDoom or a GZDoom derivative, this code will be
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** covered by the terms of the GNU Lesser General Public License as published
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** by the Free Software Foundation; either version 2.1 of the License, or (at
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** your option) any later version.
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** 5. Full disclosure of the entire project's source code, except for third
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** party libraries is mandatory. (NOTE: This clause is non-negotiable!)
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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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_postprocessstate.h"
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//-----------------------------------------------------------------------------
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//
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// Saves state modified by post processing shaders
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//
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//-----------------------------------------------------------------------------
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FGLPostProcessState::FGLPostProcessState()
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{
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glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTex);
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glActiveTexture(GL_TEXTURE0);
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
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if (gl.flags & RFL_SAMPLER_OBJECTS)
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{
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glGetIntegerv(GL_SAMPLER_BINDING, &samplerBinding);
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glBindSampler(0, 0);
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}
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glGetBooleanv(GL_BLEND, &blendEnabled);
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glGetBooleanv(GL_SCISSOR_TEST, &scissorEnabled);
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glGetBooleanv(GL_DEPTH_TEST, &depthEnabled);
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glGetBooleanv(GL_MULTISAMPLE, &multisampleEnabled);
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glGetIntegerv(GL_CURRENT_PROGRAM, ¤tProgram);
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glGetIntegerv(GL_BLEND_EQUATION_RGB, &blendEquationRgb);
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glGetIntegerv(GL_BLEND_EQUATION_ALPHA, &blendEquationAlpha);
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glGetIntegerv(GL_BLEND_SRC_RGB, &blendSrcRgb);
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glGetIntegerv(GL_BLEND_SRC_ALPHA, &blendSrcAlpha);
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glGetIntegerv(GL_BLEND_DST_RGB, &blendDestRgb);
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glGetIntegerv(GL_BLEND_DST_ALPHA, &blendDestAlpha);
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glDisable(GL_MULTISAMPLE);
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_SCISSOR_TEST);
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glDisable(GL_BLEND);
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}
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//-----------------------------------------------------------------------------
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//
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// Restores state at the end of post processing
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//
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//-----------------------------------------------------------------------------
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FGLPostProcessState::~FGLPostProcessState()
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{
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if (blendEnabled)
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glEnable(GL_BLEND);
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else
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glDisable(GL_BLEND);
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if (scissorEnabled)
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glEnable(GL_SCISSOR_TEST);
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else
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glDisable(GL_SCISSOR_TEST);
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if (depthEnabled)
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glEnable(GL_DEPTH_TEST);
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else
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glDisable(GL_DEPTH_TEST);
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if (multisampleEnabled)
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glEnable(GL_MULTISAMPLE);
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else
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glDisable(GL_MULTISAMPLE);
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glBlendEquationSeparate(blendEquationRgb, blendEquationAlpha);
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glBlendFuncSeparate(blendSrcRgb, blendDestRgb, blendSrcAlpha, blendDestAlpha);
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glUseProgram(currentProgram);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, textureBinding);
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if (gl.flags & RFL_SAMPLER_OBJECTS)
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glBindSampler(0, samplerBinding);
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glActiveTexture(activeTex);
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}
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