mirror of
https://github.com/ZDoom/Raze.git
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134 lines
No EOL
3.9 KiB
C++
134 lines
No EOL
3.9 KiB
C++
/*
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** Postprocessing framework
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** Copyright (c) 2016-2020 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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*/
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#include "templates.h"
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#include "gl_load/gl_system.h"
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#include "gl_load/gl_interface.h"
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#include "gl/renderer/gl_postprocessstate.h"
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namespace OpenGLRenderer
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{
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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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SaveTextureBindings(1);
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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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void FGLPostProcessState::SaveTextureBindings(unsigned int numUnits)
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{
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while (textureBinding.Size() < numUnits)
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{
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unsigned int i = textureBinding.Size();
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GLint texture;
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glActiveTexture(GL_TEXTURE0 + i);
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &texture);
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glBindTexture(GL_TEXTURE_2D, 0);
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textureBinding.Push(texture);
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GLint sampler;
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glGetIntegerv(GL_SAMPLER_BINDING, &sampler);
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glBindSampler(i, 0);
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samplerBinding.Push(sampler);
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}
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glActiveTexture(GL_TEXTURE0);
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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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// Fully unbind to avoid incomplete texture warnings from Nvidia's driver when gl_debug_level 4 is active
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for (unsigned int i = 0; i < textureBinding.Size(); i++)
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{
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glActiveTexture(GL_TEXTURE0 + i);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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for (unsigned int i = 0; i < samplerBinding.Size(); i++)
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{
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glBindSampler(i, samplerBinding[i]);
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}
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for (unsigned int i = 0; i < textureBinding.Size(); i++)
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{
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glActiveTexture(GL_TEXTURE0 + i);
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glBindTexture(GL_TEXTURE_2D, textureBinding[i]);
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}
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glActiveTexture(activeTex);
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}
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} |