mirror of
https://github.com/ZDoom/qzdoom.git
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e132fc5eed
GLEW has two major problems: - it always includes everything, there is no way to restrict the header to a specific GL version - it is mostly broken with a core profile and only works if all sanity checks get switched off.
539 lines
14 KiB
C++
539 lines
14 KiB
C++
/*
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** gl_framebuffer.cpp
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** Implementation of the non-hardware specific parts of the
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** OpenGL frame buffer
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**
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**---------------------------------------------------------------------------
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** Copyright 2000-2007 Christoph Oelckers
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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 "gl/system/gl_system.h"
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#include "files.h"
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#include "m_swap.h"
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#include "v_video.h"
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#include "doomstat.h"
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#include "m_png.h"
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#include "m_crc32.h"
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#include "vectors.h"
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#include "v_palette.h"
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#include "templates.h"
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#include "farchive.h"
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#include "gl/system/gl_interface.h"
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#include "gl/system/gl_framebuffer.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_lightdata.h"
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#include "gl/data/gl_data.h"
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#include "gl/textures/gl_hwtexture.h"
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#include "gl/textures/gl_texture.h"
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#include "gl/textures/gl_translate.h"
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#include "gl/textures/gl_skyboxtexture.h"
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#include "gl/utility/gl_clock.h"
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#include "gl/utility/gl_templates.h"
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#include "gl/gl_functions.h"
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IMPLEMENT_CLASS(OpenGLFrameBuffer)
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EXTERN_CVAR (Float, vid_brightness)
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EXTERN_CVAR (Float, vid_contrast)
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EXTERN_CVAR (Bool, vid_vsync)
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CVAR(Bool, gl_aalines, false, CVAR_ARCHIVE)
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FGLRenderer *GLRenderer;
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void gl_LoadExtensions();
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void gl_PrintStartupLog();
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void gl_SetupMenu();
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//==========================================================================
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//
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//
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//
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//==========================================================================
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OpenGLFrameBuffer::OpenGLFrameBuffer(void *hMonitor, int width, int height, int bits, int refreshHz, bool fullscreen) :
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Super(hMonitor, width, height, bits, refreshHz, fullscreen)
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{
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GLRenderer = new FGLRenderer(this);
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memcpy (SourcePalette, GPalette.BaseColors, sizeof(PalEntry)*256);
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UpdatePalette ();
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ScreenshotBuffer = NULL;
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LastCamera = NULL;
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InitializeState();
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gl_SetupMenu();
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gl_GenerateGlobalBrightmapFromColormap();
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DoSetGamma();
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needsetgamma = true;
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swapped = false;
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Accel2D = true;
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SetVSync(vid_vsync);
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}
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OpenGLFrameBuffer::~OpenGLFrameBuffer()
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{
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delete GLRenderer;
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GLRenderer = NULL;
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}
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//==========================================================================
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//
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// Initializes the GL renderer
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//
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//==========================================================================
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void OpenGLFrameBuffer::InitializeState()
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{
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static bool first=true;
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if (first)
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{
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ogl_LoadFunctions();
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}
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gl_LoadExtensions();
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Super::InitializeState();
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if (first)
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{
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first=false;
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// [BB] For some reason this crashes, if compiled with MinGW and optimization. Has to be investigated.
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#ifdef _MSC_VER
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gl_PrintStartupLog();
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#endif
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}
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClearDepth(1.0f);
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glDepthFunc(GL_LESS);
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glEnable(GL_DITHER);
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glDisable(GL_CULL_FACE);
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glDisable(GL_POLYGON_OFFSET_FILL);
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glEnable(GL_POLYGON_OFFSET_LINE);
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glEnable(GL_BLEND);
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glEnable(GL_DEPTH_CLAMP);
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glDisable(GL_DEPTH_TEST);
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glEnable(GL_TEXTURE_2D);
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glDisable(GL_LINE_SMOOTH);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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int trueH = GetTrueHeight();
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int h = GetHeight();
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glViewport(0, (trueH - h)/2, GetWidth(), GetHeight());
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Begin2D(false);
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GLRenderer->Initialize();
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}
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//==========================================================================
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//
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// Updates the screen
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//
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//==========================================================================
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// Testing only for now.
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CVAR(Bool, gl_draw_sync, true, 0) //false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
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void OpenGLFrameBuffer::Update()
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{
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if (!CanUpdate())
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{
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GLRenderer->Flush();
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return;
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}
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Begin2D(false);
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DrawRateStuff();
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GLRenderer->Flush();
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if (GetTrueHeight() != GetHeight())
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{
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if (GLRenderer != NULL)
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GLRenderer->ClearBorders();
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Begin2D(false);
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}
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if (gl_draw_sync || !swapped)
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{
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Swap();
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}
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swapped = false;
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Unlock();
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CheckBench();
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}
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//==========================================================================
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//
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// Swap the buffers
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//
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//==========================================================================
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void OpenGLFrameBuffer::Swap()
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{
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Finish.Reset();
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Finish.Clock();
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glFinish();
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if (needsetgamma)
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{
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//DoSetGamma();
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needsetgamma = false;
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}
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SwapBuffers();
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Finish.Unclock();
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swapped = true;
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FHardwareTexture::UnbindAll();
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}
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//===========================================================================
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//
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// DoSetGamma
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//
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// (Unfortunately Windows has some safety precautions that block gamma ramps
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// that are considered too extreme. As a result this doesn't work flawlessly)
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//
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//===========================================================================
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void OpenGLFrameBuffer::DoSetGamma()
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{
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WORD gammaTable[768];
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if (m_supportsGamma)
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{
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// This formula is taken from Doomsday
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float gamma = clamp<float>(Gamma, 0.1f, 4.f);
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float contrast = clamp<float>(vid_contrast, 0.1f, 3.f);
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float bright = clamp<float>(vid_brightness, -0.8f, 0.8f);
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double invgamma = 1 / gamma;
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double norm = pow(255., invgamma - 1);
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for (int i = 0; i < 256; i++)
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{
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double val = i * contrast - (contrast - 1) * 127;
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if(gamma != 1) val = pow(val, invgamma) / norm;
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val += bright * 128;
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gammaTable[i] = gammaTable[i + 256] = gammaTable[i + 512] = (WORD)clamp<double>(val*256, 0, 0xffff);
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}
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SetGammaTable(gammaTable);
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}
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}
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bool OpenGLFrameBuffer::SetGamma(float gamma)
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{
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DoSetGamma();
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return true;
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}
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bool OpenGLFrameBuffer::SetBrightness(float bright)
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{
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DoSetGamma();
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return true;
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}
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bool OpenGLFrameBuffer::SetContrast(float contrast)
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{
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DoSetGamma();
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return true;
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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 OpenGLFrameBuffer::UpdatePalette()
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{
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int rr=0,gg=0,bb=0;
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for(int x=0;x<256;x++)
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{
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rr+=GPalette.BaseColors[x].r;
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gg+=GPalette.BaseColors[x].g;
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bb+=GPalette.BaseColors[x].b;
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}
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rr>>=8;
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gg>>=8;
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bb>>=8;
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palette_brightness = (rr*77 + gg*143 + bb*35)/255;
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}
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void OpenGLFrameBuffer::GetFlashedPalette (PalEntry pal[256])
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{
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memcpy(pal, SourcePalette, 256*sizeof(PalEntry));
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}
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PalEntry *OpenGLFrameBuffer::GetPalette ()
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{
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return SourcePalette;
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}
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bool OpenGLFrameBuffer::SetFlash(PalEntry rgb, int amount)
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{
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Flash = PalEntry(amount, rgb.r, rgb.g, rgb.b);
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return true;
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}
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void OpenGLFrameBuffer::GetFlash(PalEntry &rgb, int &amount)
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{
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rgb = Flash;
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rgb.a = 0;
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amount = Flash.a;
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}
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int OpenGLFrameBuffer::GetPageCount()
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{
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return 1;
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}
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void OpenGLFrameBuffer::GetHitlist(BYTE *hitlist)
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{
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Super::GetHitlist(hitlist);
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// check skybox textures and mark the separate faces as used
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for(int i=0;i<TexMan.NumTextures(); i++)
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{
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if (hitlist[i])
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{
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FTexture *tex = TexMan.ByIndex(i);
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if (tex->gl_info.bSkybox)
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{
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FSkyBox *sb = static_cast<FSkyBox*>(tex);
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for(int i=0;i<6;i++)
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{
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if (sb->faces[i])
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{
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int index = sb->faces[i]->id.GetIndex();
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hitlist[index] |= 1;
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}
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}
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}
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}
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}
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// check model skins
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}
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//==========================================================================
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//
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// DFrameBuffer :: CreatePalette
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//
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// Creates a native palette from a remap table, if supported.
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//
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//==========================================================================
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FNativePalette *OpenGLFrameBuffer::CreatePalette(FRemapTable *remap)
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{
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return GLTranslationPalette::CreatePalette(remap);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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bool OpenGLFrameBuffer::Begin2D(bool)
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{
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gl_RenderState.mViewMatrix.loadIdentity();
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gl_RenderState.mProjectionMatrix.ortho(0, GetWidth(), GetHeight(), 0, -1.0f, 1.0f);
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gl_RenderState.ApplyMatrices();
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glDisable(GL_DEPTH_TEST);
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// Korshun: ENABLE AUTOMAP ANTIALIASING!!!
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if (gl_aalines)
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glEnable(GL_LINE_SMOOTH);
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else
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{
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glDisable(GL_MULTISAMPLE);
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glDisable(GL_LINE_SMOOTH);
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glLineWidth(1.0);
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}
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if (GLRenderer != NULL)
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GLRenderer->Begin2D();
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return true;
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}
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//==========================================================================
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//
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// Draws a texture
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//
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//==========================================================================
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void STACK_ARGS OpenGLFrameBuffer::DrawTextureV(FTexture *img, double x0, double y0, uint32 tag, va_list tags)
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{
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DrawParms parms;
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if (ParseDrawTextureTags(img, x0, y0, tag, tags, &parms, true))
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{
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if (GLRenderer != NULL) GLRenderer->DrawTexture(img, parms);
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}
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}
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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 OpenGLFrameBuffer::DrawLine(int x1, int y1, int x2, int y2, int palcolor, uint32 color)
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{
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if (GLRenderer != NULL)
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GLRenderer->DrawLine(x1, y1, x2, y2, palcolor, color);
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}
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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 OpenGLFrameBuffer::DrawPixel(int x1, int y1, int palcolor, uint32 color)
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{
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if (GLRenderer != NULL)
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GLRenderer->DrawPixel(x1, y1, palcolor, color);
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}
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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 OpenGLFrameBuffer::Dim(PalEntry)
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{
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// Unlike in the software renderer the color is being ignored here because
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// view blending only affects the actual view with the GL renderer.
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Super::Dim(0);
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}
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void OpenGLFrameBuffer::Dim(PalEntry color, float damount, int x1, int y1, int w, int h)
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{
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if (GLRenderer != NULL)
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GLRenderer->Dim(color, damount, x1, y1, w, h);
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}
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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 OpenGLFrameBuffer::FlatFill (int left, int top, int right, int bottom, FTexture *src, bool local_origin)
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{
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if (GLRenderer != NULL)
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GLRenderer->FlatFill(left, top, right, bottom, src, local_origin);
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}
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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 OpenGLFrameBuffer::Clear(int left, int top, int right, int bottom, int palcolor, uint32 color)
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{
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if (GLRenderer != NULL)
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GLRenderer->Clear(left, top, right, bottom, palcolor, color);
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}
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//==========================================================================
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//
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// D3DFB :: FillSimplePoly
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//
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// Here, "simple" means that a simple triangle fan can draw it.
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//
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//==========================================================================
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void OpenGLFrameBuffer::FillSimplePoly(FTexture *texture, FVector2 *points, int npoints,
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double originx, double originy, double scalex, double scaley,
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angle_t rotation, FDynamicColormap *colormap, int lightlevel)
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{
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if (GLRenderer != NULL)
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{
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GLRenderer->FillSimplePoly(texture, points, npoints, originx, originy, scalex, scaley,
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rotation, colormap, lightlevel);
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}
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}
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//===========================================================================
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//
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// Takes a screenshot
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//
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//===========================================================================
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void OpenGLFrameBuffer::GetScreenshotBuffer(const BYTE *&buffer, int &pitch, ESSType &color_type)
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{
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int w = SCREENWIDTH;
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int h = SCREENHEIGHT;
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ReleaseScreenshotBuffer();
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ScreenshotBuffer = new BYTE[w * h * 3];
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glPixelStorei(GL_PACK_ALIGNMENT, 1);
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glReadPixels(0,(GetTrueHeight() - GetHeight()) / 2,w,h,GL_RGB,GL_UNSIGNED_BYTE,ScreenshotBuffer);
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glPixelStorei(GL_PACK_ALIGNMENT, 4);
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pitch = -w*3;
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color_type = SS_RGB;
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buffer = ScreenshotBuffer + w * 3 * (h - 1);
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}
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//===========================================================================
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//
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// Releases the screenshot buffer.
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//
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//===========================================================================
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void OpenGLFrameBuffer::ReleaseScreenshotBuffer()
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{
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if (ScreenshotBuffer != NULL) delete [] ScreenshotBuffer;
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ScreenshotBuffer = NULL;
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}
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void OpenGLFrameBuffer::GameRestart()
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{
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memcpy (SourcePalette, GPalette.BaseColors, sizeof(PalEntry)*256);
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UpdatePalette ();
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ScreenshotBuffer = NULL;
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LastCamera = NULL;
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gl_GenerateGlobalBrightmapFromColormap();
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}
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