81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_VCL_OPENGL_OPENGLHELPER_HXX
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#define INCLUDED_VCL_OPENGL_OPENGLHELPER_HXX
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#include <GL/glew.h>
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#include <vcl/dllapi.h>
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#include <vcl/bitmapex.hxx>
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#include <rtl/ustring.hxx>
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#if defined UNX && !defined MACOSX && !defined IOS && !defined ANDROID && !defined(LIBO_HEADLESS)
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# include <prex.h>
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# include "GL/glxew.h"
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# include <postx.h>
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#endif
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class VCL_DLLPUBLIC OpenGLHelper
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{
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public:
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static GLint LoadShaders(const OUString& rVertexShaderName, const OUString& rFragmentShaderName, const OString& preamble = "" );
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/**
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* The caller is responsible for allocate the memory for the RGBA buffer, before call
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* this method. RGBA buffer size is assumed to be 4*width*height.
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* Since OpenGL uses textures flipped relative to BitmapEx storage this method
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* also adds the possibility to mirror the bitmap vertically at the same time.
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**/
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static void ConvertBitmapExToRGBATextureBuffer(const BitmapEx& rBitmapEx, sal_uInt8* o_pRGBABuffer, const bool bFlip = false);
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static BitmapEx ConvertBGRABufferToBitmapEx(const sal_uInt8* const pBuffer, long nWidth, long nHeight);
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static void renderToFile(long nWidth, long nHeight, const OUString& rFileName);
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static const char* GLErrorString(GLenum errorCode);
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/**
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* The caller is responsible for deleting the buffer objects identified by
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* nFramebufferId, nRenderbufferDepthId and nRenderbufferColorId
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* @param bRenderbuffer true => off-screen rendering, false => rendering to texture
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* This also affects whether to free with glDeleteRenderbuffers or glDeleteTextures
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*/
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static void createFramebuffer(long nWidth, long nHeight, GLuint& nFramebufferId,
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GLuint& nRenderbufferDepthId, GLuint& nRenderbufferColorId, bool bRenderbuffer = true);
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// Get OpenGL version (needs a context)
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static float getGLVersion();
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static void checkGLError(const char* aFile, size_t nLine);
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/**
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* checks if the device/driver pair is on our OpenGL blacklist
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*/
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static bool isDeviceBlacklisted();
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/**
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* checks if the system supports all features that are necessary for the OpenGL VCL support
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*/
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static bool supportsVCLOpenGL();
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/**
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* Returns true if VCL has OpenGL rendering enabled
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*/
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static bool isVCLOpenGLEnabled();
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#if defined UNX && !defined MACOSX && !defined IOS && !defined ANDROID && !defined(LIBO_HEADLESS)
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static bool GetVisualInfo(Display* pDisplay, int nScreen, XVisualInfo& rVI);
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static GLXFBConfig GetPixmapFBConfig( Display* pDisplay, bool& bInverted );
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#endif
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};
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#define CHECK_GL_ERROR() OpenGLHelper::checkGLError(__FILE__, __LINE__)
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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