mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-29 21:25:54 +01:00
498 lines
18 KiB
C++
498 lines
18 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
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#include "Engine/StdH.h"
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#include <Engine/Graphics/GfxLibrary.h>
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#include <Engine/Base/Translation.h>
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#include <Engine/Base/ErrorReporting.h>
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#include <Engine/Base/Memory.h>
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#include <Engine/Base/Console.h>
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#include <Engine/Graphics/ViewPort.h>
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#include <Engine/Graphics/MultiMonitor.h>
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#include <Engine/Templates/DynamicContainer.cpp>
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#include <Engine/Templates/Stock_CTextureData.h>
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#include <Engine/Base/ListIterator.inl>
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BOOL _TBCapability = FALSE;
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extern INDEX ogl_iTBufferEffect;
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extern INDEX ogl_iTBufferSamples;
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// fog/haze textures
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extern ULONG _fog_ulTexture;
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extern ULONG _haze_ulTexture;
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// change control
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extern INDEX GFX_ctVertices;
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// attributes for t-buffer
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int aiAttribList[] = {
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WGL_DRAW_TO_WINDOW_EXT, TRUE,
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WGL_SUPPORT_OPENGL_EXT, TRUE,
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WGL_DOUBLE_BUFFER_EXT, TRUE,
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WGL_PIXEL_TYPE_EXT, WGL_TYPE_RGBA_EXT,
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WGL_COLOR_BITS_EXT, 16,
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WGL_DEPTH_BITS_EXT, 16,
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WGL_SAMPLE_BUFFERS_3DFX, 1,
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WGL_SAMPLES_3DFX, 4,
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0, 0
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};
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int *piAttribList = aiAttribList;
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// engine's internal opengl state variables
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extern BOOL GFX_bDepthTest;
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extern BOOL GFX_bDepthWrite;
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extern BOOL GFX_bAlphaTest;
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extern BOOL GFX_bBlending;
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extern BOOL GFX_bDithering;
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extern BOOL GFX_bClipping;
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extern BOOL GFX_bClipPlane;
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extern BOOL GFX_bColorArray;
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extern BOOL GFX_bFrontFace;
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extern BOOL GFX_bTruform;
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extern INDEX GFX_iActiveTexUnit;
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extern FLOAT GFX_fMinDepthRange;
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extern FLOAT GFX_fMaxDepthRange;
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extern GfxBlend GFX_eBlendSrc;
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extern GfxBlend GFX_eBlendDst;
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extern GfxComp GFX_eDepthFunc;
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extern GfxFace GFX_eCullFace;
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extern INDEX GFX_iTexModulation[GFX_MAXTEXUNITS];
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BOOL glbUsingVARs = FALSE; // vertex_array_range
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// define gl function pointers
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#define DLLFUNCTION(dll, output, name, inputs, params, required) \
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output (__stdcall *p##name) inputs = NULL;
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#include "gl_functions.h"
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#undef DLLFUNCTION
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// extensions
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void (__stdcall *pglLockArraysEXT)(GLint first, GLsizei count) = NULL;
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void (__stdcall *pglUnlockArraysEXT)(void) = NULL;
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GLboolean (__stdcall *pwglSwapIntervalEXT)(GLint interval) = NULL;
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GLint (__stdcall *pwglGetSwapIntervalEXT)(void) = NULL;
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void (__stdcall *pglActiveTextureARB)(GLenum texunit) = NULL;
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void (__stdcall *pglClientActiveTextureARB)(GLenum texunit) = NULL;
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// t-buffer support
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#ifdef PLATFORM_WIN32
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char *(__stdcall *pwglGetExtensionsStringARB)(HDC hdc);
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BOOL (__stdcall *pwglChoosePixelFormatARB)(HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
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BOOL (__stdcall *pwglGetPixelFormatAttribivARB)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int *piAttributes, int *piValues);
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#endif
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void (__stdcall *pglTBufferMask3DFX)(GLuint mask);
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// NV occlusion query
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void (__stdcall *pglGenOcclusionQueriesNV)( GLsizei n, GLuint *ids);
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void (__stdcall *pglDeleteOcclusionQueriesNV)( GLsizei n, const GLuint *ids);
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void (__stdcall *pglBeginOcclusionQueryNV)( GLuint id);
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void (__stdcall *pglEndOcclusionQueryNV)(void);
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void (__stdcall *pglGetOcclusionQueryivNV)( GLuint id, GLenum pname, GLint *params);
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void (__stdcall *pglGetOcclusionQueryuivNV)( GLuint id, GLenum pname, GLuint *params);
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GLboolean (__stdcall *pglIsOcclusionQueryNV)( GLuint id);
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// ATI GL_ATI_pn_triangles
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void (__stdcall *pglPNTrianglesiATI)( GLenum pname, GLint param);
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void (__stdcall *pglPNTrianglesfATI)( GLenum pname, GLfloat param);
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// test if an extension exists
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static BOOL HasExtension( const char *strAllExtensions, const char *strExtension)
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{
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// find substring
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const char *strFound = strstr( strAllExtensions, strExtension);
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// no extension if not found
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if( strFound==NULL) return FALSE;
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INDEX iExtensionLen = strlen(strExtension);
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// if found substring is substring of some other extension
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if( strFound[iExtensionLen]!=' ' && strFound[iExtensionLen]!=0) {
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// continue searching after that char
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return HasExtension( strFound+iExtensionLen, strExtension);
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}
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// extension found
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return TRUE;
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}
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// add OpenGL extensions to engine
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void CGfxLibrary::AddExtension_OGL( ULONG ulFlag, const char *strName)
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{
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gl_ulFlags = (gl_ulFlags & ~ulFlag) | ulFlag;
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go_strSupportedExtensions += strName;
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go_strSupportedExtensions += " ";
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}
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// determine OpenGL extensions that engine supports
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void CGfxLibrary::TestExtension_OGL( ULONG ulFlag, const char *strName)
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{
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if( HasExtension( go_strExtensions, strName)) AddExtension_OGL( ulFlag, strName);
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}
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// prepares OpenGL drawing context
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void CGfxLibrary::InitContext_OGL(void)
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{
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// must have context
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ASSERT( gl_pvpActive!=NULL);
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// reset engine's internal OpenGL state variables
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extern BOOL GFX_abTexture[GFX_MAXTEXUNITS];
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for( INDEX iUnit=0; iUnit<GFX_MAXTEXUNITS; iUnit++) {
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GFX_abTexture[iUnit] = FALSE;
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GFX_iTexModulation[iUnit] = 1;
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}
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// set default texture unit and modulation mode
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GFX_iActiveTexUnit = 0;
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gl_ctMaxStreams = 16; // GL always has enough "streams" for multi-texturing
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// reset frustum/ortho stuff
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extern BOOL GFX_bViewMatrix;
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extern FLOAT GFX_fLastL, GFX_fLastR, GFX_fLastT, GFX_fLastB, GFX_fLastN, GFX_fLastF;
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GFX_fLastL = GFX_fLastR = GFX_fLastT = GFX_fLastB = GFX_fLastN = GFX_fLastF = 0;
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GFX_bViewMatrix = TRUE;
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glbUsingVARs = FALSE;
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GFX_bTruform = FALSE;
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GFX_bClipping = TRUE;
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pglEnable( GL_TEXTURE_2D); GFX_abTexture[0] = TRUE;
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pglEnable( GL_DITHER); GFX_bDithering = TRUE;
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pglDisable( GL_BLEND); GFX_bBlending = FALSE;
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pglDisable( GL_DEPTH_TEST); GFX_bDepthTest = FALSE;
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pglDisable( GL_ALPHA_TEST); GFX_bAlphaTest = FALSE;
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pglDisable( GL_CLIP_PLANE0); GFX_bClipPlane = FALSE;
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pglDisable( GL_CULL_FACE); GFX_eCullFace = GFX_NONE;
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pglFrontFace( GL_CCW); GFX_bFrontFace = TRUE;
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pglDepthMask( GL_FALSE); GFX_bDepthWrite = FALSE;
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pglDepthFunc( GL_LEQUAL); GFX_eDepthFunc = GFX_LESS_EQUAL;
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pglBlendFunc( GL_ONE, GL_ONE); GFX_eBlendSrc = GFX_eBlendDst = GFX_ONE;
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pglDepthRange( 0.0f, 1.0f); GFX_fMinDepthRange = 0.0f;
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GFX_fMaxDepthRange = 1.0f;
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// (re)set some OpenGL defaults
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gfxPolygonMode( GFX_FILL);
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pglFrontFace( GL_CCW);
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pglShadeModel( GL_SMOOTH);
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pglEnable( GL_SCISSOR_TEST);
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pglDrawBuffer( GL_BACK);
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pglAlphaFunc( GL_GEQUAL, 0.5f);
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pglColor4f( 1.0f, 1.0f, 1.0f, 1.0f);
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pglMatrixMode( GL_MODELVIEW);
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pglLoadIdentity();
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pglMatrixMode( GL_TEXTURE);
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pglLoadIdentity();
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// enable rendering only thru vertex arrays by default
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pglEnableClientState( GL_VERTEX_ARRAY);
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pglDisableClientState( GL_NORMAL_ARRAY);
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pglDisableClientState( GL_TEXTURE_COORD_ARRAY);
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pglDisableClientState( GL_COLOR_ARRAY);
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GFX_bColorArray = FALSE;
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// set single byte pixel alignment
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pglPixelStorei( GL_PACK_ALIGNMENT, 1);
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pglPixelStorei( GL_UNPACK_ALIGNMENT, 1);
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// TEST EXTENSIONS
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CDisplayAdapter &da = gl_gaAPI[GAT_OGL].ga_adaAdapter[gl_iCurrentAdapter];
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da.da_strVendor = (const char*)pglGetString(GL_VENDOR);
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da.da_strRenderer = (const char*)pglGetString(GL_RENDERER);
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da.da_strVersion = (const char*)pglGetString(GL_VERSION);
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go_strExtensions = (const char*)pglGetString(GL_EXTENSIONS);
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// report
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CPrintF( TRANS("\n* OpenGL context created: *----------------------------------\n"));
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CPrintF( " (%s, %s, %s)\n\n", (const char *) da.da_strVendor, (const char *) da.da_strRenderer, (const char *) da.da_strVersion);
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// test for used extensions
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GLint gliRet;
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GLfloat glfRet;
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go_strSupportedExtensions = "";
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// check for WGL extensions, too
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go_strWinExtensions = "";
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#ifdef PLATFORM_WIN32
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pwglGetExtensionsStringARB = (char* (__stdcall*)(HDC))pwglGetProcAddress("wglGetExtensionsStringARB");
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if( pwglGetExtensionsStringARB != NULL) {
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AddExtension_OGL( NONE, "WGL_ARB_extensions_string"); // register
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CTempDC tdc(gl_pvpActive->vp_hWnd);
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go_strWinExtensions = (char*)pwglGetExtensionsStringARB(tdc.hdc);
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}
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#endif
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// multitexture is supported only thru GL_EXT_texture_env_combine extension
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gl_ctTextureUnits = 1;
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gl_ctRealTextureUnits = 1;
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pglActiveTextureARB = NULL;
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pglClientActiveTextureARB = NULL;
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// This renders badly on the current Intel Macs...my bug, probably. !!! FIXME
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#if PLATFORM_MACOSX
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CPrintF("Forcibly disabled multitexturing for now on Mac OS X.");
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#else
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if( HasExtension( go_strExtensions, "GL_ARB_multitexture")) {
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pglGetIntegerv( GL_MAX_TEXTURE_UNITS_ARB, (int*)&gl_ctRealTextureUnits); // get number of texture units
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if( gl_ctRealTextureUnits>1 && (HasExtension( go_strExtensions, "GL_EXT_texture_env_combine") || HasExtension( go_strExtensions, "GL_ARB_texture_env_combine")) ) {
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AddExtension_OGL( NONE, "GL_ARB_multitexture");
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AddExtension_OGL( NONE, "GL_EXT_texture_env_combine");
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pglActiveTextureARB = (void (__stdcall*)(GLenum))OGL_GetProcAddress( "glActiveTextureARB");
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pglClientActiveTextureARB = (void (__stdcall*)(GLenum))OGL_GetProcAddress( "glClientActiveTextureARB");
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ASSERT( pglActiveTextureARB!=NULL && pglClientActiveTextureARB!=NULL);
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gl_ctTextureUnits = Min( GFX_MAXTEXUNITS, gl_ctRealTextureUnits);
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} else {
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CPrintF( TRANS(" GL_TEXTURE_ENV_COMBINE extension missing - multi-texturing cannot be used.\n"));
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}
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}
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#endif
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// find all supported texture compression extensions
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TestExtension_OGL( GLF_EXTC_ARB, "GL_ARB_texture_compression");
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TestExtension_OGL( GLF_EXTC_S3TC, "GL_EXT_texture_compression_s3tc");
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TestExtension_OGL( GLF_EXTC_FXT1, "GL_3DFX_texture_compression_FXT1");
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TestExtension_OGL( GLF_EXTC_LEGACY, "GL_S3_s3tc");
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// mark if there is at least one extension present
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gl_ulFlags &= ~GLF_TEXTURECOMPRESSION;
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if( (gl_ulFlags&GLF_EXTC_ARB) || (gl_ulFlags&GLF_EXTC_FXT1)
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|| (gl_ulFlags&GLF_EXTC_S3TC) || (gl_ulFlags&GLF_EXTC_LEGACY)) {
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gl_ulFlags |= GLF_TEXTURECOMPRESSION;
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}
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// determine max supported dimension of texture
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pglGetIntegerv( GL_MAX_TEXTURE_SIZE, (GLint*)&gl_pixMaxTextureDimension);
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OGL_CHECKERROR;
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// determine support for texture LOD biasing
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gl_fMaxTextureLODBias = 0.0f;
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if( HasExtension( go_strExtensions, "GL_EXT_texture_lod_bias")) {
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AddExtension_OGL( NONE, "GL_EXT_texture_lod_bias"); // register
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// check max possible lod bias (absolute)
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pglGetFloatv( GL_MAX_TEXTURE_LOD_BIAS_EXT, &glfRet);
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GLenum gleError = pglGetError(); // just because of invalid extension implementations (S3)
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if( gleError || glfRet<0.1f || glfRet>4.0f) glfRet = 4.0f;
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gl_fMaxTextureLODBias = glfRet;
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OGL_CHECKERROR;
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}
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// determine support for anisotropic filtering
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gl_iMaxTextureAnisotropy = 1;
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if( HasExtension( go_strExtensions, "GL_EXT_texture_filter_anisotropic")) {
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AddExtension_OGL( NONE, "GL_EXT_texture_filter_anisotropic"); // register
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// keep max allowed anisotropy degree
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pglGetIntegerv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &gliRet);
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gl_iMaxTextureAnisotropy = gliRet;
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OGL_CHECKERROR;
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}
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// check support for compiled vertex arrays
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pglLockArraysEXT = NULL;
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pglUnlockArraysEXT = NULL;
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if( HasExtension( go_strExtensions, "GL_EXT_compiled_vertex_array")) {
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AddExtension_OGL( GLF_EXT_COMPILEDVERTEXARRAY, "GL_EXT_compiled_vertex_array");
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pglLockArraysEXT = (void (__stdcall*)(GLint,GLsizei))OGL_GetProcAddress( "glLockArraysEXT");
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pglUnlockArraysEXT = (void (__stdcall*)(void) )OGL_GetProcAddress( "glUnlockArraysEXT");
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ASSERT( pglLockArraysEXT!=NULL && pglUnlockArraysEXT!=NULL);
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}
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// check support for swap interval
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pwglSwapIntervalEXT = NULL;
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pwglGetSwapIntervalEXT = NULL;
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if( HasExtension( go_strExtensions, "WGL_EXT_swap_control")) {
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AddExtension_OGL( GLF_VSYNC, "WGL_EXT_swap_control");
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pwglSwapIntervalEXT = (GLboolean (__stdcall*)(GLint))OGL_GetProcAddress( "wglSwapIntervalEXT");
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pwglGetSwapIntervalEXT = (GLint (__stdcall*)(void) )OGL_GetProcAddress( "wglGetSwapIntervalEXT");
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ASSERT( pwglSwapIntervalEXT!=NULL && pwglGetSwapIntervalEXT!=NULL);
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}
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// determine support for ATI Truform technology
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extern INDEX truform_iLevel;
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extern BOOL truform_bLinear;
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truform_iLevel = -1;
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truform_bLinear = FALSE;
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pglPNTrianglesiATI = NULL;
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pglPNTrianglesfATI = NULL;
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gl_iTessellationLevel = 0;
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gl_iMaxTessellationLevel = 0;
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if( HasExtension( go_strExtensions, "GL_ATI_pn_triangles")) {
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AddExtension_OGL( NONE, "GL_ATI_pn_triangles");
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pglPNTrianglesiATI = (void (__stdcall*)(GLenum,GLint ))OGL_GetProcAddress( "glPNTrianglesiATI");
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pglPNTrianglesfATI = (void (__stdcall*)(GLenum,GLfloat))OGL_GetProcAddress( "glPNTrianglesfATI");
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ASSERT( pglPNTrianglesiATI!=NULL && pglPNTrianglesfATI!=NULL);
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// check max possible tessellation
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pglGetIntegerv( GL_MAX_PN_TRIANGLES_TESSELATION_LEVEL_ATI, &gliRet);
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gl_iMaxTessellationLevel = gliRet;
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OGL_CHECKERROR;
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}
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// if T-buffer is supported
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if( _TBCapability) {
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// add extension and disable t-buffer usage by default
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AddExtension_OGL( GLF_EXT_TBUFFER, "GL_3DFX_multisample");
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pglDisable( GL_MULTISAMPLE_3DFX);
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OGL_CHECKERROR;
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}
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// test for clamp to edge
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TestExtension_OGL( GLF_EXT_EDGECLAMP, "GL_EXT_texture_edge_clamp");
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// test for clip volume hint
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TestExtension_OGL( GLF_EXT_CLIPHINT, "GL_EXT_clip_volume_hint");
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/*
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// test for occlusion culling
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TestExtension_OGL( GLF_EXT_OCCLUSIONTEST, "GL_HP_occlusion_test");
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pglGenOcclusionQueriesNV = NULL; pglDeleteOcclusionQueriesNV = NULL;
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pglBeginOcclusionQueryNV = NULL; pglEndOcclusionQueryNV = NULL;
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pglGetOcclusionQueryivNV = NULL; pglGetOcclusionQueryuivNV = NULL;
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pglIsOcclusionQueryNV = NULL;
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if( HasExtension( go_strExtensions, "GL_NV_occlusion_query"))
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{ // prepare extension's functions
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AddExtension_OGL( GLF_EXT_OCCLUSIONQUERY, "GL_NV_occlusion_query");
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pglGenOcclusionQueriesNV = (void (__stdcall*)(GLsizei, GLuint*))pwglGetProcAddress( "glGenOcclusionQueriesNV");
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pglDeleteOcclusionQueriesNV = (void (__stdcall*)(GLsizei, const GLuint*))pwglGetProcAddress( "glDeleteOcclusionQueriesNV");
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pglBeginOcclusionQueryNV = (void (__stdcall*)(GLuint))pwglGetProcAddress( "glBeginOcclusionQueryNV");
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pglEndOcclusionQueryNV = (void (__stdcall*)(void))pwglGetProcAddress( "glEndOcclusionQueryNV");
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pglGetOcclusionQueryivNV = (void (__stdcall*)(GLuint, GLenum, GLint*))pwglGetProcAddress( "glGetOcclusionQueryivNV");
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pglGetOcclusionQueryuivNV = (void (__stdcall*)(GLuint, GLenum, GLuint*))pwglGetProcAddress( "glGetOcclusionQueryuivNV");
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pglIsOcclusionQueryNV = (GLboolean (__stdcall*)(GLuint))pwglGetProcAddress( "glIsOcclusionQueryNV");
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ASSERT( pglGenOcclusionQueriesNV!=NULL && pglDeleteOcclusionQueriesNV!=NULL
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&& pglBeginOcclusionQueryNV!=NULL && pglEndOcclusionQueryNV!=NULL
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&& pglGetOcclusionQueryivNV!=NULL && pglGetOcclusionQueryuivNV!=NULL
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&& pglIsOcclusionQueryNV!=NULL);
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}
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*/
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// done with seeking for supported extensions
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if( go_strSupportedExtensions=="") go_strSupportedExtensions = "none";
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// allocate vertex buffers
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// eglAdjustVertexBuffers(ogl_iVertexBufferSize*1024);
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// OGL_CHECKERROR;
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// check if 32-bit textures are supported
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GLuint uiTmpTex;
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const ULONG ulTmpTex = 0xFFFFFFFF;
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pglGenTextures( 1, &uiTmpTex);
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pglBindTexture( GL_TEXTURE_2D, uiTmpTex);
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pglTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, 1,1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &ulTmpTex);
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OGL_CHECKERROR;
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gl_ulFlags &= ~GLF_32BITTEXTURES;
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pglGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &gliRet);
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if( gliRet==8) gl_ulFlags |= GLF_32BITTEXTURES;
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pglDeleteTextures( 1, &uiTmpTex);
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OGL_CHECKERROR;
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// setup fog and haze textures
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extern PIX _fog_pixSizeH;
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extern PIX _fog_pixSizeL;
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extern PIX _haze_pixSize;
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pglGenTextures( 1, (GLuint*)&_fog_ulTexture);
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pglGenTextures( 1, (GLuint*)&_haze_ulTexture);
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_fog_pixSizeH = 0;
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_fog_pixSizeL = 0;
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_haze_pixSize = 0;
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OGL_CHECKERROR;
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// prepare pattern texture
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extern CTexParams _tpPattern;
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extern ULONG _ulPatternTexture;
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extern ULONG _ulLastUploadedPattern;
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pglGenTextures( 1, (GLuint*)&_ulPatternTexture);
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_ulLastUploadedPattern = 0;
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_tpPattern.Clear();
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// reset texture filtering and array locking
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_tpGlobal[0].Clear();
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_tpGlobal[1].Clear();
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_tpGlobal[2].Clear();
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_tpGlobal[3].Clear();
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GFX_ctVertices = 0;
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gl_dwVertexShader = NONE;
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// set default texture filtering/biasing
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extern INDEX gap_iTextureFiltering;
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extern INDEX gap_iTextureAnisotropy;
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extern FLOAT gap_fTextureLODBias;
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gfxSetTextureFiltering( gap_iTextureFiltering, gap_iTextureAnisotropy);
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gfxSetTextureBiasing( gap_fTextureLODBias);
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// mark pretouching and probing
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extern BOOL _bNeedPretouch;
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_bNeedPretouch = TRUE;
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gl_bAllowProbing = FALSE;
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// update console system vars
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extern void UpdateGfxSysCVars(void);
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UpdateGfxSysCVars();
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// reload all loaded textures and eventually shadows
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extern INDEX shd_bCacheAll;
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extern void ReloadTextures(void);
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extern void CacheShadows(void);
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ReloadTextures();
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if( shd_bCacheAll) CacheShadows();
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}
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static void ClearFunctionPointers(void)
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{
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// clear gl function pointers
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#define DLLFUNCTION(dll, output, name, inputs, params, required) p##name = NULL;
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#include "gl_functions.h"
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#undef DLLFUNCTION
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}
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// shutdown OpenGL driver
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void CGfxLibrary::EndDriver_OGL(void)
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{
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// unbind all textures
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if( _pTextureStock!=NULL) {
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{FOREACHINDYNAMICCONTAINER( _pTextureStock->st_ctObjects, CTextureData, ittd) {
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CTextureData &td = *ittd;
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td.td_tpLocal.Clear();
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td.Unbind();
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}}
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} // unbind fog/haze
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gfxDeleteTexture( _fog_ulTexture);
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gfxDeleteTexture( _haze_ulTexture);
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ASSERT( _ptdFlat!=NULL);
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_ptdFlat->td_tpLocal.Clear();
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_ptdFlat->Unbind();
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PlatformEndDriver_OGL();
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ClearFunctionPointers();
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}
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/*
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* 3dfx t-buffer control
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*/
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extern void SetTBufferEffect( BOOL bEnable)
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{
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// adjust console vars
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ogl_iTBufferEffect = Clamp( ogl_iTBufferEffect, 0L, 2L);
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ogl_iTBufferSamples = (1L) << FastLog2(ogl_iTBufferSamples);
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if( ogl_iTBufferSamples<2) ogl_iTBufferSamples = 4;
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// if supported
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if( _pGfx->gl_ulFlags&GLF_EXT_TBUFFER)
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{ // disable multisampling if not required
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ASSERT( pglTBufferMask3DFX!=NULL);
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if( ogl_iTBufferEffect==0 || _pGfx->go_ctSampleBuffers<2 || !bEnable) pglDisable( GL_MULTISAMPLE_3DFX);
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else {
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pglEnable( GL_MULTISAMPLE_3DFX);
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UINT uiMask = 0xFFFFFFFF;
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// set one buffer in case of motion-blur
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if( ogl_iTBufferEffect==2) uiMask = (1UL) << _pGfx->go_iCurrentWriteBuffer;
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//pglTBufferMask3DFX(uiMask);
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}
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}
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}
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