mirror of
https://github.com/DrBeef/Doom3Quest.git
synced 2025-02-16 00:51:12 +00:00
9a0823392c
start of weapons working (6DoF) looks like glitchiness is fixed stereo working correctly most buttons working nicely positional tracking (sort of)
436 lines
11 KiB
C++
436 lines
11 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#include "sys/platform.h"
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#include "renderer/tr_local.h"
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frameData_t *frameData;
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backEndState_t backEnd;
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const unsigned int NUM_FRAME_DATA = 2;
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frameData_t *smpFrameData[NUM_FRAME_DATA];
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volatile unsigned int smpFrame;
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/*
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======================
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RB_SetDefaultGLState
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This should initialize all GL state that any part of the entire program
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may touch, including the editor.
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======================
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*/
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void RB_SetDefaultGLState( void ) {
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int i;
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// Clear value for the Depth buffer
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qglClearDepthf(1.0f);
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// make sure our GL state vector is set correctly
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memset( &backEnd.glState, 0, sizeof( backEnd.glState ) );
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backEnd.glState.forceGlState = true;
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// All color channels are used
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qglColorMask( 1, 1, 1, 1 );
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qglEnable( GL_DEPTH_TEST );
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qglEnable( GL_BLEND );
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qglEnable( GL_SCISSOR_TEST );
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qglEnable( GL_CULL_FACE );
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qglDisable( GL_STENCIL_TEST );
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qglDepthMask( GL_TRUE );
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qglDepthFunc( GL_ALWAYS );
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qglCullFace( GL_FRONT_AND_BACK );
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if ( r_useScissor.GetBool() ) {
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qglScissor( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
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}
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backEnd.glState.currentTexture = -1; // Force texture unit to be reset
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for ( i = glConfig.maxTextureUnits - 1 ; i >= 0 ; i-- ) {
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GL_SelectTexture( i );
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globalImages->BindNull();
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}
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// Last active texture is Tex0
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}
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/*
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====================
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GL_SelectTexture
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====================
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*/
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void GL_SelectTexture( int unit ) {
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if ( backEnd.glState.currentTexture != unit ) {
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qglActiveTexture(GL_TEXTURE0 + unit);
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backEnd.glState.currentTexture = unit;
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}
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}
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/*
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====================
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GL_Cull
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This handles the flipping needed when the view being
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rendered is a mirored view.
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====================
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*/
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void GL_Cull( int cullType ) {
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if ( backEnd.glState.faceCulling == cullType ) {
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return;
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}
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if ( cullType == CT_TWO_SIDED ) {
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qglDisable( GL_CULL_FACE );
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} else {
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if ( backEnd.glState.faceCulling == CT_TWO_SIDED ) {
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qglEnable( GL_CULL_FACE );
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}
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if ( cullType == CT_BACK_SIDED ) {
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if ( backEnd.viewDef->isMirror ) {
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qglCullFace( GL_FRONT );
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} else {
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qglCullFace( GL_BACK );
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}
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} else {
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if ( backEnd.viewDef->isMirror ) {
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qglCullFace( GL_BACK );
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} else {
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qglCullFace( GL_FRONT );
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}
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}
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}
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backEnd.glState.faceCulling = cullType;
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}
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/*
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=================
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GL_ClearStateDelta
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Clears the state delta bits, so the next GL_State
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will set every item
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=================
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*/
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void GL_ClearStateDelta( void ) {
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backEnd.glState.forceGlState = true;
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}
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/*
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====================
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GL_State
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This routine is responsible for setting the most commonly changed state
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====================
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*/
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void GL_State( int stateBits ) {
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int diff;
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if ( !r_useStateCaching.GetBool() || backEnd.glState.forceGlState ) {
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// make sure everything is set all the time, so we
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// can see if our delta checking is screwing up
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diff = -1;
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backEnd.glState.forceGlState = false;
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} else {
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diff = stateBits ^ backEnd.glState.glStateBits;
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if ( !diff ) {
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return;
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}
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}
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//
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// check depthFunc bits
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//
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if ( diff & ( GLS_DEPTHFUNC_EQUAL | GLS_DEPTHFUNC_LESS | GLS_DEPTHFUNC_ALWAYS ) ) {
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if ( stateBits & GLS_DEPTHFUNC_EQUAL ) {
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qglDepthFunc( GL_EQUAL );
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} else if ( stateBits & GLS_DEPTHFUNC_ALWAYS ) {
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qglDepthFunc( GL_ALWAYS );
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} else {
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qglDepthFunc( GL_LEQUAL );
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}
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}
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//
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// check blend bits
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//
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if ( diff & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) ) {
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GLenum srcFactor, dstFactor;
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switch ( stateBits & GLS_SRCBLEND_BITS ) {
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case GLS_SRCBLEND_ZERO:
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srcFactor = GL_ZERO;
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break;
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case GLS_SRCBLEND_ONE:
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srcFactor = GL_ONE;
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break;
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case GLS_SRCBLEND_DST_COLOR:
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srcFactor = GL_DST_COLOR;
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break;
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case GLS_SRCBLEND_ONE_MINUS_DST_COLOR:
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srcFactor = GL_ONE_MINUS_DST_COLOR;
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break;
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case GLS_SRCBLEND_SRC_ALPHA:
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srcFactor = GL_SRC_ALPHA;
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break;
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case GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA:
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srcFactor = GL_ONE_MINUS_SRC_ALPHA;
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break;
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case GLS_SRCBLEND_DST_ALPHA:
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srcFactor = GL_DST_ALPHA;
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break;
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case GLS_SRCBLEND_ONE_MINUS_DST_ALPHA:
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srcFactor = GL_ONE_MINUS_DST_ALPHA;
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break;
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case GLS_SRCBLEND_ALPHA_SATURATE:
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srcFactor = GL_SRC_ALPHA_SATURATE;
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break;
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default:
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srcFactor = GL_ONE; // to get warning to shut up
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common->Error( "GL_State: invalid src blend state bits\n" );
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break;
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}
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switch ( stateBits & GLS_DSTBLEND_BITS ) {
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case GLS_DSTBLEND_ZERO:
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dstFactor = GL_ZERO;
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break;
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case GLS_DSTBLEND_ONE:
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dstFactor = GL_ONE;
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break;
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case GLS_DSTBLEND_SRC_COLOR:
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dstFactor = GL_SRC_COLOR;
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break;
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case GLS_DSTBLEND_ONE_MINUS_SRC_COLOR:
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dstFactor = GL_ONE_MINUS_SRC_COLOR;
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break;
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case GLS_DSTBLEND_SRC_ALPHA:
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dstFactor = GL_SRC_ALPHA;
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break;
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case GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA:
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dstFactor = GL_ONE_MINUS_SRC_ALPHA;
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break;
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case GLS_DSTBLEND_DST_ALPHA:
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dstFactor = GL_DST_ALPHA;
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break;
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case GLS_DSTBLEND_ONE_MINUS_DST_ALPHA:
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dstFactor = GL_ONE_MINUS_DST_ALPHA;
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break;
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default:
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dstFactor = GL_ONE; // to get warning to shut up
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common->Error( "GL_State: invalid dst blend state bits\n" );
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break;
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}
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qglBlendFunc( srcFactor, dstFactor );
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}
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//
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// check depthmask
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//
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if ( diff & GLS_DEPTHMASK ) {
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if ( stateBits & GLS_DEPTHMASK ) {
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qglDepthMask( GL_FALSE );
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} else {
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qglDepthMask( GL_TRUE );
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}
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}
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//
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// check colormask
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//
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if ( diff & (GLS_REDMASK|GLS_GREENMASK|GLS_BLUEMASK|GLS_ALPHAMASK) ) {
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GLboolean r, g, b, a;
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r = ( stateBits & GLS_REDMASK ) ? 0 : 1;
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g = ( stateBits & GLS_GREENMASK ) ? 0 : 1;
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b = ( stateBits & GLS_BLUEMASK ) ? 0 : 1;
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a = ( stateBits & GLS_ALPHAMASK ) ? 0 : 1;
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qglColorMask( r, g, b, a );
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}
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backEnd.glState.glStateBits = stateBits;
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}
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/*
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============================================================================
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RENDER BACK END THREAD FUNCTIONS
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============================================================================
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*/
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/*
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=============
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RB_SetBuffer
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=============
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*/
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static void RB_SetBuffer( const void *data ) {
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const setBufferCommand_t *cmd;
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// see which draw buffer we want to render the frame to
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cmd = (const setBufferCommand_t *)data;
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backEnd.frameCount = cmd->frameCount;
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// Disabled for OES2
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//qglDrawBuffer( cmd->buffer );
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GLimp_SetupFrame((int)cmd->buffer);
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// clear screen for debugging
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// automatically enable this with several other debug tools
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// that might leave unrendered portions of the screen
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if ( r_clear.GetFloat() || idStr::Length( r_clear.GetString() ) != 1 || r_lockSurfaces.GetBool() || r_singleArea.GetBool() ) {
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float c[3];
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if ( sscanf( r_clear.GetString(), "%f %f %f", &c[0], &c[1], &c[2] ) == 3 ) {
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qglClearColor( c[0], c[1], c[2], 1 );
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} else if ( r_clear.GetInteger() == 2 ) {
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qglClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
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} else {
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qglClearColor( 0.4f, 0.0f, 0.25f, 1.0f );
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}
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qglClear( GL_COLOR_BUFFER_BIT );
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}
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}
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/*
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=============
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RB_SwapBuffers
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=============
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*/
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const void RB_SwapBuffers( const void *data ) {
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#ifdef WEBGL
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// GAB Note Dec 2018: Clear the Alpha channel, so that final render will not blend with the HTML5 background (canvas with premultiplied alpha)
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qglColorMask(0, 0, 0, 1);
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qglClear(GL_COLOR_BUFFER_BIT);
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#endif
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// force a gl sync if requested
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if ( r_finish.GetBool() ) {
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qglFinish();
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}
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// don't flip if drawing to front buffer
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GLimp_SwapBuffers();
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}
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/*
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=============
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RB_CopyRender
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Copy part of the current framebuffer to an image
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=============
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*/
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const void RB_CopyRender( const void *data ) {
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const copyRenderCommand_t *cmd;
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cmd = (const copyRenderCommand_t *)data;
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if ( r_skipCopyTexture.GetBool() ) {
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return;
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}
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if (cmd->image) {
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cmd->image->CopyFramebuffer( cmd->x, cmd->y, cmd->imageWidth, cmd->imageHeight, false );
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}
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}
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/*
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====================
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RB_ExecuteBackEndCommands
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This function will be called syncronously if running without
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smp extensions, or asyncronously by another thread.
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====================
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*/
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int backEndStartTime, backEndFinishTime;
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void RB_ExecuteBackEndCommands( const emptyCommand_t *cmds ) {
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// r_debugRenderToTexture
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int c_draw3d = 0, c_draw2d = 0, c_setBuffers = 0, c_swapBuffers = 0, c_copyRenders = 0;
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if ( cmds->commandId == RC_NOP && !cmds->next ) {
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return;
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}
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{
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const emptyCommand_t *cmd = cmds;
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backEndStartTime = Sys_Milliseconds();
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// needed for editor rendering
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RB_SetDefaultGLState();
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for (; cmd; cmd = (const emptyCommand_t *) cmd->next) {
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switch (cmd->commandId) {
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case RC_NOP:
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break;
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case RC_DRAW_VIEW:
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RB_DrawView(cmd);
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if (((const drawSurfsCommand_t *) cmd)->viewDef->viewEntitys) {
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c_draw3d++;
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} else {
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c_draw2d++;
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}
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break;
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case RC_SET_BUFFER:
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RB_SetBuffer(cmd);
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c_setBuffers++;
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break;
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case RC_SWAP_BUFFERS:
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RB_SwapBuffers(cmd);
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c_swapBuffers++;
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break;
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case RC_COPY_RENDER:
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RB_CopyRender(cmd);
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c_copyRenders++;
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break;
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default:
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common->Error("RB_ExecuteBackEndCommands: bad commandId");
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break;
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}
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}
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}
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// stop rendering on this thread
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backEndFinishTime = Sys_Milliseconds();
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backEnd.pc.msec = backEndFinishTime - backEndStartTime;
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if ( r_debugRenderToTexture.GetInteger() == 1 ) {
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common->Printf( "3d: %i, 2d: %i, SetBuf: %i, SwpBuf: %i, CpyRenders: %i, CpyFrameBuf: %i\n", c_draw3d, c_draw2d, c_setBuffers, c_swapBuffers, c_copyRenders, backEnd.c_copyFrameBuffer );
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backEnd.c_copyFrameBuffer = 0;
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}
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}
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