mirror of https://bitbucket.org/CPMADevs/cnq3
792 lines
22 KiB
C++
792 lines
22 KiB
C++
#include "tr_local.h"
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struct GLSL_Program {
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GLuint p; // linked program
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GLuint vs; // vertex shader
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GLuint fs; // fragment shader
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};
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static GLuint progCurrent;
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static void GL_Program( const GLSL_Program& prog )
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{
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assert( prog.p );
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if ( prog.p != progCurrent ) {
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qglUseProgram( prog.p );
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progCurrent = prog.p;
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}
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}
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void GL_Program()
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{
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if ( progCurrent != 0 ) {
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qglUseProgram(0);
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progCurrent = 0;
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}
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}
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static GLSL_Program dynLightProg;
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struct GLSL_DynLightProgramAttribs {
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// vertex shader:
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GLint osEyePos; // 4f, object-space
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GLint osLightPos; // 4f, object-space
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// pixel shader:
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GLint texture; // 2D texture
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GLint lightColorRadius; // 4f, w = 1 / (r^2)
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};
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static GLSL_DynLightProgramAttribs dynLightProgAttribs;
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///////////////////////////////////////////////////////////////
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static void GL2_DynLights_Setup()
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{
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const shaderStage_t* pStage = tess.xstages[tess.shader->lightingStages[ST_DIFFUSE]];
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GL_SelectTexture( 0 );
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R_BindAnimatedImage( &pStage->bundle );
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}
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static void GL2_DynLights_Lighting()
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{
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backEnd.pc[RB_LIT_VERTICES_LATECULLTEST] += tess.numVertexes;
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int i;
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byte clipBits[SHADER_MAX_VERTEXES];
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const dlight_t* dl = tess.light;
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for ( i = 0; i < tess.numVertexes; ++i ) {
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vec3_t dist;
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VectorSubtract( dl->transformed, tess.xyz[i], dist );
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if ( DotProduct( dist, tess.normal[i] ) <= 0.0 ) {
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clipBits[i] = (byte)-1;
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continue;
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}
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int clip = 0;
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if ( dist[0] > dl->radius ) {
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clip |= 1;
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} else if ( dist[0] < -dl->radius ) {
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clip |= 2;
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}
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if ( dist[1] > dl->radius ) {
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clip |= 4;
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} else if ( dist[1] < -dl->radius ) {
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clip |= 8;
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}
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if ( dist[2] > dl->radius ) {
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clip |= 16;
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} else if ( dist[2] < -dl->radius ) {
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clip |= 32;
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}
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clipBits[i] = clip;
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}
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// build a list of triangles that need light
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int numIndexes = 0;
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unsigned hitIndexes[SHADER_MAX_INDEXES];
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for ( i = 0; i < tess.numIndexes; i += 3 ) {
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int a = tess.indexes[i];
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int b = tess.indexes[i+1];
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int c = tess.indexes[i+2];
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if ( !(clipBits[a] & clipBits[b] & clipBits[c]) ) {
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hitIndexes[numIndexes] = a;
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hitIndexes[numIndexes+1] = b;
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hitIndexes[numIndexes+2] = c;
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numIndexes += 3;
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}
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}
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backEnd.pc[RB_LIT_INDICES_LATECULL_IN] += numIndexes;
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backEnd.pc[RB_LIT_INDICES_LATECULL_OUT] += tess.numIndexes - numIndexes;
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if ( !numIndexes )
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return;
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GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL );
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GL2_DynLights_Setup();
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qglDrawElements( GL_TRIANGLES, numIndexes, GL_INDEX_TYPE, hitIndexes );
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}
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///////////////////////////////////////////////////////////////
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void GL2_DynLights_SetupLight()
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{
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GL_Program( dynLightProg );
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const dlight_t* dl = tess.light;
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vec3_t lightColor;
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VectorCopy( dl->color, lightColor );
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qglUniform4f( dynLightProgAttribs.osLightPos, dl->transformed[0], dl->transformed[1], dl->transformed[2], 0.0f );
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qglUniform4f( dynLightProgAttribs.osEyePos, backEnd.orient.viewOrigin[0], backEnd.orient.viewOrigin[1], backEnd.orient.viewOrigin[2], 0.0f );
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qglUniform4f( dynLightProgAttribs.lightColorRadius, lightColor[0], lightColor[1], lightColor[2], 1.0f / Square(dl->radius) );
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qglUniform1i( dynLightProgAttribs.texture, 0 ); // we use texture unit 0
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}
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static void GL2_DynLights_LightingPass()
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{
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if (tess.shader->lightingStages[ST_DIFFUSE] == -1)
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return;
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RB_DeformTessGeometry();
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GL_Cull( tess.shader->cullType );
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const shaderStage_t* pStage = tess.xstages[ tess.shader->lightingStages[ST_DIFFUSE] ];
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R_ComputeTexCoords( pStage, tess.svars );
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// since this is guaranteed to be a single pass, fill and lock all the arrays
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qglDisableClientState( GL_COLOR_ARRAY );
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qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
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qglTexCoordPointer( 2, GL_FLOAT, 0, tess.svars.texcoords );
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qglEnableClientState( GL_NORMAL_ARRAY );
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qglNormalPointer( GL_FLOAT, 16, tess.normal );
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qglVertexPointer( 3, GL_FLOAT, 16, tess.xyz );
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qglLockArraysEXT( 0, tess.numVertexes );
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GL2_DynLights_Lighting();
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qglUnlockArraysEXT();
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qglDisableClientState( GL_NORMAL_ARRAY );
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}
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///////////////////////////////////////////////////////////////
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// returns qtrue if needs to break early
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static qbool GL2_DynLights_MultitextureStage( int stage )
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{
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static stageVars_t svarsMT; // this is a huge struct
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const shaderStage_t* pPrevStage = tess.xstages[stage++];
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const shaderStage_t* pStage = tess.xstages[stage];
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const qbool lightmapOnly = r_lightmap->integer && (pStage->type == ST_LIGHTMAP || pPrevStage->type == ST_LIGHTMAP);
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if ( lightmapOnly ) {
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if ( pStage->type == ST_LIGHTMAP ) {
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R_BindAnimatedImage( &pStage->bundle );
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R_ComputeTexCoords( pStage, svarsMT );
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qglTexCoordPointer( 2, GL_FLOAT, 0, svarsMT.texcoords );
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}
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qglDrawElements( GL_TRIANGLES, tess.numIndexes, GL_INDEX_TYPE, tess.indexes );
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return qtrue;
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}
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if ( r_fullbright->integer ) {
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if ( pStage->type == ST_LIGHTMAP ) {
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Com_Memset( tess.svars.colors, tr.identityLightByte, tess.numVertexes * 4 );
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qglDrawElements( GL_TRIANGLES, tess.numIndexes, GL_INDEX_TYPE, tess.indexes );
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return qfalse;
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} else if ( pPrevStage->type == ST_LIGHTMAP ) {
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Com_Memset( tess.svars.colors, tr.identityLightByte, tess.numVertexes * 4 );
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R_BindAnimatedImage( &pStage->bundle );
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R_ComputeTexCoords( pStage, svarsMT );
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qglTexCoordPointer( 2, GL_FLOAT, 0, svarsMT.texcoords );
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qglDrawElements( GL_TRIANGLES, tess.numIndexes, GL_INDEX_TYPE, tess.indexes );
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return qfalse;
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}
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}
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GL_SelectTexture( 1 );
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qglEnable( GL_TEXTURE_2D );
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GL_TexEnv( pStage->mtEnv );
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R_BindAnimatedImage( &pStage->bundle );
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R_ComputeTexCoords( pStage, svarsMT );
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qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
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qglTexCoordPointer( 2, GL_FLOAT, 0, svarsMT.texcoords );
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qglDrawElements( GL_TRIANGLES, tess.numIndexes, GL_INDEX_TYPE, tess.indexes );
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qglDisable( GL_TEXTURE_2D );
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GL_SelectTexture( 0 );
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return qfalse;
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}
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void GL2_DynLights_StageIterator()
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{
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if (tess.pass == shaderCommands_t::TP_LIGHT) {
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GL2_DynLights_LightingPass();
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return;
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}
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GL_Program();
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RB_DeformTessGeometry();
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GL_Cull( tess.shader->cullType );
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if ( tess.shader->polygonOffset )
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qglEnable( GL_POLYGON_OFFSET_FILL );
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// geometry is per-shader and can be compiled
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// color and tc are per-stage, and can't
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qglDisableClientState( GL_COLOR_ARRAY );
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qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
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qglVertexPointer( 3, GL_FLOAT, 16, tess.xyz ); // padded for SIMD
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qglLockArraysEXT( 0, tess.numVertexes );
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qglEnableClientState( GL_COLOR_ARRAY );
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qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.svars.colors );
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qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
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qglTexCoordPointer( 2, GL_FLOAT, 0, tess.svars.texcoords );
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for ( int stage = 0; stage < tess.shader->numStages; ++stage ) {
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const shaderStage_t* pStage = tess.xstages[stage];
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R_ComputeColors( pStage, tess.svars );
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R_ComputeTexCoords( pStage, tess.svars );
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R_BindAnimatedImage( &pStage->bundle );
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GL_State( pStage->stateBits );
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// !!! FUCKING ati drivers incorrectly need this
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// they're locking+pulling the color array even tho it was explicitly NOT locked
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// so color changes are ignored unless we "update" the color pointer again
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qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.svars.colors );
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qglTexCoordPointer( 2, GL_FLOAT, 0, tess.svars.texcoords );
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if ( pStage->mtStages ) {
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// we can't really cope with massive collapses, so
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assert( pStage->mtStages == 1 );
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if ( GL2_DynLights_MultitextureStage( stage ) )
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break;
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stage += pStage->mtStages;
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continue;
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}
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qglDrawElements( GL_TRIANGLES, tess.numIndexes, GL_INDEX_TYPE, tess.indexes );
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}
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if ( tess.fogNum && tess.shader->fogPass )
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RB_FogPass();
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qglUnlockArraysEXT();
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if ( tess.shader->polygonOffset )
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qglDisable( GL_POLYGON_OFFSET_FILL );
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}
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///////////////////////////////////////////////////////////////
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static qbool GL2_CreateShader( GLuint* shaderPtr, GLenum shaderType, const char* shaderSource )
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{
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GLuint shader = qglCreateShader( shaderType );
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qglShaderSource( shader, 1, &shaderSource, NULL );
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qglCompileShader( shader );
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GLint result = GL_FALSE;
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qglGetShaderiv( shader, GL_COMPILE_STATUS, &result );
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if ( result == GL_TRUE ) {
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*shaderPtr = shader;
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return qtrue;
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}
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GLint logLength = 0;
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qglGetShaderiv( shader, GL_INFO_LOG_LENGTH, &logLength );
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static char log[1024];
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qglGetShaderInfoLog( shader, logLength, NULL, log );
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Com_Printf( "ERROR: %s shader: %s", shaderType == GL_VERTEX_SHADER ? "vertex" : "fragment", log );
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return qfalse;
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}
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static qbool GL2_CreateProgram( GLSL_Program& prog, const char* vs, const char* fs )
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{
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if ( !GL2_CreateShader( &prog.vs, GL_VERTEX_SHADER, vs ) )
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return qfalse;
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if ( !GL2_CreateShader( &prog.fs, GL_FRAGMENT_SHADER, fs ) )
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return qfalse;
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prog.p = qglCreateProgram();
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qglAttachShader( prog.p, prog.vs );
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qglAttachShader( prog.p, prog.fs );
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qglLinkProgram( prog.p );
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return qtrue;
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}
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// We don't use "gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;"
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// because most everything is rendered using the fixed function pipeline and
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// ftransform makes sure we get matching results (and thus avoid Z-fighting).
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static const char* dynLightVS =
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"uniform vec4 osLightPos;\n"
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"uniform vec4 osEyePos;\n"
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"varying vec4 L;\n" // object-space light vector
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"varying vec4 V;\n" // object-space view vector
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"varying vec3 nN;\n" // normalized object-space normal vector
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"\n"
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"void main()\n"
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"{\n"
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" gl_Position = ftransform();\n"
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" gl_TexCoord[0] = gl_MultiTexCoord0;\n"
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" L = osLightPos - gl_Vertex;\n"
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" V = osEyePos - gl_Vertex;\n"
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" nN = gl_Normal;\n"
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"}\n"
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"";
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static const char* dynLightFS =
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"uniform sampler2D texture;\n"
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"uniform vec4 lightColorRadius;" // w = 1 / (r^2)
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"varying vec4 L;\n" // object-space light vector
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"varying vec4 V;\n" // object-space view vector
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"varying vec3 nN;\n" // normalized object-space normal vector
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"\n"
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"void main()\n"
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"{\n"
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" vec4 base = texture2D(texture, gl_TexCoord[0].xy);\n"
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" vec3 nL = normalize(L.xyz);\n" // normalized light vector
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" vec3 nV = normalize(V.xyz);\n" // normalized view vector
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// light intensity
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" float intensFactor = dot(L.xyz, L.xyz) * lightColorRadius.w;"
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" vec3 intens = lightColorRadius.rgb * (1.0 - intensFactor);\n"
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// specular reflection term (N.H)
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" float specFactor = clamp(dot(nN, normalize(nL + nV)), 0.0, 1.0);\n"
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" float spec = pow(specFactor, 16.0) * 0.25;\n"
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// Lambertian diffuse reflection term (N.L)
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" float diffuse = clamp(dot(nN, nL), 0.0, 1.0);\n"
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" gl_FragColor = (base * vec4(diffuse) + vec4(spec)) * vec4(intens, 1.0);\n"
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"}\n"
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"";
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struct FrameBuffer {
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GLuint fbo;
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GLuint color; // texture if MS, buffer if SS
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GLuint depthStencil; // texture if MS, buffer if SS
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qbool multiSampled;
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qbool hasDepthStencil;
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};
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static FrameBuffer frameBufferMain;
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static FrameBuffer frameBuffersPostProcess[2];
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static unsigned int frameBufferReadIndex = 0; // read this for the latest color/depth data
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static qbool frameBufferMultiSampling = qfalse;
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#define CASE( x ) case x: return #x
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#define GL( call ) call; GL2_CheckError( #call, __FUNCTION__, __FILE__, __LINE__ )
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static const char* GL2_GetErrorString( GLenum ec )
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{
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switch ( ec )
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{
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CASE( GL_NO_ERROR );
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CASE( GL_INVALID_ENUM );
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CASE( GL_INVALID_VALUE );
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CASE( GL_INVALID_OPERATION );
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CASE( GL_INVALID_FRAMEBUFFER_OPERATION );
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CASE( GL_OUT_OF_MEMORY );
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CASE( GL_STACK_UNDERFLOW );
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CASE( GL_STACK_OVERFLOW );
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default: return "?";
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}
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}
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static void GL2_CheckError( const char* call, const char* function, const char* file, int line )
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{
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const GLenum ec = qglGetError();
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if ( ec == GL_NO_ERROR )
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return;
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const char* fileName = file;
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while ( *file )
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{
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if ( *file == '/' || *file == '\\' )
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fileName = file + 1;
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++file;
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}
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Com_Printf( "%s failed\n", call );
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Com_Printf( "%s:%d in %s\n", fileName, line, function );
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Com_Printf( "Error code: 0x%X (%d)\n", (unsigned int)ec, (int)ec );
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Com_Printf( "Error message: %s\n", GL2_GetErrorString(ec) );
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}
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static const char* GL2_GetFBOStatusString( GLenum status )
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{
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switch ( status )
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{
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CASE( GL_FRAMEBUFFER_COMPLETE );
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CASE( GL_FRAMEBUFFER_UNDEFINED );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER );
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CASE( GL_FRAMEBUFFER_UNSUPPORTED );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE );
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CASE( GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS );
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default: return "?";
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}
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}
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#undef CASE
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static qbool GL2_FBO_CreateSS( FrameBuffer& fb, qbool depthStencil )
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{
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while ( qglGetError() != GL_NO_ERROR ) {} // clear the error queue
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if ( depthStencil )
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{
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GL(qglGenTextures( 1, &fb.depthStencil ));
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GL(qglBindTexture( GL_TEXTURE_2D, fb.depthStencil ));
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GL(qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ));
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GL(qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ));
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GL(qglTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, glConfig.vidWidth, glConfig.vidHeight, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL ));
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}
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GL(qglGenTextures( 1, &fb.color ));
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GL(qglBindTexture( GL_TEXTURE_2D, fb.color ));
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GL(qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ));
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GL(qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ));
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GL(qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, glConfig.vidWidth, glConfig.vidHeight, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL ));
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GL(qglGenFramebuffers( 1, &fb.fbo ));
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GL(qglBindFramebuffer( GL_FRAMEBUFFER, fb.fbo ));
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GL(qglFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb.color, 0 ));
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|
if ( depthStencil )
|
|
GL(qglFramebufferTexture2D( GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, fb.depthStencil, 0 ));
|
|
|
|
const GLenum fboStatus = qglCheckFramebufferStatus( GL_FRAMEBUFFER );
|
|
if ( fboStatus != GL_FRAMEBUFFER_COMPLETE )
|
|
{
|
|
Com_Printf( "Failed to create FBO (status 0x%X, error 0x%X)\n", (unsigned int)fboStatus, (unsigned int)qglGetError() );
|
|
Com_Printf( "FBO status string: %s\n", GL2_GetFBOStatusString(fboStatus) );
|
|
return qfalse;
|
|
}
|
|
|
|
qglBindFramebuffer( GL_FRAMEBUFFER, 0 );
|
|
fb.multiSampled = qfalse;
|
|
fb.hasDepthStencil = depthStencil;
|
|
|
|
return qtrue;
|
|
}
|
|
|
|
|
|
static qbool GL2_FBO_CreateMS( FrameBuffer& fb )
|
|
{
|
|
while ( qglGetError() != GL_NO_ERROR ) {} // clear the error queue
|
|
|
|
GL(qglGenFramebuffers( 1, &fb.fbo ));
|
|
GL(qglBindFramebuffer( GL_FRAMEBUFFER, fb.fbo ));
|
|
|
|
GL(qglGenRenderbuffers( 1, &fb.color ));
|
|
GL(qglBindRenderbuffer( GL_RENDERBUFFER, fb.color ));
|
|
GL(qglRenderbufferStorageMultisample( GL_RENDERBUFFER, 4, GL_RGBA8, glConfig.vidWidth, glConfig.vidHeight ));
|
|
GL(qglFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, fb.color ));
|
|
|
|
GL(qglGenRenderbuffers( 1, &fb.depthStencil ));
|
|
GL(qglBindRenderbuffer( GL_RENDERBUFFER, fb.depthStencil ));
|
|
GL(qglRenderbufferStorageMultisample( GL_RENDERBUFFER, 4, GL_DEPTH24_STENCIL8, glConfig.vidWidth, glConfig.vidHeight ));
|
|
|
|
GL(qglFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, fb.color ));
|
|
GL(qglFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, fb.depthStencil ));
|
|
|
|
const GLenum fboStatus = qglCheckFramebufferStatus( GL_FRAMEBUFFER );
|
|
if ( fboStatus != GL_FRAMEBUFFER_COMPLETE )
|
|
{
|
|
Com_Printf( "Failed to create FBO (status 0x%X, error 0x%X)\n", (unsigned int)fboStatus, (unsigned int)qglGetError() );
|
|
Com_Printf( "FBO status string: %s\n", GL2_GetFBOStatusString(fboStatus) );
|
|
return qfalse;
|
|
}
|
|
|
|
qglBindFramebuffer( GL_FRAMEBUFFER, 0 );
|
|
fb.multiSampled = qtrue;
|
|
fb.hasDepthStencil = qtrue;
|
|
|
|
return qtrue;
|
|
}
|
|
|
|
|
|
static qbool GL2_FBO_Init()
|
|
{
|
|
const int msaa = r_msaa->integer;
|
|
const qbool validOption = msaa >= 2 && msaa <= 16;
|
|
const qbool enable = validOption && qglRenderbufferStorageMultisample != NULL;
|
|
frameBufferMultiSampling = enable;
|
|
if ( validOption && !enable )
|
|
Com_Printf( "Warning: MSAA requested but disabled because glRenderbufferStorageMultisample wasn't found\n" );
|
|
|
|
if ( !enable )
|
|
return GL2_FBO_CreateSS( frameBuffersPostProcess[0], qtrue ) &&
|
|
GL2_FBO_CreateSS( frameBuffersPostProcess[1], qtrue );
|
|
|
|
return GL2_FBO_CreateMS( frameBufferMain ) &&
|
|
GL2_FBO_CreateSS( frameBuffersPostProcess[0], qfalse ) &&
|
|
GL2_FBO_CreateSS( frameBuffersPostProcess[1], qfalse );
|
|
}
|
|
|
|
|
|
static void GL2_FBO_Bind( const FrameBuffer& fb )
|
|
{
|
|
qglBindFramebuffer( GL_FRAMEBUFFER, fb.fbo );
|
|
qglReadBuffer( GL_COLOR_ATTACHMENT0 );
|
|
qglDrawBuffer( GL_COLOR_ATTACHMENT0 );
|
|
}
|
|
|
|
|
|
static void GL2_FBO_Bind()
|
|
{
|
|
GL2_FBO_Bind( frameBuffersPostProcess[frameBufferReadIndex] );
|
|
}
|
|
|
|
|
|
static void GL2_FBO_Swap()
|
|
{
|
|
frameBufferReadIndex ^= 1;
|
|
}
|
|
|
|
|
|
static void GL2_FBO_BlitSSToBackBuffer()
|
|
{
|
|
const FrameBuffer& fbo = frameBuffersPostProcess[frameBufferReadIndex];
|
|
qglBindFramebuffer( GL_READ_FRAMEBUFFER, fbo.fbo );
|
|
qglBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 );
|
|
qglReadBuffer( GL_COLOR_ATTACHMENT0 );
|
|
qglDrawBuffer( GL_BACK );
|
|
|
|
const int w = glConfig.vidWidth;
|
|
const int h = glConfig.vidHeight;
|
|
qglBlitFramebuffer( 0, 0, w, h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_LINEAR );
|
|
}
|
|
|
|
|
|
static void GL2_FBO_BlitMSToSS()
|
|
{
|
|
const FrameBuffer& r = frameBufferMain;
|
|
const FrameBuffer& d = frameBuffersPostProcess[frameBufferReadIndex];
|
|
qglBindFramebuffer( GL_READ_FRAMEBUFFER, r.fbo );
|
|
qglBindFramebuffer( GL_DRAW_FRAMEBUFFER, d.fbo );
|
|
qglReadBuffer( GL_COLOR_ATTACHMENT0 );
|
|
qglDrawBuffer( GL_COLOR_ATTACHMENT0 );
|
|
|
|
const int w = glConfig.vidWidth;
|
|
const int h = glConfig.vidHeight;
|
|
qglBlitFramebuffer( 0, 0, w, h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_LINEAR );
|
|
}
|
|
|
|
|
|
static void GL2_FullScreenQuad()
|
|
{
|
|
const float w = glConfig.vidWidth;
|
|
const float h = glConfig.vidHeight;
|
|
qglBegin( GL_QUADS );
|
|
qglTexCoord2f( 0.0f, 0.0f );
|
|
qglVertex2f( 0.0f, h );
|
|
qglTexCoord2f( 0.0f, 1.0f );
|
|
qglVertex2f( 0.0f, 0.0f );
|
|
qglTexCoord2f( 1.0f, 1.0f );
|
|
qglVertex2f( w, 0.0f );
|
|
qglTexCoord2f( 1.0f, 0.0f );
|
|
qglVertex2f( w, h );
|
|
qglEnd();
|
|
}
|
|
|
|
|
|
static GLSL_Program gammaProg;
|
|
|
|
struct GLSL_GammaProgramAttribs
|
|
{
|
|
int texture;
|
|
int gammaOverbright;
|
|
};
|
|
|
|
static GLSL_GammaProgramAttribs gammaProgAttribs;
|
|
|
|
|
|
static void GL2_PostProcessGamma()
|
|
{
|
|
const int obBits = r_overBrightBits->integer;
|
|
const float obScale = (float)( 1 << obBits );
|
|
const float gamma = 1.0f / r_gamma->value;
|
|
|
|
if ( gamma == 1.0f && obBits == 0 )
|
|
return;
|
|
|
|
GL2_FBO_Swap();
|
|
GL2_FBO_Bind();
|
|
|
|
GL_Program( gammaProg );
|
|
qglUniform1i( gammaProgAttribs.texture, 0 ); // we use texture unit 0
|
|
qglUniform4f( gammaProgAttribs.gammaOverbright, gamma, gamma, gamma, obScale );
|
|
GL_SelectTexture( 0 );
|
|
qglBindTexture( GL_TEXTURE_2D, frameBuffersPostProcess[frameBufferReadIndex ^ 1].color );
|
|
GL2_FullScreenQuad();
|
|
}
|
|
|
|
|
|
static const char* gammaVS =
|
|
"void main()\n"
|
|
"{\n"
|
|
" gl_Position = ftransform();\n"
|
|
" gl_TexCoord[0] = gl_MultiTexCoord0;\n"
|
|
"}\n"
|
|
"";
|
|
|
|
static const char* gammaFS =
|
|
"uniform sampler2D texture;\n"
|
|
"uniform vec4 gammaOverbright;\n"
|
|
"\n"
|
|
"void main()\n"
|
|
"{\n"
|
|
" vec3 base = texture2D(texture, gl_TexCoord[0].xy).rgb;\n"
|
|
" gl_FragColor = vec4(pow(base, gammaOverbright.xyz) * gammaOverbright.w, 1.0);\n"
|
|
"}\n"
|
|
"";
|
|
|
|
|
|
static GLSL_Program greyscaleProg;
|
|
|
|
struct GLSL_GreyscaleProgramAttribs
|
|
{
|
|
int texture;
|
|
int greyscale;
|
|
};
|
|
|
|
static GLSL_GreyscaleProgramAttribs greyscaleProgAttribs;
|
|
static qbool greyscaleProgramValid = qfalse;
|
|
|
|
|
|
static void GL2_PostProcessGreyscale()
|
|
{
|
|
if ( !greyscaleProgramValid )
|
|
return;
|
|
|
|
const float greyscale = Com_Clamp( 0.0f, 1.0f, r_greyscale->value );
|
|
if ( greyscale == 0.0f )
|
|
return;
|
|
|
|
GL2_FBO_Swap();
|
|
GL2_FBO_Bind();
|
|
|
|
GL_Program( greyscaleProg );
|
|
qglUniform1i( greyscaleProgAttribs.texture, 0 ); // we use texture unit 0
|
|
qglUniform1f( greyscaleProgAttribs.greyscale, greyscale );
|
|
GL_SelectTexture( 0 );
|
|
qglBindTexture( GL_TEXTURE_2D, frameBuffersPostProcess[frameBufferReadIndex ^ 1].color );
|
|
GL2_FullScreenQuad();
|
|
}
|
|
|
|
|
|
static const char* greyscaleVS =
|
|
"void main()\n"
|
|
"{\n"
|
|
" gl_Position = ftransform();\n"
|
|
" gl_TexCoord[0] = gl_MultiTexCoord0;\n"
|
|
"}\n"
|
|
"";
|
|
|
|
static const char* greyscaleFS =
|
|
"uniform sampler2D texture;\n"
|
|
"uniform float greyscale;\n"
|
|
"\n"
|
|
"void main()\n"
|
|
"{\n"
|
|
" vec3 base = texture2D(texture, gl_TexCoord[0].xy).rgb;\n"
|
|
" vec3 grey = vec3(0.299 * base.r + 0.587 * base.g + 0.114 * base.b);\n"
|
|
" gl_FragColor = vec4(mix(base, grey, greyscale), 1.0);\n"
|
|
"}\n"
|
|
"";
|
|
|
|
|
|
qbool QGL_InitGL2()
|
|
{
|
|
if ( !GL2_FBO_Init() ) {
|
|
Com_Printf( "ERROR: failed to create framebuffer objects\n" );
|
|
return qfalse;
|
|
}
|
|
|
|
if ( !GL2_CreateProgram( dynLightProg, dynLightVS, dynLightFS ) ) {
|
|
Com_Printf( "ERROR: failed to compile dynamic light shaders\n" );
|
|
return qfalse;
|
|
}
|
|
dynLightProgAttribs.osEyePos = qglGetUniformLocation( dynLightProg.p, "osEyePos" );
|
|
dynLightProgAttribs.osLightPos = qglGetUniformLocation( dynLightProg.p, "osLightPos" );
|
|
dynLightProgAttribs.texture = qglGetUniformLocation( dynLightProg.p, "texture" );
|
|
dynLightProgAttribs.lightColorRadius = qglGetUniformLocation( dynLightProg.p, "lightColorRadius" );
|
|
|
|
if ( !GL2_CreateProgram( gammaProg, gammaVS, gammaFS ) ) {
|
|
Com_Printf( "ERROR: failed to compile gamma correction shaders\n" );
|
|
return qfalse;
|
|
}
|
|
gammaProgAttribs.texture = qglGetUniformLocation( gammaProg.p, "texture" );
|
|
gammaProgAttribs.gammaOverbright = qglGetUniformLocation( gammaProg.p, "gammaOverbright" );
|
|
|
|
greyscaleProgramValid = GL2_CreateProgram( greyscaleProg, greyscaleVS, greyscaleFS );
|
|
if ( greyscaleProgramValid ) {
|
|
greyscaleProgAttribs.texture = qglGetUniformLocation( greyscaleProg.p, "texture" );
|
|
greyscaleProgAttribs.greyscale = qglGetUniformLocation( greyscaleProg.p, "greyscale" );
|
|
} else {
|
|
Com_Printf( "ERROR: failed to compile greyscale shaders\n" );
|
|
}
|
|
|
|
return qtrue;
|
|
}
|
|
|
|
|
|
void GL2_BeginFrame()
|
|
{
|
|
if ( frameBufferMultiSampling )
|
|
GL2_FBO_Bind( frameBufferMain );
|
|
else
|
|
GL2_FBO_Bind();
|
|
|
|
GL_Program();
|
|
}
|
|
|
|
|
|
void GL2_EndFrame()
|
|
{
|
|
if ( frameBufferMultiSampling )
|
|
GL2_FBO_BlitMSToSS();
|
|
|
|
GL2_PostProcessGamma();
|
|
GL2_PostProcessGreyscale();
|
|
|
|
// needed for later calls to GL_Bind because
|
|
// the above functions use qglBindTexture directly
|
|
glState.texID[glState.currenttmu] = 0;
|
|
|
|
GL2_FBO_BlitSSToBackBuffer();
|
|
}
|
|
|