/*
==================
RB_NV20_DiffuseColorFragment
==================
*/
static void RB_NV20_DiffuseColorFragment(void)
{
if (r_useCombinerDisplayLists.GetBool()) {
qglCallList(fragmentDisplayListBase + FPROG_DIFFUSE_COLOR);
return;
}
// program the nvidia register combiners
qglCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 1);
// stage 0 is free, so we always do the multiply of the vertex color
// when the vertex color is inverted, qglCombinerInputNV(GL_VARIABLE_B_NV) will be changed
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER0_NV, GL_RGB,
GL_TEXTURE0_ARB, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
qglCombinerOutputNV(GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// for GL_CONSTANT_COLOR0_NV * TEXTURE0 * TEXTURE1
qglFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_CONSTANT_COLOR0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_E_TIMES_F_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_E_NV, GL_TEXTURE0_ARB,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_F_NV, GL_TEXTURE1_ARB,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
}
/*
==================
RB_RenderInteraction
backEnd.vLight
backEnd.lightScale
backEnd.depthFunc must be equal for alpha tested surfaces to work right,
it is set to lessThan for blended transparent surfaces
This expects a bumpmap stage before a diffuse stage before a specular stage
The material code is responsible for guaranteeing that, but conditional stages
can still make it invalid.
you can't blend two bumpmaps, but you can change bump maps between
blended diffuse / specular maps to get the same effect
==================
*/
static void RB_RenderInteraction( const drawSurf_t *surf ) {
const idMaterial *surfaceShader = surf->material;
const float *surfaceRegs = surf->shaderRegisters;
const viewLight_t *vLight = backEnd.vLight;
const idMaterial *lightShader = vLight->lightShader;
const float *lightRegs = vLight->shaderRegisters;
static idPlane lightProject[4]; // reused across function calls
const srfTriangles_t *tri = surf->geo;
const shaderStage_t *lastBumpStage = NULL;
RB_LogComment( "---------- RB_RenderInteraction %s on %s ----------\n",
lightShader->GetName(), surfaceShader->GetName() );
// change the matrix and light projection vectors if needed
if ( surf->space != backEnd.currentSpace ) {
backEnd.currentSpace = surf->space;
qglLoadMatrixf( surf->space->modelViewMatrix );
for ( int i = 0 ; i < 4 ; i++ ) {
R_GlobalPlaneToLocal( surf->space->modelMatrix, backEnd.vLight->lightProject[i], lightProject[i] );
}
}
// change the scissor if needed
if ( r_useScissor.GetBool() && !backEnd.currentScissor.Equals( surf->scissorRect ) ) {
backEnd.currentScissor = surf->scissorRect;
qglScissor( backEnd.viewDef->viewport.x1 + backEnd.currentScissor.x1,
backEnd.viewDef->viewport.y1 + backEnd.currentScissor.y1,
backEnd.currentScissor.x2 + 1 - backEnd.currentScissor.x1,
backEnd.currentScissor.y2 + 1 - backEnd.currentScissor.y1 );
}
// hack depth range if needed
if ( surf->space->weaponDepthHack ) {
RB_EnterWeaponDepthHack();
}
if ( surf->space->modelDepthHack != 0.0f ) {
RB_EnterModelDepthHack( surf->space->modelDepthHack );
}
// set the vertex arrays, which may not all be enabled on a given pass
idDrawVert *ac = (idDrawVert *)vertexCache.Position(tri->ambientCache);
qglVertexPointer( 3, GL_FLOAT, sizeof( idDrawVert ), ac->xyz.ToFloatPtr() );
GL_SelectTexture( 0 );
qglTexCoordPointer( 2, GL_FLOAT, sizeof( idDrawVert ), ac->st.ToFloatPtr() );
qglColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( idDrawVert ), ac->color );
// go through the individual stages
for ( int i = 0 ; i < surfaceShader->GetNumStages() ; i++ ) {
const shaderStage_t *surfaceStage = surfaceShader->GetStage( i );
// ignore ambient stages while drawing interactions
if ( surfaceStage->lighting == SL_AMBIENT ) {
continue;
}
// ignore stages that fail the condition
if ( !surfaceRegs[ surfaceStage->conditionRegister ] ) {
continue;
}
//-----------------------------------------------------
//
// bump / falloff
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_BUMP ) {
// render light falloff * bumpmap lighting
if ( surfaceStage->vertexColor != SVC_IGNORE ) {
common->Printf( "shader %s: vertexColor on a bump stage\n",
surfaceShader->GetName() );
}
// check for RGBA modulations in the stage, which are also illegal?
// save the bump map stage for the specular calculation and diffuse
// error checking
lastBumpStage = surfaceStage;
//
// ambient lights combine non-directional bump and falloff
// and write to the alpha channel
//
if ( lightShader->IsAmbientLight() ) {
GL_State( GLS_COLORMASK | GLS_DEPTHMASK | backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// development aid
if ( r_skipBump.GetBool() ) {
globalImages->flatNormalMap->Bind();
}
// texture 1 will be the light falloff
GL_SelectTexture( 1 );
qglEnable( GL_TEXTURE_GEN_S );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[3].ToFloatPtr() );
qglTexCoord2f( 0, 0.5 );
vLight->falloffImage->Bind();
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 2 );
// set the constant color to a bit of an angle
qglCombinerParameterfvNV( GL_CONSTANT_COLOR0_NV, tr.ambientLightVector.ToFloatPtr() );
// stage 0 sets primary_color = bump dot constant color
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_CONSTANT_COLOR0_NV, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE );
// stage 1 alpha sets primary_color = primary_color * falloff
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV,
GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
qglCombinerOutputNV( GL_COMBINER1_NV, GL_ALPHA,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner takes the result for the alpha channel
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisable( GL_TEXTURE_GEN_S );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
//
// draw light falloff to the alpha channel
//
GL_State( GLS_COLORMASK | GLS_DEPTHMASK | backEnd.depthFunc );
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglDisableClientState( GL_COLOR_ARRAY );
qglEnable( GL_TEXTURE_GEN_S );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[3].ToFloatPtr() );
qglTexCoord2f( 0, 0.5 );
vLight->falloffImage->Bind();
// make sure a combiner output doesn't step on the texture
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_TEXTURE0_ARB,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
qglDisable( GL_TEXTURE_GEN_S );
//
// draw the bump map result onto the alpha channel
//
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_ZERO | GLS_COLORMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// texture 1 is the normalization cube map
// the texccords are the non-normalized vector towards the light origin
GL_SelectTexture( 1 );
globalImages->normalCubeMapImage->Bind();
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
qglTexCoordPointer( 3, GL_FLOAT, sizeof( lightingCache_t ), ((lightingCache_t *)vertexCache.Position(tri->lightingCache))->localLightVector.ToFloatPtr() );
qglDisableClientState( GL_COLOR_ARRAY );
// program the nvidia register combiners
// I just want alpha = Dot( texture0, texture1 )
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
// stage 0 rgb performs the dot product
// SPARE0 = TEXTURE0 dot TEXTURE1
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE );
// final combiner just takes the dot result and puts it in alpha
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
if ( surfaceStage->lighting == SL_DIFFUSE ) {
if ( !lastBumpStage ) {
common->Printf( "shader %s: diffuse stage without a preceeding bumpmap stage\n",
surfaceShader->GetName() );
continue;
}
}
//-----------------------------------------------------
//
// specular exponent modification of the bump / falloff
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_SPECULAR ) {
// put specular bump map into alpha channel, then treat as a diffuse
// allow the specular to be skipped as a user speed optimization
if ( r_skipSpecular.GetBool() ) {
continue;
}
// ambient lights don't have specular
if ( lightShader->IsAmbientLight() ) {
continue;
}
if ( !lastBumpStage ) {
common->Printf( "shader %s: specular stage without a preceeding bumpmap stage\n",
surfaceShader->GetName() );
continue;
}
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_SRC_ALPHA | GLS_COLORMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &lastBumpStage->texture, surf );
// development aid
if ( r_skipBump.GetBool() ) {
globalImages->flatNormalMap->Bind();
}
// texture 1 is the normalization cube map
// indexed by the dynamic halfangle texcoords
GL_SelectTexture( 1 );
globalImages->normalCubeMapImage->Bind();
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
qglTexCoordPointer( 4, GL_FLOAT, 0, vertexCache.Position( surf->dynamicTexCoords ) );
// program the nvidia register combiners
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 2 );
// stage 0 rgb performs the dot product
// GL_PRIMARY_COLOR_NV = ( TEXTURE0 dot TEXTURE1 - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_TRUE, GL_FALSE, GL_FALSE );
// stage 0 alpha does nothing
qglCombinerOutputNV( GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// stage 1 rgb does nothing
qglCombinerOutputNV( GL_COMBINER1_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// stage 1 alpha takes bump * bump
// PRIMARY_COLOR = ( GL_PRIMARY_COLOR_NV * GL_PRIMARY_COLOR_NV - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerOutputNV( GL_COMBINER1_NV, GL_ALPHA,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &lastBumpStage->texture, surf );
// the bump map in the alpha channel is now corrupted, so a normal diffuse
// map can't be drawn unless a new bumpmap is put down
lastBumpStage = NULL;
// fall through to the common handling of diffuse and specular projected lighting
}
//-----------------------------------------------------
//
// projected light / surface color for diffuse and specular maps
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_DIFFUSE || surfaceStage->lighting == SL_SPECULAR ) {
// don't trash alpha
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_ONE | GLS_ALPHAMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will get the surface color texture
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// development aid
if ( ( surfaceStage->lighting == SL_DIFFUSE && r_skipDiffuse.GetBool() )
|| ( surfaceStage->lighting == SL_SPECULAR && r_skipSpecular.GetBool() ) ) {
globalImages->blackImage->Bind();
}
// texture 1 will get the light projected texture
GL_SelectTexture( 1 );
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglEnable( GL_TEXTURE_GEN_S );
qglEnable( GL_TEXTURE_GEN_T );
qglEnable( GL_TEXTURE_GEN_Q );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[0].ToFloatPtr() );
qglTexGenfv( GL_T, GL_OBJECT_PLANE, lightProject[1].ToFloatPtr() );
qglTexGenfv( GL_Q, GL_OBJECT_PLANE, lightProject[2].ToFloatPtr() );
// texture0 * texture1 * primaryColor * constantColor
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
// SPARE0 = TEXTURE0 * PRIMARY_COLOR
// SPARE1 = TEXTURE1 * CONSTANT_COLOR
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
// variable B will be overriden based on the stage vertexColor option
if ( surfaceStage->vertexColor == SVC_MODULATE ) {
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglEnableClientState( GL_COLOR_ARRAY );
} else if ( surfaceStage->vertexColor == SVC_INVERSE_MODULATE ) {
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_INVERT_NV, GL_RGB );
qglEnableClientState( GL_COLOR_ARRAY );
} else { // SVC_IGNORE
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB );
qglDisableClientState( GL_COLOR_ARRAY );
}
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_C_NV,
GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_D_NV,
GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_SPARE1_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_SPARE1_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// for all light stages, multiply the projected color by the surface
// color, and blend with the framebuffer
for ( int j = 0 ; j < lightShader->GetNumStages() ; j++ ) {
const shaderStage_t *lightStage = lightShader->GetStage( j );
float color[4];
// ignore stages that fail the condition
if ( !lightRegs[ lightStage->conditionRegister ] ) {
continue;
}
// set the color to the light color times the surface color
color[0] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[0] ]
* surfaceRegs[ surfaceStage->color.registers[0] ];
color[1] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[1] ]
* surfaceRegs[ surfaceStage->color.registers[1] ];
color[2] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[2] ]
* surfaceRegs[ surfaceStage->color.registers[2] ];
color[3] = 1;
// don't draw if it would be all black
if ( color[0] == 0 && color[1] == 0 && color[2] == 0 ) {
continue;
}
qglCombinerParameterfvNV( GL_CONSTANT_COLOR1_NV, color );
RB_BindStageTexture( lightRegs, &lightStage->texture, surf );
RB_DrawElementsWithCounters( tri );
RB_FinishStageTexture( &lightStage->texture, surf );
}
if ( surfaceStage->vertexColor != SVC_IGNORE ) {
qglDisableClientState( GL_COLOR_ARRAY );
}
qglDisable( GL_TEXTURE_GEN_S );
qglDisable( GL_TEXTURE_GEN_T );
qglDisable( GL_TEXTURE_GEN_Q );
globalImages->BindNull();
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
}
// unhack depth range if needed
if ( surf->space->weaponDepthHack || surf->space->modelDepthHack != 0.0f ) {
RB_LeaveDepthHack();
}
}
/*
==================
RB_NV20_BumpAndLightFragment
==================
*/
static void RB_NV20_BumpAndLightFragment(void)
{
if (r_useCombinerDisplayLists.GetBool()) {
qglCallList(fragmentDisplayListBase + FPROG_BUMP_AND_LIGHT);
return;
}
// program the nvidia register combiners
qglCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 3);
// stage 0 rgb performs the dot product
// SPARE0 = TEXTURE0 dot TEXTURE1
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE);
// stage 1 rgb multiplies texture 2 and 3 together
// SPARE1 = TEXTURE2 * TEXTURE3
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER1_NV, GL_RGB,
GL_SPARE1_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 1 alpha does nohing
// stage 2 color multiplies spare0 * spare 1 just for debugging
// SPARE0 = SPARE0 * SPARE1
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER2_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 2 alpha multiples spare0 * spare 1
// SPARE0 = SPARE0 * SPARE1
qglCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_A_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE);
qglCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_B_NV,
GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE);
qglCombinerOutputNV(GL_COMBINER2_NV, GL_ALPHA,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// final combiner
qglFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
}
/*
==================
RB_NV20_DiffuseAndSpecularColorFragment
==================
*/
static void RB_NV20_DiffuseAndSpecularColorFragment(void)
{
if (r_useCombinerDisplayLists.GetBool()) {
qglCallList(fragmentDisplayListBase + FPROG_DIFFUSE_AND_SPECULAR_COLOR);
return;
}
// program the nvidia register combiners
qglCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 3);
// GL_CONSTANT_COLOR0_NV will be the diffuse color
// GL_CONSTANT_COLOR1_NV will be the specular color
// stage 0 rgb performs the dot product
// GL_SECONDARY_COLOR_NV = ( TEXTURE0 dot TEXTURE1 - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER0_NV, GL_RGB,
GL_SECONDARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_TRUE, GL_FALSE, GL_FALSE);
// stage 0 alpha does nothing
// stage 1 color takes bump * bump
// PRIMARY_COLOR = ( GL_SECONDARY_COLOR_NV * GL_SECONDARY_COLOR_NV - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SECONDARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_SECONDARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER1_NV, GL_RGB,
GL_SECONDARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 1 alpha does nothing
// stage 2 color
// PRIMARY_COLOR = ( PRIMARY_COLOR * TEXTURE3 ) * 2
// SPARE0 = 1.0 * 1.0 (needed for final combiner)
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SECONDARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_C_NV,
GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_D_NV,
GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER2_NV, GL_RGB,
GL_SECONDARY_COLOR_NV, GL_SPARE0_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 2 alpha does nothing
// final combiner = TEXTURE2_ARB * CONSTANT_COLOR0_NV + PRIMARY_COLOR_NV * CONSTANT_COLOR1_NV
// alpha = GL_ZERO
qglFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_CONSTANT_COLOR1_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_SECONDARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_E_TIMES_F_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_E_NV, GL_TEXTURE2_ARB,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_F_NV, GL_CONSTANT_COLOR0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
}
/*
==================
RB_NV20_SpecularColorFragment
==================
*/
static void RB_NV20_SpecularColorFragment(void)
{
if (r_useCombinerDisplayLists.GetBool()) {
qglCallList(fragmentDisplayListBase + FPROG_SPECULAR_COLOR);
return;
}
// program the nvidia register combiners
qglCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 4);
// we want GL_CONSTANT_COLOR1_NV * PRIMARY_COLOR * TEXTURE2 * TEXTURE3 * specular( TEXTURE0 * TEXTURE1 )
// stage 0 rgb performs the dot product
// GL_SPARE0_NV = ( TEXTURE0 dot TEXTURE1 - 0.5 ) * 2
// TEXTURE2 = TEXTURE2 * PRIMARY_COLOR
// the scale and bias steepen the specular curve
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_TRUE, GL_FALSE, GL_FALSE);
// stage 0 alpha does nothing
// stage 1 color takes bump * bump
// GL_SPARE0_NV = ( GL_SPARE0_NV * GL_SPARE0_NV - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER1_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 1 alpha does nothing
// stage 2 color
// GL_SPARE0_NV = GL_SPARE0_NV * TEXTURE3
// SECONDARY_COLOR = CONSTANT_COLOR * TEXTURE2
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_C_NV,
GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_D_NV,
GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER2_NV, GL_RGB,
GL_SPARE0_NV, GL_SECONDARY_COLOR_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 2 alpha does nothing
// stage 3 scales the texture by the vertex color
qglCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_SECONDARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglCombinerOutputNV(GL_COMBINER3_NV, GL_RGB,
GL_SECONDARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
// stage 3 alpha does nothing
// final combiner = GL_SPARE0_NV * SECONDARY_COLOR + PRIMARY_COLOR * SECONDARY_COLOR
qglFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_SECONDARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_E_TIMES_F_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_E_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_F_NV, GL_SECONDARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB);
qglFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
}
