/*
==================
GL_DepthBounds
==================
*/
void GL_DepthBounds (float min, float max){
if (glState.depthBoundsMin == min && glState.depthBoundsMax == max)
return;
glState.depthBoundsMin = min;
glState.depthBoundsMax = max;
qglDepthBoundsEXT(min, max);
}
/*
=====================
RB_T_Shadow
the shadow volumes face INSIDE
=====================
*/
static void RB_T_Shadow( const drawSurf_t *surf ) {
const srfTriangles_t *tri;
// set the light position if we are using a vertex program to project the rear surfaces
if ( tr.backEndRendererHasVertexPrograms && r_useShadowVertexProgram.GetBool()
&& surf->space != backEnd.currentSpace ) {
idVec4 localLight;
R_GlobalPointToLocal( surf->space->modelMatrix, backEnd.vLight->globalLightOrigin, localLight.ToVec3() );
localLight.w = 0.0f;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_ORIGIN, localLight.ToFloatPtr() );
}
tri = surf->geo;
if ( !tri->shadowCache ) {
return;
}
qglVertexPointer( 4, GL_FLOAT, sizeof( shadowCache_t ), vertexCache.Position(tri->shadowCache) );
// we always draw the sil planes, but we may not need to draw the front or rear caps
int numIndexes;
bool external = false;
if ( !r_useExternalShadows.GetInteger() ) {
numIndexes = tri->numIndexes;
} else if ( r_useExternalShadows.GetInteger() == 2 ) { // force to no caps for testing
numIndexes = tri->numShadowIndexesNoCaps;
} else if ( !(surf->dsFlags & DSF_VIEW_INSIDE_SHADOW) ) {
// if we aren't inside the shadow projection, no caps are ever needed needed
numIndexes = tri->numShadowIndexesNoCaps;
external = true;
} else if ( !backEnd.vLight->viewInsideLight && !(surf->geo->shadowCapPlaneBits & SHADOW_CAP_INFINITE) ) {
// if we are inside the shadow projection, but outside the light, and drawing
// a non-infinite shadow, we can skip some caps
if ( backEnd.vLight->viewSeesShadowPlaneBits & surf->geo->shadowCapPlaneBits ) {
// we can see through a rear cap, so we need to draw it, but we can skip the
// caps on the actual surface
numIndexes = tri->numShadowIndexesNoFrontCaps;
} else {
// we don't need to draw any caps
numIndexes = tri->numShadowIndexesNoCaps;
}
external = true;
} else {
// must draw everything
numIndexes = tri->numIndexes;
}
// set depth bounds
if( glConfig.depthBoundsTestAvailable && r_useDepthBoundsTest.GetBool() ) {
qglDepthBoundsEXT( surf->scissorRect.zmin, surf->scissorRect.zmax );
}
// debug visualization
if ( r_showShadows.GetInteger() ) {
if ( r_showShadows.GetInteger() == 3 ) {
if ( external ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
} else {
// these are the surfaces that require the reverse
qglColor3f( 1/backEnd.overBright, 0.1/backEnd.overBright, 0.1/backEnd.overBright );
}
} else {
// draw different color for turboshadows
if ( surf->geo->shadowCapPlaneBits & SHADOW_CAP_INFINITE ) {
if ( numIndexes == tri->numIndexes ) {
qglColor3f( 1/backEnd.overBright, 0.1/backEnd.overBright, 0.1/backEnd.overBright );
} else {
qglColor3f( 1/backEnd.overBright, 0.4/backEnd.overBright, 0.1/backEnd.overBright );
}
} else {
if ( numIndexes == tri->numIndexes ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
} else if ( numIndexes == tri->numShadowIndexesNoFrontCaps ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.6/backEnd.overBright );
} else {
qglColor3f( 0.6/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
}
}
}
qglStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
qglDisable( GL_STENCIL_TEST );
GL_Cull( CT_TWO_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
GL_Cull( CT_FRONT_SIDED );
qglEnable( GL_STENCIL_TEST );
return;
}
// patent-free work around
if ( !external ) {
// "preload" the stencil buffer with the number of volumes
// that get clipped by the near or far clip plane
qglStencilOp( GL_KEEP, tr.stencilDecr, tr.stencilDecr );
GL_Cull( CT_FRONT_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
qglStencilOp( GL_KEEP, tr.stencilIncr, tr.stencilIncr );
GL_Cull( CT_BACK_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
}
// traditional depth-pass stencil shadows
qglStencilOp( GL_KEEP, GL_KEEP, tr.stencilIncr );
GL_Cull( CT_FRONT_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
qglStencilOp( GL_KEEP, GL_KEEP, tr.stencilDecr );
GL_Cull( CT_BACK_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
}
/*
==================
GL_SetDefaultState
==================
*/
void GL_SetDefaultState (){
int i;
QGL_LogPrintf("---------- GL_SetDefaultState ----------\n");
// Reset the state manager
glState.projectionMatrixIdentity = true;
glState.modelviewMatrixIdentity = true;
for (i = 0; i < MAX_TEXTURE_UNITS; i++)
glState.textureMatrixIdentity[i] = true;
for (i = 0; i < MAX_TEXTURE_UNITS; i++)
glState.texture[i] = NULL;
glState.program = NULL;
glState.indexBuffer = NULL;
glState.vertexBuffer = NULL;
glState.viewportX = 0;
glState.viewportY = 0;
glState.viewportWidth = glConfig.videoWidth;
glState.viewportHeight = glConfig.videoHeight;
glState.scissorX = 0;
glState.scissorY = 0;
glState.scissorWidth = glConfig.videoWidth;
glState.scissorHeight = glConfig.videoHeight;
glState.depthBoundsMin = 0.0f;
glState.depthBoundsMax = 1.0f;
glState.texUnit = 0;
for (i = 0; i < MAX_TEXTURE_UNITS; i++){
glState.texTarget[i] = 0;
glState.texEnv[i] = GL_MODULATE;
glState.texGen[i][0] = GL_OBJECT_LINEAR;
glState.texGen[i][1] = GL_OBJECT_LINEAR;
glState.texGen[i][2] = GL_OBJECT_LINEAR;
glState.texGen[i][3] = GL_OBJECT_LINEAR;
}
glState.cullFace = false;
glState.polygonOffsetFill = false;
glState.polygonOffsetLine = false;
glState.blend = false;
glState.alphaTest = false;
glState.depthTest = false;
glState.stencilTest = false;
for (i = 0; i < MAX_TEXTURE_UNITS; i++){
glState.textureGen[i][0] = false;
glState.textureGen[i][1] = false;
glState.textureGen[i][2] = false;
glState.textureGen[i][3] = false;
}
glState.cullMode = GL_FRONT;
glState.polygonMode = GL_FILL;
glState.polygonOffsetFactor = 0.0f;
glState.polygonOffsetUnits = 0.0f;
glState.blendSrc = GL_ONE;
glState.blendDst = GL_ZERO;
glState.blendMode = GL_FUNC_ADD;
glState.alphaFunc = GL_GREATER;
glState.alphaFuncRef = 0.0f;
glState.depthFunc = GL_LEQUAL;
glState.stencilFunc[0] = GL_ALWAYS;
glState.stencilFunc[1] = GL_ALWAYS;
glState.stencilFuncRef[0] = 0;
glState.stencilFuncRef[1] = 0;
glState.stencilFuncMask[0] = 255;
glState.stencilFuncMask[1] = 255;
glState.stencilOpFail[0] = GL_KEEP;
glState.stencilOpFail[1] = GL_KEEP;
glState.stencilOpZFail[0] = GL_KEEP;
glState.stencilOpZFail[1] = GL_KEEP;
glState.stencilOpZPass[0] = GL_KEEP;
glState.stencilOpZPass[1] = GL_KEEP;
glState.depthMin = 0.0f;
glState.depthMax = 1.0f;
glState.colorMask[0] = GL_TRUE;
glState.colorMask[1] = GL_TRUE;
glState.colorMask[2] = GL_TRUE;
glState.colorMask[3] = GL_TRUE;
glState.depthMask = GL_TRUE;
glState.stencilMask[0] = 255;
glState.stencilMask[1] = 255;
// Set default state
qglMatrixMode(GL_PROJECTION);
qglLoadIdentity();
qglMatrixMode(GL_MODELVIEW);
qglLoadIdentity();
for (i = MAX_TEXTURE_UNITS - 1; i >= 0; i--){
if (i >= glConfig.maxTextureImageUnits)
continue;
if (i >= glConfig.maxTextureUnits){
qglActiveTexture(GL_TEXTURE0 + i);
qglBindTexture(GL_TEXTURE_2D, 0);
qglBindTexture(GL_TEXTURE_3D, 0);
qglBindTexture(GL_TEXTURE_CUBE_MAP, 0);
qglBindTexture(GL_TEXTURE_2D_ARRAY, 0);
continue;
}
qglActiveTexture(GL_TEXTURE0 + i);
qglMatrixMode(GL_TEXTURE);
qglLoadIdentity();
qglDisable(GL_TEXTURE_2D);
qglDisable(GL_TEXTURE_3D);
qglDisable(GL_TEXTURE_CUBE_MAP);
qglDisable(GL_TEXTURE_2D_ARRAY);
qglBindTexture(GL_TEXTURE_2D, 0);
qglBindTexture(GL_TEXTURE_3D, 0);
qglBindTexture(GL_TEXTURE_CUBE_MAP, 0);
qglBindTexture(GL_TEXTURE_2D_ARRAY, 0);
qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
qglDisable(GL_TEXTURE_GEN_S);
qglDisable(GL_TEXTURE_GEN_T);
qglDisable(GL_TEXTURE_GEN_R);
qglDisable(GL_TEXTURE_GEN_Q);
qglTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
qglTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
qglTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
qglTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
}
qglDisable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
qglUseProgram(0);
qglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
qglBindBuffer(GL_ARRAY_BUFFER, 0);
qglViewport(0, 0, glConfig.videoWidth, glConfig.videoHeight);
qglEnable(GL_SCISSOR_TEST);
qglScissor(0, 0, glConfig.videoWidth, glConfig.videoHeight);
qglEnable(GL_DEPTH_BOUNDS_TEST_EXT);
qglDepthBoundsEXT(0.0f, 1.0f);
qglFrontFace(GL_CCW);
qglShadeModel(GL_SMOOTH);
qglPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
qglDisable(GL_CULL_FACE);
qglCullFace(GL_FRONT);
qglDisable(GL_POLYGON_OFFSET_FILL);
qglDisable(GL_POLYGON_OFFSET_LINE);
qglPolygonOffset(0.0f, 0.0f);
qglDisable(GL_BLEND);
qglBlendFunc(GL_ONE, GL_ZERO);
qglBlendEquation(GL_FUNC_ADD);
qglDisable(GL_ALPHA_TEST);
qglAlphaFunc(GL_GREATER, 0.0f);
qglDisable(GL_DEPTH_TEST);
qglDepthFunc(GL_LEQUAL);
qglDisable(GL_STENCIL_TEST);
qglStencilFunc(GL_ALWAYS, 128, 255);
qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
qglDepthRange(0.0f, 1.0f);
qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
qglDepthMask(GL_TRUE);
qglStencilMask(255);
qglDisable(GL_DEPTH_CLAMP);
qglDisable(GL_CLIP_PLANE0);
if (glConfig.multiSamples > 1){
qglDisable(GL_MULTISAMPLE);
qglDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
}
qglClearColor(0.0f, 0.0f, 0.0f, 1.0f);
qglClearDepth(1.0f);
qglClearStencil(128);
qglEnableClientState(GL_VERTEX_ARRAY);
qglDisableVertexAttribArray(GL_ATTRIB_NORMAL);
qglDisableVertexAttribArray(GL_ATTRIB_TANGENT1);
qglDisableVertexAttribArray(GL_ATTRIB_TANGENT2);
qglDisableVertexAttribArray(GL_ATTRIB_TEXCOORD);
qglDisableVertexAttribArray(GL_ATTRIB_COLOR);
QGL_LogPrintf("--------------------\n");
}
