#include <OpenGl_ShaderProgram.hxx>
#include <OpenGl_Workspace.hxx>
+IMPLEMENT_STANDARD_HANDLE (OpenGl_SetOfShaderPrograms, Standard_Transient)
+IMPLEMENT_STANDARD_RTTIEXT(OpenGl_SetOfShaderPrograms, Standard_Transient)
+
IMPLEMENT_STANDARD_HANDLE (OpenGl_ShaderManager, Standard_Transient)
IMPLEMENT_STANDARD_RTTIEXT(OpenGl_ShaderManager, Standard_Transient)
+namespace
+{
+
+#define EOL "\n"
+
+//! Definition of VertColor varying.
+const char THE_VARY_VertColor[] =
+ EOL"varying vec4 VertColor;";
+
+const char THE_VARY_TexCoord[] =
+ EOL"varying vec2 TexCoord;";
+
+//! Auxiliary function to transform normal
+const char THE_FUNC_transformNormal[] =
+ EOL"vec3 transformNormal (in vec3 theNormal)"
+ EOL"{"
+ EOL" vec4 aResult = occWorldViewMatrixInverseTranspose"
+ EOL" * occModelWorldMatrixInverseTranspose"
+ EOL" * vec4 (theNormal, 0.0);"
+ EOL" return normalize (aResult.xyz);"
+ EOL"}";
+
+//! Global shader variable for color definition with lighting enabled.
+const char THE_FUNC_lightDef[] =
+ EOL"vec3 Ambient;" //!< Ambient contribution of light sources
+ EOL"vec3 Diffuse;" //!< Diffuse contribution of light sources
+ EOL"vec3 Specular;"; //!< Specular contribution of light sources
+
+//! Function computes contribution of isotropic point light source
+const char THE_FUNC_pointLight[] =
+ EOL"void pointLight (in int theId,"
+ EOL" in vec3 theNormal,"
+ EOL" in vec3 theView,"
+ EOL" in vec3 thePoint,"
+ EOL" in bool theIsFront)"
+ EOL"{"
+ EOL" vec3 aLight = occLight_Position (theId).xyz;"
+ EOL" if (occLight_IsHeadlight (theId) == 0)"
+ EOL" {"
+ EOL" aLight = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aLight, 1.0));"
+ EOL" }"
+ EOL" aLight -= thePoint;"
+ EOL
+ EOL" float aDist = length (aLight);"
+ EOL" aLight = aLight * (1.0 / aDist);"
+ EOL
+ EOL" float anAtten = 1.0 / (occLight_ConstAttenuation (theId)"
+ EOL" + occLight_LinearAttenuation (theId) * aDist);"
+ EOL
+ EOL" vec3 aHalf = normalize (aLight + theView);"
+ EOL
+ EOL" vec3 aFaceSideNormal = theIsFront ? theNormal : -theNormal;"
+ EOL" float aNdotL = max (0.0, dot (aFaceSideNormal, aLight));"
+ EOL" float aNdotH = max (0.0, dot (aFaceSideNormal, aHalf ));"
+ EOL
+ EOL" float aSpecl = 0.0;"
+ EOL" if (aNdotL > 0.0)"
+ EOL" {"
+ EOL" aSpecl = pow (aNdotH, theIsFront ? occFrontMaterial_Shininess() : occBackMaterial_Shininess());"
+ EOL" }"
+ EOL
+ EOL"Diffuse += occLight_Diffuse (theId).rgb * aNdotL * anAtten;"
+ EOL"Specular += occLight_Specular (theId).rgb * aSpecl * anAtten;"
+ EOL"}";
+
+//! Function computes contribution of spotlight source
+const char THE_FUNC_spotLight[] =
+ EOL"void spotLight (in int theId,"
+ EOL" in vec3 theNormal,"
+ EOL" in vec3 theView,"
+ EOL" in vec3 thePoint,"
+ EOL" in bool theIsFront)"
+ EOL"{"
+ EOL" vec3 aLight = occLight_Position (theId).xyz;"
+ EOL" vec3 aSpotDir = occLight_SpotDirection (theId).xyz;"
+ EOL" if (occLight_IsHeadlight (theId) == 0)"
+ EOL" {"
+ EOL" aLight = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aLight, 1.0));"
+ EOL" aSpotDir = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aSpotDir, 0.0));"
+ EOL" }"
+ EOL" aLight -= thePoint;"
+ EOL
+ EOL" float aDist = length (aLight);"
+ EOL" aLight = aLight * (1.0 / aDist);"
+ EOL
+ EOL" aSpotDir = normalize (aSpotDir);"
+ // light cone
+ EOL" float aCosA = dot (aSpotDir, -aLight);"
+ EOL" if (aCosA >= 1.0 || aCosA < cos (occLight_SpotCutOff (theId)))"
+ EOL" {"
+ EOL" return;"
+ EOL" }"
+ EOL
+ EOL" float anExponent = occLight_SpotExponent (theId);"
+ EOL" float anAtten = 1.0 / (occLight_ConstAttenuation (theId)"
+ EOL" + occLight_LinearAttenuation (theId) * aDist);"
+ EOL" if (anExponent > 0.0)"
+ EOL" {"
+ EOL" anAtten *= pow (aCosA, anExponent * 128.0);"
+ EOL" }"
+ EOL
+ EOL" vec3 aHalf = normalize (aLight + theView);"
+ EOL
+ EOL" vec3 aFaceSideNormal = theIsFront ? theNormal : -theNormal;"
+ EOL" float aNdotL = max (0.0, dot (aFaceSideNormal, aLight));"
+ EOL" float aNdotH = max (0.0, dot (aFaceSideNormal, aHalf ));"
+ EOL
+ EOL" float aSpecl = 0.0;"
+ EOL" if (aNdotL > 0.0)"
+ EOL" {"
+ EOL" aSpecl = pow (aNdotH, theIsFront ? occFrontMaterial_Shininess() : occBackMaterial_Shininess());"
+ EOL" }"
+ EOL
+ EOL" Diffuse += occLight_Diffuse (theId).rgb * aNdotL * anAtten;"
+ EOL" Specular += occLight_Specular (theId).rgb * aSpecl * anAtten;"
+ EOL"}";
+
+//! Function computes contribution of directional light source
+const char THE_FUNC_directionalLight[] =
+ EOL"void directionalLight (in int theId,"
+ EOL" in vec3 theNormal,"
+ EOL" in vec3 theView,"
+ EOL" in bool theIsFront)"
+ EOL"{"
+ EOL" vec3 aLight = normalize (occLight_Position (theId).xyz);"
+ EOL" if (occLight_IsHeadlight (theId) == 0)"
+ EOL" {"
+ EOL" aLight = vec3 (occWorldViewMatrix * occModelWorldMatrix * vec4 (aLight, 0.0));"
+ EOL" }"
+ EOL
+ EOL" vec3 aHalf = normalize (aLight + theView);"
+ EOL
+ EOL" vec3 aFaceSideNormal = theIsFront ? theNormal : -theNormal;"
+ EOL" float aNdotL = max (0.0, dot (aFaceSideNormal, aLight));"
+ EOL" float aNdotH = max (0.0, dot (aFaceSideNormal, aHalf ));"
+ EOL
+ EOL" float aSpecl = 0.0;"
+ EOL" if (aNdotL > 0.0)"
+ EOL" {"
+ EOL" aSpecl = pow (aNdotH, theIsFront ? occFrontMaterial_Shininess() : occBackMaterial_Shininess());"
+ EOL" }"
+ EOL
+ EOL" Diffuse += occLight_Diffuse (theId).rgb * aNdotL;"
+ EOL" Specular += occLight_Specular (theId).rgb * aSpecl;"
+ EOL"}";
+
+//! Process clipping planes in Fragment Shader.
+//! Should be added at the beginning of the main() function.
+const char THE_FRAG_CLIP_PLANES[] =
+ EOL" for (int aPlaneIter = 0; aPlaneIter < occClipPlaneCount; ++aPlaneIter)"
+ EOL" {"
+ EOL" vec4 aClipEquation = occClipPlaneEquations[aPlaneIter];"
+ EOL" int aClipSpace = occClipPlaneSpaces[aPlaneIter];"
+ EOL" if (aClipSpace == OccEquationCoords_World)"
+ EOL" {"
+ EOL" if (dot (aClipEquation.xyz, PositionWorld.xyz) + aClipEquation.w < 0.0)"
+ EOL" {"
+ EOL" discard;"
+ EOL" }"
+ EOL" }"
+ EOL" else if (aClipSpace == OccEquationCoords_View)"
+ EOL" {"
+ EOL" if (dot (aClipEquation.xyz, Position.xyz) + aClipEquation.w < 0.0)"
+ EOL" {"
+ EOL" discard;"
+ EOL" }"
+ EOL" }"
+ EOL" }";
+
+}
+
// =======================================================================
// function : OpenGl_ShaderManager
// purpose : Creates new empty shader manager
// =======================================================================
OpenGl_ShaderManager::OpenGl_ShaderManager (OpenGl_Context* theContext)
-: myContext (theContext),
- myIsPP (Standard_False),
+: myShadingModel (Visual3d_TOM_VERTEX),
+ myContext (theContext),
myLastView (NULL)
{
//
myProgramList.Clear();
}
+// =======================================================================
+// function : clear
+// purpose :
+// =======================================================================
+void OpenGl_ShaderManager::clear()
+{
+ myProgramList.Clear();
+ myLightPrograms.Nullify();
+ myFlatPrograms = OpenGl_SetOfShaderPrograms();
+ myMapOfLightPrograms.Clear();
+ myFontProgram.Nullify();
+ switchLightPrograms();
+}
+
// =======================================================================
// function : Create
// purpose : Creates new shader program
// =======================================================================
-void OpenGl_ShaderManager::Create (const Handle(Graphic3d_ShaderProgram)& theProxy,
- TCollection_AsciiString& theShareKey,
- Handle(OpenGl_ShaderProgram)& theProgram)
+Standard_Boolean OpenGl_ShaderManager::Create (const Handle(Graphic3d_ShaderProgram)& theProxy,
+ TCollection_AsciiString& theShareKey,
+ Handle(OpenGl_ShaderProgram)& theProgram)
{
theProgram.Nullify();
if (theProxy.IsNull())
{
- return;
+ return Standard_False;
}
theShareKey = theProxy->GetId();
{
myProgramList.Append (theProgram);
}
- return;
+ return Standard_True;
}
theProgram = new OpenGl_ShaderProgram (theProxy);
theProgram->Release (myContext);
theShareKey.Clear();
theProgram.Nullify();
- return;
+ return Standard_False;
}
myProgramList.Append (theProgram);
myContext->ShareResource (theShareKey, theProgram);
+ return Standard_True;
}
// =======================================================================
return myProgramList.IsEmpty();
}
+// =======================================================================
+// function : switchLightPrograms
+// purpose :
+// =======================================================================
+void OpenGl_ShaderManager::switchLightPrograms()
+{
+ TCollection_AsciiString aKey (myShadingModel == Visual3d_TOM_FRAGMENT ? "p_" : "g_");
+ const OpenGl_ListOfLight* aLights = myLightSourceState.LightSources();
+ if (aLights != NULL)
+ {
+ for (OpenGl_ListOfLight::Iterator aLightIter (*aLights); aLightIter.More(); aLightIter.Next())
+ {
+ switch (aLightIter.Value().Type)
+ {
+ case Visual3d_TOLS_AMBIENT:
+ break; // skip ambient
+ case Visual3d_TOLS_DIRECTIONAL:
+ aKey += "d";
+ break;
+ case Visual3d_TOLS_POSITIONAL:
+ aKey += "p";
+ break;
+ case Visual3d_TOLS_SPOT:
+ aKey += "s";
+ break;
+ }
+ }
+ }
+
+ if (!myMapOfLightPrograms.Find (aKey, myLightPrograms))
+ {
+ myLightPrograms = new OpenGl_SetOfShaderPrograms();
+ myMapOfLightPrograms.Bind (aKey, myLightPrograms);
+ }
+}
+
// =======================================================================
// function : UpdateLightSourceStateTo
// purpose : Updates state of OCCT light sources
{
myLightSourceState.Set (theLights);
myLightSourceState.Update();
+ switchLightPrograms();
+}
+
+// =======================================================================
+// function : SetShadingModel
+// purpose :
+// =======================================================================
+void OpenGl_ShaderManager::SetShadingModel (const Visual3d_TypeOfModel theModel)
+{
+ myShadingModel = theModel;
+ switchLightPrograms();
}
// =======================================================================
// function : SetProjectionState
// purpose : Sets new state of OCCT projection transform
// =======================================================================
-void OpenGl_ShaderManager::UpdateProjectionStateTo (const Tmatrix3* theProjectionMatrix)
+void OpenGl_ShaderManager::UpdateProjectionStateTo (const OpenGl_Mat4& theProjectionMatrix)
{
myProjectionState.Set (theProjectionMatrix);
myProjectionState.Update();
// function : SetModelWorldState
// purpose : Sets new state of OCCT model-world transform
// =======================================================================
-void OpenGl_ShaderManager::UpdateModelWorldStateTo (const Tmatrix3* theModelWorldMatrix)
+void OpenGl_ShaderManager::UpdateModelWorldStateTo (const OpenGl_Mat4& theModelWorldMatrix)
{
myModelWorldState.Set (theModelWorldMatrix);
myModelWorldState.Update();
// function : SetWorldViewState
// purpose : Sets new state of OCCT world-view transform
// =======================================================================
-void OpenGl_ShaderManager::UpdateWorldViewStateTo (const Tmatrix3* theWorldViewMatrix)
+void OpenGl_ShaderManager::UpdateWorldViewStateTo (const OpenGl_Mat4& theWorldViewMatrix)
{
myWorldViewState.Set (theWorldViewMatrix);
myWorldViewState.Update();
}
-// =======================================================================
-// function : RevertProjectionStateTo
-// purpose : Reverts state of OCCT projection transform
-// =======================================================================
-void OpenGl_ShaderManager::RevertProjectionStateTo (const Tmatrix3* theProjectionMatrix)
-{
- myProjectionState.Set (theProjectionMatrix);
- myProjectionState.Revert();
-}
-
-// =======================================================================
-// function : RevertModelWorldStateTo
-// purpose : Reverts state of OCCT model-world transform
-// =======================================================================
-void OpenGl_ShaderManager::RevertModelWorldStateTo (const Tmatrix3* theModelWorldMatrix)
-{
- myModelWorldState.Set (theModelWorldMatrix);
- myModelWorldState.Revert();
-}
-
-// =======================================================================
-// function : RevertWorldViewStateTo
-// purpose : Reverts state of OCCT world-view transform
-// =======================================================================
-void OpenGl_ShaderManager::RevertWorldViewStateTo (const Tmatrix3* theWorldViewMatrix)
-{
- myWorldViewState.Set (theWorldViewMatrix);
- myWorldViewState.Revert();
-}
-
// =======================================================================
// function : LightSourceState
// purpose : Returns current state of OCCT light sources
{
if (myMaterialStates.IsBound (theProgram))
{
- myMaterialStates.ChangeFind (theProgram).Set (theAspect);
+ OpenGl_MaterialState& aState = myMaterialStates.ChangeFind (theProgram);
+ aState.Set (theAspect);
+ aState.Update();
}
else
{
- myMaterialStates.Bind (theProgram, OpenGl_MaterialState (theAspect));
+ myMaterialStates.Bind (theProgram, OpenGl_MaterialState (theAspect));
+ myMaterialStates.ChangeFind (theProgram).Update();
}
-
- myMaterialStates.ChangeFind (theProgram).Update();
}
// =======================================================================
PushMaterialState (theProgram);
PushWorldViewState (theProgram);
PushModelWorldState (theProgram);
- PushProjectionState (theProgram);
+ PushProjectionState (theProgram);
PushLightSourceState (theProgram);
}
+
+// =======================================================================
+// function : prepareStdProgramFont
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderManager::prepareStdProgramFont()
+{
+ Handle(Graphic3d_ShaderProgram) aProgramSrc = new Graphic3d_ShaderProgram();
+ TCollection_AsciiString aSrcVert =
+ EOL"void main()"
+ EOL"{"
+ EOL" gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;"
+ EOL"}";
+
+ TCollection_AsciiString aSrcFrag =
+ EOL"float getAlpha(void) { return texture2D(occActiveSampler, gl_PointCoord).a; }"
+ EOL"void main()"
+ EOL"{"
+ EOL" vec4 aColor = occColor;"
+ EOL" aColor.a *= getAlpha();"
+ EOL" if (aColor.a <= 0.285) discard;"
+ EOL" gl_FragColor = aColor;"
+ EOL"}";
+
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_VERTEX, aSrcVert));
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_FRAGMENT, aSrcFrag));
+ TCollection_AsciiString aKey;
+ if (!Create (aProgramSrc, aKey, myFontProgram))
+ {
+ myFontProgram = new OpenGl_ShaderProgram(); // just mark as invalid
+ return Standard_False;
+ }
+ return Standard_True;
+}
+
+// =======================================================================
+// function : prepareStdProgramFlat
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderManager::prepareStdProgramFlat (Handle(OpenGl_ShaderProgram)& theProgram,
+ const Standard_Integer theBits)
+{
+ Handle(Graphic3d_ShaderProgram) aProgramSrc = new Graphic3d_ShaderProgram();
+ TCollection_AsciiString aSrcVert, aSrcVertExtraOut, aSrcVertExtraMain, aSrcFrag, aSrcFragExtraOut, aSrcFragExtraMain;
+ TCollection_AsciiString aSrcFragGetColor = EOL"vec4 getColor(void) { return occColor; }";
+ TCollection_AsciiString aSrcFragMainGetColor = EOL" gl_FragColor = getColor();";
+ if ((theBits & OpenGl_PO_Point) != 0)
+ {
+ #if defined(GL_ES_VERSION_2_0)
+ aSrcVertExtraMain += EOL" gl_PointSize = occPointSize;";
+ #endif
+ if ((theBits & OpenGl_PO_TextureA) != 0)
+ {
+ aSrcFragGetColor =
+ EOL"float getAlpha(void) { return texture2D(occActiveSampler, gl_PointCoord).a; }"
+ EOL"vec4 getColor(void)"
+ EOL"{"
+ EOL" vec4 aColor = occColor;"
+ EOL" aColor.a *= getAlpha();"
+ EOL" return aColor;"
+ EOL"}";
+
+ aSrcFragMainGetColor =
+ EOL" vec4 aColor = getColor();"
+ EOL" if (aColor.a <= 0.1) discard;"
+ EOL" gl_FragColor = aColor;";
+ }
+ else if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void) { return texture2D(occActiveSampler, gl_PointCoord); }";
+ aSrcFragMainGetColor =
+ EOL" vec4 aColor = getColor();"
+ EOL" if (aColor.a <= 0.1) discard;"
+ EOL" gl_FragColor = aColor;";
+ }
+ }
+ else
+ {
+ if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcVertExtraOut += THE_VARY_TexCoord;
+ aSrcFragExtraOut += THE_VARY_TexCoord;
+ aSrcVertExtraMain +=
+ EOL" TexCoord = occTexCoord.st;";
+
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void) { return texture2D(occActiveSampler, TexCoord.st); }";
+ }
+ }
+ if ((theBits & OpenGl_PO_VertColor) != 0)
+ {
+ aSrcVertExtraOut += THE_VARY_VertColor;
+ aSrcVertExtraMain += EOL" VertColor = occVertColor;";
+ aSrcFragExtraOut += THE_VARY_VertColor;
+ aSrcFragGetColor = EOL"vec4 getColor(void) { return VertColor; }";
+ }
+ if ((theBits & OpenGl_PO_ClipPlanes) != 0)
+ {
+ const char THE_POS_VARY[] =
+ EOL"varying vec4 PositionWorld;"
+ EOL"varying vec4 Position;";
+
+ aSrcVertExtraOut += THE_POS_VARY;
+ aSrcFragExtraOut += THE_POS_VARY;
+ aSrcVertExtraMain +=
+ EOL" PositionWorld = occModelWorldMatrix * occVertex;"
+ EOL" Position = occWorldViewMatrix * PositionWorld;";
+ aSrcFragExtraMain += THE_FRAG_CLIP_PLANES;
+ }
+
+ aSrcVert =
+ aSrcVertExtraOut
+ + EOL"void main()"
+ EOL"{"
+ + aSrcVertExtraMain
+ + EOL" gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;"
+ EOL"}";
+
+ aSrcFrag =
+ aSrcFragExtraOut
+ + aSrcFragGetColor
+ + EOL"void main()"
+ EOL"{"
+ + aSrcFragExtraMain
+ + aSrcFragMainGetColor
+ + EOL"}";
+
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_VERTEX, aSrcVert));
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_FRAGMENT, aSrcFrag));
+
+ TCollection_AsciiString aKey;
+ if (!Create (aProgramSrc, aKey, theProgram))
+ {
+ theProgram = new OpenGl_ShaderProgram(); // just mark as invalid
+ return Standard_False;
+ }
+ return Standard_True;
+}
+
+// =======================================================================
+// function : stdComputeLighting
+// purpose :
+// =======================================================================
+TCollection_AsciiString OpenGl_ShaderManager::stdComputeLighting (const Standard_Boolean theHasVertColor)
+{
+ bool aLightsMap[Visual3d_TOLS_SPOT + 1] = { false, false, false, false };
+ TCollection_AsciiString aLightsFunc, aLightsLoop;
+ const OpenGl_ListOfLight* aLights = myLightSourceState.LightSources();
+ if (aLights != NULL)
+ {
+ Standard_Integer anIndex = 0;
+ for (OpenGl_ListOfLight::Iterator aLightIter (*aLights); aLightIter.More(); aLightIter.Next(), ++anIndex)
+ {
+ switch (aLightIter.Value().Type)
+ {
+ case Visual3d_TOLS_AMBIENT:
+ --anIndex;
+ break; // skip ambient
+ case Visual3d_TOLS_DIRECTIONAL:
+ aLightsLoop = aLightsLoop + EOL" directionalLight (" + anIndex + ", theNormal, theView, theIsFront);";
+ break;
+ case Visual3d_TOLS_POSITIONAL:
+ aLightsLoop = aLightsLoop + EOL" pointLight (" + anIndex + ", theNormal, theView, aPoint, theIsFront);";
+ break;
+ case Visual3d_TOLS_SPOT:
+ aLightsLoop = aLightsLoop + EOL" spotLight (" + anIndex + ", theNormal, theView, aPoint, theIsFront);";
+ break;
+ }
+
+ bool& aTypeBit = aLightsMap[aLightIter.Value().Type];
+ if (aTypeBit)
+ {
+ continue;
+ }
+
+ aTypeBit = true;
+ switch (aLightIter.Value().Type)
+ {
+ case Visual3d_TOLS_AMBIENT: break;
+ case Visual3d_TOLS_DIRECTIONAL: aLightsFunc += THE_FUNC_directionalLight; break;
+ case Visual3d_TOLS_POSITIONAL: aLightsFunc += THE_FUNC_pointLight; break;
+ case Visual3d_TOLS_SPOT: aLightsFunc += THE_FUNC_spotLight; break;
+ }
+ }
+ }
+
+ TCollection_AsciiString aGetMatAmbient = "theIsFront ? occFrontMaterial_Ambient() : occBackMaterial_Ambient();";
+ TCollection_AsciiString aGetMatDiffuse = "theIsFront ? occFrontMaterial_Diffuse() : occBackMaterial_Diffuse();";
+ if (theHasVertColor)
+ {
+ aGetMatAmbient = "getVertColor();";
+ aGetMatDiffuse = "getVertColor();";
+ }
+
+ return TCollection_AsciiString()
+ + THE_FUNC_lightDef
+ + aLightsFunc
+ + EOL
+ EOL"vec4 computeLighting (in vec3 theNormal,"
+ EOL" in vec3 theView,"
+ EOL" in vec4 thePoint,"
+ EOL" in bool theIsFront)"
+ EOL"{"
+ EOL" Ambient = occLightAmbient.rgb;"
+ EOL" Diffuse = vec3 (0.0);"
+ EOL" Specular = vec3 (0.0);"
+ EOL" vec3 aPoint = thePoint.xyz / thePoint.w;"
+ + aLightsLoop
+ + EOL" vec4 aMaterialAmbient = " + aGetMatAmbient
+ + EOL" vec4 aMaterialDiffuse = " + aGetMatDiffuse
+ + EOL" vec4 aMaterialSpecular = theIsFront ? occFrontMaterial_Specular() : occBackMaterial_Specular();"
+ EOL" vec4 aMaterialEmission = theIsFront ? occFrontMaterial_Emission() : occBackMaterial_Emission();"
+ EOL" return vec4 (Ambient, 1.0) * aMaterialAmbient"
+ EOL" + vec4 (Diffuse, 1.0) * aMaterialDiffuse"
+ EOL" + vec4 (Specular, 1.0) * aMaterialSpecular"
+ EOL" + aMaterialEmission;"
+ EOL"}";
+}
+
+// =======================================================================
+// function : prepareStdProgramGouraud
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderManager::prepareStdProgramGouraud (Handle(OpenGl_ShaderProgram)& theProgram,
+ const Standard_Integer theBits)
+{
+ Handle(Graphic3d_ShaderProgram) aProgramSrc = new Graphic3d_ShaderProgram();
+ TCollection_AsciiString aSrcVert, aSrcVertColor, aSrcVertExtraOut, aSrcVertExtraMain, aSrcFrag, aSrcFragExtraOut, aSrcFragExtraMain;
+ TCollection_AsciiString aSrcFragGetColor = EOL"vec4 getColor(void) { return gl_FrontFacing ? FrontColor : BackColor; }";
+ if ((theBits & OpenGl_PO_Point) != 0)
+ {
+ #if defined(GL_ES_VERSION_2_0)
+ aSrcVertExtraMain += EOL" gl_PointSize = occPointSize;";
+ #endif
+ }
+ if ((theBits & OpenGl_PO_VertColor) != 0)
+ {
+ aSrcVertColor = EOL"vec4 getVertColor(void) { return occVertColor; }";
+ }
+ if ((theBits & OpenGl_PO_Point) != 0)
+ {
+ if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void)"
+ EOL"{"
+ EOL" vec4 aColor = gl_FrontFacing ? FrontColor : BackColor;"
+ EOL" return texture2D(occActiveSampler, gl_PointCoord) * aColor;"
+ EOL"}";
+ }
+ }
+ else
+ {
+ if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcVertExtraOut += THE_VARY_TexCoord;
+ aSrcFragExtraOut += THE_VARY_TexCoord;
+ aSrcVertExtraMain +=
+ EOL" TexCoord = occTexCoord.st;";
+
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void)"
+ EOL"{"
+ EOL" vec4 aColor = gl_FrontFacing ? FrontColor : BackColor;"
+ EOL" return texture2D(occActiveSampler, TexCoord.st) * aColor;"
+ EOL"}";
+ }
+ }
+ if ((theBits & OpenGl_PO_ClipPlanes) != 0)
+ {
+ const char THE_POS_VARY[] =
+ EOL"varying vec4 PositionWorld;"
+ EOL"varying vec4 Position;";
+
+ aSrcVertExtraOut += THE_POS_VARY;
+ aSrcFragExtraOut += THE_POS_VARY;
+ aSrcVertExtraMain +=
+ EOL" PositionWorld = aPositionWorld;"
+ EOL" Position = aPosition;";
+ aSrcFragExtraMain += THE_FRAG_CLIP_PLANES;
+ }
+
+ const TCollection_AsciiString aLights = stdComputeLighting ((theBits & OpenGl_PO_VertColor) != 0);
+ aSrcVert = TCollection_AsciiString()
+ + THE_FUNC_transformNormal
+ + EOL
+ + aSrcVertColor
+ + aLights
+ + EOL
+ EOL"varying vec4 FrontColor;"
+ EOL"varying vec4 BackColor;"
+ EOL
+ + aSrcVertExtraOut
+ + EOL"void main()"
+ EOL"{"
+ EOL" vec4 aPositionWorld = occModelWorldMatrix * occVertex;"
+ EOL" vec4 aPosition = occWorldViewMatrix * aPositionWorld;"
+ EOL" vec3 aNormal = transformNormal (occNormal);"
+ EOL" vec3 aView = vec3 (0.0, 0.0, 1.0);"
+ EOL" FrontColor = computeLighting (normalize (aNormal), normalize (aView), aPosition, true);"
+ EOL" BackColor = computeLighting (normalize (aNormal), normalize (aView), aPosition, false);"
+ + aSrcVertExtraMain
+ + EOL" gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;"
+ EOL"}";
+
+ aSrcFrag = TCollection_AsciiString()
+ + EOL"varying vec4 FrontColor;"
+ EOL"varying vec4 BackColor;"
+ + aSrcFragExtraOut
+ + aSrcFragGetColor
+ + EOL"void main()"
+ EOL"{"
+ + aSrcFragExtraMain
+ + EOL" gl_FragColor = getColor();"
+ EOL"}";
+
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_VERTEX, aSrcVert));
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_FRAGMENT, aSrcFrag));
+ TCollection_AsciiString aKey;
+ if (!Create (aProgramSrc, aKey, theProgram))
+ {
+ theProgram = new OpenGl_ShaderProgram(); // just mark as invalid
+ return Standard_False;
+ }
+ return Standard_True;
+}
+
+// =======================================================================
+// function : prepareStdProgramPhong
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderManager::prepareStdProgramPhong (Handle(OpenGl_ShaderProgram)& theProgram,
+ const Standard_Integer theBits)
+{
+ #define thePhongCompLight "computeLighting (normalize (Normal), normalize (View), Position, gl_FrontFacing)"
+
+ Handle(Graphic3d_ShaderProgram) aProgramSrc = new Graphic3d_ShaderProgram();
+ TCollection_AsciiString aSrcVert, aSrcVertExtraOut, aSrcVertExtraMain, aSrcFrag, aSrcFragExtraOut, aSrcFragGetVertColor, aSrcFragExtraMain;
+ TCollection_AsciiString aSrcFragGetColor = EOL"vec4 getColor(void) { return " thePhongCompLight "; }";
+ if ((theBits & OpenGl_PO_Point) != 0)
+ {
+ #if defined(GL_ES_VERSION_2_0)
+ aSrcVertExtraMain += EOL" gl_PointSize = occPointSize;";
+ #endif
+ }
+ if ((theBits & OpenGl_PO_VertColor) != 0)
+ {
+ aSrcVertExtraOut += THE_VARY_VertColor;
+ aSrcVertExtraMain += EOL" VertColor = occVertColor;";
+ aSrcFragGetColor = EOL"varying vec4 VertColor;"
+ EOL"vec4 getVertColor(void) { return VertColor; }";
+ }
+
+ if ((theBits & OpenGl_PO_Point) != 0)
+ {
+ if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void)"
+ EOL"{"
+ EOL" vec4 aColor = " thePhongCompLight ";"
+ EOL" return texture2D(occActiveSampler, gl_PointCoord) * aColor;"
+ EOL"}";
+ }
+ }
+ else
+ {
+ if ((theBits & OpenGl_PO_TextureRGB) != 0)
+ {
+ aSrcVertExtraOut += THE_VARY_TexCoord;
+ aSrcFragExtraOut += THE_VARY_TexCoord;
+ aSrcVertExtraMain +=
+ EOL" TexCoord = occTexCoord.st;";
+
+ aSrcFragGetColor =
+ EOL"vec4 getColor(void)"
+ EOL"{"
+ EOL" vec4 aColor = " thePhongCompLight ";"
+ EOL" return texture2D(occActiveSampler, TexCoord.st) * aColor;"
+ EOL"}";
+ }
+ }
+
+ if ((theBits & OpenGl_PO_ClipPlanes) != 0)
+ {
+ aSrcFragExtraMain += THE_FRAG_CLIP_PLANES;
+ }
+
+ aSrcVert = TCollection_AsciiString()
+ + THE_FUNC_transformNormal
+ + EOL
+ EOL"varying vec4 PositionWorld;"
+ EOL"varying vec4 Position;"
+ EOL"varying vec3 Normal;"
+ EOL"varying vec3 View;"
+ EOL
+ + aSrcVertExtraOut
+ + EOL"void main()"
+ EOL"{"
+ EOL" PositionWorld = occModelWorldMatrix * occVertex;"
+ EOL" Position = occWorldViewMatrix * PositionWorld;"
+ EOL" Normal = transformNormal (occNormal);"
+ EOL" View = vec3 (0.0, 0.0, 1.0);"
+ + aSrcVertExtraMain
+ + EOL" gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;"
+ EOL"}";
+
+ const TCollection_AsciiString aLights = stdComputeLighting ((theBits & OpenGl_PO_VertColor) != 0);
+ aSrcFrag = TCollection_AsciiString()
+ + EOL"varying vec4 PositionWorld;"
+ EOL"varying vec4 Position;"
+ EOL"varying vec3 Normal;"
+ EOL"varying vec3 View;"
+ + EOL
+ + aSrcFragExtraOut
+ + aSrcFragGetVertColor
+ + aLights
+ + aSrcFragGetColor
+ + EOL
+ EOL"void main()"
+ EOL"{"
+ + aSrcFragExtraMain
+ + EOL" gl_FragColor = getColor();"
+ EOL"}";
+
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_VERTEX, aSrcVert));
+ aProgramSrc->AttachShader (Graphic3d_ShaderObject::CreateFromSource (Graphic3d_TOS_FRAGMENT, aSrcFrag));
+ TCollection_AsciiString aKey;
+ if (!Create (aProgramSrc, aKey, theProgram))
+ {
+ theProgram = new OpenGl_ShaderProgram(); // just mark as invalid
+ return Standard_False;
+ }
+ return Standard_True;
+}
+
+// =======================================================================
+// function : bindProgramWithState
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderManager::bindProgramWithState (const Handle(OpenGl_ShaderProgram)& theProgram,
+ const OpenGl_Element* theAspect)
+{
+ if (!myContext->BindProgram (theProgram))
+ {
+ return Standard_False;
+ }
+ theProgram->ApplyVariables (myContext);
+
+ const OpenGl_MaterialState* aMaterialState = MaterialState (theProgram);
+ if (aMaterialState == NULL || aMaterialState->Aspect() != theAspect)
+ {
+ UpdateMaterialStateTo (theProgram, theAspect);
+ }
+
+ PushState (theProgram);
+ return Standard_True;
+}
projects / occt.git / blobdiff