tdf#100080 set unused shader attribs with values, fixes GL on AMD

AMD drivers don't work well if a shader has a defined but not
enabled shader attributes. For this reason we need to make sure
that all attributes are set to some value even if the shader
doesn't use that attribute. Intel drivers, on the other hand,
crash if you enable an attribute and don't set it (set it
to null) - so we can't use this workaround.

(cherry picked from commit fdcd13c1c2b8b9fbc3480c8fa92920d8c8d4e5a7)

Change-Id: If0abcfb664c3b71bb657b9a810d2d2a14fe5d9b4
Reviewed-on: https://gerrit.libreoffice.org/25592
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

2 files changed, 77 insertions, 27 deletions

diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx
index 40df037cdf8a..39ae80640a14 100644
--- a/vcl/opengl/gdiimpl.cxx
+++ b/vcl/opengl/gdiimpl.cxx
@@ -613,25 +613,13 @@ void OpenGLSalGraphicsImpl::DrawPoint( long nX, long nY )
         GLfloat(nX), GLfloat(nY)
     };
 
+    std::vector<GLfloat> aExtrusion(3, 0);
+    mpProgram->SetExtrusionVectors(aExtrusion.data());
     ApplyProgramMatrices(0.5f);
     mpProgram->DrawArrays(GL_POINTS, pPoint);
     CHECK_GL_ERROR();
 }
 
-void OpenGLSalGraphicsImpl::DrawLine( double nX1, double nY1, double nX2, double nY2 )
-{
-    OpenGLZone aZone;
-
-    std::vector<GLfloat> pPoint {
-        GLfloat(nX1), GLfloat(nY1),
-        GLfloat(nX2), GLfloat(nY2)
-    };
-
-    ApplyProgramMatrices(0.5f);
-    mpProgram->DrawArrays(GL_LINES, pPoint);
-    CHECK_GL_ERROR();
-}
-
 namespace
 {
 
@@ -959,6 +947,8 @@ void OpenGLSalGraphicsImpl::DrawConvexPolygon( sal_uInt32 nPoints, const SalPoin
     }
 
     ApplyProgramMatrices();
+    std::vector<GLfloat> aExtrusion(nPoints * 3, 0);
+    mpProgram->SetExtrusionVectors(aExtrusion.data());
     mpProgram->DrawArrays(GL_TRIANGLE_FAN, aVertices);
     CHECK_GL_ERROR();
 
@@ -1002,6 +992,8 @@ void OpenGLSalGraphicsImpl::DrawConvexPolygon( const tools::Polygon& rPolygon, b
     }
 
     ApplyProgramMatrices();
+    std::vector<GLfloat> aExtrusion(nPoints * 3, 0);
+    mpProgram->SetExtrusionVectors(aExtrusion.data());
     mpProgram->DrawArrays(GL_TRIANGLE_FAN, aVertices);
     CHECK_GL_ERROR();
 
@@ -1051,6 +1043,8 @@ void OpenGLSalGraphicsImpl::DrawTrapezoid( const basegfx::B2DTrapezoid& trapezoi
         return;
     }
 
+    std::vector<GLfloat> aExtrusion(nPoints * 3, 0);
+    mpProgram->SetExtrusionVectors(aExtrusion.data());
     ApplyProgramMatrices();
     mpProgram->DrawArrays(GL_TRIANGLE_FAN, aVertices);
     CHECK_GL_ERROR();
@@ -1164,24 +1158,23 @@ void OpenGLSalGraphicsImpl::DrawRegionBand( const RegionBand& rRegion )
     }
 #undef ADD_VERTICE
 
+    std::vector<GLfloat> aExtrusion(aRects.size() * 6 * 3, 0);
+    mpProgram->SetExtrusionVectors(aExtrusion.data());
     ApplyProgramMatrices();
     mpProgram->DrawArrays(GL_TRIANGLES, aVertices);
     CHECK_GL_ERROR();
 }
 
-void OpenGLSalGraphicsImpl::DrawTextureRect( OpenGLTexture& rTexture, const SalTwoRect& rPosAry, bool bInverted )
+void OpenGLSalGraphicsImpl::DrawTextureRect( OpenGLTexture& /*rTexture*/, const SalTwoRect& rPosAry, bool /*bInverted*/ )
 {
     OpenGLZone aZone;
 
     SAL_INFO("vcl.opengl", "draw texture rect");
 
-    GLfloat aTexCoord[8];
-    rTexture.GetCoord( aTexCoord, rPosAry, bInverted );
-    mpProgram->SetTextureCoord( aTexCoord );
     DrawRect( rPosAry.mnDestX, rPosAry.mnDestY, rPosAry.mnDestWidth, rPosAry.mnDestHeight );
 }
 
-void OpenGLSalGraphicsImpl::DrawTexture( OpenGLTexture& rTexture, const SalTwoRect& pPosAry, bool bInverted )
+void OpenGLSalGraphicsImpl::DrawTexture( OpenGLTexture& rTexture, const SalTwoRect& rPosAry, bool bInverted )
 {
     OpenGLZone aZone;
 
@@ -1192,7 +1185,14 @@ void OpenGLSalGraphicsImpl::DrawTexture( OpenGLTexture& rTexture, const SalTwoRe
     mpProgram->SetShaderType(TextureShaderType::Normal);
     mpProgram->SetIdentityTransform("transform");
     mpProgram->SetTexture("texture", rTexture);
-    DrawTextureRect( rTexture, pPosAry, bInverted );
+
+    GLfloat aTexCoord[8];
+    rTexture.GetCoord(aTexCoord, rPosAry, bInverted);
+    mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetMaskCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
+
+    DrawTextureRect( rTexture, rPosAry, bInverted );
     mpProgram->Clean();
 }
 
@@ -1405,6 +1405,13 @@ void OpenGLSalGraphicsImpl::DrawAlphaTexture( OpenGLTexture& rTexture, const Sal
     mpProgram->SetTexture("texture", rTexture);
     mpProgram->SetBlendMode( bPremultiplied ? GL_ONE : GL_SRC_ALPHA,
                              GL_ONE_MINUS_SRC_ALPHA );
+
+    GLfloat aTexCoord[8];
+    rTexture.GetCoord(aTexCoord, rPosAry, bInverted);
+    mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetMaskCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
+
     DrawTextureRect( rTexture, rPosAry, bInverted );
     mpProgram->Clean();
 }
@@ -1421,6 +1428,11 @@ void OpenGLSalGraphicsImpl::DrawTextureDiff( OpenGLTexture& rTexture, OpenGLText
     mpProgram->SetTexture( "mask", rMask );
     mpProgram->SetBlendMode( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 
+    GLfloat aTexCoord[8];
+    rTexture.GetCoord(aTexCoord, rPosAry, bInverted);
+    mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
+
     GLfloat aMaskCoord[8];
     rMask.GetCoord(aMaskCoord, rPosAry, bInverted);
     mpProgram->SetMaskCoord(aMaskCoord);
@@ -1444,6 +1456,7 @@ void OpenGLSalGraphicsImpl::DrawTextureWithMask( OpenGLTexture& rTexture, OpenGL
     GLfloat aTexCoord[8];
     rTexture.GetCoord(aTexCoord, rPosAry);
     mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
 
     GLfloat aMaskCoord[8];
     rMask.GetCoord(aMaskCoord, rPosAry);
@@ -1464,6 +1477,10 @@ void OpenGLSalGraphicsImpl::DrawBlendedTexture( OpenGLTexture& rTexture, OpenGLT
     mpProgram->SetTexture( "mask", rMask );
     mpProgram->SetTexture( "alpha", rAlpha );
 
+    GLfloat aTexCoord[8];
+    rTexture.GetCoord(aTexCoord, rPosAry);
+    mpProgram->SetTextureCoord(aTexCoord);
+
     GLfloat aAlphaCoord[8];
     rAlpha.GetCoord(aAlphaCoord, rPosAry);
     mpProgram->SetAlphaCoord(aAlphaCoord);
@@ -1477,7 +1494,7 @@ void OpenGLSalGraphicsImpl::DrawBlendedTexture( OpenGLTexture& rTexture, OpenGLT
     mpProgram->Clean();
 }
 
-void OpenGLSalGraphicsImpl::DrawMask( OpenGLTexture& rMask, SalColor nMaskColor, const SalTwoRect& pPosAry )
+void OpenGLSalGraphicsImpl::DrawMask( OpenGLTexture& rMask, SalColor nMaskColor, const SalTwoRect& rPosAry )
 {
     OpenGLZone aZone;
 
@@ -1487,8 +1504,15 @@ void OpenGLSalGraphicsImpl::DrawMask( OpenGLTexture& rMask, SalColor nMaskColor,
     mpProgram->SetIdentityTransform("transform");
     mpProgram->SetColor( "color", nMaskColor, 0 );
     mpProgram->SetTexture("texture", rMask);
+
+    GLfloat aTexCoord[8];
+    rMask.GetCoord(aTexCoord, rPosAry);
+    mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetMaskCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
+
     mpProgram->SetBlendMode( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
-    DrawTextureRect( rMask, pPosAry );
+    DrawTextureRect(rMask, rPosAry);
     mpProgram->Clean();
 }
 
@@ -1559,6 +1583,8 @@ void OpenGLSalGraphicsImpl::FlushDeferredDrawing()
             TextureDrawParameters& rParameters = rColorTwoRectPair.second;
             ApplyProgramMatrices();
             mpProgram->SetTextureCoord(rParameters.maTextureCoords.data());
+            mpProgram->SetMaskCoord(rParameters.maTextureCoords.data());
+            mpProgram->SetAlphaCoord(rParameters.maTextureCoords.data());
             mpProgram->DrawArrays(GL_TRIANGLES, rParameters.maVertices);
         }
     }
@@ -2060,6 +2086,13 @@ bool OpenGLSalGraphicsImpl::blendBitmap(
     mpProgram->SetShaderType(TextureShaderType::Normal);
     mpProgram->SetIdentityTransform("transform");
     mpProgram->SetTexture("texture", rTexture);
+
+    GLfloat aTexCoord[8];
+    rTexture.GetCoord(aTexCoord, rPosAry);
+    mpProgram->SetTextureCoord(aTexCoord);
+    mpProgram->SetMaskCoord(aTexCoord);
+    mpProgram->SetAlphaCoord(aTexCoord);
+
     mpProgram->SetBlendMode(GL_ZERO, GL_SRC_COLOR);
     DrawTextureRect(rTexture, rPosAry);
     mpProgram->Clean();
@@ -2344,7 +2377,9 @@ void OpenGLSalGraphicsImpl::doFlush()
 
         GLfloat aTexCoord[8];
         maOffscreenTex.GetCoord( aTexCoord, aPosAry, false );
-        pProgram->SetTextureCoord( aTexCoord );
+        pProgram->SetTextureCoord(aTexCoord);
+        pProgram->SetMaskCoord(aTexCoord);
+        pProgram->SetAlphaCoord(aTexCoord);
 
         GLfloat fWidth( maOffscreenTex.GetWidth() );
         GLfloat fHeight( maOffscreenTex.GetHeight() );
diff --git a/vcl/opengl/program.cxx b/vcl/opengl/program.cxx
index 563a2951a325..4f5683255d9f 100644
--- a/vcl/opengl/program.cxx
+++ b/vcl/opengl/program.cxx
@@ -93,12 +93,15 @@ bool OpenGLProgram::Clean()
     return true;
 }
 
-void OpenGLProgram::SetVertexAttrib( GLuint& rAttrib, const OString& rName, const GLvoid* pData, GLint nSize )
+bool OpenGLProgram::EnableVertexAttrib(GLuint& rAttrib, const OString& rName)
 {
     if( rAttrib == SAL_MAX_UINT32 )
     {
-        rAttrib = glGetAttribLocation( mnId, rName.getStr() );
+        GLint aLocation = glGetAttribLocation(mnId, rName.getStr());
         CHECK_GL_ERROR();
+        if (aLocation < 0)
+            return false;
+        rAttrib = GLuint(aLocation);
     }
     if( (mnEnabledAttribs & ( 1 << rAttrib )) == 0 )
     {
@@ -106,8 +109,20 @@ void OpenGLProgram::SetVertexAttrib( GLuint& rAttrib, const OString& rName, cons
         CHECK_GL_ERROR();
         mnEnabledAttribs |= ( 1 << rAttrib );
     }
-    glVertexAttribPointer( rAttrib, nSize, GL_FLOAT, GL_FALSE, 0, pData );
-    CHECK_GL_ERROR();
+    return true;
+}
+
+void OpenGLProgram::SetVertexAttrib( GLuint& rAttrib, const OString& rName, const GLvoid* pData, GLint nSize )
+{
+    if (EnableVertexAttrib(rAttrib, rName))
+    {
+        glVertexAttribPointer( rAttrib, nSize, GL_FLOAT, GL_FALSE, 0, pData );
+        CHECK_GL_ERROR();
+    }
+    else
+    {
+        VCL_GL_INFO("Vertex attribute '" << rName << "' doesn't exist in this program (" << mnId << ")");
+    }
 }
 
 void OpenGLProgram::SetVertices( const GLvoid* pData )