Rework matrix-related code.

GLSL matrices are stored in column-major order while GL_ARB_vertex/fragment_program
use row-major.  So, need to use STATE_MATRIX_TRANSPOSE for built-in matrices.
Unfortunately, this means that the expression M * V isn't very efficient since we
need to extract the rows out of M.  And that's the typical expression for vertex
transformation:  gl_ModelViewProjectionMatrix * gl_Position.
Solve this inefficiency by looking for M*V expressions and replacing them
with V*Transpose(M).
Also, add support for GLSL 1.20's MatrixTranspose, Inverse and InverseTranspose
matrices.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mesa/shader/slang/library/slang_common_builtin.gc b/src/mesa/shader/slang/library/slang_common_builtin.gc
index c8931d259e..476608fb06 100644
--- a/src/mesa/shader/slang/library/slang_common_builtin.gc
+++ b/src/mesa/shader/slang/library/slang_common_builtin.gc
@@ -47,6 +47,7 @@ uniform mat4 gl_ModelViewProjectionMatrix;
 uniform mat4 gl_TextureMatrix[gl_MaxTextureCoords];
 
 uniform mat3 gl_NormalMatrix;
+uniform mat3 __NormalMatrixTranspose;  // Mesa only
 
 uniform mat4 gl_ModelViewMatrixInverse;
 uniform mat4 gl_ProjectionMatrixInverse;