diff options
Diffstat (limited to 'indra/llimage/llimage.cpp')
| -rwxr-xr-x | indra/llimage/llimage.cpp | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp index 4028514898..8b7c352437 100755 --- a/indra/llimage/llimage.cpp +++ b/indra/llimage/llimage.cpp @@ -962,13 +962,15 @@ void LLImageRaw::filterSaturate(F32 saturation) LLMatrix3 r_b; // 45 degre rotation around z - r_a.setRows(LLVector3(0.7071, 0.7071, 0.0), - LLVector3(-0.7071, 0.7071, 0.0), - LLVector3(0.0, 0.0, 1.0)); + r_a.setRows(LLVector3( OO_SQRT2, OO_SQRT2, 0.0), + LLVector3(-OO_SQRT2, OO_SQRT2, 0.0), + LLVector3( 0.0, 0.0, 1.0)); // 54.73 degre rotation around y - r_b.setRows(LLVector3(0.5773, 0.0, -0.8165), - LLVector3(0.0, 1.0, 0.0), - LLVector3(0.8165, 0.0, 0.5773)); + float oo_sqrt3 = 1.0f / F_SQRT3; + float sin_54 = F_SQRT2 * oo_sqrt3; + r_b.setRows(LLVector3(oo_sqrt3, 0.0, -sin_54), + LLVector3(0.0, 1.0, 0.0), + LLVector3(sin_54, 0.0, oo_sqrt3)); // Coordinate conversion LLMatrix3 Lij = r_b * r_a; @@ -986,6 +988,40 @@ void LLImageRaw::filterSaturate(F32 saturation) colorTransform(transfo); } +void LLImageRaw::filterRotate(F32 alpha) +{ + // Matrix to Lij + LLMatrix3 r_a; + LLMatrix3 r_b; + + // 45 degre rotation around z + r_a.setRows(LLVector3( OO_SQRT2, OO_SQRT2, 0.0), + LLVector3(-OO_SQRT2, OO_SQRT2, 0.0), + LLVector3( 0.0, 0.0, 1.0)); + // 54.73 degre rotation around y + float oo_sqrt3 = 1.0f / F_SQRT3; + float sin_54 = F_SQRT2 * oo_sqrt3; + r_b.setRows(LLVector3(oo_sqrt3, 0.0, -sin_54), + LLVector3(0.0, 1.0, 0.0), + LLVector3(sin_54, 0.0, oo_sqrt3)); + + // Coordinate conversion + LLMatrix3 Lij = r_b * r_a; + LLMatrix3 Lij_inv = Lij; + Lij_inv.transpose(); + + // Local color rotation transform + LLMatrix3 r; + alpha *= DEG_TO_RAD; + r.setRows(LLVector3( cosf(alpha), sinf(alpha), 0.0), + LLVector3(-sinf(alpha), cosf(alpha), 0.0), + LLVector3( 0.0, 0.0, 1.0)); + + // Global color rotation transform + LLMatrix3 transfo = Lij_inv * r * Lij; + colorTransform(transfo); +} + // Filter Primitives void LLImageRaw::colorTransform(const LLMatrix3 &transform) { |