Make it running under Linux.

1 files changed, 1402 insertions, 1402 deletions

diff --git a/progs/slang/cltest.txt b/progs/slang/cltest.txt
index 7d87e74..8ca1dd4 100644
--- a/progs/slang/cltest.txt
+++ b/progs/slang/cltest.txt
@@ -1,1402 +1,1402 @@
-$ /*

-$ Shader test script.

-$ 

-$ Author: Michal Krol

-$ 

-$ Comment line starts with dollar sign and white space.

-$ 

-$ $program <name> starts a new test program section called <name>. Contains all other sections.

-$ 

-$ $attrib <name> starts vertex data input section for attrib called <name>. Each line consists of

-$   four values that form single vertex attrib.

-$ 

-$ $vertex starts vertex shader section. Contains $code and &output sections.

-$ 

-$ $code starts source code section. All text in this section gets compiled into appropriate

-$   shader object.

-$ 

-$ $output starts shader execution results section. These are compared, value-by-value,

-$   with results of executing printMESA() functions within a shader.

-$ */

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test printMESA() function.

-$ */

-

-$program PRINT TEST

-

-$vertex

-

-$code

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (11.1);

-   printMESA (111);

-   printMESA (true);

-

-   printMESA (vec2 (22.1, 22.2));

-   printMESA (vec3 (33.1, 33.2, 33.3));

-   printMESA (vec4 (44.1, 44.2, 44.3, 44.4));

-

-   printMESA (ivec2 (221, 222));

-   printMESA (ivec3 (331, 332, 333));

-   printMESA (ivec4 (441, 442, 443, 444));

-

-   printMESA (bvec2 (false, true));

-   printMESA (bvec3 (true, true, false));

-   printMESA (bvec4 (true, false, true, false));

-

-   printMESA (mat2 (55.11, 55.12, 55.21, 55.22));

-   printMESA (mat3 (66.11, 66.12, 66.13,

-                    66.21, 66.22, 66.23,

-                    66.31, 66.32, 66.33));

-   printMESA (mat4 (77.11, 77.12, 77.13, 77.14,

-                    77.21, 77.22, 77.23, 77.24,

-                    77.31, 77.32, 77.33, 77.34,

-                    77.41, 77.42, 77.43, 77.44));

-}

-

-$output

-

-11.1

-111

-true

-

-22.1

-22.2

-33.1

-33.2

-33.3

-44.1

-44.2

-44.3

-44.4

-

-221

-222

-331

-332

-333

-441

-442

-443

-444

-

-false

-true

-true

-true

-false

-true

-false

-true

-false

-

-55.11

-55.12

-55.21

-55.22

-

-66.11

-66.12

-66.13

-66.21

-66.22

-66.23

-66.31

-66.32

-66.33

-

-77.11

-77.12

-77.13

-77.14

-77.21

-77.22

-77.23

-77.24

-77.31

-77.32

-77.33

-77.34

-77.41

-77.42

-77.43

-77.44

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test type casting.

-$ */

-

-$program TYPE CAST TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Zero

-0.0 0.0 0.0 0.0

-

-$attrib _One

-1.1 0.0 0.0 0.0

-

-$attrib _Two

-2.2 0.0 0.0 0.0

-

-$attrib _MinusThree

--3.3 0.0 0.0 0.0

-

-$vertex

-

-$code

-

-attribute float _Zero;

-attribute float _One;

-attribute float _Two;

-attribute float _MinusThree;

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_Zero);

-   printMESA (_One);

-   printMESA (_Two);

-   printMESA (_MinusThree);

-

-   printMESA (float (_Zero));

-   printMESA (float (_One));

-   printMESA (float (_Two));

-   printMESA (float (_MinusThree));

-   printMESA (float (45.99));

-   printMESA (float (-6.17));

-

-   printMESA (bool (_Zero));

-   printMESA (bool (_One));

-   printMESA (bool (_Two));

-   printMESA (bool (_MinusThree));

-   printMESA (bool (45.99));

-   printMESA (bool (-6.17));

-   printMESA (bool (0.0001));

-   printMESA (bool (0.0));

-

-   printMESA (int (_Zero));

-   printMESA (int (_One));

-   printMESA (int (_Two));

-   printMESA (int (_MinusThree));

-   printMESA (int (45.99));

-   printMESA (int (45.22));

-   printMESA (int (-6.17));

-   printMESA (int (-6.87));

-}

-

-$output

-

-0.0

-1.1

-2.2

--3.3

-

-0.0

-1.1

-2.2

--3.3

-45.99

--6.17

-

-false

-true

-true

-true

-true

-true

-true

-false

-

-0

-1

-2

--3

-45

-45

--6

--6

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test vector swizzles.

-$ */

-

-$program SWIZZLE TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _One

-1.1 1.2 1.3 1.4

-

-$attrib _Two

-2.1 2.2 2.3 2.4

-

-$vertex

-

-$code

-

-attribute vec4 _One;

-attribute vec4 _Two;

-

-void assign5678 (out vec4 v)

-{

-   v.x = 5.5;

-   v.y = 6.6;

-   v.z = 7.7;

-   v.w = 8.8;

-}

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_One);

-   printMESA (_Two);

-

-   printMESA (_One.x);

-   printMESA (_One.y);

-   printMESA (_One.z);

-   printMESA (_One.w);

-

-   printMESA (_Two.xy);

-   printMESA (_Two.yx);

-   printMESA (_Two.xw);

-   printMESA (_Two.wx);

-   printMESA (_Two.yz);

-   printMESA (_Two.zy);

-   printMESA (_Two.xz);

-   printMESA (_Two.zx);

-   printMESA (_Two.zw);

-   printMESA (_Two.wz);

-

-   printMESA (_One.xyz);

-   printMESA (_One.yzx);

-   printMESA (_One.zxy);

-   printMESA (_One.xzy);

-   printMESA (_One.yzw);

-   printMESA (_One.zwx);

-

-   printMESA (_Two.xyzw);

-   printMESA (_Two.yzwx);

-   printMESA (_Two.wzyx);

-   printMESA (_Two.zwyx);

-

-   printMESA (_One.xx);

-   printMESA (_One.zz);

-   printMESA (_One.ww);

-

-   printMESA (_Two.xxx);

-   printMESA (_Two.yyy);

-   printMESA (_Two.www);

-

-   printMESA (_One.xxxx);

-   printMESA (_One.zzzz);

-

-   printMESA (_Two.xxyy);

-   printMESA (_Two.wwxx);

-   printMESA (_Two.zxxw);

-

-   vec4 v;

-

-   v.zxwy = vec4 (5.5, 6.6, 7.7, 8.8);

-   printMESA (v);

-

-   assign5678 (v.ywxz);

-   printMESA (v);

-}

-

-$output

-

-1.1

-1.2

-1.3

-1.4

-2.1

-2.2

-2.3

-2.4

-

-1.1

-1.2

-1.3

-1.4

-

-2.1

-2.2

-2.2

-2.1

-2.1

-2.4

-2.4

-2.1

-2.2

-2.3

-2.3

-2.2

-2.1

-2.3

-2.3

-2.1

-2.3

-2.4

-2.4

-2.3

-

-1.1

-1.2

-1.3

-1.2

-1.3

-1.1

-1.3

-1.1

-1.2

-1.1

-1.3

-1.2

-1.2

-1.3

-1.4

-1.3

-1.4

-1.1

-

-2.1

-2.2

-2.3

-2.4

-2.2

-2.3

-2.4

-2.1

-2.4

-2.3

-2.2

-2.1

-2.3

-2.4

-2.2

-2.1

-

-1.1

-1.1

-1.3

-1.3

-1.4

-1.4

-

-2.1

-2.1

-2.1

-2.2

-2.2

-2.2

-2.4

-2.4

-2.4

-

-1.1

-1.1

-1.1

-1.1

-1.3

-1.3

-1.3

-1.3

-

-2.1

-2.1

-2.2

-2.2

-2.4

-2.4

-2.1

-2.1

-2.3

-2.1

-2.1

-2.4

-

-6.6

-8.8

-5.5

-7.7

-

-7.7

-5.5

-8.8

-6.6

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test relational operators.

-$ */

-

-$program RELATIONAL OPERATOR TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Two

-2.0 0.0 0.0 0.0

-

-$attrib _Two2

-2.0 0.0 0.0 0.0

-

-$attrib _MinusThree

--3.0 0.0 0.0 0.0

-

-$vertex

-

-$code

-

-attribute float _Two;

-attribute float _Two2;

-attribute float _MinusThree;

-

-struct foo

-{

-	float f;

-	vec4 v4;

-	vec3 v3;

-	mat4 m4;

-	int i;

-	bool b;

-};

-

-void printMESA (const in foo bar)

-{

-	printMESA (bar.f);

-	printMESA (bar.v4);

-	printMESA (bar.v3);

-	printMESA (bar.m4);

-	printMESA (bar.i);

-	printMESA (bar.b);

-}

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   int iTwo = int (_Two);

-   int iTwo2 = int (_Two2);

-   int iMinusThree = int (_MinusThree);

-

-   printMESA (_Two <= _Two);

-   printMESA (_Two <= _Two2);

-   printMESA (_Two <= _MinusThree);

-   printMESA (_MinusThree <= _Two);

-   printMESA (iTwo <= iTwo);

-   printMESA (iTwo <= iTwo2);

-   printMESA (iTwo <= iMinusThree);

-   printMESA (iMinusThree <= iTwo);

-

-   printMESA (_Two >= _Two);

-   printMESA (_Two >= _Two2);

-   printMESA (_Two >= _MinusThree);

-   printMESA (_MinusThree >= _Two);

-   printMESA (iTwo >= iTwo);

-   printMESA (iTwo >= iTwo2);

-   printMESA (iTwo >= iMinusThree);

-   printMESA (iMinusThree >= iTwo);

-

-   printMESA (_Two < _Two);

-   printMESA (_Two < _Two2);

-   printMESA (_Two < _MinusThree);

-   printMESA (_MinusThree < _Two);

-   printMESA (iTwo < iTwo);

-   printMESA (iTwo < iTwo2);

-   printMESA (iTwo < iMinusThree);

-   printMESA (iMinusThree < iTwo);

-

-   printMESA (_Two > _Two);

-   printMESA (_Two > _Two2);

-   printMESA (_Two > _MinusThree);

-   printMESA (_MinusThree > _Two);

-   printMESA (iTwo > iTwo);

-   printMESA (iTwo > iTwo2);

-   printMESA (iTwo > iMinusThree);

-   printMESA (iMinusThree > iTwo);

-

-   printMESA (_Two == _Two);

-   printMESA (_Two == _Two2);

-   printMESA (_Two == _MinusThree);

-   printMESA (_MinusThree == _MinusThree);

-   printMESA (iTwo == iTwo);

-   printMESA (iTwo == iTwo2);

-   printMESA (iTwo == iMinusThree);

-   printMESA (iMinusThree == iMinusThree);

-

-   printMESA (_Two != _Two);

-   printMESA (_Two != _Two2);

-   printMESA (_Two != _MinusThree);

-   printMESA (_MinusThree != _MinusThree);

-   printMESA (iTwo != iTwo);

-   printMESA (iTwo != iTwo2);

-   printMESA (iTwo != iMinusThree);

-   printMESA (iMinusThree != iMinusThree);

-

-   foo foo1;

-   foo1.f = 13.31;

-   foo1.v4 = vec4 (44.11, 44.22, 44.33, 44.44);

-   foo1.v3 = vec3 (33.11, 33.22, 33.33);

-   foo1.m4 = mat4 (17.88);

-   foo1.i = 666;

-   foo1.b = true;

-   printMESA (foo1);

-

-   // make foo2 the same as foo1

-   foo foo2;

-   foo2.f = 13.31;

-   foo2.v4 = vec4 (44.11, 44.22, 44.33, 44.44);

-   foo2.v3 = vec3 (33.11, 33.22, 33.33);

-   foo2.m4 = mat4 (17.88);

-   foo2.i = 666;

-   foo2.b = true;

-

-   printMESA (foo1 == foo2);

-   printMESA (foo1 != foo2);

-

-   // make them a little bit different

-   foo2.m4[2].y = 333.333;

-   printMESA (foo2);

-

-   printMESA (foo1 == foo2);

-   printMESA (foo1 != foo2);

-}

-

-$output

-

-true

-true

-false

-true

-true

-true

-false

-true

-

-true

-true

-true

-false

-true

-true

-true

-false

-

-false

-false

-false

-true

-false

-false

-false

-true

-

-false

-false

-true

-false

-false

-false

-true

-false

-

-true

-true

-false

-true

-true

-true

-false

-true

-

-false

-false

-true

-false

-false

-false

-true

-false

-

-13.31

-44.11

-44.22

-44.33

-44.44

-33.11

-33.22

-33.33

-17.88

-0.0

-0.0

-0.0

-0.0

-17.88

-0.0

-0.0

-0.0

-0.0

-17.88

-0.0

-0.0

-0.0

-0.0

-17.88

-666

-true

-

-true

-false

-

-13.31

-44.11

-44.22

-44.33

-44.44

-33.11

-33.22

-33.33

-17.88

-0.0

-0.0

-0.0

-0.0

-17.88

-0.0

-0.0

-0.0

-333.333

-17.88

-0.0

-0.0

-0.0

-0.0

-17.88

-666

-true

-

-false

-true

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test logical operators.

-$ */

-

-$program LOGICAL OPERATOR TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _False

-0.0 0.0 0.0 0.0

-

-$attrib _True

-1.0 0.0 0.0 0.0

-

-$attrib _False2

-0.0 0.0 0.0 0.0

-

-$attrib _True2

-1.0 0.0 0.0 0.0

-

-$vertex

-

-$code

-

-attribute float _False;

-attribute float _True;

-attribute float _False2;

-attribute float _True2;

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_False);

-   printMESA (_True);

-   printMESA (_False2);

-   printMESA (_True2);

-

-   bool False = bool (_False);

-   bool True = bool (_True);

-   bool False2 = bool (_False2);

-   bool True2 = bool (_True2);

-

-   //

-   // It is important to test each operator with the following argument types:

-   // * Both arguments are different variables, even if they have the same values.

-   //   False and False2 are distinct attributes, but are the same in value.

-   // * Both arguments may be the same variables. This case tests possible

-   //   optimizations, e.g. X && X --> X.

-   // * Both arguments are constant. This tests constant folding.

-   //

-

-   printMESA (!False);

-   printMESA (!True);

-   printMESA (!false);

-   printMESA (!true);

-

-   printMESA (False ^^ False2);

-   printMESA (False ^^ True2);

-   printMESA (True ^^ False2);

-   printMESA (True ^^ True2);

-   printMESA (False ^^ False);

-   printMESA (False ^^ True);

-   printMESA (True ^^ False);

-   printMESA (True ^^ True);

-   printMESA (false ^^ false);

-   printMESA (false ^^ true);

-   printMESA (true ^^ false);

-   printMESA (true ^^ true);

-

-   printMESA (False && False2);

-   printMESA (False && True2);

-   printMESA (True && False2);

-   printMESA (True && True2);

-   printMESA (False && False);

-   printMESA (False && True);

-   printMESA (True && False);

-   printMESA (True && True);

-   printMESA (false && false);

-   printMESA (false && true);

-   printMESA (true && false);

-   printMESA (true && true);

-

-   printMESA (False || False2);

-   printMESA (False || True2);

-   printMESA (True || False2);

-   printMESA (True || True2);

-   printMESA (False || False);

-   printMESA (False || True);

-   printMESA (True || False);

-   printMESA (True || True);

-   printMESA (false || false);

-   printMESA (false || true);

-   printMESA (true || false);

-   printMESA (true || true);

-

-   //

-   // Test short-circuit evaluation of && and ||. The right expression evaluation depends

-   // on the value of the left expression. If the right expression has side effects, we

-   // can easily test if it happened.

-   //

-

-   bool x;

-

-   x = false;

-   printMESA (x);

-   printMESA (False && (x = true));

-   printMESA (x);

-

-   x = false;

-   printMESA (x);

-   printMESA (false && (x = true));

-   printMESA (x);

-

-   x = true;

-   printMESA (x);

-   printMESA (True || (x = false));

-   printMESA (x);

-

-   x = true;

-   printMESA (x);

-   printMESA (true || (x = false));

-   printMESA (x);

-}

-

-$output

-

-0.0

-1.0

-0.0

-1.0

-

-true

-false

-true

-false

-

-false

-true

-true

-false

-false

-true

-true

-false

-false

-true

-true

-false

-

-false

-false

-false

-true

-false

-false

-false

-true

-false

-false

-false

-true

-

-false

-true

-true

-true

-false

-true

-true

-true

-false

-true

-true

-true

-

-false

-false

-false

-

-false

-false

-false

-

-true

-true

-true

-

-true

-true

-true

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test subscript operator/array access.

-$ */

-

-$program ARRAY ACCESS TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Zero

-0.0 0.0 0.0 0.0

-

-$attrib _One

-1.1 0.0 0.0 0.0

-

-$attrib _Two

-2.9 0.0 0.0 0.0

-

-$attrib _Vec

-11.11 22.22 33.33 44.44

-

-$vertex

-

-$code

-

-attribute float _Zero;

-attribute float _One;

-attribute float _Two;

-attribute vec4 _Vec;

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_Zero);

-   printMESA (_One);

-   printMESA (_Two);

-   printMESA (_Vec);

-

-   printMESA (_Vec[0]);

-   printMESA (_Vec[1]);

-   printMESA (_Vec[2]);

-   printMESA (_Vec[3]);

-

-   printMESA (_Vec[int (_Zero)]);

-   printMESA (_Vec[int (_One)]);

-   printMESA (_Vec[int (_Two)]);

-}

-

-$output

-

-0.0

-1.1

-2.9

-11.11

-22.22

-33.33

-44.44

-

-11.11

-22.22

-33.33

-44.44

-

-11.11

-22.22

-33.33

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test pre/post-increment/decrement operators.

-$ Note: assumes relational operators being correct.

-$ */

-

-$program PRE/POST-INC/DEC OPERATOR TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Zero

-0.0 0.0 0.0 0.0

-

-$attrib _One

-1.1 0.0 0.0 0.0

-

-$attrib _Two4

-2.1 2.2 2.3 2.4

-

-$vertex

-

-$code

-

-attribute float _Zero;

-attribute float _One;

-attribute vec4 _Two4;

-

-float fZero, fOne;

-vec4 fTwo4;

-int iZero, iOne;

-ivec4 iTwo4;

-

-void reset () {

-   fZero = _Zero;

-   fOne = _One;

-   fTwo4 = _Two4;

-   iZero = int (_Zero);

-   iOne = int (_One);

-   iTwo4 = ivec4 (_Two4);

-}

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_Zero);

-   printMESA (_One);

-   printMESA (_Two4);

-

-   // pre-increment

-   reset ();

-   printMESA (++fZero);

-   printMESA (++fOne);

-   printMESA (++iZero);

-   printMESA (++iOne);

-   printMESA (fZero);

-   printMESA (fOne);

-   printMESA (iZero);

-   printMESA (iOne);

-   printMESA (++fTwo4 == _Two4 + 1.0);

-   printMESA (++iTwo4 == ivec4 (_Two4) + 1);

-

-   // pre-decrement

-   reset ();

-   printMESA (--fZero);

-   printMESA (--fOne);

-   printMESA (--iZero);

-   printMESA (--iOne);

-   printMESA (fZero);

-   printMESA (fOne);

-   printMESA (iZero);

-   printMESA (iOne);

-   printMESA (--fTwo4 == _Two4 - 1.0);

-   printMESA (--iTwo4 == ivec4 (_Two4) - 1);

-

-   // post-increment

-   reset ();

-   printMESA (fZero++);

-   printMESA (fOne++);

-   printMESA (iZero++);

-   printMESA (iOne++);

-   printMESA (fZero);

-   printMESA (fOne);

-   printMESA (iZero);

-   printMESA (iOne);

-   printMESA (fTwo4++ == _Two4);

-   printMESA (iTwo4++ == ivec4 (_Two4));

-

-   // post-decrement

-   reset ();

-   printMESA (fZero--);

-   printMESA (fOne--);

-   printMESA (iZero--);

-   printMESA (iOne--);

-   printMESA (fZero);

-   printMESA (fOne);

-   printMESA (iZero);

-   printMESA (iOne);

-   printMESA (fTwo4-- == _Two4);

-   printMESA (iTwo4-- == ivec4 (_Two4));

-}

-

-$output

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-

-1.0

-2.1

-1

-2

-1.0

-2.1

-1

-2

-true

-true

-

--1.0

-0.1

--1

-0

--1.0

-0.1

--1

-0

-true

-true

-

-0.0

-1.1

-0

-1

-1.0

-2.1

-1

-2

-true

-true

-

-0.0

-1.1

-0

-1

--1.0

-0.1

--1

-0

-true

-true

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test arithmetical operators.

-$ */

-

-$program ARITHMETICAL OPERATOR TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Zero

-0.0 0.0 0.0 0.0

-

-$attrib _One

-1.1 0.0 0.0 0.0

-

-$attrib _Two4

-2.1 2.2 2.3 2.4

-

-$vertex

-

-$code

-

-attribute float _Zero;

-attribute float _One;

-attribute vec4 _Two4;

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_Zero);

-   printMESA (_One);

-   printMESA (_Two4);

-

-   int iZero = int (_Zero);

-   int iOne = int (_One);

-   ivec4 iTwo4 = ivec4 (_Two4);

-

-   printMESA (-_Zero);

-   printMESA (-_One);

-   printMESA (-_Two4);

-   printMESA (-_Two4.z);

-

-   printMESA (_Zero + 0.0);

-   printMESA (_One + 0.0);

-   printMESA (_Two4 + 0.0);

-   printMESA (_Two4.y + 0.0);

-

-   printMESA (_Zero + _Zero);

-   printMESA (_Zero + _One);

-   printMESA (_Zero + _Two4);

-   printMESA (_One + _Zero);

-   printMESA (_One + _Two4);

-   printMESA (_Two4 + _Two4);

-

-   printMESA (_Zero - 0.0);

-   printMESA (_One - 0.0);

-   printMESA (_Two4 - 0.0);

-   printMESA (_Two4.y - 0.0);

-

-   printMESA (_Zero - _Zero);

-   printMESA (_Zero - _One);

-   printMESA (_Zero - _Two4);

-   printMESA (_One - _Zero);

-   printMESA (_One - _Two4);

-   printMESA (_Two4 - _Two4);

-

-   printMESA (_Zero * 1.0);

-   printMESA (_One * 1.0);

-   printMESA (_Two4 * 1.0);

-   printMESA (_Two4.x * 1.0);

-

-   printMESA (_Zero * _Zero);

-   printMESA (_Zero * _One);

-   printMESA (_Zero * _Two4);

-   printMESA (_One * _Zero);

-   printMESA (_One * _One);

-   printMESA (_One * _Two4);

-   printMESA (_Two4 * _Two4);

-

-   printMESA (_Zero / 1.0);

-   printMESA (_One / 1.0);

-   printMESA (_Two4 / 1.0);

-   printMESA (_Two4.x / 1.0);

-

-   printMESA (_Zero / _One);

-   printMESA (_Zero / _Two4);

-   printMESA (_One / _One);

-   printMESA (_One / _Two4);

-   printMESA (_Two4 / _Two4);

-}

-

-$output

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-

-0.0

--1.1

--2.1

--2.2

--2.3

--2.4

--2.3

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-2.2

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-1.1

-3.2

-3.3

-3.4

-3.5

-4.2

-4.4

-4.6

-4.8

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-2.2

-

-0.0

--1.1

--2.1

--2.2

--2.3

--2.4

-1.1

--1.0

--1.1

--1.2

--1.3

-0.0

-0.0

-0.0

-0.0

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-2.1

-

-0.0

-0.0

-0.0

-0.0

-0.0

-0.0

-0.0

-1.21

-2.31

-2.42

-2.53

-2.64

-4.41

-4.84

-5.29

-5.76

-

-0.0

-1.1

-2.1

-2.2

-2.3

-2.4

-2.1

-

-0.0

-0.0

-0.0

-0.0

-0.0

-1.0

-0.52381

-0.5

-0.47826

-0.45833

-1.0

-1.0

-1.0

-1.0

-

-

-$ /*

-$ --------------------------------------------------------------------------------------------------

-$ Test matrix operations.

-$ Note: assumes relational operators being correct.

-$ */

-

-$program MATRIX TEST

-

-$attrib gl_Vertex

-0.0 0.0 0.0 1.0

-

-$attrib _Zero

-0.0 0.0 0.0 0.0

-

-$attrib _One

-1.0 1.0 1.0 1.0

-

-$attrib _Two

-2.0 2.0 2.0 2.0

-

-$vertex

-

-$code

-

-attribute vec4 _Zero;

-attribute vec4 _One;

-attribute vec4 _Two;

-

-void main () {

-   gl_Position = gl_ModelViewMatrix * gl_Vertex;

-   gl_FrontColor = vec4 (1.0);

-

-   printMESA (_Zero);

-   printMESA (_One);

-   printMESA (_Two);

-

-   mat4 Identity = mat4 (_One.x);

-

-   printMESA (Identity == mat4 (1.0, 0.0, 0.0, 0.0,

-                                0.0, 1.0, 0.0, 0.0,

-                                0.0, 0.0, 1.0, 0.0,

-                                0.0, 0.0, 0.0, 1.0));

-   printMESA (Identity * _Two == _Two);

-

-   mat4 Matrix = mat4 (1.1, 1.2, 1.3, 1.4,

-                       2.1, 2.2, 2.3, 2.4,

-                       3.1, 3.2, 3.3, 3.4,

-                       4.1, 4.2, 4.3, 4.4);

-

-   printMESA (Matrix[2].y);

-   printMESA (Matrix[1]);

-}

-

-$output

-

-0.0

-0.0

-0.0

-0.0

-1.0

-1.0

-1.0

-1.0

-2.0

-2.0

-2.0

-2.0

-true

-true

-3.2

-2.1

-2.2

-2.3

-2.4

-

+$ /*
+$ Shader test script.
+$ 
+$ Author: Michal Krol
+$ 
+$ Comment line starts with dollar sign and white space.
+$ 
+$ $program <name> starts a new test program section called <name>. Contains all other sections.
+$ 
+$ $attrib <name> starts vertex data input section for attrib called <name>. Each line consists of
+$   four values that form single vertex attrib.
+$ 
+$ $vertex starts vertex shader section. Contains $code and &output sections.
+$ 
+$ $code starts source code section. All text in this section gets compiled into appropriate
+$   shader object.
+$ 
+$ $output starts shader execution results section. These are compared, value-by-value,
+$   with results of executing printMESA() functions within a shader.
+$ */
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test printMESA() function.
+$ */
+
+$program PRINT TEST
+
+$vertex
+
+$code
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (11.1);
+   printMESA (111);
+   printMESA (true);
+
+   printMESA (vec2 (22.1, 22.2));
+   printMESA (vec3 (33.1, 33.2, 33.3));
+   printMESA (vec4 (44.1, 44.2, 44.3, 44.4));
+
+   printMESA (ivec2 (221, 222));
+   printMESA (ivec3 (331, 332, 333));
+   printMESA (ivec4 (441, 442, 443, 444));
+
+   printMESA (bvec2 (false, true));
+   printMESA (bvec3 (true, true, false));
+   printMESA (bvec4 (true, false, true, false));
+
+   printMESA (mat2 (55.11, 55.12, 55.21, 55.22));
+   printMESA (mat3 (66.11, 66.12, 66.13,
+                    66.21, 66.22, 66.23,
+                    66.31, 66.32, 66.33));
+   printMESA (mat4 (77.11, 77.12, 77.13, 77.14,
+                    77.21, 77.22, 77.23, 77.24,
+                    77.31, 77.32, 77.33, 77.34,
+                    77.41, 77.42, 77.43, 77.44));
+}
+
+$output
+
+11.1
+111
+true
+
+22.1
+22.2
+33.1
+33.2
+33.3
+44.1
+44.2
+44.3
+44.4
+
+221
+222
+331
+332
+333
+441
+442
+443
+444
+
+false
+true
+true
+true
+false
+true
+false
+true
+false
+
+55.11
+55.12
+55.21
+55.22
+
+66.11
+66.12
+66.13
+66.21
+66.22
+66.23
+66.31
+66.32
+66.33
+
+77.11
+77.12
+77.13
+77.14
+77.21
+77.22
+77.23
+77.24
+77.31
+77.32
+77.33
+77.34
+77.41
+77.42
+77.43
+77.44
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test type casting.
+$ */
+
+$program TYPE CAST TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Zero
+0.0 0.0 0.0 0.0
+
+$attrib _One
+1.1 0.0 0.0 0.0
+
+$attrib _Two
+2.2 0.0 0.0 0.0
+
+$attrib _MinusThree
+-3.3 0.0 0.0 0.0
+
+$vertex
+
+$code
+
+attribute float _Zero;
+attribute float _One;
+attribute float _Two;
+attribute float _MinusThree;
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_Zero);
+   printMESA (_One);
+   printMESA (_Two);
+   printMESA (_MinusThree);
+
+   printMESA (float (_Zero));
+   printMESA (float (_One));
+   printMESA (float (_Two));
+   printMESA (float (_MinusThree));
+   printMESA (float (45.99));
+   printMESA (float (-6.17));
+
+   printMESA (bool (_Zero));
+   printMESA (bool (_One));
+   printMESA (bool (_Two));
+   printMESA (bool (_MinusThree));
+   printMESA (bool (45.99));
+   printMESA (bool (-6.17));
+   printMESA (bool (0.0001));
+   printMESA (bool (0.0));
+
+   printMESA (int (_Zero));
+   printMESA (int (_One));
+   printMESA (int (_Two));
+   printMESA (int (_MinusThree));
+   printMESA (int (45.99));
+   printMESA (int (45.22));
+   printMESA (int (-6.17));
+   printMESA (int (-6.87));
+}
+
+$output
+
+0.0
+1.1
+2.2
+-3.3
+
+0.0
+1.1
+2.2
+-3.3
+45.99
+-6.17
+
+false
+true
+true
+true
+true
+true
+true
+false
+
+0
+1
+2
+-3
+45
+45
+-6
+-6
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test vector swizzles.
+$ */
+
+$program SWIZZLE TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _One
+1.1 1.2 1.3 1.4
+
+$attrib _Two
+2.1 2.2 2.3 2.4
+
+$vertex
+
+$code
+
+attribute vec4 _One;
+attribute vec4 _Two;
+
+void assign5678 (out vec4 v)
+{
+   v.x = 5.5;
+   v.y = 6.6;
+   v.z = 7.7;
+   v.w = 8.8;
+}
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_One);
+   printMESA (_Two);
+
+   printMESA (_One.x);
+   printMESA (_One.y);
+   printMESA (_One.z);
+   printMESA (_One.w);
+
+   printMESA (_Two.xy);
+   printMESA (_Two.yx);
+   printMESA (_Two.xw);
+   printMESA (_Two.wx);
+   printMESA (_Two.yz);
+   printMESA (_Two.zy);
+   printMESA (_Two.xz);
+   printMESA (_Two.zx);
+   printMESA (_Two.zw);
+   printMESA (_Two.wz);
+
+   printMESA (_One.xyz);
+   printMESA (_One.yzx);
+   printMESA (_One.zxy);
+   printMESA (_One.xzy);
+   printMESA (_One.yzw);
+   printMESA (_One.zwx);
+
+   printMESA (_Two.xyzw);
+   printMESA (_Two.yzwx);
+   printMESA (_Two.wzyx);
+   printMESA (_Two.zwyx);
+
+   printMESA (_One.xx);
+   printMESA (_One.zz);
+   printMESA (_One.ww);
+
+   printMESA (_Two.xxx);
+   printMESA (_Two.yyy);
+   printMESA (_Two.www);
+
+   printMESA (_One.xxxx);
+   printMESA (_One.zzzz);
+
+   printMESA (_Two.xxyy);
+   printMESA (_Two.wwxx);
+   printMESA (_Two.zxxw);
+
+   vec4 v;
+
+   v.zxwy = vec4 (5.5, 6.6, 7.7, 8.8);
+   printMESA (v);
+
+   assign5678 (v.ywxz);
+   printMESA (v);
+}
+
+$output
+
+1.1
+1.2
+1.3
+1.4
+2.1
+2.2
+2.3
+2.4
+
+1.1
+1.2
+1.3
+1.4
+
+2.1
+2.2
+2.2
+2.1
+2.1
+2.4
+2.4
+2.1
+2.2
+2.3
+2.3
+2.2
+2.1
+2.3
+2.3
+2.1
+2.3
+2.4
+2.4
+2.3
+
+1.1
+1.2
+1.3
+1.2
+1.3
+1.1
+1.3
+1.1
+1.2
+1.1
+1.3
+1.2
+1.2
+1.3
+1.4
+1.3
+1.4
+1.1
+
+2.1
+2.2
+2.3
+2.4
+2.2
+2.3
+2.4
+2.1
+2.4
+2.3
+2.2
+2.1
+2.3
+2.4
+2.2
+2.1
+
+1.1
+1.1
+1.3
+1.3
+1.4
+1.4
+
+2.1
+2.1
+2.1
+2.2
+2.2
+2.2
+2.4
+2.4
+2.4
+
+1.1
+1.1
+1.1
+1.1
+1.3
+1.3
+1.3
+1.3
+
+2.1
+2.1
+2.2
+2.2
+2.4
+2.4
+2.1
+2.1
+2.3
+2.1
+2.1
+2.4
+
+6.6
+8.8
+5.5
+7.7
+
+7.7
+5.5
+8.8
+6.6
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test relational operators.
+$ */
+
+$program RELATIONAL OPERATOR TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Two
+2.0 0.0 0.0 0.0
+
+$attrib _Two2
+2.0 0.0 0.0 0.0
+
+$attrib _MinusThree
+-3.0 0.0 0.0 0.0
+
+$vertex
+
+$code
+
+attribute float _Two;
+attribute float _Two2;
+attribute float _MinusThree;
+
+struct foo
+{
+	float f;
+	vec4 v4;
+	vec3 v3;
+	mat4 m4;
+	int i;
+	bool b;
+};
+
+void printMESA (const in foo bar)
+{
+	printMESA (bar.f);
+	printMESA (bar.v4);
+	printMESA (bar.v3);
+	printMESA (bar.m4);
+	printMESA (bar.i);
+	printMESA (bar.b);
+}
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   int iTwo = int (_Two);
+   int iTwo2 = int (_Two2);
+   int iMinusThree = int (_MinusThree);
+
+   printMESA (_Two <= _Two);
+   printMESA (_Two <= _Two2);
+   printMESA (_Two <= _MinusThree);
+   printMESA (_MinusThree <= _Two);
+   printMESA (iTwo <= iTwo);
+   printMESA (iTwo <= iTwo2);
+   printMESA (iTwo <= iMinusThree);
+   printMESA (iMinusThree <= iTwo);
+
+   printMESA (_Two >= _Two);
+   printMESA (_Two >= _Two2);
+   printMESA (_Two >= _MinusThree);
+   printMESA (_MinusThree >= _Two);
+   printMESA (iTwo >= iTwo);
+   printMESA (iTwo >= iTwo2);
+   printMESA (iTwo >= iMinusThree);
+   printMESA (iMinusThree >= iTwo);
+
+   printMESA (_Two < _Two);
+   printMESA (_Two < _Two2);
+   printMESA (_Two < _MinusThree);
+   printMESA (_MinusThree < _Two);
+   printMESA (iTwo < iTwo);
+   printMESA (iTwo < iTwo2);
+   printMESA (iTwo < iMinusThree);
+   printMESA (iMinusThree < iTwo);
+
+   printMESA (_Two > _Two);
+   printMESA (_Two > _Two2);
+   printMESA (_Two > _MinusThree);
+   printMESA (_MinusThree > _Two);
+   printMESA (iTwo > iTwo);
+   printMESA (iTwo > iTwo2);
+   printMESA (iTwo > iMinusThree);
+   printMESA (iMinusThree > iTwo);
+
+   printMESA (_Two == _Two);
+   printMESA (_Two == _Two2);
+   printMESA (_Two == _MinusThree);
+   printMESA (_MinusThree == _MinusThree);
+   printMESA (iTwo == iTwo);
+   printMESA (iTwo == iTwo2);
+   printMESA (iTwo == iMinusThree);
+   printMESA (iMinusThree == iMinusThree);
+
+   printMESA (_Two != _Two);
+   printMESA (_Two != _Two2);
+   printMESA (_Two != _MinusThree);
+   printMESA (_MinusThree != _MinusThree);
+   printMESA (iTwo != iTwo);
+   printMESA (iTwo != iTwo2);
+   printMESA (iTwo != iMinusThree);
+   printMESA (iMinusThree != iMinusThree);
+
+   foo foo1;
+   foo1.f = 13.31;
+   foo1.v4 = vec4 (44.11, 44.22, 44.33, 44.44);
+   foo1.v3 = vec3 (33.11, 33.22, 33.33);
+   foo1.m4 = mat4 (17.88);
+   foo1.i = 666;
+   foo1.b = true;
+   printMESA (foo1);
+
+   // make foo2 the same as foo1
+   foo foo2;
+   foo2.f = 13.31;
+   foo2.v4 = vec4 (44.11, 44.22, 44.33, 44.44);
+   foo2.v3 = vec3 (33.11, 33.22, 33.33);
+   foo2.m4 = mat4 (17.88);
+   foo2.i = 666;
+   foo2.b = true;
+
+   printMESA (foo1 == foo2);
+   printMESA (foo1 != foo2);
+
+   // make them a little bit different
+   foo2.m4[2].y = 333.333;
+   printMESA (foo2);
+
+   printMESA (foo1 == foo2);
+   printMESA (foo1 != foo2);
+}
+
+$output
+
+true
+true
+false
+true
+true
+true
+false
+true
+
+true
+true
+true
+false
+true
+true
+true
+false
+
+false
+false
+false
+true
+false
+false
+false
+true
+
+false
+false
+true
+false
+false
+false
+true
+false
+
+true
+true
+false
+true
+true
+true
+false
+true
+
+false
+false
+true
+false
+false
+false
+true
+false
+
+13.31
+44.11
+44.22
+44.33
+44.44
+33.11
+33.22
+33.33
+17.88
+0.0
+0.0
+0.0
+0.0
+17.88
+0.0
+0.0
+0.0
+0.0
+17.88
+0.0
+0.0
+0.0
+0.0
+17.88
+666
+true
+
+true
+false
+
+13.31
+44.11
+44.22
+44.33
+44.44
+33.11
+33.22
+33.33
+17.88
+0.0
+0.0
+0.0
+0.0
+17.88
+0.0
+0.0
+0.0
+333.333
+17.88
+0.0
+0.0
+0.0
+0.0
+17.88
+666
+true
+
+false
+true
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test logical operators.
+$ */
+
+$program LOGICAL OPERATOR TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _False
+0.0 0.0 0.0 0.0
+
+$attrib _True
+1.0 0.0 0.0 0.0
+
+$attrib _False2
+0.0 0.0 0.0 0.0
+
+$attrib _True2
+1.0 0.0 0.0 0.0
+
+$vertex
+
+$code
+
+attribute float _False;
+attribute float _True;
+attribute float _False2;
+attribute float _True2;
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_False);
+   printMESA (_True);
+   printMESA (_False2);
+   printMESA (_True2);
+
+   bool False = bool (_False);
+   bool True = bool (_True);
+   bool False2 = bool (_False2);
+   bool True2 = bool (_True2);
+
+   //
+   // It is important to test each operator with the following argument types:
+   // * Both arguments are different variables, even if they have the same values.
+   //   False and False2 are distinct attributes, but are the same in value.
+   // * Both arguments may be the same variables. This case tests possible
+   //   optimizations, e.g. X && X --> X.
+   // * Both arguments are constant. This tests constant folding.
+   //
+
+   printMESA (!False);
+   printMESA (!True);
+   printMESA (!false);
+   printMESA (!true);
+
+   printMESA (False ^^ False2);
+   printMESA (False ^^ True2);
+   printMESA (True ^^ False2);
+   printMESA (True ^^ True2);
+   printMESA (False ^^ False);
+   printMESA (False ^^ True);
+   printMESA (True ^^ False);
+   printMESA (True ^^ True);
+   printMESA (false ^^ false);
+   printMESA (false ^^ true);
+   printMESA (true ^^ false);
+   printMESA (true ^^ true);
+
+   printMESA (False && False2);
+   printMESA (False && True2);
+   printMESA (True && False2);
+   printMESA (True && True2);
+   printMESA (False && False);
+   printMESA (False && True);
+   printMESA (True && False);
+   printMESA (True && True);
+   printMESA (false && false);
+   printMESA (false && true);
+   printMESA (true && false);
+   printMESA (true && true);
+
+   printMESA (False || False2);
+   printMESA (False || True2);
+   printMESA (True || False2);
+   printMESA (True || True2);
+   printMESA (False || False);
+   printMESA (False || True);
+   printMESA (True || False);
+   printMESA (True || True);
+   printMESA (false || false);
+   printMESA (false || true);
+   printMESA (true || false);
+   printMESA (true || true);
+
+   //
+   // Test short-circuit evaluation of && and ||. The right expression evaluation depends
+   // on the value of the left expression. If the right expression has side effects, we
+   // can easily test if it happened.
+   //
+
+   bool x;
+
+   x = false;
+   printMESA (x);
+   printMESA (False && (x = true));
+   printMESA (x);
+
+   x = false;
+   printMESA (x);
+   printMESA (false && (x = true));
+   printMESA (x);
+
+   x = true;
+   printMESA (x);
+   printMESA (True || (x = false));
+   printMESA (x);
+
+   x = true;
+   printMESA (x);
+   printMESA (true || (x = false));
+   printMESA (x);
+}
+
+$output
+
+0.0
+1.0
+0.0
+1.0
+
+true
+false
+true
+false
+
+false
+true
+true
+false
+false
+true
+true
+false
+false
+true
+true
+false
+
+false
+false
+false
+true
+false
+false
+false
+true
+false
+false
+false
+true
+
+false
+true
+true
+true
+false
+true
+true
+true
+false
+true
+true
+true
+
+false
+false
+false
+
+false
+false
+false
+
+true
+true
+true
+
+true
+true
+true
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test subscript operator/array access.
+$ */
+
+$program ARRAY ACCESS TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Zero
+0.0 0.0 0.0 0.0
+
+$attrib _One
+1.1 0.0 0.0 0.0
+
+$attrib _Two
+2.9 0.0 0.0 0.0
+
+$attrib _Vec
+11.11 22.22 33.33 44.44
+
+$vertex
+
+$code
+
+attribute float _Zero;
+attribute float _One;
+attribute float _Two;
+attribute vec4 _Vec;
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_Zero);
+   printMESA (_One);
+   printMESA (_Two);
+   printMESA (_Vec);
+
+   printMESA (_Vec[0]);
+   printMESA (_Vec[1]);
+   printMESA (_Vec[2]);
+   printMESA (_Vec[3]);
+
+   printMESA (_Vec[int (_Zero)]);
+   printMESA (_Vec[int (_One)]);
+   printMESA (_Vec[int (_Two)]);
+}
+
+$output
+
+0.0
+1.1
+2.9
+11.11
+22.22
+33.33
+44.44
+
+11.11
+22.22
+33.33
+44.44
+
+11.11
+22.22
+33.33
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test pre/post-increment/decrement operators.
+$ Note: assumes relational operators being correct.
+$ */
+
+$program PRE/POST-INC/DEC OPERATOR TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Zero
+0.0 0.0 0.0 0.0
+
+$attrib _One
+1.1 0.0 0.0 0.0
+
+$attrib _Two4
+2.1 2.2 2.3 2.4
+
+$vertex
+
+$code
+
+attribute float _Zero;
+attribute float _One;
+attribute vec4 _Two4;
+
+float fZero, fOne;
+vec4 fTwo4;
+int iZero, iOne;
+ivec4 iTwo4;
+
+void reset () {
+   fZero = _Zero;
+   fOne = _One;
+   fTwo4 = _Two4;
+   iZero = int (_Zero);
+   iOne = int (_One);
+   iTwo4 = ivec4 (_Two4);
+}
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_Zero);
+   printMESA (_One);
+   printMESA (_Two4);
+
+   // pre-increment
+   reset ();
+   printMESA (++fZero);
+   printMESA (++fOne);
+   printMESA (++iZero);
+   printMESA (++iOne);
+   printMESA (fZero);
+   printMESA (fOne);
+   printMESA (iZero);
+   printMESA (iOne);
+   printMESA (++fTwo4 == _Two4 + 1.0);
+   printMESA (++iTwo4 == ivec4 (_Two4) + 1);
+
+   // pre-decrement
+   reset ();
+   printMESA (--fZero);
+   printMESA (--fOne);
+   printMESA (--iZero);
+   printMESA (--iOne);
+   printMESA (fZero);
+   printMESA (fOne);
+   printMESA (iZero);
+   printMESA (iOne);
+   printMESA (--fTwo4 == _Two4 - 1.0);
+   printMESA (--iTwo4 == ivec4 (_Two4) - 1);
+
+   // post-increment
+   reset ();
+   printMESA (fZero++);
+   printMESA (fOne++);
+   printMESA (iZero++);
+   printMESA (iOne++);
+   printMESA (fZero);
+   printMESA (fOne);
+   printMESA (iZero);
+   printMESA (iOne);
+   printMESA (fTwo4++ == _Two4);
+   printMESA (iTwo4++ == ivec4 (_Two4));
+
+   // post-decrement
+   reset ();
+   printMESA (fZero--);
+   printMESA (fOne--);
+   printMESA (iZero--);
+   printMESA (iOne--);
+   printMESA (fZero);
+   printMESA (fOne);
+   printMESA (iZero);
+   printMESA (iOne);
+   printMESA (fTwo4-- == _Two4);
+   printMESA (iTwo4-- == ivec4 (_Two4));
+}
+
+$output
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+
+1.0
+2.1
+1
+2
+1.0
+2.1
+1
+2
+true
+true
+
+-1.0
+0.1
+-1
+0
+-1.0
+0.1
+-1
+0
+true
+true
+
+0.0
+1.1
+0
+1
+1.0
+2.1
+1
+2
+true
+true
+
+0.0
+1.1
+0
+1
+-1.0
+0.1
+-1
+0
+true
+true
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test arithmetical operators.
+$ */
+
+$program ARITHMETICAL OPERATOR TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Zero
+0.0 0.0 0.0 0.0
+
+$attrib _One
+1.1 0.0 0.0 0.0
+
+$attrib _Two4
+2.1 2.2 2.3 2.4
+
+$vertex
+
+$code
+
+attribute float _Zero;
+attribute float _One;
+attribute vec4 _Two4;
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_Zero);
+   printMESA (_One);
+   printMESA (_Two4);
+
+   int iZero = int (_Zero);
+   int iOne = int (_One);
+   ivec4 iTwo4 = ivec4 (_Two4);
+
+   printMESA (-_Zero);
+   printMESA (-_One);
+   printMESA (-_Two4);
+   printMESA (-_Two4.z);
+
+   printMESA (_Zero + 0.0);
+   printMESA (_One + 0.0);
+   printMESA (_Two4 + 0.0);
+   printMESA (_Two4.y + 0.0);
+
+   printMESA (_Zero + _Zero);
+   printMESA (_Zero + _One);
+   printMESA (_Zero + _Two4);
+   printMESA (_One + _Zero);
+   printMESA (_One + _Two4);
+   printMESA (_Two4 + _Two4);
+
+   printMESA (_Zero - 0.0);
+   printMESA (_One - 0.0);
+   printMESA (_Two4 - 0.0);
+   printMESA (_Two4.y - 0.0);
+
+   printMESA (_Zero - _Zero);
+   printMESA (_Zero - _One);
+   printMESA (_Zero - _Two4);
+   printMESA (_One - _Zero);
+   printMESA (_One - _Two4);
+   printMESA (_Two4 - _Two4);
+
+   printMESA (_Zero * 1.0);
+   printMESA (_One * 1.0);
+   printMESA (_Two4 * 1.0);
+   printMESA (_Two4.x * 1.0);
+
+   printMESA (_Zero * _Zero);
+   printMESA (_Zero * _One);
+   printMESA (_Zero * _Two4);
+   printMESA (_One * _Zero);
+   printMESA (_One * _One);
+   printMESA (_One * _Two4);
+   printMESA (_Two4 * _Two4);
+
+   printMESA (_Zero / 1.0);
+   printMESA (_One / 1.0);
+   printMESA (_Two4 / 1.0);
+   printMESA (_Two4.x / 1.0);
+
+   printMESA (_Zero / _One);
+   printMESA (_Zero / _Two4);
+   printMESA (_One / _One);
+   printMESA (_One / _Two4);
+   printMESA (_Two4 / _Two4);
+}
+
+$output
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+
+0.0
+-1.1
+-2.1
+-2.2
+-2.3
+-2.4
+-2.3
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+2.2
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+1.1
+3.2
+3.3
+3.4
+3.5
+4.2
+4.4
+4.6
+4.8
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+2.2
+
+0.0
+-1.1
+-2.1
+-2.2
+-2.3
+-2.4
+1.1
+-1.0
+-1.1
+-1.2
+-1.3
+0.0
+0.0
+0.0
+0.0
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+2.1
+
+0.0
+0.0
+0.0
+0.0
+0.0
+0.0
+0.0
+1.21
+2.31
+2.42
+2.53
+2.64
+4.41
+4.84
+5.29
+5.76
+
+0.0
+1.1
+2.1
+2.2
+2.3
+2.4
+2.1
+
+0.0
+0.0
+0.0
+0.0
+0.0
+1.0
+0.52381
+0.5
+0.47826
+0.45833
+1.0
+1.0
+1.0
+1.0
+
+
+$ /*
+$ --------------------------------------------------------------------------------------------------
+$ Test matrix operations.
+$ Note: assumes relational operators being correct.
+$ */
+
+$program MATRIX TEST
+
+$attrib gl_Vertex
+0.0 0.0 0.0 1.0
+
+$attrib _Zero
+0.0 0.0 0.0 0.0
+
+$attrib _One
+1.0 1.0 1.0 1.0
+
+$attrib _Two
+2.0 2.0 2.0 2.0
+
+$vertex
+
+$code
+
+attribute vec4 _Zero;
+attribute vec4 _One;
+attribute vec4 _Two;
+
+void main () {
+   gl_Position = gl_ModelViewMatrix * gl_Vertex;
+   gl_FrontColor = vec4 (1.0);
+
+   printMESA (_Zero);
+   printMESA (_One);
+   printMESA (_Two);
+
+   mat4 Identity = mat4 (_One.x);
+
+   printMESA (Identity == mat4 (1.0, 0.0, 0.0, 0.0,
+                                0.0, 1.0, 0.0, 0.0,
+                                0.0, 0.0, 1.0, 0.0,
+                                0.0, 0.0, 0.0, 1.0));
+   printMESA (Identity * _Two == _Two);
+
+   mat4 Matrix = mat4 (1.1, 1.2, 1.3, 1.4,
+                       2.1, 2.2, 2.3, 2.4,
+                       3.1, 3.2, 3.3, 3.4,
+                       4.1, 4.2, 4.3, 4.4);
+
+   printMESA (Matrix[2].y);
+   printMESA (Matrix[1]);
+}
+
+$output
+
+0.0
+0.0
+0.0
+0.0
+1.0
+1.0
+1.0
+1.0
+2.0
+2.0
+2.0
+2.0
+true
+true
+3.2
+2.1
+2.2
+2.3
+2.4
+