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fix PK2H, UP2H, PK2US bugs

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This commit is contained in:
Brian Paul
2004-02-27 01:28:24 +00:00
parent fca9121a21
commit 579ea7ff7a
1 changed files with 21 additions and 18 deletions
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39
src/mesa/swrast/s_nvfragprog.c
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@@ -879,25 +879,28 @@ execute_program( GLcontext *ctx,
#endif
}
break;
case FP_OPCODE_PK2H: /* pack two 16-bit floats */
/* XXX this is probably wrong */
case FP_OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */
{
GLfloat a[4], result[4];
const GLuint *rawBits = (const GLuint *) a;
GLhalfNV hx, hy;
GLuint *rawResult = (GLuint *) result;
GLuint twoHalves;
fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
hx = _mesa_float_to_half(a[0]);
hy = _mesa_float_to_half(a[1]);
twoHalves = hx | (hy << 16);
rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
= rawBits[0] | (rawBits[1] << 16);
= twoHalves;
store_vector4( inst, machine, result );
}
break;
case FP_OPCODE_PK2US: /* pack two GLushorts */
case FP_OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */
{
GLfloat a[4], result[4];
GLuint usx, usy, *rawResult = (GLuint *) result;
fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
a[0] = CLAMP(a[0], 0.0F, 1.0F);
a[1] = CLAMP(a[0], 0.0F, 1.0F);
a[1] = CLAMP(a[1], 0.0F, 1.0F);
usx = IROUND(a[0] * 65535.0F);
usy = IROUND(a[1] * 65535.0F);
rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3]
@@ -905,7 +908,7 @@ execute_program( GLcontext *ctx,
store_vector4( inst, machine, result );
}
break;
case FP_OPCODE_PK4B: /* pack four GLbytes */
case FP_OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */
{
GLfloat a[4], result[4];
GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result;
@@ -923,7 +926,7 @@ execute_program( GLcontext *ctx,
store_vector4( inst, machine, result );
}
break;
case FP_OPCODE_PK4UB: /* pack four GLubytes */
case FP_OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */
{
GLfloat a[4], result[4];
GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result;
@@ -1186,16 +1189,15 @@ execute_program( GLcontext *ctx,
}
break;
case FP_OPCODE_UP2H: /* unpack two 16-bit floats */
/* XXX this is probably wrong */
{
GLfloat a[4], result[4];
const GLuint *rawBits = (const GLuint *) a;
GLuint *rawResult = (GLuint *) result;
GLhalfNV hx, hy;
fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
rawResult[0] = rawBits[0] & 0xffff;
rawResult[1] = (rawBits[0] >> 16) & 0xffff;
rawResult[2] = rawBits[0] & 0xffff;
rawResult[3] = (rawBits[0] >> 16) & 0xffff;
hx = rawBits[0] & 0xffff;
hy = rawBits[0] >> 16;
result[0] = result[2] = _mesa_half_to_float(hx);
result[1] = result[3] = _mesa_half_to_float(hy);
store_vector4( inst, machine, result );
}
break;
@@ -1203,11 +1205,12 @@ execute_program( GLcontext *ctx,
{
GLfloat a[4], result[4];
const GLuint *rawBits = (const GLuint *) a;
GLushort usx, usy;
fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
result[0] = (GLfloat) ((rawBits[0] >> 0) & 0xffff) / 65535.0F;
result[1] = (GLfloat) ((rawBits[0] >> 16) & 0xffff) / 65535.0F;
result[2] = result[0];
result[3] = result[1];
usx = rawBits[0] & 0xffff;
usy = rawBits[0] >> 16;
result[0] = result[2] = usx * (1.0f / 65535.0f);
result[1] = result[3] = usy * (1.0f / 65535.0f);
store_vector4( inst, machine, result );
}
break;