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mesa: Set correct values for range/precision of shader integer types

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This commit is contained in:
Ian Romanick 2011-01-20 12:05:38 -08:00
parent dde3270c19
commit 04dca296e0
1 changed files with 11 additions and 2 deletions
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13
src/mesa/main/context.c
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@ -534,8 +534,17 @@ init_program_limits(GLenum type, struct gl_program_constants *prog)
prog->MediumFloat.RangeMax = 127;
prog->MediumFloat.Precision = 23;
prog->LowFloat = prog->HighFloat = prog->MediumFloat;
/* assume ints are stored as floats for now */
prog->LowInt = prog->MediumInt = prog->HighInt = prog->MediumFloat;
/* Assume ints are stored as floats for now, since this is the least-common
* denominator. The OpenGL ES spec implies (page 132) that the precision
* of integer types should be 0. Practically speaking, IEEE
* single-precision floating point values can only store integers in the
* range [-0x01000000, 0x01000000] without loss of precision.
*/
prog->MediumInt.RangeMin = 24;
prog->MediumInt.RangeMax = 24;
prog->MediumInt.Precision = 0;
prog->LowInt = prog->HighInt = prog->MediumInt;
}