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| author | Eric Anholt <eric@anholt.net> | 2016-11-07 12:25:47 -0800 |
|---|---|---|
| committer | Emil Velikov <emil.l.velikov@gmail.com> | 2016-11-23 13:52:19 +0000 |
| commit | 64d7d70c5b4722f53f6080b35ec516462f1e191b (patch) | |
| tree | 848d547269b858fa372273ec9f89813b49331686 /src/gallium/drivers/vc4/vc4_program.c | |
| parent | 9a4206379b0e36d440481ae89b98467ed53dc86b (diff) | |
| download | external_mesa3d-64d7d70c5b4722f53f6080b35ec516462f1e191b.zip external_mesa3d-64d7d70c5b4722f53f6080b35ec516462f1e191b.tar.gz external_mesa3d-64d7d70c5b4722f53f6080b35ec516462f1e191b.tar.bz2 | |
vc4: Clamp the shadow comparison value.
Fixes piglit glsl-fs-shadow2D-clamp-z.
Cc: <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 08d51487e3b8cfb14ca2ece9545b2e2ed344e3cc)
Diffstat (limited to 'src/gallium/drivers/vc4/vc4_program.c')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index fe07d91..05e2021 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -451,6 +451,15 @@ ntq_emit_tex(struct vc4_compile *c, nir_tex_instr *instr) struct qreg u0 = qir_uniform_f(c, 0.0f); struct qreg u1 = qir_uniform_f(c, 1.0f); if (c->key->tex[unit].compare_mode) { + /* From the GL_ARB_shadow spec: + * + * "Let Dt (D subscript t) be the depth texture + * value, in the range [0, 1]. Let R be the + * interpolated texture coordinate clamped to the + * range [0, 1]." + */ + compare = qir_SAT(c, compare); + switch (c->key->tex[unit].compare_func) { case PIPE_FUNC_NEVER: depth_output = qir_uniform_f(c, 0.0f); |