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vc4: Add support for depth texturing.

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This commit is contained in:
Eric Anholt 2014-09-07 12:53:03 -07:00
parent d952a98c53
commit e7a6c54473
1 changed files with 14 additions and 4 deletions
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18
src/gallium/drivers/vc4/vc4_program.c
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@ -499,11 +499,21 @@ tgsi_to_qir_tex(struct vc4_compile *c,
c->num_texture_samples++;
struct qreg r4 = qir_TEX_RESULT(c);
struct qreg unpacked[4];
for (int i = 0; i < 4; i++)
unpacked[i] = qir_R4_UNPACK(c, r4, i);
enum pipe_format format = c->key->tex_format[unit];
struct qreg unpacked[4];
if (util_format_is_depth_or_stencil(format)) {
struct qreg depthf = qir_ITOF(c, qir_SHR(c, r4,
qir_uniform_ui(c, 8)));
struct qreg normalized = qir_FMUL(c, depthf,
qir_uniform_f(c, 1.0f/0xffffff));
for (int i = 0; i < 4; i++)
unpacked[i] = normalized;
} else {
for (int i = 0; i < 4; i++)
unpacked[i] = qir_R4_UNPACK(c, r4, i);
}
const uint8_t *swiz = vc4_get_format_swizzle(format);
for (int i = 0; i < 4; i++) {
if (!(tgsi_inst->Dst[0].Register.WriteMask & (1 << i)))