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Respect surface format for zeta clears

This commit is contained in:
Jannik Vogel 2015-09-04 01:23:41 +02:00
parent f90a4cb5f9
commit e754087e18
1 changed files with 48 additions and 11 deletions
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59
hw/xbox/nv2a.c
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@ -2002,6 +2002,22 @@ static GraphicsObject* lookup_graphics_object(PGRAPHState *s,
return NULL;
}
/* 16 bit to [0.0, F16_MAX = 511.9375] */
static float convert_f16_to_float(uint16_t f16) {
if (f16 == 0x0000) { return 0.0; }
uint32_t i = (f16 << 11) + 0x3C000000;
return *(float*)&i;
}
/* 24 bit to [0.0, F24_MAX] */
static float convert_f24_to_float(uint32_t f24) {
assert(!(f24 >> 24));
f24 &= 0xFFFFFF;
if (f24 == 0x000000) { return 0.0; }
uint32_t i = f24 << 7;
return *(float*)&i;
}
static void pgraph_update_memory_buffer(NV2AState *d, hwaddr addr, hwaddr size,
bool f)
{
@ -5700,18 +5716,39 @@ static void pgraph_method(NV2AState *d,
uint32_t clear_zstencil =
d->pgraph.regs[NV_PGRAPH_ZSTENCILCLEARVALUE];
GLint gl_clear_stencil;
GLdouble gl_clear_depth;
GLfloat gl_clear_depth;
/* FIXME: Put these in some lookup table */
const float f16_max = 511.9375f;
/* FIXME: 7 bits of mantissa unused. maybe use full buffer? */
const float f24_max = 3.4027977E38;
switch(pg->surface_shape.zeta_format) {
case NV097_SET_SURFACE_FORMAT_ZETA_Z16:
/* FIXME: Remove bit for stencil clear? */
gl_clear_depth = (clear_zstencil & 0xFFFF) / (double)0xFFFF;
break;
case NV097_SET_SURFACE_FORMAT_ZETA_Z24S8:
gl_clear_stencil = clear_zstencil & 0xFF;
gl_clear_depth = (clear_zstencil >> 8) / (double)0xFFFFFF;
break;
default:
assert(0);
case NV097_SET_SURFACE_FORMAT_ZETA_Z16: {
uint16_t z = clear_zstencil & 0xFFFF;
/* FIXME: Remove bit for stencil clear? */
if (pg->surface_shape.z_format) {
gl_clear_depth = convert_f16_to_float(z) / f16_max;
assert(false); /* FIXME: Untested */
} else {
gl_clear_depth = z / (float)0xFFFF;
}
break;
}
case NV097_SET_SURFACE_FORMAT_ZETA_Z24S8: {
gl_clear_stencil = clear_zstencil & 0xFF;
uint32_t z = clear_zstencil >> 8;
if (pg->surface_shape.z_format) {
gl_clear_depth = convert_f24_to_float(z) / f24_max;
assert(false); /* FIXME: Untested */
} else {
gl_clear_depth = z / (float)0xFFFFFF;
}
break;
}
default:
assert(false);
break;
}
if (parameter & NV097_CLEAR_SURFACE_Z) {
gl_mask |= GL_DEPTH_BUFFER_BIT;