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Better short mapping code

This commit is contained in:
Jannik Vogel 2015-07-21 12:01:37 +02:00
parent e3dfc2e713
commit d93ef1a731
1 changed files with 8 additions and 10 deletions
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18
hw/xbox/nv2a.c
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@ -5050,11 +5050,10 @@ static void pgraph_method(NV2AState *d,
VertexAttribute *attribute = &pg->vertex_attributes[slot];
pgraph_allocate_inline_buffer_vertices(pg, slot);
/* FIXME: Is mapping to [-1,+1] correct? */
parameter ^= 0x80008000;
attribute->inline_value[0] = ((parameter & 0xFFFF)
/ 65535.0f - 0.5f) * 2.0f;
attribute->inline_value[1] = ((parameter >> 16)
/ 65535.0f - 0.5f) * 2.0f;
attribute->inline_value[0] = ((int16_t)(parameter & 0xFFFF) * 2.0 + 1)
/ 65535.0;
attribute->inline_value[1] = ((int16_t)(parameter >> 16) * 2.0 + 1)
/ 65535.0;
/* FIXME: Should these really be set to 0.0 and 1.0 ? Conditions? */
attribute->inline_value[2] = 0.0;
attribute->inline_value[3] = 1.0;
@ -5088,11 +5087,10 @@ static void pgraph_method(NV2AState *d,
VertexAttribute *attribute = &pg->vertex_attributes[slot];
pgraph_allocate_inline_buffer_vertices(pg, slot);
/* FIXME: Is mapping to [-1,+1] correct? */
parameter ^= 0x80008000;
attribute->inline_value[part * 2 + 0] = ((parameter & 0xFFFF)
/ 65535.0f - 0.5f) * 2.0f;
attribute->inline_value[part * 2 + 1] = ((parameter >> 16)
/ 65535.0f - 0.5f) * 2.0f;
attribute->inline_value[part * 2 + 0] = ((int16_t)(parameter & 0xFFFF)
* 2.0 + 1) / 65535.0;
attribute->inline_value[part * 2 + 1] = ((int16_t)(parameter >> 16)
* 2.0 + 1) / 65535.0;
if ((slot == 0) && (part == 1)) {
pgraph_finish_inline_buffer_vertex(pg);
assert(false); /* FIXME: Untested */