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inline float4 compute_clip(float4 vec, float4 scale, float4 trans)
{
return vec*scale + trans;
}
inline float
dot4(const float4 a, const float4 b)
{
float4 c = a*b;
return c.x + c.y + c.z + c.w;
}
inline unsigned
compute_clipmask(float4 clip, const float4 (*plane), unsigned nr)
{
unsigned mask = 0;
unsigned i;
for (i = 0; i < nr; i++) {
if (dot4(clip, plane[i]) < 0)
mask |= (1<<i);
}
return mask;
}
inline void collect_results(float4 *results, struct vertex_header *vOut,
float4 *planes, int nr_planes,
float4 scale, float4 trans)
{
/* store results */
unsigned slot;
float x, y, z, w;
/* Handle attr[0] (position) specially:
*/
float4 res0 = results[0];
x = vOut->clip[0] = clip.x;
y = vOut->clip[1] = clip.y;
z = vOut->clip[2] = clip.z;
w = vOut->clip[3] = clip.w;
vOut[i]->clipmask = compute_clipmask(res0, planes, nr_planes);
vOut[i]->edgeflag = 1;
/* divide by w */
w = 1.0f / w;
x *= w;
y *= w;
z *= w;
res0.x = x; res0.y = y; res0.z = z; res0.w = 1;
/* Viewport mapping */
res = res * scale + trans;
vOut->data[0][0] = res.x;
vOut->data[0][1] = res.y;
vOut->data[0][2] = res.z;
vOut->data[0][3] = w;
/* Remaining attributes are packed into sequential post-transform
* vertex attrib slots.
* Skip 0 since we just did it above.
* Subtract two because of the VERTEX_HEADER, CLIP_POS attribs.
*/
for (slot = 1; slot < draw->vertex_info.num_attribs - 2; slot++) {
float4 vec = results[slot];
vOut->data[slot][0] = vec.x;
vOut->data[slot][1] = vec.y;
vOut->data[slot][2] = vec.z;
vOut->data[slot][3] = vec.w;
printf("output %d: %f %f %f %f\n", slot,
vOut->data[slot][0],
vOut->data[slot][1],
vOut->data[slot][2],
vOut->data[slot][3]);
}
}
void run_vertex_shader(float ainputs[VS_QUEUE_LENGTH][PIPE_MAX_SHADER_INPUTS][4],
struct vertex_header *dests[VS_QUEUE_LENGTH],
float *aconsts[4]
int count)
{
float4 inputs[VS_QUEUE_LENGTH][PIPE_MAX_SHADER_INPUTS];
float4 *consts;
}
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