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Optimise nearz clipping

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This commit is contained in:
Luke Benstead 2023-03-17 20:40:55 +00:00
parent 300f2a611e
commit 0c5f941098
1 changed files with 13 additions and 20 deletions
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33
GL/platforms/sh4.c
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@ -104,33 +104,26 @@ static struct __attribute__((aligned(32))) {
static int tri_count = 0;
static int strip_count = 0;
GL_FORCE_INLINE void interpolateColour(const uint8_t* v1, const uint8_t* v2, const float t, uint8_t* out) {
const static int MASK1 = 0x00FF00FF;
const static int MASK2 = 0xFF00FF00;
GL_FORCE_INLINE void interpolateColour(const uint32_t* a, const uint32_t* b, const float t, uint32_t* out) {
const static uint32_t MASK1 = 0x00FF00FF;
const static uint32_t MASK2 = 0xFF00FF00;
const uint32_t* a = (uint32_t*) v1;
const uint32_t* b = (uint32_t*) v2;
const int f2 = 256.0f * t;
const int f1 = 256 - f2;
const uint32_t f2 = 256 * t;
const uint32_t f1 = 256 - f2;
*((uint32_t*) out) = (((((*a & MASK1) * f1) + ((*b & MASK1) * f2)) >> 8) & MASK1) |
*out = (((((*a & MASK1) * f1) + ((*b & MASK1) * f2)) >> 8) & MASK1) |
(((((*a & MASK2) * f1) + ((*b & MASK2) * f2)) >> 8) & MASK2);
}
GL_FORCE_INLINE void _glClipEdge(const Vertex* v1, const Vertex* v2, Vertex* vout) {
static const float E [] = {
0.00001f, -0.00001f
};
static inline void _glClipEdge(const Vertex* v1, const Vertex* v2, Vertex* vout) {
/* Clipping time! */
const float d0 = v1->w + v1->xyz[2];
const float d1 = v2->w + v2->xyz[2];
const float epsilon = E[d0 < d1];
float t = MATH_Fast_Divide(d0, (d0 - d1)) + epsilon;
t = (t > 1.0f) ? 1.0f : t;
t = (t < 0.0f) ? 0.0f : t;
const float sign = ((2.0f * (d1 < d0)) - 1.0f);
const float epsilon = -0.00001f * sign;
const float n = (d0 - d1);
const float r = (1.f / sqrtf(n * n)) * sign;
float t = fmaf(r, d0, epsilon);
vout->xyz[0] = fmaf(v2->xyz[0] - v1->xyz[0], t, v1->xyz[0]);
vout->xyz[1] = fmaf(v2->xyz[1] - v1->xyz[1], t, v1->xyz[1]);
@ -140,7 +133,7 @@ GL_FORCE_INLINE void _glClipEdge(const Vertex* v1, const Vertex* v2, Vertex* vou
vout->uv[0] = fmaf(v2->uv[0] - v1->uv[0], t, v1->uv[0]);
vout->uv[1] = fmaf(v2->uv[1] - v1->uv[1], t, v1->uv[1]);
interpolateColour(v1->bgra, v2->bgra, t, vout->bgra);
interpolateColour((uint32_t*) v1->bgra, (uint32_t*) v2->bgra, t, (uint32_t*) vout->bgra);
}
GL_FORCE_INLINE void ClearTriangle() {