Welcome to mirror list, hosted at ThFree Co, Russian Federation.

git.blender.org/blender.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/source/blender/render/intern/source/imagetexture.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/blender/render/intern/source/imagetexture.c')
-rw-r--r--source/blender/render/intern/source/imagetexture.c181
1 files changed, 22 insertions, 159 deletions
diff --git a/source/blender/render/intern/source/imagetexture.c b/source/blender/render/intern/source/imagetexture.c
index 7d4b70cea15..12701099e18 100644
--- a/source/blender/render/intern/source/imagetexture.c
+++ b/source/blender/render/intern/source/imagetexture.c
@@ -791,176 +791,39 @@ static void area_sample(TexResult *texr, ImBuf *ibuf, float fx, float fy, afdata
texr->ta = texr->talpha ? texr->ta*xsd : (clip ? cw*xsd : 1.f);
}
-/* table of (exp(ar) - exp(a)) / (1 - exp(a)) for r in range [0, 1] and a = -2
- * used instead of actual gaussian, otherwise at high texture magnifications circular artifacts are visible */
-#define EWA_MAXIDX 255
-static const float EWA_WTS[EWA_MAXIDX + 1] = {
- 1.f, 0.990965f, 0.982f, 0.973105f, 0.96428f, 0.955524f, 0.946836f, 0.938216f, 0.929664f,
- 0.921178f, 0.912759f, 0.904405f, 0.896117f, 0.887893f, 0.879734f, 0.871638f, 0.863605f,
- 0.855636f, 0.847728f, 0.839883f, 0.832098f, 0.824375f, 0.816712f, 0.809108f, 0.801564f,
- 0.794079f, 0.786653f, 0.779284f, 0.771974f, 0.76472f, 0.757523f, 0.750382f, 0.743297f,
- 0.736267f, 0.729292f, 0.722372f, 0.715505f, 0.708693f, 0.701933f, 0.695227f, 0.688572f,
- 0.68197f, 0.67542f, 0.66892f, 0.662471f, 0.656073f, 0.649725f, 0.643426f, 0.637176f,
- 0.630976f, 0.624824f, 0.618719f, 0.612663f, 0.606654f, 0.600691f, 0.594776f, 0.588906f,
- 0.583083f, 0.577305f, 0.571572f, 0.565883f, 0.56024f, 0.55464f, 0.549084f, 0.543572f,
- 0.538102f, 0.532676f, 0.527291f, 0.521949f, 0.516649f, 0.511389f, 0.506171f, 0.500994f,
- 0.495857f, 0.490761f, 0.485704f, 0.480687f, 0.475709f, 0.470769f, 0.465869f, 0.461006f,
- 0.456182f, 0.451395f, 0.446646f, 0.441934f, 0.437258f, 0.432619f, 0.428017f, 0.42345f,
- 0.418919f, 0.414424f, 0.409963f, 0.405538f, 0.401147f, 0.39679f, 0.392467f, 0.388178f,
- 0.383923f, 0.379701f, 0.375511f, 0.371355f, 0.367231f, 0.363139f, 0.359079f, 0.355051f,
- 0.351055f, 0.347089f, 0.343155f, 0.339251f, 0.335378f, 0.331535f, 0.327722f, 0.323939f,
- 0.320186f, 0.316461f, 0.312766f, 0.3091f, 0.305462f, 0.301853f, 0.298272f, 0.294719f,
- 0.291194f, 0.287696f, 0.284226f, 0.280782f, 0.277366f, 0.273976f, 0.270613f, 0.267276f,
- 0.263965f, 0.26068f, 0.257421f, 0.254187f, 0.250979f, 0.247795f, 0.244636f, 0.241502f,
- 0.238393f, 0.235308f, 0.232246f, 0.229209f, 0.226196f, 0.223206f, 0.220239f, 0.217296f,
- 0.214375f, 0.211478f, 0.208603f, 0.20575f, 0.20292f, 0.200112f, 0.197326f, 0.194562f,
- 0.191819f, 0.189097f, 0.186397f, 0.183718f, 0.18106f, 0.178423f, 0.175806f, 0.17321f,
- 0.170634f, 0.168078f, 0.165542f, 0.163026f, 0.16053f, 0.158053f, 0.155595f, 0.153157f,
- 0.150738f, 0.148337f, 0.145955f, 0.143592f, 0.141248f, 0.138921f, 0.136613f, 0.134323f,
- 0.132051f, 0.129797f, 0.12756f, 0.125341f, 0.123139f, 0.120954f, 0.118786f, 0.116635f,
- 0.114501f, 0.112384f, 0.110283f, 0.108199f, 0.106131f, 0.104079f, 0.102043f, 0.100023f,
- 0.0980186f, 0.09603f, 0.094057f, 0.0920994f, 0.0901571f, 0.08823f, 0.0863179f, 0.0844208f,
- 0.0825384f, 0.0806708f, 0.0788178f, 0.0769792f, 0.0751551f, 0.0733451f, 0.0715493f, 0.0697676f,
- 0.0679997f, 0.0662457f, 0.0645054f, 0.0627786f, 0.0610654f, 0.0593655f, 0.0576789f, 0.0560055f,
- 0.0543452f, 0.0526979f, 0.0510634f, 0.0494416f, 0.0478326f, 0.0462361f, 0.0446521f, 0.0430805f,
- 0.0415211f, 0.039974f, 0.0384389f, 0.0369158f, 0.0354046f, 0.0339052f, 0.0324175f, 0.0309415f,
- 0.029477f, 0.0280239f, 0.0265822f, 0.0251517f, 0.0237324f, 0.0223242f, 0.020927f, 0.0195408f,
- 0.0181653f, 0.0168006f, 0.0154466f, 0.0141031f, 0.0127701f, 0.0114476f, 0.0101354f, 0.00883339f,
- 0.00754159f, 0.00625989f, 0.00498819f, 0.00372644f, 0.00247454f, 0.00123242f, 0.f
-};
-
/* test if a float value is 'nan'
* there is a C99 function for this: isnan(), but blender seems to use C90 (according to gcc warns),
* and may not be supported by other compilers either */
+/* TODO(sergey): Consider using isnan(), it's used in the other areas. */
#ifndef ISNAN
-#define ISNAN(x) ((x) != (x))
+# define ISNAN(x) ((x) != (x))
#endif
-//static int ISNAN(float x) { return (x != x); }
-static void radangle2imp(float a2, float b2, float th, float *A, float *B, float *C, float *F)
-{
- float ct2 = cosf(th);
- const float st2 = 1.0f - ct2 * ct2; /* <- sin(th)^2 */
- ct2 *= ct2;
- *A = a2*st2 + b2*ct2;
- *B = (b2 - a2)*sinf(2.f*th);
- *C = a2*ct2 + b2*st2;
- *F = a2*b2;
-}
+typedef struct ReadEWAData {
+ ImBuf *ibuf;
+ afdata_t *AFD;
+} ReadEWAData;
-/* all tests here are done to make sure possible overflows are hopefully minimized */
-static void imp2radangle(float A, float B, float C, float F, float *a, float *b, float *th, float *ecc)
+static void ewa_read_pixel_cb(void *userdata, int x, int y, float result[4])
{
- if (F <= 1e-5f) { /* use arbitrary major radius, zero minor, infinite eccentricity */
- *a = sqrtf(A > C ? A : C);
- *b = 0.f;
- *ecc = 1e10f;
- *th = 0.5f*(atan2f(B, A - C) + (float)M_PI);
- }
- else {
- const float AmC = A - C, ApC = A + C, F2 = F*2.f;
- const float r = sqrtf(AmC*AmC + B*B);
- float d = ApC - r;
- *a = (d <= 0.f) ? sqrtf(A > C ? A : C) : sqrtf(F2 / d);
- d = ApC + r;
- if (d <= 0.f) {
- *b = 0.f;
- *ecc = 1e10f;
- }
- else {
- *b = sqrtf(F2 / d);
- *ecc = *a / *b;
- }
- /* incr theta by 0.5*pi (angle of major axis) */
- *th = 0.5f*(atan2f(B, AmC) + (float)M_PI);
- }
+ ReadEWAData *data = (ReadEWAData *) userdata;
+ ibuf_get_color_clip(result, data->ibuf, x, y, data->AFD->extflag);
}
static void ewa_eval(TexResult *texr, ImBuf *ibuf, float fx, float fy, afdata_t *AFD)
{
- /* scaling dxt/dyt by full resolution can cause overflow because of huge A/B/C and esp. F values,
- * scaling by aspect ratio alone does the opposite, so try something in between instead... */
- const float ff2 = ibuf->x, ff = sqrtf(ff2), q = ibuf->y / ff;
- const float Ux = AFD->dxt[0]*ff, Vx = AFD->dxt[1]*q, Uy = AFD->dyt[0]*ff, Vy = AFD->dyt[1]*q;
- float A = Vx*Vx + Vy*Vy;
- float B = -2.f*(Ux*Vx + Uy*Vy);
- float C = Ux*Ux + Uy*Uy;
- float F = A*C - B*B*0.25f;
- float a, b, th, ecc, a2, b2, ue, ve, U0, V0, DDQ, U, ac1, ac2, BU, d; /* TXF alpha: cw = 0.f; */
- int u, v, u1, u2, v1, v2; /* TXF alpha: clip = 0; */
-
- /* The so-called 'high' quality ewa method simply adds a constant of 1 to both A & C,
- * so the ellipse always covers at least some texels. But since the filter is now always larger,
- * it also means that everywhere else it's also more blurry then ideally should be the case.
- * So instead here the ellipse radii are modified instead whenever either is too low.
- * Use a different radius based on interpolation switch, just enough to anti-alias when interpolation is off,
- * and slightly larger to make result a bit smoother than bilinear interpolation when interpolation is on
- * (minimum values: const float rmin = intpol ? 1.f : 0.5f;) */
- const float rmin = (AFD->intpol ? 1.5625f : 0.765625f)/ff2;
- imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
- if ((b2 = b*b) < rmin) {
- if ((a2 = a*a) < rmin) {
- B = 0.f;
- A = C = rmin;
- F = A*C;
- }
- else {
- b2 = rmin;
- radangle2imp(a2, b2, th, &A, &B, &C, &F);
- }
- }
-
- ue = ff*sqrtf(C);
- ve = ff*sqrtf(A);
- d = (float)(EWA_MAXIDX + 1) / (F*ff2);
- A *= d;
- B *= d;
- C *= d;
-
- U0 = fx*ibuf->x;
- V0 = fy*ibuf->y;
- u1 = (int)(floorf(U0 - ue));
- u2 = (int)(ceilf(U0 + ue));
- v1 = (int)(floorf(V0 - ve));
- v2 = (int)(ceilf(V0 + ve));
- U0 -= 0.5f;
- V0 -= 0.5f;
- DDQ = 2.f*A;
- U = u1 - U0;
- ac1 = A*(2.f*U + 1.f);
- ac2 = A*U*U;
- BU = B*U;
+ ReadEWAData data;
+ float uv[2] = {fx, fy};
+ data.ibuf = ibuf;
+ data.AFD = AFD;
+ BLI_ewa_filter(ibuf->x, ibuf->y,
+ AFD->intpol != 0,
+ texr->talpha,
+ uv, AFD->dxt, AFD->dyt,
+ ewa_read_pixel_cb,
+ &data,
+ &texr->tr);
- d = texr->tr = texr->tb = texr->tg = texr->ta = 0.f;
- for (v=v1; v<=v2; ++v) {
- const float V = v - V0;
- float DQ = ac1 + B*V;
- float Q = (C*V + BU)*V + ac2;
- for (u=u1; u<=u2; ++u) {
- if (Q < (float)(EWA_MAXIDX + 1)) {
- float tc[4];
- const float wt = EWA_WTS[(Q < 0.f) ? 0 : (unsigned int)Q];
- /*const int out =*/ ibuf_get_color_clip(tc, ibuf, u, v, AFD->extflag);
- /* TXF alpha: clip |= out;
- * TXF alpha: cw += out ? 0.f : wt; */
- texr->tr += tc[0]*wt;
- texr->tg += tc[1]*wt;
- texr->tb += tc[2]*wt;
- texr->ta += texr->talpha ? tc[3]*wt : 0.f;
- d += wt;
- }
- Q += DQ;
- DQ += DDQ;
- }
- }
-
- /* d should hopefully never be zero anymore */
- d = 1.f/d;
- texr->tr *= d;
- texr->tg *= d;
- texr->tb *= d;
- /* clipping can be ignored if alpha used, texr->ta already includes filtered edge */
- texr->ta = texr->talpha ? texr->ta*d : 1.f; /* TXF alpha (clip ? cw*d : 1.f); */
}
static void feline_eval(TexResult *texr, ImBuf *ibuf, float fx, float fy, afdata_t *AFD)
@@ -1304,7 +1167,7 @@ static int imagewraposa_aniso(Tex *tex, Image *ima, ImBuf *ibuf, const float tex
const float C = Ux*Ux + Uy*Uy;
const float F = A*C - B*B*0.25f;
float a, b, th, ecc;
- imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
+ BLI_ewa_imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
if (tex->texfilter == TXF_FELINE) {
float fProbes;
a *= ff;
@@ -1408,7 +1271,7 @@ static int imagewraposa_aniso(Tex *tex, Image *ima, ImBuf *ibuf, const float tex
const float C = Ux*Ux + Uy*Uy;
const float F = A*C - B*B*0.25f;
float a, b, th, ecc, fProbes;
- imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
+ BLI_ewa_imp2radangle(A, B, C, F, &a, &b, &th, &ecc);
a *= ff;
b *= ff;
a = max_ff(a, 1.0f);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 10:07:47 +0300