diff options
Diffstat (limited to 'libglitter_redistribute_energy_double.c')
| -rw-r--r-- | libglitter_redistribute_energy_double.c | 110 |
1 files changed, 105 insertions, 5 deletions
diff --git a/libglitter_redistribute_energy_double.c b/libglitter_redistribute_energy_double.c index ce889de..6b57c0e 100644 --- a/libglitter_redistribute_energy_double.c +++ b/libglitter_redistribute_energy_double.c @@ -36,7 +36,7 @@ vconvolute(double *restrict raster, size_t rowsize, size_t width, size_t height, for (y = 0; y < kernelsize - 1; y++) { for (x = 0; x < width; x++) raster[x] *= kernel[0]; - for (i = 1; i < kernelsize - i - y; i++) + for (i = 1; i < kernelsize - 1 - y; i++) for (x = 0; x < width; x++) raster[x] = fma(raster[x + i * rowsize], kernel[i], raster[x]); raster = &raster[rowsize]; @@ -113,8 +113,8 @@ eq(double a, double b) int main(void) { - double raster[100], hkern[15], vkern[15]; - size_t i; + double raster[100], hkern[5], vkern[5]; + size_t i, j; for (i = 0; i < sizeof(raster) / sizeof(*raster); i++) raster[i] = (double)i; @@ -200,8 +200,108 @@ main(void) if (i != 15 && i != 25 && i != 35 && i != 55 && i != 65 && i != 75) ASSERT(!raster[i]); - /* TODO test edges */ - /* TODO test hkern+vkern */ + memset(raster, 0, sizeof(raster)); + for (j = 20; j < 100; j += 10) + for (i = 2; i < 10; i += 1) + raster[j + i] = 1; + vkern[0] = 1 / 3.; + vkern[1] = 1 / 3.; + vkern[2] = 1 / 3.; + hkern[0] = 1 / 3.; + hkern[1] = 1 / 3.; + hkern[2] = 1 / 3.; + libglitter_redistribute_energy_double(&raster[22], 10, 8, 8, 3, 3, hkern, vkern); + for (j = 0; j < 100; j += 10) + for (i = 0; i < 10; i += 1) + ASSERT(eq(raster[j + i], + ((i == 0 || i == 9) ? 1 / 3. : + (i == 1 || i == 8) ? 2 / 3. : 1.) * + ((j == 0 || j == 90) ? 1 / 3. : + (j == 10 || j == 80) ? 2 / 3. : 1.))); + + memset(raster, 0, sizeof(raster)); + for (j = 20; j < 100; j += 10) + for (i = 2; i < 10; i += 1) + raster[j + i] = 1; + vkern[0] = 1 / 3.; + vkern[1] = 1 / 3.; + vkern[2] = 1 / 3.; + hkern[0] = 2 / 9.; + hkern[1] = 5 / 9.; + hkern[2] = 2 / 9.; + libglitter_redistribute_energy_double(&raster[22], 10, 8, 8, 3, 3, hkern, vkern); + for (j = 0; j < 100; j += 10) + for (i = 0; i < 10; i += 1) + ASSERT(eq(raster[j + i], + ((i == 0 || i == 9) ? 2 / 9. : + (i == 1 || i == 8) ? 7 / 9. : 1.) * + ((j == 0 || j == 90) ? 1 / 3. : + (j == 10 || j == 80) ? 2 / 3. : 1.))); + + memset(raster, 0, sizeof(raster)); + for (j = 20; j < 100; j += 10) + for (i = 2; i < 10; i += 1) + raster[j + i] = 1; + vkern[0] = 2 / 9.; + vkern[1] = 5 / 9.; + vkern[2] = 2 / 9.; + hkern[0] = 1 / 3.; + hkern[1] = 1 / 3.; + hkern[2] = 1 / 3.; + libglitter_redistribute_energy_double(&raster[22], 10, 8, 8, 3, 3, hkern, vkern); + for (j = 0; j < 100; j += 10) + for (i = 0; i < 10; i += 1) + ASSERT(eq(raster[j + i], + ((i == 0 || i == 9) ? 1 / 3. : + (i == 1 || i == 8) ? 2 / 3. : 1.) * + ((j == 0 || j == 90) ? 2 / 9. : + (j == 10 || j == 80) ? 7 / 9. : 1.))); + + memset(raster, 0, sizeof(raster)); + for (j = 20; j < 100; j += 10) + for (i = 2; i < 10; i += 1) + raster[j + i] = 1; + vkern[0] = 2 / 9.; + vkern[1] = 5 / 9.; + vkern[2] = 2 / 9.; + hkern[0] = 2 / 9.; + hkern[1] = 5 / 9.; + hkern[2] = 2 / 9.; + libglitter_redistribute_energy_double(&raster[22], 10, 8, 8, 3, 3, hkern, vkern); + for (j = 0; j < 100; j += 10) + for (i = 0; i < 10; i += 1) + ASSERT(eq(raster[j + i], + ((i == 0 || i == 9) ? 2 / 9. : + (i == 1 || i == 8) ? 7 / 9. : 1.) * + ((j == 0 || j == 90) ? 2 / 9. : + (j == 10 || j == 80) ? 7 / 9. : 1.))); + + memset(raster, 0, sizeof(raster)); + for (j = 40; j < 100; j += 10) + for (i = 4; i < 10; i += 1) + raster[j + i] = 1; + vkern[0] = 1 / 5.; + vkern[1] = 1 / 5.; + vkern[2] = 1 / 5.; + vkern[3] = 1 / 5.; + vkern[4] = 1 / 5.; + hkern[0] = 1 / 9.; + hkern[1] = 2 / 9.; + hkern[2] = 3 / 9.; + hkern[3] = 2 / 9.; + hkern[4] = 1 / 9.; + libglitter_redistribute_energy_double(&raster[44], 10, 6, 6, 5, 5, hkern, vkern); + for (j = 0; j < 100; j += 10) + for (i = 0; i < 10; i += 1) + ASSERT(eq(raster[j + i], + ((i == 0 || i == 9) ? 1 / 9. : + (i == 1 || i == 8) ? 3 / 9. : + (i == 2 || i == 7) ? 6 / 9. : + (i == 3 || i == 6) ? 8 / 9. : 1.) * + ((j == 0 || j == 90) ? 1 / 5. : + (j == 10 || j == 80) ? 2 / 5. : + (j == 20 || j == 70) ? 3 / 5. : + (j == 30 || j == 60) ? 4 / 5. : 1.))); return 0; } |