diff options
Diffstat (limited to 'external/stb')
| -rw-r--r-- | external/stb/stb_image_resize.h | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/external/stb/stb_image_resize.h b/external/stb/stb_image_resize.h index 8d1b260..c8a2567 100644 --- a/external/stb/stb_image_resize.h +++ b/external/stb/stb_image_resize.h @@ -1,4 +1,4 @@ -/* stb_image_resize - v0.96 - public domain image resizing +/* stb_image_resize - v0.97 - public domain image resizing by Jorge L Rodriguez (@VinoBS) - 2014 http://github.com/nothings/stb @@ -1064,7 +1064,11 @@ static void stbir__calculate_coefficients_upsample(stbir_filter filter, float sc total_filter += coefficient_group[i]; } - STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(in_last_pixel + 1) + 0.5f - in_center_of_out, 1/scale) == 0); + // NOTE(fg): Not actually true in general, nor is there any reason to expect it should be. + // It would be true in exact math but is at best approximately true in floating-point math, + // and it would not make sense to try and put actual bounds on this here because it depends + // on the image aspect ratio which can get pretty extreme. + //STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(in_last_pixel + 1) + 0.5f - in_center_of_out, 1/scale) == 0); STBIR_ASSERT(total_filter > 0.9); STBIR_ASSERT(total_filter < 1.1f); // Make sure it's not way off. @@ -1089,7 +1093,7 @@ static void stbir__calculate_coefficients_downsample(stbir_filter filter, float { int i; - STBIR_ASSERT(out_last_pixel - out_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(scale_ratio) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical. + STBIR_ASSERT(out_last_pixel - out_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(scale_ratio) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical. contributor->n0 = out_first_pixel; contributor->n1 = out_last_pixel; @@ -1103,7 +1107,11 @@ static void stbir__calculate_coefficients_downsample(stbir_filter filter, float coefficient_group[i] = stbir__filter_info_table[filter].kernel(x, scale_ratio) * scale_ratio; } - STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(out_last_pixel + 1) + 0.5f - out_center_of_in, scale_ratio) == 0); + // NOTE(fg): Not actually true in general, nor is there any reason to expect it should be. + // It would be true in exact math but is at best approximately true in floating-point math, + // and it would not make sense to try and put actual bounds on this here because it depends + // on the image aspect ratio which can get pretty extreme. + //STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(out_last_pixel + 1) + 0.5f - out_center_of_in, scale_ratio) == 0); for (i = out_last_pixel - out_first_pixel; i >= 0; i--) { @@ -1552,7 +1560,6 @@ static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float { int out_pixel_index = k * 1; float coefficient = horizontal_coefficients[coefficient_group + k - n0]; - STBIR_ASSERT(coefficient != 0); output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient; } } @@ -1573,7 +1580,6 @@ static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float { int out_pixel_index = k * 2; float coefficient = horizontal_coefficients[coefficient_group + k - n0]; - STBIR_ASSERT(coefficient != 0); output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient; output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient; } @@ -1595,7 +1601,6 @@ static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float { int out_pixel_index = k * 3; float coefficient = horizontal_coefficients[coefficient_group + k - n0]; - STBIR_ASSERT(coefficient != 0); output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient; output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient; output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient; @@ -1618,7 +1623,6 @@ static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float { int out_pixel_index = k * 4; float coefficient = horizontal_coefficients[coefficient_group + k - n0]; - STBIR_ASSERT(coefficient != 0); output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient; output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient; output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient; @@ -1643,7 +1647,6 @@ static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float int c; int out_pixel_index = k * channels; float coefficient = horizontal_coefficients[coefficient_group + k - n0]; - STBIR_ASSERT(coefficient != 0); for (c = 0; c < channels; c++) output_buffer[out_pixel_index + c] += decode_buffer[in_pixel_index + c] * coefficient; } |