| 1810 | // nothing |
| 1811 | #else |
| 1812 | static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) |
| 1813 | { |
| 1814 | int i,j; |
| 1815 | stbi__uint16 *good; |
| 1816 | |
| 1817 | if (req_comp == img_n) return data; |
| 1818 | STBI_ASSERT(req_comp >= 1 && req_comp <= 4); |
| 1819 | |
| 1820 | good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); |
| 1821 | if (good == NULL) { |
| 1822 | STBI_FREE(data); |
| 1823 | return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); |
| 1824 | } |
| 1825 | |
| 1826 | for (j=0; j < (int) y; ++j) { |
| 1827 | stbi__uint16 *src = data + j * x * img_n ; |
| 1828 | stbi__uint16 *dest = good + j * x * req_comp; |
| 1829 | |
| 1830 | #define STBI__COMBO(a,b) ((a)*8+(b)) |
| 1831 | #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) |
| 1832 | // convert source image with img_n components to one with req_comp components; |
| 1833 | // avoid switch per pixel, so use switch per scanline and massive macros |
| 1834 | switch (STBI__COMBO(img_n, req_comp)) { |
| 1835 | STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break; |
| 1836 | STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; |
| 1837 | STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break; |
| 1838 | STBI__CASE(2,1) { dest[0]=src[0]; } break; |
| 1839 | STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; |
| 1840 | STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; |
| 1841 | STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break; |
| 1842 | STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; |
| 1843 | STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break; |
| 1844 | STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; |
| 1845 | STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break; |
| 1846 | STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; |
| 1847 | default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion"); |
| 1848 | } |
| 1849 | #undef STBI__CASE |
| 1850 | } |
| 1851 | |
| 1852 | STBI_FREE(data); |
| 1853 | return good; |
| 1854 | } |
| 1855 | #endif |
| 1856 | |
| 1857 | #ifndef STBI_NO_LINEAR |
no test coverage detected