| reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 1 | #define SCALE_FILTER_NAME MAKENAME(_filter_DX_shaderproc) |
| 2 | |
| 3 | #ifndef PREAMBLE |
| 4 | #define PREAMBLE(state) |
| 5 | #define PREAMBLE_PARAM_X |
| 6 | #define PREAMBLE_PARAM_Y |
| 7 | #define PREAMBLE_ARG_X |
| 8 | #define PREAMBLE_ARG_Y |
| 9 | #endif |
| 10 | |
| 11 | |
| 12 | static void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y, |
| 13 | DSTTYPE* SK_RESTRICT colors, int count) { |
| 14 | SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | |
| 15 | SkMatrix::kScale_Mask)) == 0); |
| 16 | SkASSERT(s.fInvKy == 0); |
| 17 | SkASSERT(count > 0 && colors != NULL); |
| 18 | SkASSERT(s.fDoFilter); |
| 19 | SkDEBUGCODE(CHECKSTATE(s);) |
| reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 20 | |
| reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 21 | PREAMBLE(s); |
| reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 22 | |
| reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 23 | const unsigned maxX = s.fBitmap->width() - 1; |
| 24 | const SkFixed oneX = s.fFilterOneX; |
| 25 | const SkFixed dx = s.fInvSx; |
| 26 | SkFixed fx; |
| 27 | const SRCTYPE* SK_RESTRICT row0; |
| 28 | const SRCTYPE* SK_RESTRICT row1; |
| 29 | unsigned subY; |
| 30 | |
| 31 | { |
| 32 | SkPoint pt; |
| 33 | s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, |
| 34 | SkIntToScalar(y) + SK_ScalarHalf, &pt); |
| 35 | SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1); |
| 36 | const unsigned maxY = s.fBitmap->height() - 1; |
| 37 | // compute our two Y values up front |
| 38 | subY = TILEY_LOW_BITS(fy, maxY); |
| 39 | int y0 = TILEY_PROCF(fy, maxY); |
| 40 | int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY); |
| 41 | |
| 42 | const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels(); |
| 43 | unsigned rb = s.fBitmap->rowBytes(); |
| 44 | row0 = (const SRCTYPE*)(srcAddr + y0 * rb); |
| 45 | row1 = (const SRCTYPE*)(srcAddr + y1 * rb); |
| 46 | // now initialize fx |
| 47 | fx = SkScalarToFixed(pt.fX) - (oneX >> 1); |
| 48 | } |
| reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 49 | |
| reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 50 | do { |
| 51 | unsigned subX = TILEX_LOW_BITS(fx, maxX); |
| 52 | unsigned x0 = TILEX_PROCF(fx, maxX); |
| 53 | unsigned x1 = TILEX_PROCF((fx + oneX), maxX); |
| 54 | |
| 55 | uint32_t c = FILTER_PROC(subX, subY, |
| 56 | SRC_TO_FILTER(row0[x0]), |
| 57 | SRC_TO_FILTER(row0[x1]), |
| 58 | SRC_TO_FILTER(row1[x0]), |
| 59 | SRC_TO_FILTER(row1[x1])); |
| 60 | *colors++ = FILTER_TO_DST(c); |
| reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 61 | |
| reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 62 | fx += dx; |
| 63 | } while (--count != 0); |
| 64 | } |
| 65 | |
| 66 | /////////////////////////////////////////////////////////////////////////////// |
| 67 | |
| 68 | #undef MAKENAME |
| 69 | #undef TILEX_PROCF |
| 70 | #undef TILEY_PROCF |
| 71 | #undef TILEX_LOW_BITS |
| 72 | #undef TILEY_LOW_BITS |
| 73 | #ifdef CHECK_FOR_DECAL |
| 74 | #undef CHECK_FOR_DECAL |
| 75 | #endif |
| 76 | |
| 77 | #undef SCALE_FILTER_NAME |
| 78 | |
| 79 | #undef PREAMBLE |
| 80 | #undef PREAMBLE_PARAM_X |
| 81 | #undef PREAMBLE_PARAM_Y |
| 82 | #undef PREAMBLE_ARG_X |
| 83 | #undef PREAMBLE_ARG_Y |