diff options
| author | Max Horn | 2003-03-02 16:36:52 +0000 |
|---|---|---|
| committer | Max Horn | 2003-03-02 16:36:52 +0000 |
| commit | 086a89f365a26796ba58e1809a7984b5d42cee51 (patch) | |
| tree | 6a830b35d9fbbf186d1eeab46ab4c9224fd2f9cc /common/scaler.cpp | |
| parent | f6bac973f86ea3cf9f756cef7602a1decfc80d6b (diff) | |
| download | scummvm-rg350-086a89f365a26796ba58e1809a7984b5d42cee51.tar.gz scummvm-rg350-086a89f365a26796ba58e1809a7984b5d42cee51.tar.bz2 scummvm-rg350-086a89f365a26796ba58e1809a7984b5d42cee51.zip | |
Patch #691064: dot matrix scaler
svn-id: r6663
Diffstat (limited to 'common/scaler.cpp')
| -rw-r--r-- | common/scaler.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/common/scaler.cpp b/common/scaler.cpp index d0244996b8..78cd5aee53 100644 --- a/common/scaler.cpp +++ b/common/scaler.cpp @@ -32,6 +32,20 @@ static uint32 qlowpixelMask = 0x18631863; static uint32 redblueMask = 0xF81F; static uint32 greenMask = 0x7E0; +static const uint16 dotmatrix_565[16] = { + 0x01E0, 0x0007, 0x3800, 0x0000, + 0x39E7, 0x0000, 0x39E7, 0x0000, + 0x3800, 0x0000, 0x01E0, 0x0007, + 0x39E7, 0x0000, 0x39E7, 0x0000 +}; +static const uint16 dotmatrix_555[16] = { + 0x00E0, 0x0007, 0x1C00, 0x0000, + 0x1CE7, 0x0000, 0x1CE7, 0x0000, + 0x1C00, 0x0000, 0x00E0, 0x0007, + 0x1CE7, 0x0000, 0x1CE7, 0x0000 +}; +static const uint16 *dotmatrix; + int Init_2xSaI(uint32 BitFormat) { if (BitFormat == 565) { @@ -41,6 +55,7 @@ int Init_2xSaI(uint32 BitFormat) qlowpixelMask = 0x18631863; redblueMask = 0xF81F; greenMask = 0x7E0; + dotmatrix = dotmatrix_565; } else if (BitFormat == 555) { colorMask = 0x7BDE7BDE; lowPixelMask = 0x04210421; @@ -48,6 +63,7 @@ int Init_2xSaI(uint32 BitFormat) qlowpixelMask = 0x0C630C63; redblueMask = 0x7C1F; greenMask = 0x3E0; + dotmatrix = dotmatrix_555; } else { return 0; } @@ -830,3 +846,29 @@ void TV2x(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint32 dst q += nextlineDst << 1; } } + +static inline uint16 DOT_16(uint16 c, int j, int i) { + return c - ((c >> 2) & *(dotmatrix + ((j & 3) << 2) + (i & 3))); +} + +void DotMatrix(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint32 dstPitch, + int width, int height) +{ + unsigned int nextlineSrc = srcPitch / sizeof(uint16); + uint16 *p = (uint16 *)srcPtr; + + unsigned int nextlineDst = dstPitch / sizeof(uint16); + uint16 *q = (uint16 *)dstPtr; + + for (int j = 0, jj = 0; j < height; ++j, jj += 2) { + for (int i = 0, ii = 0; i < width; ++i, ii += 2) { + uint16 c = *(p + i); + *(q + ii) = DOT_16(c, jj, ii); + *(q + ii + 1) = DOT_16(c, jj, ii + 1); + *(q + ii + nextlineDst) = DOT_16(c, jj + 1, ii); + *(q + ii + nextlineDst + 1) = DOT_16(c, jj + 1, ii + 1); + } + p += nextlineSrc; + q += nextlineDst << 1; + } +} |