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-rw-r--r--skia/include/SkDither.h205
1 files changed, 0 insertions, 205 deletions
diff --git a/skia/include/SkDither.h b/skia/include/SkDither.h
deleted file mode 100644
index 5b2552d..0000000
--- a/skia/include/SkDither.h
+++ /dev/null
@@ -1,205 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef SkDither_DEFINED
-#define SkDither_DEFINED
-
-#include "SkColorPriv.h"
-
-#define SK_DitherValueMax4444 15
-#define SK_DitherValueMax565 7
-
-/* need to use macros for bit-counts for each component, and then
- move these into SkColorPriv.h
-*/
-
-#define SkDITHER_R32_FOR_565_MACRO(r, d) (r + d - (r >> 5))
-#define SkDITHER_G32_FOR_565_MACRO(g, d) (g + (d >> 1) - (g >> 6))
-#define SkDITHER_B32_FOR_565_MACRO(b, d) (b + d - (b >> 5))
-
-#define SkDITHER_A32_FOR_4444_MACRO(a, d) (a + 15 - (a >> 4))
-#define SkDITHER_R32_FOR_4444_MACRO(r, d) (r + d - (r >> 4))
-#define SkDITHER_G32_FOR_4444_MACRO(g, d) (g + d - (g >> 4))
-#define SkDITHER_B32_FOR_4444_MACRO(b, d) (b + d - (b >> 4))
-
-#ifdef SK_DEBUG
- inline unsigned SkDITHER_R32_FOR_565(unsigned r, unsigned d)
- {
- SkASSERT(d <= SK_DitherValueMax565);
- SkA32Assert(r);
- r = SkDITHER_R32_FOR_565_MACRO(r, d);
- SkA32Assert(r);
- return r;
- }
- inline unsigned SkDITHER_G32_FOR_565(unsigned g, unsigned d)
- {
- SkASSERT(d <= SK_DitherValueMax565);
- SkG32Assert(g);
- g = SkDITHER_G32_FOR_565_MACRO(g, d);
- SkG32Assert(g);
- return g;
- }
- inline unsigned SkDITHER_B32_FOR_565(unsigned b, unsigned d)
- {
- SkASSERT(d <= SK_DitherValueMax565);
- SkB32Assert(b);
- b = SkDITHER_B32_FOR_565_MACRO(b, d);
- SkB32Assert(b);
- return b;
- }
-#else
- #define SkDITHER_R32_FOR_565(r, d) SkDITHER_R32_FOR_565_MACRO(r, d)
- #define SkDITHER_G32_FOR_565(g, d) SkDITHER_G32_FOR_565_MACRO(g, d)
- #define SkDITHER_B32_FOR_565(b, d) SkDITHER_B32_FOR_565_MACRO(b, d)
-#endif
-
-#define SkDITHER_R32To565(r, d) SkR32ToR16(SkDITHER_R32_FOR_565(r, d))
-#define SkDITHER_G32To565(g, d) SkG32ToG16(SkDITHER_G32_FOR_565(g, d))
-#define SkDITHER_B32To565(b, d) SkB32ToB16(SkDITHER_B32_FOR_565(b, d))
-
-#define SkDITHER_A32To4444(a, d) SkA32To4444(SkDITHER_A32_FOR_4444_MACRO(a, d))
-#define SkDITHER_R32To4444(r, d) SkR32To4444(SkDITHER_R32_FOR_4444_MACRO(r, d))
-#define SkDITHER_G32To4444(g, d) SkG32To4444(SkDITHER_G32_FOR_4444_MACRO(g, d))
-#define SkDITHER_B32To4444(b, d) SkB32To4444(SkDITHER_B32_FOR_4444_MACRO(b, d))
-
-static inline SkPMColor SkDitherARGB32For565(SkPMColor c, unsigned dither)
-{
- SkASSERT(dither <= SK_DitherValueMax565);
-
- unsigned sa = SkGetPackedA32(c);
- dither = SkAlphaMul(dither, SkAlpha255To256(sa));
-
- unsigned sr = SkGetPackedR32(c);
- unsigned sg = SkGetPackedG32(c);
- unsigned sb = SkGetPackedB32(c);
- sr = SkDITHER_R32_FOR_565(sr, dither);
- sg = SkDITHER_G32_FOR_565(sg, dither);
- sb = SkDITHER_B32_FOR_565(sb, dither);
-
- return SkPackARGB32(sa, sr, sg, sb);
-}
-
-static inline SkPMColor SkDitherRGB32For565(SkPMColor c, unsigned dither)
-{
- SkASSERT(dither <= SK_DitherValueMax565);
-
- unsigned sr = SkGetPackedR32(c);
- unsigned sg = SkGetPackedG32(c);
- unsigned sb = SkGetPackedB32(c);
- sr = SkDITHER_R32_FOR_565(sr, dither);
- sg = SkDITHER_G32_FOR_565(sg, dither);
- sb = SkDITHER_B32_FOR_565(sb, dither);
-
- return SkPackARGB32(0xFF, sr, sg, sb);
-}
-
-static inline uint16_t SkDitherRGBTo565(U8CPU r, U8CPU g, U8CPU b,
- unsigned dither)
-{
- SkASSERT(dither <= SK_DitherValueMax565);
- r = SkDITHER_R32To565(r, dither);
- g = SkDITHER_G32To565(g, dither);
- b = SkDITHER_B32To565(b, dither);
- return SkPackRGB16(r, g, b);
-}
-
-static inline uint16_t SkDitherRGB32To565(SkPMColor c, unsigned dither)
-{
- SkASSERT(dither <= SK_DitherValueMax565);
-
- unsigned sr = SkGetPackedR32(c);
- unsigned sg = SkGetPackedG32(c);
- unsigned sb = SkGetPackedB32(c);
- sr = SkDITHER_R32To565(sr, dither);
- sg = SkDITHER_G32To565(sg, dither);
- sb = SkDITHER_B32To565(sb, dither);
-
- return SkPackRGB16(sr, sg, sb);
-}
-
-static inline uint16_t SkDitherARGB32To565(U8CPU sa, SkPMColor c, unsigned dither)
-{
- SkASSERT(dither <= SK_DitherValueMax565);
- dither = SkAlphaMul(dither, SkAlpha255To256(sa));
-
- unsigned sr = SkGetPackedR32(c);
- unsigned sg = SkGetPackedG32(c);
- unsigned sb = SkGetPackedB32(c);
- sr = SkDITHER_R32To565(sr, dither);
- sg = SkDITHER_G32To565(sg, dither);
- sb = SkDITHER_B32To565(sb, dither);
-
- return SkPackRGB16(sr, sg, sb);
-}
-
-///////////////////////// 4444
-
-static inline SkPMColor16 SkDitherARGB32To4444(U8CPU a, U8CPU r, U8CPU g,
- U8CPU b, unsigned dither)
-{
- dither = SkAlphaMul(dither, SkAlpha255To256(a));
-
- a = SkDITHER_A32To4444(a, dither);
- r = SkDITHER_R32To4444(r, dither);
- g = SkDITHER_G32To4444(g, dither);
- b = SkDITHER_B32To4444(b, dither);
-
- return SkPackARGB4444(a, r, g, b);
-}
-
-static inline SkPMColor16 SkDitherARGB32To4444(SkPMColor c, unsigned dither)
-{
- unsigned a = SkGetPackedA32(c);
- unsigned r = SkGetPackedR32(c);
- unsigned g = SkGetPackedG32(c);
- unsigned b = SkGetPackedB32(c);
-
- dither = SkAlphaMul(dither, SkAlpha255To256(a));
-
- a = SkDITHER_A32To4444(a, dither);
- r = SkDITHER_R32To4444(r, dither);
- g = SkDITHER_G32To4444(g, dither);
- b = SkDITHER_B32To4444(b, dither);
-
- return SkPackARGB4444(a, r, g, b);
-}
-
-// TODO: need dither routines for 565 -> 4444
-
-// this toggles between a 4x4 and a 1x4 array
-//#define ENABLE_DITHER_MATRIX_4X4
-
-#ifdef ENABLE_DITHER_MATRIX_4X4
- extern const uint8_t gDitherMatrix_4Bit_4X4[4][4];
- extern const uint8_t gDitherMatrix_3Bit_4X4[4][4];
-
- #define DITHER_4444_SCAN(y) const uint8_t* dither_scan = gDitherMatrix_4Bit_4X4[(y) & 3]
- #define DITHER_565_SCAN(y) const uint8_t* dither_scan = gDitherMatrix_3Bit_4X4[(y) & 3]
-
- #define DITHER_VALUE(x) dither_scan[(x) & 3]
-#else
- extern const uint16_t gDitherMatrix_4Bit_16[4];
- extern const uint16_t gDitherMatrix_3Bit_16[4];
-
- #define DITHER_4444_SCAN(y) const uint16_t dither_scan = gDitherMatrix_4Bit_16[(y) & 3]
- #define DITHER_565_SCAN(y) const uint16_t dither_scan = gDitherMatrix_3Bit_16[(y) & 3]
-
- #define DITHER_VALUE(x) ((dither_scan >> (((x) & 3) << 2)) & 0xF)
-#endif
-
-#define DITHER_INC_X(x) ++(x)
-
-#endif
generated by cgit v1.1 at 2025-10-14 13:27:48 +0000