| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkCodecPriv.h" |
| #include "SkColorPriv.h" |
| #include "SkScaledCodec.h" |
| #include "SkSwizzler.h" |
| #include "SkTemplates.h" |
| |
| SkSwizzler::ResultAlpha SkSwizzler::GetResult(uint8_t zeroAlpha, |
| uint8_t maxAlpha) { |
| // In the transparent case, this returns 0x0000 |
| // In the opaque case, this returns 0xFFFF |
| // If the row is neither transparent nor opaque, returns something else |
| return (((uint16_t) maxAlpha) << 8) | zeroAlpha; |
| } |
| |
| // samples the row. Does not do anything else but sampling |
| static SkSwizzler::ResultAlpha sample565(void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, |
| int width, int bpp, int deltaSrc, int offset, const SkPMColor ctable[]){ |
| |
| src += offset; |
| uint16_t* SK_RESTRICT dst = (uint16_t*) dstRow; |
| for (int x = 0; x < width; x++) { |
| dst[x] = src[1] << 8 | src[0]; |
| src += deltaSrc; |
| } |
| // 565 is always opaque |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| // TODO (msarett): Investigate SIMD optimizations for swizzle routines. |
| |
| // kBit |
| // These routines exclusively choose between white and black |
| |
| #define GRAYSCALE_BLACK 0 |
| #define GRAYSCALE_WHITE 0xFF |
| |
| |
| // same as swizzle_bit_to_index and swizzle_bit_to_n32 except for value assigned to dst[x] |
| static SkSwizzler::ResultAlpha swizzle_bit_to_grayscale( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { |
| |
| uint8_t* SK_RESTRICT dst = (uint8_t*) dstRow; |
| |
| // increment src by byte offset and bitIndex by bit offset |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| |
| dst[0] = ((currByte >> (7-bitIndex)) & 1) ? GRAYSCALE_WHITE : GRAYSCALE_BLACK; |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| dst[x] = ((currByte >> (7-bitIndex)) & 1) ? GRAYSCALE_WHITE : GRAYSCALE_BLACK; |
| } |
| |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| #undef GRAYSCALE_BLACK |
| #undef GRAYSCALE_WHITE |
| |
| // same as swizzle_bit_to_grayscale and swizzle_bit_to_n32 except for value assigned to dst[x] |
| static SkSwizzler::ResultAlpha swizzle_bit_to_index( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { |
| uint8_t* SK_RESTRICT dst = (uint8_t*) dstRow; |
| |
| // increment src by byte offset and bitIndex by bit offset |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| |
| dst[0] = ((currByte >> (7-bitIndex)) & 1); |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| dst[x] = ((currByte >> (7-bitIndex)) & 1); |
| } |
| |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| // same as swizzle_bit_to_grayscale and swizzle_bit_to_index except for value assigned to dst[x] |
| static SkSwizzler::ResultAlpha swizzle_bit_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*) dstRow; |
| |
| // increment src by byte offset and bitIndex by bit offset |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| |
| dst[0] = ((currByte >> (7 - bitIndex)) & 1) ? SK_ColorWHITE : SK_ColorBLACK; |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| dst[x] = ((currByte >> (7 - bitIndex)) & 1) ? SK_ColorWHITE : SK_ColorBLACK; |
| } |
| |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| #define RGB565_BLACK 0 |
| #define RGB565_WHITE 0xFFFF |
| |
| static SkSwizzler::ResultAlpha swizzle_bit_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { |
| uint16_t* SK_RESTRICT dst = (uint16_t*) dstRow; |
| |
| // increment src by byte offset and bitIndex by bit offset |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| |
| dst[0] = ((currByte >> (7 - bitIndex)) & 1) ? RGB565_WHITE : RGB565_BLACK; |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| dst[x] = ((currByte >> (7 - bitIndex)) & 1) ? RGB565_WHITE : RGB565_BLACK; |
| } |
| |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| #undef RGB565_BLACK |
| #undef RGB565_WHITE |
| |
| // kIndex1, kIndex2, kIndex4 |
| |
| static SkSwizzler::ResultAlpha swizzle_small_index_to_index( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| uint8_t* dst = (uint8_t*) dstRow; |
| INIT_RESULT_ALPHA; |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| const uint8_t mask = (1 << bpp) - 1; |
| uint8_t index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[0] = index; |
| UPDATE_RESULT_ALPHA(ctable[index] >> SK_A32_SHIFT); |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[x] = index; |
| UPDATE_RESULT_ALPHA(ctable[index] >> SK_A32_SHIFT); |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_small_index_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| uint16_t* dst = (uint16_t*) dstRow; |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| const uint8_t mask = (1 << bpp) - 1; |
| uint8_t index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[0] = SkPixel32ToPixel16(ctable[index]); |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[x] = SkPixel32ToPixel16(ctable[index]); |
| } |
| return SkAlphaType::kOpaque_SkAlphaType; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_small_index_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| SkPMColor* dst = (SkPMColor*) dstRow; |
| INIT_RESULT_ALPHA; |
| src += offset / 8; |
| int bitIndex = offset % 8; |
| uint8_t currByte = *src; |
| const uint8_t mask = (1 << bpp) - 1; |
| uint8_t index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[0] = ctable[index]; |
| UPDATE_RESULT_ALPHA(ctable[index] >> SK_A32_SHIFT); |
| |
| for (int x = 1; x < dstWidth; x++) { |
| int bitOffset = bitIndex + deltaSrc; |
| bitIndex = bitOffset % 8; |
| currByte = *(src += bitOffset / 8); |
| index = (currByte >> (8 - bpp - bitIndex)) & mask; |
| dst[x] = ctable[index]; |
| UPDATE_RESULT_ALPHA(ctable[index] >> SK_A32_SHIFT); |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| // kIndex |
| |
| static SkSwizzler::ResultAlpha swizzle_index_to_index( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| uint8_t* SK_RESTRICT dst = (uint8_t*) dstRow; |
| INIT_RESULT_ALPHA; |
| // TODO (msarett): Should we skip the loop here and guess that the row is opaque/not opaque? |
| // SkScaledBitmap sampler just guesses that it is opaque. This is dangerous |
| // and probably wrong since gif and bmp (rarely) may have alpha. |
| if (1 == deltaSrc) { |
| memcpy(dst, src, dstWidth); |
| for (int x = 0; x < dstWidth; x++) { |
| UPDATE_RESULT_ALPHA(ctable[src[x]] >> SK_A32_SHIFT); |
| } |
| } else { |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = *src; |
| UPDATE_RESULT_ALPHA(ctable[*src] >> SK_A32_SHIFT); |
| src += deltaSrc; |
| } |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_index_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| SkPMColor c = ctable[*src]; |
| UPDATE_RESULT_ALPHA(c >> SK_A32_SHIFT); |
| dst[x] = c; |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_index_to_n32_skipZ( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| SkPMColor c = ctable[*src]; |
| UPDATE_RESULT_ALPHA(c >> SK_A32_SHIFT); |
| if (c != 0) { |
| dst[x] = c; |
| } |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_index_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| // FIXME: Support dithering? Requires knowing y, which I think is a bigger |
| // change. |
| src += offset; |
| uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPixel32ToPixel16(ctable[*src]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| |
| #undef A32_MASK_IN_PLACE |
| |
| // kGray |
| |
| static SkSwizzler::ResultAlpha swizzle_gray_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPackARGB32NoCheck(0xFF, *src, *src, *src); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_gray_to_gray( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| uint8_t* SK_RESTRICT dst = (uint8_t*) dstRow; |
| if (1 == deltaSrc) { |
| memcpy(dstRow, src, dstWidth); |
| } else { |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = src[0]; |
| src += deltaSrc; |
| } |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_gray_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| // FIXME: Support dithering? |
| src += offset; |
| uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPack888ToRGB16(src[0], src[0], src[0]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| // kBGRX |
| |
| static SkSwizzler::ResultAlpha swizzle_bgrx_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPackARGB32NoCheck(0xFF, src[2], src[1], src[0]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_bgrx_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| // FIXME: Support dithering? |
| src += offset; |
| uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPack888ToRGB16(src[2], src[1], src[0]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| // kBGRA |
| |
| static SkSwizzler::ResultAlpha swizzle_bgra_to_n32_unpremul( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| uint8_t alpha = src[3]; |
| UPDATE_RESULT_ALPHA(alpha); |
| dst[x] = SkPackARGB32NoCheck(alpha, src[2], src[1], src[0]); |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_bgra_to_n32_premul( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| uint8_t alpha = src[3]; |
| UPDATE_RESULT_ALPHA(alpha); |
| dst[x] = SkPreMultiplyARGB(alpha, src[2], src[1], src[0]); |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| // kRGBX |
| static SkSwizzler::ResultAlpha swizzle_rgbx_to_n32( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPackARGB32(0xFF, src[0], src[1], src[2]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_rgbx_to_565( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| // FIXME: Support dithering? |
| src += offset; |
| uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; |
| for (int x = 0; x < dstWidth; x++) { |
| dst[x] = SkPack888ToRGB16(src[0], src[1], src[2]); |
| src += deltaSrc; |
| } |
| return SkSwizzler::kOpaque_ResultAlpha; |
| } |
| |
| |
| // kRGBA |
| static SkSwizzler::ResultAlpha swizzle_rgba_to_n32_premul( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| unsigned alpha = src[3]; |
| UPDATE_RESULT_ALPHA(alpha); |
| dst[x] = SkPreMultiplyARGB(alpha, src[0], src[1], src[2]); |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_rgba_to_n32_unpremul( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| uint32_t* SK_RESTRICT dst = reinterpret_cast<uint32_t*>(dstRow); |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| unsigned alpha = src[3]; |
| UPDATE_RESULT_ALPHA(alpha); |
| dst[x] = SkPackARGB32NoCheck(alpha, src[0], src[1], src[2]); |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| static SkSwizzler::ResultAlpha swizzle_rgba_to_n32_premul_skipZ( |
| void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, |
| int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { |
| |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| INIT_RESULT_ALPHA; |
| for (int x = 0; x < dstWidth; x++) { |
| unsigned alpha = src[3]; |
| UPDATE_RESULT_ALPHA(alpha); |
| if (0 != alpha) { |
| dst[x] = SkPreMultiplyARGB(alpha, src[0], src[1], src[2]); |
| } |
| src += deltaSrc; |
| } |
| return COMPUTE_RESULT_ALPHA; |
| } |
| |
| /** |
| FIXME: This was my idea to cheat in order to continue taking advantage of skipping zeroes. |
| This would be fine for drawing normally, but not for drawing with transfer modes. Being |
| honest means we can draw correctly with transfer modes, with the cost of not being able |
| to take advantage of Android's free unwritten pages. Something to keep in mind when we |
| decide whether to switch to unpremul default. |
| static bool swizzle_rgba_to_n32_unpremul_skipZ(void* SK_RESTRICT dstRow, |
| const uint8_t* SK_RESTRICT src, |
| int dstWidth, int bitsPerPixel, int offset, |
| const SkPMColor[]) { |
| src += offset; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; |
| unsigned alphaMask = 0xFF; |
| for (int x = 0; x < dstWidth; x++) { |
| unsigned alpha = src[3]; |
| // NOTE: We cheat here. The caller requested unpremul and skip zeroes. It's possible |
| // the color components are not zero, but we skip them anyway, meaning they'll remain |
| // zero (implied by the request to skip zeroes). |
| if (0 != alpha) { |
| dst[x] = SkPackARGB32NoCheck(alpha, src[0], src[1], src[2]); |
| } |
| src += deltaSrc; |
| alphaMask &= alpha; |
| } |
| return alphaMask != 0xFF; |
| } |
| */ |
| |
| SkSwizzler* SkSwizzler::CreateSwizzler(SkSwizzler::SrcConfig sc, |
| const SkPMColor* ctable, |
| const SkImageInfo& dstInfo, |
| const SkCodec::Options& options) { |
| if (dstInfo.colorType() == kUnknown_SkColorType || kUnknown == sc) { |
| return nullptr; |
| } |
| if ((kIndex == sc || kIndex4 == sc || kIndex2 == sc || kIndex1 == sc) |
| && nullptr == ctable) { |
| return nullptr; |
| } |
| RowProc proc = nullptr; |
| SkCodec::ZeroInitialized zeroInit = options.fZeroInitialized; |
| switch (sc) { |
| case kBit: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_bit_to_n32; |
| break; |
| case kIndex_8_SkColorType: |
| proc = &swizzle_bit_to_index; |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_bit_to_565; |
| break; |
| case kGray_8_SkColorType: |
| proc = &swizzle_bit_to_grayscale; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kIndex1: |
| case kIndex2: |
| case kIndex4: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_small_index_to_n32; |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_small_index_to_565; |
| break; |
| case kIndex_8_SkColorType: |
| proc = &swizzle_small_index_to_index; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kIndex: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| // We assume the color premultiplied ctable (or not) as desired. |
| if (SkCodec::kYes_ZeroInitialized == zeroInit) { |
| proc = &swizzle_index_to_n32_skipZ; |
| break; |
| } else { |
| proc = &swizzle_index_to_n32; |
| break; |
| } |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_index_to_565; |
| break; |
| case kIndex_8_SkColorType: |
| proc = &swizzle_index_to_index; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kGray: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_gray_to_n32; |
| break; |
| case kGray_8_SkColorType: |
| proc = &swizzle_gray_to_gray; |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_gray_to_565; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kBGR: |
| case kBGRX: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_bgrx_to_n32; |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_bgrx_to_565; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kBGRA: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| switch (dstInfo.alphaType()) { |
| case kUnpremul_SkAlphaType: |
| proc = &swizzle_bgra_to_n32_unpremul; |
| break; |
| case kPremul_SkAlphaType: |
| proc = &swizzle_bgra_to_n32_premul; |
| break; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| break; |
| case kRGBX: |
| // TODO: Support other swizzles. |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_rgbx_to_n32; |
| break; |
| case kRGB_565_SkColorType: |
| proc = &swizzle_rgbx_to_565; |
| default: |
| break; |
| } |
| break; |
| case kRGBA: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| if (dstInfo.alphaType() == kUnpremul_SkAlphaType) { |
| // Respect zeroInit? |
| proc = &swizzle_rgba_to_n32_unpremul; |
| } else { |
| if (SkCodec::kYes_ZeroInitialized == zeroInit) { |
| proc = &swizzle_rgba_to_n32_premul_skipZ; |
| } else { |
| proc = &swizzle_rgba_to_n32_premul; |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| break; |
| case kRGB: |
| switch (dstInfo.colorType()) { |
| case kN32_SkColorType: |
| proc = &swizzle_rgbx_to_n32; |
| break; |
| default: |
| break; |
| } |
| break; |
| case kRGB_565: |
| switch (dstInfo.colorType()) { |
| case kRGB_565_SkColorType: |
| proc = &sample565; |
| break; |
| default: |
| break; |
| } |
| default: |
| break; |
| } |
| if (nullptr == proc) { |
| return nullptr; |
| } |
| |
| // Store bpp in bytes if it is an even multiple, otherwise use bits |
| int bpp = SkIsAlign8(BitsPerPixel(sc)) ? BytesPerPixel(sc) : BitsPerPixel(sc); |
| |
| int srcOffset = 0; |
| int srcWidth = dstInfo.width(); |
| if (options.fSubset) { |
| srcOffset = options.fSubset->left(); |
| srcWidth = options.fSubset->width(); |
| } |
| |
| return new SkSwizzler(proc, ctable, srcOffset, srcWidth, bpp); |
| } |
| |
| SkSwizzler::SkSwizzler(RowProc proc, const SkPMColor* ctable, int srcOffset, int srcWidth, int bpp) |
| : fRowProc(proc) |
| , fColorTable(ctable) |
| , fSrcOffset(srcOffset) |
| , fX0(srcOffset) |
| , fSrcWidth(srcWidth) |
| , fDstWidth(srcWidth) |
| , fBPP(bpp) |
| , fSampleX(1) |
| {} |
| |
| int SkSwizzler::onSetSampleX(int sampleX) { |
| SkASSERT(sampleX > 0); // Surely there is an upper limit? Should there be |
| // way to report failure? |
| fSampleX = sampleX; |
| fX0 = get_start_coord(sampleX) + fSrcOffset; |
| fDstWidth = get_scaled_dimension(fSrcWidth, sampleX); |
| |
| // check that fX0 is less than original width |
| SkASSERT(fX0 >= 0 && fX0 < fSrcWidth); |
| return fDstWidth; |
| } |
| |
| SkSwizzler::ResultAlpha SkSwizzler::swizzle(void* dst, const uint8_t* SK_RESTRICT src) { |
| SkASSERT(nullptr != dst && nullptr != src); |
| return fRowProc(dst, src, fDstWidth, fBPP, fSampleX * fBPP, fX0 * fBPP, fColorTable); |
| } |
