| /* libs/graphics/sgl/SkBlitter_RGB16.cpp |
| ** |
| ** Copyright 2006, 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. |
| */ |
| |
| #include "SkBlitRow.h" |
| #include "SkCoreBlitters.h" |
| #include "SkColorPriv.h" |
| #include "SkDither.h" |
| #include "SkShader.h" |
| #include "SkUtils.h" |
| #include "SkXfermode.h" |
| |
| void sk_dither_memset16(uint16_t dst[], uint16_t value, uint16_t other, |
| int count) { |
| if (count > 0) { |
| // see if we need to write one short before we can cast to an 4byte ptr |
| // (we do this subtract rather than (unsigned)dst so we don't get warnings |
| // on 64bit machines) |
| if (((char*)dst - (char*)0) & 2) { |
| *dst++ = value; |
| count -= 1; |
| SkTSwap(value, other); |
| } |
| |
| // fast way to set [value,other] pairs |
| #ifdef SK_CPU_BENDIAN |
| sk_memset32((uint32_t*)dst, (value << 16) | other, count >> 1); |
| #else |
| sk_memset32((uint32_t*)dst, (other << 16) | value, count >> 1); |
| #endif |
| |
| if (count & 1) { |
| dst[count - 1] = value; |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint) |
| : SkRGB16_Blitter(device, paint) { |
| SkASSERT(paint.getShader() == NULL); |
| SkASSERT(paint.getColorFilter() == NULL); |
| SkASSERT(paint.getXfermode() == NULL); |
| SkASSERT(paint.getColor() == SK_ColorBLACK); |
| } |
| |
| #if 1 |
| #define black_8_pixels(mask, dst) \ |
| do { \ |
| if (mask & 0x80) dst[0] = 0; \ |
| if (mask & 0x40) dst[1] = 0; \ |
| if (mask & 0x20) dst[2] = 0; \ |
| if (mask & 0x10) dst[3] = 0; \ |
| if (mask & 0x08) dst[4] = 0; \ |
| if (mask & 0x04) dst[5] = 0; \ |
| if (mask & 0x02) dst[6] = 0; \ |
| if (mask & 0x01) dst[7] = 0; \ |
| } while (0) |
| #else |
| static inline black_8_pixels(U8CPU mask, uint16_t dst[]) |
| { |
| if (mask & 0x80) dst[0] = 0; |
| if (mask & 0x40) dst[1] = 0; |
| if (mask & 0x20) dst[2] = 0; |
| if (mask & 0x10) dst[3] = 0; |
| if (mask & 0x08) dst[4] = 0; |
| if (mask & 0x04) dst[5] = 0; |
| if (mask & 0x02) dst[6] = 0; |
| if (mask & 0x01) dst[7] = 0; |
| } |
| #endif |
| |
| #define SK_BLITBWMASK_NAME SkRGB16_Black_BlitBW |
| #define SK_BLITBWMASK_ARGS |
| #define SK_BLITBWMASK_BLIT8(mask, dst) black_8_pixels(mask, dst) |
| #define SK_BLITBWMASK_GETADDR getAddr16 |
| #define SK_BLITBWMASK_DEVTYPE uint16_t |
| #include "SkBlitBWMaskTemplate.h" |
| |
| void SkRGB16_Black_Blitter::blitMask(const SkMask& SK_RESTRICT mask, |
| const SkIRect& SK_RESTRICT clip) |
| SK_RESTRICT { |
| if (mask.fFormat == SkMask::kBW_Format) { |
| SkRGB16_Black_BlitBW(fDevice, mask, clip); |
| } else { |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); |
| const uint8_t* SK_RESTRICT alpha = mask.getAddr(clip.fLeft, clip.fTop); |
| unsigned width = clip.width(); |
| unsigned height = clip.height(); |
| unsigned deviceRB = fDevice.rowBytes() - (width << 1); |
| unsigned maskRB = mask.fRowBytes - width; |
| |
| SkASSERT((int)height > 0); |
| SkASSERT((int)width > 0); |
| SkASSERT((int)deviceRB >= 0); |
| SkASSERT((int)maskRB >= 0); |
| |
| do { |
| unsigned w = width; |
| do { |
| unsigned aa = *alpha++; |
| *device = SkAlphaMulRGB16(*device, SkAlpha255To256(255 - aa)); |
| device += 1; |
| } while (--w != 0); |
| device = (uint16_t*)((char*)device + deviceRB); |
| alpha += maskRB; |
| } while (--height != 0); |
| } |
| } |
| |
| void SkRGB16_Black_Blitter::blitAntiH(int x, int y, |
| const SkAlpha* SK_RESTRICT antialias, |
| const int16_t* SK_RESTRICT runs) |
| SK_RESTRICT { |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| |
| for (;;) { |
| int count = runs[0]; |
| SkASSERT(count >= 0); |
| if (count <= 0) { |
| return; |
| } |
| runs += count; |
| |
| unsigned aa = antialias[0]; |
| antialias += count; |
| if (aa) { |
| if (aa == 255) { |
| memset(device, 0, count << 1); |
| } else { |
| aa = SkAlpha255To256(255 - aa); |
| do { |
| *device = SkAlphaMulRGB16(*device, aa); |
| device += 1; |
| } while (--count != 0); |
| continue; |
| } |
| } |
| device += count; |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkRGB16_Blitter::SkRGB16_Blitter(const SkBitmap& device, const SkPaint& paint) |
| : INHERITED(device) { |
| SkColor color = paint.getColor(); |
| |
| fSrcColor32 = SkPreMultiplyColor(color); |
| fScale = SkAlpha255To256(SkColorGetA(color)); |
| |
| int r = SkColorGetR(color); |
| int g = SkColorGetG(color); |
| int b = SkColorGetB(color); |
| |
| fRawColor16 = fRawDither16 = SkPack888ToRGB16(r, g, b); |
| // if we're dithered, use fRawDither16 to hold that. |
| if ((fDoDither = paint.isDither()) != false) { |
| fRawDither16 = SkDitherPack888ToRGB16(r, g, b); |
| } |
| |
| fColor16 = SkPackRGB16( SkAlphaMul(r, fScale) >> (8 - SK_R16_BITS), |
| SkAlphaMul(g, fScale) >> (8 - SK_G16_BITS), |
| SkAlphaMul(b, fScale) >> (8 - SK_B16_BITS)); |
| } |
| |
| const SkBitmap* SkRGB16_Blitter::justAnOpaqueColor(uint32_t* value) { |
| if (!fDoDither && 256 == fScale) { |
| *value = fRawColor16; |
| return &fDevice; |
| } |
| return NULL; |
| } |
| |
| void SkRGB16_Blitter::blitH(int x, int y, int width) SK_RESTRICT { |
| SkASSERT(width > 0); |
| SkASSERT(x + width <= fDevice.width()); |
| |
| if (fScale == 0) { |
| return; |
| } |
| |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| uint16_t srcColor = fColor16; |
| |
| if (256 == fScale) { |
| SkASSERT(fRawColor16 == srcColor); |
| if (fDoDither) { |
| uint16_t ditherColor = fRawDither16; |
| if ((x ^ y) & 1) { |
| SkTSwap(ditherColor, srcColor); |
| } |
| sk_dither_memset16(device, srcColor, ditherColor, width); |
| } else { |
| sk_memset16(device, srcColor, width); |
| } |
| } else { |
| // TODO: respect fDoDither |
| SkPMColor src32 = fSrcColor32; |
| do { |
| *device = SkSrcOver32To16(src32, *device); |
| device += 1; |
| } while (--width != 0); |
| } |
| } |
| |
| // return 1 or 0 from a bool |
| static int Bool2Int(bool value) { |
| return !!value; |
| } |
| |
| void SkRGB16_Blitter::blitAntiH(int x, int y, |
| const SkAlpha* SK_RESTRICT antialias, |
| const int16_t* SK_RESTRICT runs) SK_RESTRICT { |
| if (fScale == 0) { |
| return; |
| } |
| |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| uint16_t srcColor = fRawColor16; |
| unsigned scale = fScale; |
| int ditherInt = Bool2Int(fDoDither); |
| |
| if (256 == scale) { |
| uint16_t ditherColor = fRawDither16; |
| // if we have no dithering, this will always fail |
| if ((x ^ y) & ditherInt) { |
| SkTSwap(ditherColor, srcColor); |
| } |
| for (;;) { |
| int count = runs[0]; |
| SkASSERT(count >= 0); |
| if (count <= 0) { |
| return; |
| } |
| runs += count; |
| |
| unsigned aa = antialias[0]; |
| antialias += count; |
| if (aa) { |
| if (aa == 255) { |
| if (ditherInt) { |
| sk_dither_memset16(device, srcColor, |
| ditherColor, count); |
| } else { |
| sk_memset16(device, srcColor, count); |
| } |
| } else { |
| // TODO: respect fDoDither |
| unsigned scale5 = SkAlpha255To256(aa) >> 3; |
| uint32_t src32 = SkExpand_rgb_16(srcColor) * scale5; |
| scale5 = 32 - scale5; // now we can use it on the device |
| int n = count; |
| do { |
| uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; |
| *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); |
| } while (--n != 0); |
| goto DONE; |
| } |
| } |
| device += count; |
| |
| DONE: |
| // if we have no dithering, this will always fail |
| if (count & ditherInt) { |
| SkTSwap(ditherColor, srcColor); |
| } |
| } |
| } else { |
| // TODO: respect fDoDither |
| for (;;) { |
| int count = runs[0]; |
| SkASSERT(count >= 0); |
| if (count <= 0) { |
| return; |
| } |
| runs += count; |
| |
| unsigned aa = antialias[0]; |
| antialias += count; |
| if (aa) { |
| unsigned scale5 = SkAlpha255To256(aa) * scale >> (8 + 3); |
| uint32_t src32 = SkExpand_rgb_16(srcColor) * scale5; |
| scale5 = 32 - scale5; |
| do { |
| uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; |
| *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); |
| } while (--count != 0); |
| continue; |
| } |
| device += count; |
| } |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| #define solid_8_pixels(mask, dst, color) \ |
| do { \ |
| if (mask & 0x80) dst[0] = color; \ |
| if (mask & 0x40) dst[1] = color; \ |
| if (mask & 0x20) dst[2] = color; \ |
| if (mask & 0x10) dst[3] = color; \ |
| if (mask & 0x08) dst[4] = color; \ |
| if (mask & 0x04) dst[5] = color; \ |
| if (mask & 0x02) dst[6] = color; \ |
| if (mask & 0x01) dst[7] = color; \ |
| } while (0) |
| |
| #define SK_BLITBWMASK_NAME SkRGB16_BlitBW |
| #define SK_BLITBWMASK_ARGS , uint16_t color |
| #define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color) |
| #define SK_BLITBWMASK_GETADDR getAddr16 |
| #define SK_BLITBWMASK_DEVTYPE uint16_t |
| #include "SkBlitBWMaskTemplate.h" |
| |
| static inline void blend_8_pixels(U8CPU bw, uint16_t dst[], unsigned dst_scale, |
| U16CPU srcColor) { |
| if (bw & 0x80) dst[0] = srcColor + SkAlphaMulRGB16(dst[0], dst_scale); |
| if (bw & 0x40) dst[1] = srcColor + SkAlphaMulRGB16(dst[1], dst_scale); |
| if (bw & 0x20) dst[2] = srcColor + SkAlphaMulRGB16(dst[2], dst_scale); |
| if (bw & 0x10) dst[3] = srcColor + SkAlphaMulRGB16(dst[3], dst_scale); |
| if (bw & 0x08) dst[4] = srcColor + SkAlphaMulRGB16(dst[4], dst_scale); |
| if (bw & 0x04) dst[5] = srcColor + SkAlphaMulRGB16(dst[5], dst_scale); |
| if (bw & 0x02) dst[6] = srcColor + SkAlphaMulRGB16(dst[6], dst_scale); |
| if (bw & 0x01) dst[7] = srcColor + SkAlphaMulRGB16(dst[7], dst_scale); |
| } |
| |
| #define SK_BLITBWMASK_NAME SkRGB16_BlendBW |
| #define SK_BLITBWMASK_ARGS , unsigned dst_scale, U16CPU src_color |
| #define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, dst_scale, src_color) |
| #define SK_BLITBWMASK_GETADDR getAddr16 |
| #define SK_BLITBWMASK_DEVTYPE uint16_t |
| #include "SkBlitBWMaskTemplate.h" |
| |
| static U16CPU blend_compact(uint32_t src32, uint32_t dst32, unsigned scale5) { |
| return SkCompact_rgb_16(dst32 + ((src32 - dst32) * scale5 >> 5)); |
| } |
| |
| void SkRGB16_Blitter::blitMask(const SkMask& SK_RESTRICT mask, |
| const SkIRect& SK_RESTRICT clip) SK_RESTRICT { |
| if (fScale == 0) { |
| return; |
| } |
| if (mask.fFormat == SkMask::kBW_Format) { |
| if (fScale == 256) { |
| SkRGB16_BlitBW(fDevice, mask, clip, fColor16); |
| } else { |
| SkRGB16_BlendBW(fDevice, mask, clip, 256 - fScale, fColor16); |
| } |
| return; |
| } |
| |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); |
| const uint8_t* SK_RESTRICT alpha = mask.getAddr(clip.fLeft, clip.fTop); |
| int width = clip.width(); |
| int height = clip.height(); |
| unsigned deviceRB = fDevice.rowBytes() - (width << 1); |
| unsigned maskRB = mask.fRowBytes - width; |
| uint32_t color32 = SkExpand_rgb_16(fRawColor16); |
| |
| if (256 == fScale) { |
| do { |
| int w = width; |
| do { |
| *device = blend_compact(color32, SkExpand_rgb_16(*device), |
| SkAlpha255To256(*alpha++) >> 3); |
| device += 1; |
| } while (--w != 0); |
| device = (uint16_t*)((char*)device + deviceRB); |
| alpha += maskRB; |
| } while (--height != 0); |
| } else { // scale < 256 |
| unsigned scale256 = fScale; |
| do { |
| int w = width; |
| do { |
| unsigned aa = *alpha++; |
| unsigned scale = SkAlpha255To256(aa) * scale256 >> (8 + 3); |
| uint32_t src32 = color32 * scale; |
| uint32_t dst32 = SkExpand_rgb_16(*device) * (32 - scale); |
| *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); |
| } while (--w != 0); |
| device = (uint16_t*)((char*)device + deviceRB); |
| alpha += maskRB; |
| } while (--height != 0); |
| } |
| } |
| |
| void SkRGB16_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| if (fScale == 0) { |
| return; |
| } |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| uint16_t color16 = fRawColor16; |
| unsigned deviceRB = fDevice.rowBytes(); |
| |
| if (alpha + fScale == (255 + 256)) { |
| if (fDoDither) { |
| uint16_t ditherColor = fRawDither16; |
| if ((x ^ y) & 1) { |
| SkTSwap(ditherColor, color16); |
| } |
| do { |
| device[0] = color16; |
| device = (uint16_t*)((char*)device + deviceRB); |
| SkTSwap(ditherColor, color16); |
| } while (--height != 0); |
| } else { |
| do { |
| device[0] = color16; |
| device = (uint16_t*)((char*)device + deviceRB); |
| } while (--height != 0); |
| } |
| } else { |
| // TODO: respect fDoDither |
| unsigned scale5 = SkAlpha255To256(alpha) * fScale >> (8 + 3); |
| uint32_t src32 = SkExpand_rgb_16(color16) * scale5; |
| scale5 = 32 - scale5; |
| do { |
| uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; |
| *device = SkCompact_rgb_16((src32 + dst32) >> 5); |
| device = (uint16_t*)((char*)device + deviceRB); |
| } while (--height != 0); |
| } |
| } |
| |
| void SkRGB16_Blitter::blitRect(int x, int y, int width, int height) { |
| SkASSERT(x + width <= fDevice.width() && y + height <= fDevice.height()); |
| |
| if (fScale == 0) { |
| return; |
| } |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| unsigned deviceRB = fDevice.rowBytes(); |
| uint16_t color16 = fColor16; |
| |
| if (256 == fScale) { |
| if (fDoDither) { |
| uint16_t ditherColor = fRawDither16; |
| if ((x ^ y) & 1) { |
| SkTSwap(ditherColor, color16); |
| } |
| while (--height >= 0) { |
| sk_dither_memset16(device, color16, ditherColor, width); |
| SkTSwap(ditherColor, color16); |
| device = (uint16_t*)((char*)device + deviceRB); |
| } |
| } else { // no dither |
| while (--height >= 0) { |
| sk_memset16(device, color16, width); |
| device = (uint16_t*)((char*)device + deviceRB); |
| } |
| } |
| } else { |
| SkPMColor src32 = fSrcColor32; |
| while (--height >= 0) { |
| for (int i = width - 1; i >= 0; --i) { |
| device[i] = SkSrcOver32To16(src32, device[i]); |
| } |
| device = (uint16_t*)((char*)device + deviceRB); |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkRGB16_Shader16_Blitter::SkRGB16_Shader16_Blitter(const SkBitmap& device, |
| const SkPaint& paint) |
| : SkRGB16_Shader_Blitter(device, paint) { |
| SkASSERT(SkShader::CanCallShadeSpan16(fShader->getFlags())); |
| } |
| |
| void SkRGB16_Shader16_Blitter::blitH(int x, int y, int width) SK_RESTRICT { |
| SkASSERT(x + width <= fDevice.width()); |
| |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| SkShader* shader = fShader; |
| |
| int alpha = shader->getSpan16Alpha(); |
| if (0xFF == alpha) { |
| shader->shadeSpan16(x, y, device, width); |
| } else { |
| uint16_t* span16 = (uint16_t*)fBuffer; |
| shader->shadeSpan16(x, y, span16, width); |
| SkBlendRGB16(span16, device, SkAlpha255To256(alpha), width); |
| } |
| } |
| |
| void SkRGB16_Shader16_Blitter::blitAntiH(int x, int y, |
| const SkAlpha* SK_RESTRICT antialias, |
| const int16_t* SK_RESTRICT runs) |
| SK_RESTRICT { |
| SkShader* shader = fShader; |
| SkPMColor* SK_RESTRICT span = fBuffer; |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| |
| int alpha = shader->getSpan16Alpha(); |
| uint16_t* span16 = (uint16_t*)span; |
| |
| if (0xFF == alpha) { |
| for (;;) { |
| int count = *runs; |
| if (count <= 0) { |
| break; |
| } |
| SkASSERT(count <= fDevice.width()); // don't overrun fBuffer |
| |
| int aa = *antialias; |
| if (aa == 255) { |
| // go direct to the device! |
| shader->shadeSpan16(x, y, device, count); |
| } else if (aa) { |
| shader->shadeSpan16(x, y, span16, count); |
| SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); |
| } |
| device += count; |
| runs += count; |
| antialias += count; |
| x += count; |
| } |
| } else { // span alpha is < 255 |
| alpha = SkAlpha255To256(alpha); |
| for (;;) { |
| int count = *runs; |
| if (count <= 0) { |
| break; |
| } |
| SkASSERT(count <= fDevice.width()); // don't overrun fBuffer |
| |
| int aa = SkAlphaMul(*antialias, alpha); |
| if (aa) { |
| shader->shadeSpan16(x, y, span16, count); |
| SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); |
| } |
| |
| device += count; |
| runs += count; |
| antialias += count; |
| x += count; |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkRGB16_Shader_Blitter::SkRGB16_Shader_Blitter(const SkBitmap& device, |
| const SkPaint& paint) |
| : INHERITED(device, paint) { |
| SkASSERT(paint.getXfermode() == NULL); |
| |
| fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * sizeof(SkPMColor)); |
| |
| // compute SkBlitRow::Procs |
| unsigned flags = 0; |
| |
| uint32_t shaderFlags = fShader->getFlags(); |
| // shaders take care of global alpha, so we never set it in SkBlitRow |
| if (!(shaderFlags & SkShader::kOpaqueAlpha_Flag)) { |
| flags |= SkBlitRow::kSrcPixelAlpha_Flag; |
| } |
| // don't dither if the shader is really 16bit |
| if (paint.isDither() && !(shaderFlags & SkShader::kIntrinsicly16_Flag)) { |
| flags |= SkBlitRow::kDither_Flag; |
| } |
| // used when we know our global alpha is 0xFF |
| fOpaqueProc = SkBlitRow::Factory(flags, SkBitmap::kRGB_565_Config); |
| // used when we know our global alpha is < 0xFF |
| fAlphaProc = SkBlitRow::Factory(flags | SkBlitRow::kGlobalAlpha_Flag, |
| SkBitmap::kRGB_565_Config); |
| } |
| |
| SkRGB16_Shader_Blitter::~SkRGB16_Shader_Blitter() { |
| sk_free(fBuffer); |
| } |
| |
| void SkRGB16_Shader_Blitter::blitH(int x, int y, int width) { |
| SkASSERT(x + width <= fDevice.width()); |
| |
| fShader->shadeSpan(x, y, fBuffer, width); |
| // shaders take care of global alpha, so we pass 0xFF (should be ignored) |
| fOpaqueProc(fDevice.getAddr16(x, y), fBuffer, width, 0xFF, x, y); |
| } |
| |
| static inline int count_nonzero_span(const int16_t runs[], const SkAlpha aa[]) { |
| int count = 0; |
| for (;;) { |
| int n = *runs; |
| if (n == 0 || *aa == 0) { |
| break; |
| } |
| runs += n; |
| aa += n; |
| count += n; |
| } |
| return count; |
| } |
| |
| void SkRGB16_Shader_Blitter::blitAntiH(int x, int y, |
| const SkAlpha* SK_RESTRICT antialias, |
| const int16_t* SK_RESTRICT runs) |
| SK_RESTRICT { |
| SkShader* shader = fShader; |
| SkPMColor* SK_RESTRICT span = fBuffer; |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| |
| for (;;) { |
| int count = *runs; |
| if (count <= 0) { |
| break; |
| } |
| int aa = *antialias; |
| if (0 == aa) { |
| device += count; |
| runs += count; |
| antialias += count; |
| x += count; |
| continue; |
| } |
| |
| int nonZeroCount = count + count_nonzero_span(runs + count, antialias + count); |
| |
| SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer |
| shader->shadeSpan(x, y, span, nonZeroCount); |
| |
| SkPMColor* localSpan = span; |
| for (;;) { |
| SkBlitRow::Proc proc = (aa == 0xFF) ? fOpaqueProc : fAlphaProc; |
| proc(device, localSpan, count, aa, x, y); |
| |
| x += count; |
| device += count; |
| runs += count; |
| antialias += count; |
| nonZeroCount -= count; |
| if (nonZeroCount == 0) { |
| break; |
| } |
| localSpan += count; |
| SkASSERT(nonZeroCount > 0); |
| count = *runs; |
| SkASSERT(count > 0); |
| aa = *antialias; |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////// |
| |
| SkRGB16_Shader_Xfermode_Blitter::SkRGB16_Shader_Xfermode_Blitter( |
| const SkBitmap& device, const SkPaint& paint) |
| : INHERITED(device, paint) { |
| fXfermode = paint.getXfermode(); |
| SkASSERT(fXfermode); |
| fXfermode->ref(); |
| |
| int width = device.width(); |
| fBuffer = (SkPMColor*)sk_malloc_throw((width + (SkAlign4(width) >> 2)) * sizeof(SkPMColor)); |
| fAAExpand = (uint8_t*)(fBuffer + width); |
| } |
| |
| SkRGB16_Shader_Xfermode_Blitter::~SkRGB16_Shader_Xfermode_Blitter() { |
| fXfermode->unref(); |
| sk_free(fBuffer); |
| } |
| |
| void SkRGB16_Shader_Xfermode_Blitter::blitH(int x, int y, int width) { |
| SkASSERT(x + width <= fDevice.width()); |
| |
| uint16_t* device = fDevice.getAddr16(x, y); |
| SkPMColor* span = fBuffer; |
| |
| fShader->shadeSpan(x, y, span, width); |
| fXfermode->xfer16(device, span, width, NULL); |
| } |
| |
| void SkRGB16_Shader_Xfermode_Blitter::blitAntiH(int x, int y, |
| const SkAlpha* SK_RESTRICT antialias, |
| const int16_t* SK_RESTRICT runs) SK_RESTRICT { |
| SkShader* shader = fShader; |
| SkXfermode* mode = fXfermode; |
| SkPMColor* SK_RESTRICT span = fBuffer; |
| uint8_t* SK_RESTRICT aaExpand = fAAExpand; |
| uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); |
| |
| for (;;) { |
| int count = *runs; |
| if (count <= 0) { |
| break; |
| } |
| int aa = *antialias; |
| if (0 == aa) { |
| device += count; |
| runs += count; |
| antialias += count; |
| x += count; |
| continue; |
| } |
| |
| int nonZeroCount = count + count_nonzero_span(runs + count, |
| antialias + count); |
| |
| SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer |
| shader->shadeSpan(x, y, span, nonZeroCount); |
| |
| x += nonZeroCount; |
| SkPMColor* localSpan = span; |
| for (;;) { |
| if (aa == 0xFF) { |
| mode->xfer16(device, localSpan, count, NULL); |
| } else { |
| SkASSERT(aa); |
| memset(aaExpand, aa, count); |
| mode->xfer16(device, localSpan, count, aaExpand); |
| } |
| device += count; |
| runs += count; |
| antialias += count; |
| nonZeroCount -= count; |
| if (nonZeroCount == 0) { |
| break; |
| } |
| localSpan += count; |
| SkASSERT(nonZeroCount > 0); |
| count = *runs; |
| SkASSERT(count > 0); |
| aa = *antialias; |
| } |
| } |
| } |
| |
| //////////////////////// |
| |
| #if 0 |
| static inline uint16_t aa_blendS32D16(SkPMColor src, U16CPU dst, int aa |
| #ifdef DITHER_SHADER |
| , int dither |
| #endif |
| ) |
| { |
| SkASSERT((unsigned)aa <= 255); |
| |
| int src_scale = SkAlpha255To256(aa); |
| int sa = SkGetPackedA32(src); |
| int dst_scale = SkAlpha255To256(255 - SkAlphaMul(sa, src_scale)); |
| |
| #ifdef DITHER_SHADER |
| int sr = SkGetPackedR32(src); |
| int sg = SkGetPackedG32(src); |
| int sb = SkGetPackedB32(src); |
| sr = SkDITHER_R32To16(sr, dither); |
| sg = SkDITHER_G32To16(sg, dither); |
| sb = SkDITHER_B32To16(sb, dither); |
| #else |
| int sr = SkPacked32ToR16(src); |
| int sg = SkPacked32ToG16(src); |
| int sb = SkPacked32ToB16(src); |
| #endif |
| |
| int dr = (sr * src_scale + SkGetPackedR16(dst) * dst_scale) >> 8; |
| int dg = (sg * src_scale + SkGetPackedG16(dst) * dst_scale) >> 8; |
| int db = (sb * src_scale + SkGetPackedB16(dst) * dst_scale) >> 8; |
| |
| return SkPackRGB16(dr, dg, db); |
| } |
| #endif |
| |
