1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkBlitter_ARGB32.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,638 @@
1.4 +/*
1.5 + * Copyright 2006 The Android Open Source Project
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#include "SkCoreBlitters.h"
1.12 +#include "SkColorPriv.h"
1.13 +#include "SkShader.h"
1.14 +#include "SkUtils.h"
1.15 +#include "SkXfermode.h"
1.16 +#include "SkBlitMask.h"
1.17 +
1.18 +///////////////////////////////////////////////////////////////////////////////
1.19 +
1.20 +static void SkARGB32_Blit32(const SkBitmap& device, const SkMask& mask,
1.21 + const SkIRect& clip, SkPMColor srcColor) {
1.22 + U8CPU alpha = SkGetPackedA32(srcColor);
1.23 + unsigned flags = SkBlitRow::kSrcPixelAlpha_Flag32;
1.24 + if (alpha != 255) {
1.25 + flags |= SkBlitRow::kGlobalAlpha_Flag32;
1.26 + }
1.27 + SkBlitRow::Proc32 proc = SkBlitRow::Factory32(flags);
1.28 +
1.29 + int x = clip.fLeft;
1.30 + int y = clip.fTop;
1.31 + int width = clip.width();
1.32 + int height = clip.height();
1.33 +
1.34 + SkPMColor* dstRow = device.getAddr32(x, y);
1.35 + const SkPMColor* srcRow = reinterpret_cast<const SkPMColor*>(mask.getAddr8(x, y));
1.36 +
1.37 + do {
1.38 + proc(dstRow, srcRow, width, alpha);
1.39 + dstRow = (SkPMColor*)((char*)dstRow + device.rowBytes());
1.40 + srcRow = (const SkPMColor*)((const char*)srcRow + mask.fRowBytes);
1.41 + } while (--height != 0);
1.42 +}
1.43 +
1.44 +//////////////////////////////////////////////////////////////////////////////////////
1.45 +
1.46 +SkARGB32_Blitter::SkARGB32_Blitter(const SkBitmap& device, const SkPaint& paint)
1.47 + : INHERITED(device) {
1.48 + SkColor color = paint.getColor();
1.49 + fColor = color;
1.50 +
1.51 + fSrcA = SkColorGetA(color);
1.52 + unsigned scale = SkAlpha255To256(fSrcA);
1.53 + fSrcR = SkAlphaMul(SkColorGetR(color), scale);
1.54 + fSrcG = SkAlphaMul(SkColorGetG(color), scale);
1.55 + fSrcB = SkAlphaMul(SkColorGetB(color), scale);
1.56 +
1.57 + fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB);
1.58 + fColor32Proc = SkBlitRow::ColorProcFactory();
1.59 + fColorRect32Proc = SkBlitRow::ColorRectProcFactory();
1.60 +}
1.61 +
1.62 +const SkBitmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) {
1.63 + if (255 == fSrcA) {
1.64 + *value = fPMColor;
1.65 + return &fDevice;
1.66 + }
1.67 + return NULL;
1.68 +}
1.69 +
1.70 +#if defined _WIN32 && _MSC_VER >= 1300 // disable warning : local variable used without having been initialized
1.71 +#pragma warning ( push )
1.72 +#pragma warning ( disable : 4701 )
1.73 +#endif
1.74 +
1.75 +void SkARGB32_Blitter::blitH(int x, int y, int width) {
1.76 + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
1.77 +
1.78 + uint32_t* device = fDevice.getAddr32(x, y);
1.79 + fColor32Proc(device, device, width, fPMColor);
1.80 +}
1.81 +
1.82 +void SkARGB32_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
1.83 + const int16_t runs[]) {
1.84 + if (fSrcA == 0) {
1.85 + return;
1.86 + }
1.87 +
1.88 + uint32_t color = fPMColor;
1.89 + uint32_t* device = fDevice.getAddr32(x, y);
1.90 + unsigned opaqueMask = fSrcA; // if fSrcA is 0xFF, then we will catch the fast opaque case
1.91 +
1.92 + for (;;) {
1.93 + int count = runs[0];
1.94 + SkASSERT(count >= 0);
1.95 + if (count <= 0) {
1.96 + return;
1.97 + }
1.98 + unsigned aa = antialias[0];
1.99 + if (aa) {
1.100 + if ((opaqueMask & aa) == 255) {
1.101 + sk_memset32(device, color, count);
1.102 + } else {
1.103 + uint32_t sc = SkAlphaMulQ(color, SkAlpha255To256(aa));
1.104 + fColor32Proc(device, device, count, sc);
1.105 + }
1.106 + }
1.107 + runs += count;
1.108 + antialias += count;
1.109 + device += count;
1.110 + }
1.111 +}
1.112 +
1.113 +//////////////////////////////////////////////////////////////////////////////////////
1.114 +
1.115 +#define solid_8_pixels(mask, dst, color) \
1.116 + do { \
1.117 + if (mask & 0x80) dst[0] = color; \
1.118 + if (mask & 0x40) dst[1] = color; \
1.119 + if (mask & 0x20) dst[2] = color; \
1.120 + if (mask & 0x10) dst[3] = color; \
1.121 + if (mask & 0x08) dst[4] = color; \
1.122 + if (mask & 0x04) dst[5] = color; \
1.123 + if (mask & 0x02) dst[6] = color; \
1.124 + if (mask & 0x01) dst[7] = color; \
1.125 + } while (0)
1.126 +
1.127 +#define SK_BLITBWMASK_NAME SkARGB32_BlitBW
1.128 +#define SK_BLITBWMASK_ARGS , SkPMColor color
1.129 +#define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color)
1.130 +#define SK_BLITBWMASK_GETADDR getAddr32
1.131 +#define SK_BLITBWMASK_DEVTYPE uint32_t
1.132 +#include "SkBlitBWMaskTemplate.h"
1.133 +
1.134 +#define blend_8_pixels(mask, dst, sc, dst_scale) \
1.135 + do { \
1.136 + if (mask & 0x80) { dst[0] = sc + SkAlphaMulQ(dst[0], dst_scale); } \
1.137 + if (mask & 0x40) { dst[1] = sc + SkAlphaMulQ(dst[1], dst_scale); } \
1.138 + if (mask & 0x20) { dst[2] = sc + SkAlphaMulQ(dst[2], dst_scale); } \
1.139 + if (mask & 0x10) { dst[3] = sc + SkAlphaMulQ(dst[3], dst_scale); } \
1.140 + if (mask & 0x08) { dst[4] = sc + SkAlphaMulQ(dst[4], dst_scale); } \
1.141 + if (mask & 0x04) { dst[5] = sc + SkAlphaMulQ(dst[5], dst_scale); } \
1.142 + if (mask & 0x02) { dst[6] = sc + SkAlphaMulQ(dst[6], dst_scale); } \
1.143 + if (mask & 0x01) { dst[7] = sc + SkAlphaMulQ(dst[7], dst_scale); } \
1.144 + } while (0)
1.145 +
1.146 +#define SK_BLITBWMASK_NAME SkARGB32_BlendBW
1.147 +#define SK_BLITBWMASK_ARGS , uint32_t sc, unsigned dst_scale
1.148 +#define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, sc, dst_scale)
1.149 +#define SK_BLITBWMASK_GETADDR getAddr32
1.150 +#define SK_BLITBWMASK_DEVTYPE uint32_t
1.151 +#include "SkBlitBWMaskTemplate.h"
1.152 +
1.153 +void SkARGB32_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
1.154 + SkASSERT(mask.fBounds.contains(clip));
1.155 + SkASSERT(fSrcA != 0xFF);
1.156 +
1.157 + if (fSrcA == 0) {
1.158 + return;
1.159 + }
1.160 +
1.161 + if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) {
1.162 + return;
1.163 + }
1.164 +
1.165 + if (mask.fFormat == SkMask::kBW_Format) {
1.166 + SkARGB32_BlendBW(fDevice, mask, clip, fPMColor, SkAlpha255To256(255 - fSrcA));
1.167 + } else if (SkMask::kARGB32_Format == mask.fFormat) {
1.168 + SkARGB32_Blit32(fDevice, mask, clip, fPMColor);
1.169 + }
1.170 +}
1.171 +
1.172 +void SkARGB32_Opaque_Blitter::blitMask(const SkMask& mask,
1.173 + const SkIRect& clip) {
1.174 + SkASSERT(mask.fBounds.contains(clip));
1.175 +
1.176 + if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) {
1.177 + return;
1.178 + }
1.179 +
1.180 + if (mask.fFormat == SkMask::kBW_Format) {
1.181 + SkARGB32_BlitBW(fDevice, mask, clip, fPMColor);
1.182 + } else if (SkMask::kARGB32_Format == mask.fFormat) {
1.183 + SkARGB32_Blit32(fDevice, mask, clip, fPMColor);
1.184 + }
1.185 +}
1.186 +
1.187 +///////////////////////////////////////////////////////////////////////////////
1.188 +
1.189 +void SkARGB32_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
1.190 + if (alpha == 0 || fSrcA == 0) {
1.191 + return;
1.192 + }
1.193 +
1.194 + uint32_t* device = fDevice.getAddr32(x, y);
1.195 + uint32_t color = fPMColor;
1.196 +
1.197 + if (alpha != 255) {
1.198 + color = SkAlphaMulQ(color, SkAlpha255To256(alpha));
1.199 + }
1.200 +
1.201 + unsigned dst_scale = 255 - SkGetPackedA32(color);
1.202 + size_t rowBytes = fDevice.rowBytes();
1.203 + while (--height >= 0) {
1.204 + device[0] = color + SkAlphaMulQ(device[0], dst_scale);
1.205 + device = (uint32_t*)((char*)device + rowBytes);
1.206 + }
1.207 +}
1.208 +
1.209 +void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) {
1.210 + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width() && y + height <= fDevice.height());
1.211 +
1.212 + if (fSrcA == 0) {
1.213 + return;
1.214 + }
1.215 +
1.216 + uint32_t* device = fDevice.getAddr32(x, y);
1.217 + uint32_t color = fPMColor;
1.218 + size_t rowBytes = fDevice.rowBytes();
1.219 +
1.220 + if (255 == SkGetPackedA32(color)) {
1.221 + fColorRect32Proc(device, width, height, rowBytes, color);
1.222 + } else {
1.223 + while (--height >= 0) {
1.224 + fColor32Proc(device, device, width, color);
1.225 + device = (uint32_t*)((char*)device + rowBytes);
1.226 + }
1.227 + }
1.228 +}
1.229 +
1.230 +#if defined _WIN32 && _MSC_VER >= 1300
1.231 +#pragma warning ( pop )
1.232 +#endif
1.233 +
1.234 +///////////////////////////////////////////////////////////////////////
1.235 +
1.236 +void SkARGB32_Black_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
1.237 + const int16_t runs[]) {
1.238 + uint32_t* device = fDevice.getAddr32(x, y);
1.239 + SkPMColor black = (SkPMColor)(SK_A32_MASK << SK_A32_SHIFT);
1.240 +
1.241 + for (;;) {
1.242 + int count = runs[0];
1.243 + SkASSERT(count >= 0);
1.244 + if (count <= 0) {
1.245 + return;
1.246 + }
1.247 + unsigned aa = antialias[0];
1.248 + if (aa) {
1.249 + if (aa == 255) {
1.250 + sk_memset32(device, black, count);
1.251 + } else {
1.252 + SkPMColor src = aa << SK_A32_SHIFT;
1.253 + unsigned dst_scale = 256 - aa;
1.254 + int n = count;
1.255 + do {
1.256 + --n;
1.257 + device[n] = src + SkAlphaMulQ(device[n], dst_scale);
1.258 + } while (n > 0);
1.259 + }
1.260 + }
1.261 + runs += count;
1.262 + antialias += count;
1.263 + device += count;
1.264 + }
1.265 +}
1.266 +
1.267 +///////////////////////////////////////////////////////////////////////////////
1.268 +
1.269 +// Special version of SkBlitRow::Factory32 that knows we're in kSrc_Mode,
1.270 +// instead of kSrcOver_Mode
1.271 +static void blend_srcmode(SkPMColor* SK_RESTRICT device,
1.272 + const SkPMColor* SK_RESTRICT span,
1.273 + int count, U8CPU aa) {
1.274 + int aa256 = SkAlpha255To256(aa);
1.275 + for (int i = 0; i < count; ++i) {
1.276 + device[i] = SkFourByteInterp256(span[i], device[i], aa256);
1.277 + }
1.278 +}
1.279 +
1.280 +SkARGB32_Shader_Blitter::SkARGB32_Shader_Blitter(const SkBitmap& device,
1.281 + const SkPaint& paint) : INHERITED(device, paint) {
1.282 + fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * (sizeof(SkPMColor)));
1.283 +
1.284 + fXfermode = paint.getXfermode();
1.285 + SkSafeRef(fXfermode);
1.286 +
1.287 + int flags = 0;
1.288 + if (!(fShader->getFlags() & SkShader::kOpaqueAlpha_Flag)) {
1.289 + flags |= SkBlitRow::kSrcPixelAlpha_Flag32;
1.290 + }
1.291 + // we call this on the output from the shader
1.292 + fProc32 = SkBlitRow::Factory32(flags);
1.293 + // we call this on the output from the shader + alpha from the aa buffer
1.294 + fProc32Blend = SkBlitRow::Factory32(flags | SkBlitRow::kGlobalAlpha_Flag32);
1.295 +
1.296 + fShadeDirectlyIntoDevice = false;
1.297 + if (fXfermode == NULL) {
1.298 + if (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag) {
1.299 + fShadeDirectlyIntoDevice = true;
1.300 + }
1.301 + } else {
1.302 + SkXfermode::Mode mode;
1.303 + if (fXfermode->asMode(&mode)) {
1.304 + if (SkXfermode::kSrc_Mode == mode) {
1.305 + fShadeDirectlyIntoDevice = true;
1.306 + fProc32Blend = blend_srcmode;
1.307 + }
1.308 + }
1.309 + }
1.310 +
1.311 + fConstInY = SkToBool(fShader->getFlags() & SkShader::kConstInY32_Flag);
1.312 +}
1.313 +
1.314 +SkARGB32_Shader_Blitter::~SkARGB32_Shader_Blitter() {
1.315 + SkSafeUnref(fXfermode);
1.316 + sk_free(fBuffer);
1.317 +}
1.318 +
1.319 +void SkARGB32_Shader_Blitter::blitH(int x, int y, int width) {
1.320 + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
1.321 +
1.322 + uint32_t* device = fDevice.getAddr32(x, y);
1.323 +
1.324 + if (fShadeDirectlyIntoDevice) {
1.325 + fShader->shadeSpan(x, y, device, width);
1.326 + } else {
1.327 + SkPMColor* span = fBuffer;
1.328 + fShader->shadeSpan(x, y, span, width);
1.329 + if (fXfermode) {
1.330 + fXfermode->xfer32(device, span, width, NULL);
1.331 + } else {
1.332 + fProc32(device, span, width, 255);
1.333 + }
1.334 + }
1.335 +}
1.336 +
1.337 +void SkARGB32_Shader_Blitter::blitRect(int x, int y, int width, int height) {
1.338 + SkASSERT(x >= 0 && y >= 0 &&
1.339 + x + width <= fDevice.width() && y + height <= fDevice.height());
1.340 +
1.341 + uint32_t* device = fDevice.getAddr32(x, y);
1.342 + size_t deviceRB = fDevice.rowBytes();
1.343 + SkShader* shader = fShader;
1.344 + SkPMColor* span = fBuffer;
1.345 +
1.346 + if (fConstInY) {
1.347 + if (fShadeDirectlyIntoDevice) {
1.348 + // shade the first row directly into the device
1.349 + fShader->shadeSpan(x, y, device, width);
1.350 + span = device;
1.351 + while (--height > 0) {
1.352 + device = (uint32_t*)((char*)device + deviceRB);
1.353 + memcpy(device, span, width << 2);
1.354 + }
1.355 + } else {
1.356 + fShader->shadeSpan(x, y, span, width);
1.357 + SkXfermode* xfer = fXfermode;
1.358 + if (xfer) {
1.359 + do {
1.360 + xfer->xfer32(device, span, width, NULL);
1.361 + y += 1;
1.362 + device = (uint32_t*)((char*)device + deviceRB);
1.363 + } while (--height > 0);
1.364 + } else {
1.365 + SkBlitRow::Proc32 proc = fProc32;
1.366 + do {
1.367 + proc(device, span, width, 255);
1.368 + y += 1;
1.369 + device = (uint32_t*)((char*)device + deviceRB);
1.370 + } while (--height > 0);
1.371 + }
1.372 + }
1.373 + return;
1.374 + }
1.375 +
1.376 + if (fShadeDirectlyIntoDevice) {
1.377 + void* ctx;
1.378 + SkShader::ShadeProc shadeProc = fShader->asAShadeProc(&ctx);
1.379 + if (shadeProc) {
1.380 + do {
1.381 + shadeProc(ctx, x, y, device, width);
1.382 + y += 1;
1.383 + device = (uint32_t*)((char*)device + deviceRB);
1.384 + } while (--height > 0);
1.385 + } else {
1.386 + do {
1.387 + shader->shadeSpan(x, y, device, width);
1.388 + y += 1;
1.389 + device = (uint32_t*)((char*)device + deviceRB);
1.390 + } while (--height > 0);
1.391 + }
1.392 + } else {
1.393 + SkXfermode* xfer = fXfermode;
1.394 + if (xfer) {
1.395 + do {
1.396 + shader->shadeSpan(x, y, span, width);
1.397 + xfer->xfer32(device, span, width, NULL);
1.398 + y += 1;
1.399 + device = (uint32_t*)((char*)device + deviceRB);
1.400 + } while (--height > 0);
1.401 + } else {
1.402 + SkBlitRow::Proc32 proc = fProc32;
1.403 + do {
1.404 + shader->shadeSpan(x, y, span, width);
1.405 + proc(device, span, width, 255);
1.406 + y += 1;
1.407 + device = (uint32_t*)((char*)device + deviceRB);
1.408 + } while (--height > 0);
1.409 + }
1.410 + }
1.411 +}
1.412 +
1.413 +void SkARGB32_Shader_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
1.414 + const int16_t runs[]) {
1.415 + SkPMColor* span = fBuffer;
1.416 + uint32_t* device = fDevice.getAddr32(x, y);
1.417 + SkShader* shader = fShader;
1.418 +
1.419 + if (fXfermode && !fShadeDirectlyIntoDevice) {
1.420 + for (;;) {
1.421 + SkXfermode* xfer = fXfermode;
1.422 +
1.423 + int count = *runs;
1.424 + if (count <= 0)
1.425 + break;
1.426 + int aa = *antialias;
1.427 + if (aa) {
1.428 + shader->shadeSpan(x, y, span, count);
1.429 + if (aa == 255) {
1.430 + xfer->xfer32(device, span, count, NULL);
1.431 + } else {
1.432 + // count is almost always 1
1.433 + for (int i = count - 1; i >= 0; --i) {
1.434 + xfer->xfer32(&device[i], &span[i], 1, antialias);
1.435 + }
1.436 + }
1.437 + }
1.438 + device += count;
1.439 + runs += count;
1.440 + antialias += count;
1.441 + x += count;
1.442 + }
1.443 + } else if (fShadeDirectlyIntoDevice ||
1.444 + (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag)) {
1.445 + for (;;) {
1.446 + int count = *runs;
1.447 + if (count <= 0) {
1.448 + break;
1.449 + }
1.450 + int aa = *antialias;
1.451 + if (aa) {
1.452 + if (aa == 255) {
1.453 + // cool, have the shader draw right into the device
1.454 + shader->shadeSpan(x, y, device, count);
1.455 + } else {
1.456 + shader->shadeSpan(x, y, span, count);
1.457 + fProc32Blend(device, span, count, aa);
1.458 + }
1.459 + }
1.460 + device += count;
1.461 + runs += count;
1.462 + antialias += count;
1.463 + x += count;
1.464 + }
1.465 + } else {
1.466 + for (;;) {
1.467 + int count = *runs;
1.468 + if (count <= 0) {
1.469 + break;
1.470 + }
1.471 + int aa = *antialias;
1.472 + if (aa) {
1.473 + fShader->shadeSpan(x, y, span, count);
1.474 + if (aa == 255) {
1.475 + fProc32(device, span, count, 255);
1.476 + } else {
1.477 + fProc32Blend(device, span, count, aa);
1.478 + }
1.479 + }
1.480 + device += count;
1.481 + runs += count;
1.482 + antialias += count;
1.483 + x += count;
1.484 + }
1.485 + }
1.486 +}
1.487 +
1.488 +void SkARGB32_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
1.489 + // we only handle kA8 with an xfermode
1.490 + if (fXfermode && (SkMask::kA8_Format != mask.fFormat)) {
1.491 + this->INHERITED::blitMask(mask, clip);
1.492 + return;
1.493 + }
1.494 +
1.495 + SkASSERT(mask.fBounds.contains(clip));
1.496 +
1.497 + SkBlitMask::RowProc proc = NULL;
1.498 + if (!fXfermode) {
1.499 + unsigned flags = 0;
1.500 + if (fShader->getFlags() & SkShader::kOpaqueAlpha_Flag) {
1.501 + flags |= SkBlitMask::kSrcIsOpaque_RowFlag;
1.502 + }
1.503 + proc = SkBlitMask::RowFactory(SkBitmap::kARGB_8888_Config, mask.fFormat,
1.504 + (SkBlitMask::RowFlags)flags);
1.505 + if (NULL == proc) {
1.506 + this->INHERITED::blitMask(mask, clip);
1.507 + return;
1.508 + }
1.509 + }
1.510 +
1.511 + const int x = clip.fLeft;
1.512 + const int width = clip.width();
1.513 + int y = clip.fTop;
1.514 + int height = clip.height();
1.515 +
1.516 + char* dstRow = (char*)fDevice.getAddr32(x, y);
1.517 + const size_t dstRB = fDevice.rowBytes();
1.518 + const uint8_t* maskRow = (const uint8_t*)mask.getAddr(x, y);
1.519 + const size_t maskRB = mask.fRowBytes;
1.520 +
1.521 + SkShader* shader = fShader;
1.522 + SkPMColor* span = fBuffer;
1.523 +
1.524 + if (fXfermode) {
1.525 + SkASSERT(SkMask::kA8_Format == mask.fFormat);
1.526 + SkXfermode* xfer = fXfermode;
1.527 + do {
1.528 + shader->shadeSpan(x, y, span, width);
1.529 + xfer->xfer32((SkPMColor*)dstRow, span, width, maskRow);
1.530 + dstRow += dstRB;
1.531 + maskRow += maskRB;
1.532 + y += 1;
1.533 + } while (--height > 0);
1.534 + } else {
1.535 + do {
1.536 + shader->shadeSpan(x, y, span, width);
1.537 + proc(dstRow, maskRow, span, width);
1.538 + dstRow += dstRB;
1.539 + maskRow += maskRB;
1.540 + y += 1;
1.541 + } while (--height > 0);
1.542 + }
1.543 +}
1.544 +
1.545 +void SkARGB32_Shader_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
1.546 + SkASSERT(x >= 0 && y >= 0 && y + height <= fDevice.height());
1.547 +
1.548 + uint32_t* device = fDevice.getAddr32(x, y);
1.549 + size_t deviceRB = fDevice.rowBytes();
1.550 + SkShader* shader = fShader;
1.551 +
1.552 + if (fConstInY) {
1.553 + SkPMColor c;
1.554 + fShader->shadeSpan(x, y, &c, 1);
1.555 +
1.556 + if (fShadeDirectlyIntoDevice) {
1.557 + if (255 == alpha) {
1.558 + do {
1.559 + *device = c;
1.560 + device = (uint32_t*)((char*)device + deviceRB);
1.561 + } while (--height > 0);
1.562 + } else {
1.563 + do {
1.564 + *device = SkFourByteInterp(c, *device, alpha);
1.565 + device = (uint32_t*)((char*)device + deviceRB);
1.566 + } while (--height > 0);
1.567 + }
1.568 + } else {
1.569 + SkXfermode* xfer = fXfermode;
1.570 + if (xfer) {
1.571 + do {
1.572 + xfer->xfer32(device, &c, 1, &alpha);
1.573 + device = (uint32_t*)((char*)device + deviceRB);
1.574 + } while (--height > 0);
1.575 + } else {
1.576 + SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend;
1.577 + do {
1.578 + proc(device, &c, 1, alpha);
1.579 + device = (uint32_t*)((char*)device + deviceRB);
1.580 + } while (--height > 0);
1.581 + }
1.582 + }
1.583 + return;
1.584 + }
1.585 +
1.586 + if (fShadeDirectlyIntoDevice) {
1.587 + void* ctx;
1.588 + SkShader::ShadeProc shadeProc = fShader->asAShadeProc(&ctx);
1.589 + if (255 == alpha) {
1.590 + if (shadeProc) {
1.591 + do {
1.592 + shadeProc(ctx, x, y, device, 1);
1.593 + y += 1;
1.594 + device = (uint32_t*)((char*)device + deviceRB);
1.595 + } while (--height > 0);
1.596 + } else {
1.597 + do {
1.598 + shader->shadeSpan(x, y, device, 1);
1.599 + y += 1;
1.600 + device = (uint32_t*)((char*)device + deviceRB);
1.601 + } while (--height > 0);
1.602 + }
1.603 + } else { // alpha < 255
1.604 + SkPMColor c;
1.605 + if (shadeProc) {
1.606 + do {
1.607 + shadeProc(ctx, x, y, &c, 1);
1.608 + *device = SkFourByteInterp(c, *device, alpha);
1.609 + y += 1;
1.610 + device = (uint32_t*)((char*)device + deviceRB);
1.611 + } while (--height > 0);
1.612 + } else {
1.613 + do {
1.614 + shader->shadeSpan(x, y, &c, 1);
1.615 + *device = SkFourByteInterp(c, *device, alpha);
1.616 + y += 1;
1.617 + device = (uint32_t*)((char*)device + deviceRB);
1.618 + } while (--height > 0);
1.619 + }
1.620 + }
1.621 + } else {
1.622 + SkPMColor* span = fBuffer;
1.623 + SkXfermode* xfer = fXfermode;
1.624 + if (xfer) {
1.625 + do {
1.626 + shader->shadeSpan(x, y, span, 1);
1.627 + xfer->xfer32(device, span, 1, &alpha);
1.628 + y += 1;
1.629 + device = (uint32_t*)((char*)device + deviceRB);
1.630 + } while (--height > 0);
1.631 + } else {
1.632 + SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend;
1.633 + do {
1.634 + shader->shadeSpan(x, y, span, 1);
1.635 + proc(device, span, 1, alpha);
1.636 + y += 1;
1.637 + device = (uint32_t*)((char*)device + deviceRB);
1.638 + } while (--height > 0);
1.639 + }
1.640 + }
1.641 +}
