Simplify GrSWMaskHelper

src/gpu/GrSWMaskHelper.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSWMaskHelper.h"
 
 #include "GrCaps.h"
 #include "GrDrawTarget.h"
 #include "GrGpu.h"
 #include "GrPipelineBuilder.h"
 #include "GrStyle.h"
 
 #include "SkData.h"
 #include "SkDistanceFieldGen.h"
 #include "SkStrokeRec.h"
 
 #include "batches/GrRectBatchFactory.h"
 
-namespace {
-
 /*
  * Convert a boolean operation into a transfer mode code
  */
-SkXfermode::Mode op_to_mode(SkRegion::Op op) {
+static SkXfermode::Mode op_to_mode(SkRegion::Op op) {
 
     static const SkXfermode::Mode modeMap[] = {
         SkXfermode::kDstOut_Mode,   // kDifference_Op
         SkXfermode::kModulate_Mode, // kIntersect_Op
         SkXfermode::kSrcOver_Mode,  // kUnion_Op
         SkXfermode::kXor_Mode,      // kXOR_Op
         SkXfermode::kClear_Mode,    // kReverseDifference_Op
         SkXfermode::kSrc_Mode,      // kReplace_Op
     };
 
     return modeMap[op];
 }
 
-static inline GrPixelConfig fmt_to_config(SkTextureCompressor::Format fmt) {
-
-    GrPixelConfig config;
-    switch (fmt) {
-        case SkTextureCompressor::kLATC_Format:
-            config = kLATC_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kR11_EAC_Format:
-            config = kR11_EAC_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kASTC_12x12_Format:
-            config = kASTC_12x12_GrPixelConfig;
-            break;
-
-        case SkTextureCompressor::kETC1_Format:
-            config = kETC1_GrPixelConfig;
-            break;
-
-        default:
-            SkDEBUGFAIL("No GrPixelConfig for compression format!");
-            // Best guess
-            config = kAlpha_8_GrPixelConfig;
-            break;
-    }
-
-    return config;
-}
-
-static bool choose_compressed_fmt(const GrCaps* caps,
-                                  SkTextureCompressor::Format *fmt) {
-    if (nullptr == fmt) {
-        return false;
-    }
-
-    // We can't use scratch textures without the ability to update
-    // compressed textures...
-    if (!(caps->compressedTexSubImageSupport())) {
-        return false;
-    }
-
-    // Figure out what our preferred texture type is. If ASTC is available, that always
-    // gives the biggest win. Otherwise, in terms of compression speed and accuracy,
-    // LATC has a slight edge over R11 EAC.
-    if (caps->isConfigTexturable(kASTC_12x12_GrPixelConfig)) {
-        *fmt = SkTextureCompressor::kASTC_12x12_Format;
-        return true;
-    } else if (caps->isConfigTexturable(kLATC_GrPixelConfig)) {
-        *fmt = SkTextureCompressor::kLATC_Format;
-        return true;
-    } else if (caps->isConfigTexturable(kR11_EAC_GrPixelConfig)) {
-        *fmt = SkTextureCompressor::kR11_EAC_Format;
-        return true;
-    }
-
-    return false;
-}
-
-}
-
 /**
  * Draw a single rect element of the clip stack into the accumulation bitmap
  */
-void GrSWMaskHelper::draw(const SkRect& rect, SkRegion::Op op,
-                          bool antiAlias, uint8_t alpha) {
+void GrSWMaskHelper::drawRect(const SkRect& rect, SkRegion::Op op,
+                              bool antiAlias, uint8_t alpha) {
     SkPaint paint;
 
-    SkASSERT(kNone_CompressionMode == fCompressionMode);
-
     paint.setXfermode(SkXfermode::Make(op_to_mode(op)));
     paint.setAntiAlias(antiAlias);
     paint.setColor(SkColorSetARGB(alpha, alpha, alpha, alpha));
 
     fDraw.drawRect(rect, paint);
 }
 
 /**
  * Draw a single path element of the clip stack into the accumulation bitmap
  */
-void GrSWMaskHelper::draw(const SkPath& path, const GrStyle& style, SkRegion::Op op,
-                          bool antiAlias, uint8_t alpha) {
+void GrSWMaskHelper::drawPath(const SkPath& path, const GrStyle& style, SkRegion::Op op,
+                              bool antiAlias, uint8_t alpha) {
     SkPaint paint;
     paint.setPathEffect(sk_ref_sp(style.pathEffect()));
     style.strokeRec().applyToPaint(&paint);
     paint.setAntiAlias(antiAlias);
 
-    SkTBlitterAllocator allocator;
-    SkBlitter* blitter = nullptr;
-    if (kBlitter_CompressionMode == fCompressionMode) {
-        SkASSERT(fCompressedBuffer.get());
-        blitter = SkTextureCompressor::CreateBlitterForFormat(
-            fPixels.width(), fPixels.height(), fCompressedBuffer.get(), &allocator,
-                                                              fCompressedFormat);
-    }
-
     if (SkRegion::kReplace_Op == op && 0xFF == alpha) {
         SkASSERT(0xFF == paint.getAlpha());
-        fDraw.drawPathCoverage(path, paint, blitter);
+        fDraw.drawPathCoverage(path, paint);
     } else {
         paint.setXfermodeMode(op_to_mode(op));
         paint.setColor(SkColorSetARGB(alpha, alpha, alpha, alpha));
-        fDraw.drawPath(path, paint, blitter);
+        fDraw.drawPath(path, paint);
     }
 }
 
-bool GrSWMaskHelper::init(const SkIRect& resultBounds,
-                          const SkMatrix* matrix,
-                          bool allowCompression) {
+bool GrSWMaskHelper::init(const SkIRect& resultBounds, const SkMatrix* matrix) {
     if (matrix) {
         fMatrix = *matrix;
     } else {
         fMatrix.setIdentity();
     }
 
     // Now translate so the bound's UL corner is at the origin
-    fMatrix.postTranslate(-resultBounds.fLeft * SK_Scalar1,
-                          -resultBounds.fTop * SK_Scalar1);
-    SkIRect bounds = SkIRect::MakeWH(resultBounds.width(),
-                                     resultBounds.height());
+    fMatrix.postTranslate(-SkIntToScalar(resultBounds.fLeft), -SkIntToScalar(resultBounds.fTop));
+    SkIRect bounds = SkIRect::MakeWH(resultBounds.width(), resultBounds.height());
 
-    if (allowCompression &&
-        fContext->caps()->drawPathMasksToCompressedTexturesSupport() &&
-        choose_compressed_fmt(fContext->caps(), &fCompressedFormat)) {
-        fCompressionMode = kCompress_CompressionMode;
+    const SkImageInfo bmImageInfo = SkImageInfo::MakeA8(bounds.width(), bounds.height());
+    if (!fPixels.tryAlloc(bmImageInfo)) {
+        return false;
     }
-
-    // Make sure that the width is a multiple of the desired block dimensions
-    // to allow for specialized SIMD instructions that compress multiple blocks at a time.
-    int cmpWidth = bounds.fRight;
-    int cmpHeight = bounds.fBottom;
-    if (kCompress_CompressionMode == fCompressionMode) {
-        int dimX, dimY;
-        SkTextureCompressor::GetBlockDimensions(fCompressedFormat, &dimX, &dimY);
-        cmpWidth = dimX * ((cmpWidth + (dimX - 1)) / dimX);
-        cmpHeight = dimY * ((cmpHeight + (dimY - 1)) / dimY);
-
-        // Can we create a blitter?
-        if (SkTextureCompressor::ExistsBlitterForFormat(fCompressedFormat)) {
-            int cmpSz = SkTextureCompressor::GetCompressedDataSize(
-                fCompressedFormat, cmpWidth, cmpHeight);
-
-            SkASSERT(cmpSz > 0);
-            SkASSERT(nullptr == fCompressedBuffer.get());
-            fCompressedBuffer.reset(cmpSz);
-            fCompressionMode = kBlitter_CompressionMode;
-        }
-    }
+    fPixels.erase(0);
 
     sk_bzero(&fDraw, sizeof(fDraw));
-
-    // If we don't have a custom blitter, then we either need a bitmap to compress
-    // from or a bitmap that we're going to use as a texture. In any case, we should
-    // allocate the pixels for a bitmap
-    const SkImageInfo bmImageInfo = SkImageInfo::MakeA8(cmpWidth, cmpHeight);
-    if (kBlitter_CompressionMode != fCompressionMode) {
-        if (!fPixels.tryAlloc(bmImageInfo)) {
-            return false;
-        }
-        fPixels.erase(0);
-    } else {
-        // Otherwise, we just need to remember how big the buffer is...
-        fPixels.reset(bmImageInfo);
-    }
     fDraw.fDst      = fPixels;
     fRasterClip.setRect(bounds);
     fDraw.fRC       = &fRasterClip;
     fDraw.fMatrix   = &fMatrix;
     return true;
 }
 
 /**
  * Get a texture (from the texture cache) of the correct size & format.
  */
 GrTexture* GrSWMaskHelper::createTexture() {
     GrSurfaceDesc desc;
     desc.fWidth = fPixels.width();
     desc.fHeight = fPixels.height();
     desc.fConfig = kAlpha_8_GrPixelConfig;
 
-    if (kNone_CompressionMode != fCompressionMode) {
-
-#ifdef SK_DEBUG
-        int dimX, dimY;
-        SkTextureCompressor::GetBlockDimensions(fCompressedFormat, &dimX, &dimY);
-        SkASSERT((desc.fWidth % dimX) == 0);
-        SkASSERT((desc.fHeight % dimY) == 0);
-#endif
-
-        desc.fConfig = fmt_to_config(fCompressedFormat);
-        SkASSERT(fContext->caps()->isConfigTexturable(desc.fConfig));
-    }
-
     return fContext->textureProvider()->createApproxTexture(desc);
 }
 
-void GrSWMaskHelper::sendTextureData(GrTexture *texture, const GrSurfaceDesc& desc,
-                                     const void *data, size_t rowbytes) {
-    // Since we're uploading to it, and it's compressed, 'texture' shouldn't
-    // have a render target.
-    SkASSERT(nullptr == texture->asRenderTarget());
-
-    texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig, data, rowbytes);
-}
-
-void GrSWMaskHelper::compressTextureData(GrTexture *texture, const GrSurfaceDesc& desc) {
-
-    SkASSERT(GrPixelConfigIsCompressed(desc.fConfig));
-    SkASSERT(fmt_to_config(fCompressedFormat) == desc.fConfig);
-
-    SkAutoDataUnref cmpData(SkTextureCompressor::CompressBitmapToFormat(fPixels,
-                                                                        fCompressedFormat));
-    SkASSERT(cmpData);
-
-    this->sendTextureData(texture, desc, cmpData->data(), 0);
-}
-
 /**
  * Move the result of the software mask generation back to the gpu
  */
 void GrSWMaskHelper::toTexture(GrTexture *texture) {
-    GrSurfaceDesc desc;
-    desc.fWidth = fPixels.width();
-    desc.fHeight = fPixels.height();
-    desc.fConfig = texture->config();
+    // Since we're uploading to it, and it's compressed, 'texture' shouldn't
+    // have a render target.
+    SkASSERT(!texture->asRenderTarget());
 
-    // First see if we should compress this texture before uploading.
-    switch (fCompressionMode) {
-        case kNone_CompressionMode:
-            this->sendTextureData(texture, desc, fPixels.addr(), fPixels.rowBytes());
-            break;
+    texture->writePixels(0, 0, fPixels.width(), fPixels.height(), texture->config(),
+                         fPixels.addr(), fPixels.rowBytes());
 
-        case kCompress_CompressionMode:
-            this->compressTextureData(texture, desc);
-            break;
-
-        case kBlitter_CompressionMode:
-            SkASSERT(fCompressedBuffer.get());
-            this->sendTextureData(texture, desc, fCompressedBuffer.get(), 0);
-            break;
-    }
 }
 
 /**
  * Convert mask generation results to a signed distance field
  */
 void GrSWMaskHelper::toSDF(unsigned char* sdf) {
     SkGenerateDistanceFieldFromA8Image(sdf, (const unsigned char*)fPixels.addr(),
                                        fPixels.width(), fPixels.height(), fPixels.rowBytes());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 /**
  * Software rasterizes path to A8 mask (possibly using the context's matrix)
  * and uploads the result to a scratch texture. Returns the resulting
  * texture on success; nullptr on failure.
  */
 GrTexture* GrSWMaskHelper::DrawPathMaskToTexture(GrContext* context,
                                                  const SkPath& path,
                                                  const GrStyle& style,
                                                  const SkIRect& resultBounds,
                                                  bool antiAlias,
                                                  const SkMatrix* matrix) {
     GrSWMaskHelper helper(context);
 
     if (!helper.init(resultBounds, matrix)) {
         return nullptr;
     }
 
-    helper.draw(path, style, SkRegion::kReplace_Op, antiAlias, 0xFF);
+    helper.drawPath(path, style, SkRegion::kReplace_Op, antiAlias, 0xFF);
 
     GrTexture* texture(helper.createTexture());
     if (!texture) {
         return nullptr;
     }
 
     helper.toTexture(texture);
 
     return texture;
 }
@@ skipping 25 matching lines @@
     pipelineBuilder->addCoverageFragmentProcessor(
                          GrSimpleTextureEffect::Create(texture,
                                                        maskMatrix,
                                                        GrTextureParams::kNone_FilterMode,
                                                        kDevice_GrCoordSet))->unref();
 
     SkAutoTUnref<GrDrawBatch> batch(GrRectBatchFactory::CreateNonAAFill(color, SkMatrix::I(),
                                                                         dstRect, nullptr, &invert));
     target->drawBatch(*pipelineBuilder, batch);
 }