1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2011 Google Inc. 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 7ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com */ 82ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com#include "SkMeshUtils.h" 92ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com#include "SkCanvas.h" 102ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com#include "SkPaint.h" 112ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 122ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.comSkMeshIndices::SkMeshIndices() { 132ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com sk_bzero(this, sizeof(*this)); 142ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com} 152ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 162ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.comSkMeshIndices::~SkMeshIndices() { 172ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com sk_free(fStorage); 182ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com} 192ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 202ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.combool SkMeshIndices::init(SkPoint tex[], uint16_t indices[], 212ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com int texW, int texH, int rows, int cols) { 222ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com if (rows < 2 || cols < 2) { 232ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com sk_free(fStorage); 242ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fStorage = NULL; 252ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fTex = NULL; 262ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fIndices = NULL; 272ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fTexCount = fIndexCount = 0; 282ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com return false; 292ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 302ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 312ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com sk_free(fStorage); 322ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fStorage = NULL; 332ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 342ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fTexCount = rows * cols; 352ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com rows -= 1; 362ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com cols -= 1; 372ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fIndexCount = rows * cols * 6; 382ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 392ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com if (tex) { 402ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fTex = tex; 412ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fIndices = indices; 422ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } else { 432ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fStorage = sk_malloc_throw(fTexCount * sizeof(SkPoint) + 442ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fIndexCount * sizeof(uint16_t)); 452ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fTex = (SkPoint*)fStorage; 462ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com fIndices = (uint16_t*)(fTex + fTexCount); 472ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 482ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 492ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com // compute the indices 502ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com { 512ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com uint16_t* idx = fIndices; 522ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com int index = 0; 532ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com for (int y = 0; y < cols; y++) { 542ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com for (int x = 0; x < rows; x++) { 552ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index; 562ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index + rows + 1; 572ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index + 1; 58d6176b0dcacb124539e0cfd051e6d93a9782f020rmistry@google.com 592ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index + 1; 602ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index + rows + 1; 612ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com *idx++ = index + rows + 2; 62d6176b0dcacb124539e0cfd051e6d93a9782f020rmistry@google.com 632ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com index += 1; 642ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 652ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com index += 1; 662ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 672ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 682ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 692ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com // compute texture coordinates 702ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com { 712ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com SkPoint* tex = fTex; 722ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com const SkScalar dx = SkIntToScalar(texW) / rows; 732ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com const SkScalar dy = SkIntToScalar(texH) / cols; 742ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com for (int y = 0; y <= cols; y++) { 752ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com for (int x = 0; x <= rows; x++) { 762ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com tex->set(x*dx, y*dy); 772ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com tex += 1; 782ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 792ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 802ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 812ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com return true; 822ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com} 832ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 842ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com/////////////////////////////////////////////////////////////////////////////// 852ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 862ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com#include "SkShader.h" 872ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com 882ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.comvoid SkMeshUtils::Draw(SkCanvas* canvas, const SkBitmap& bitmap, 892ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com int rows, int cols, const SkPoint verts[], 902ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com const SkColor colors[], const SkPaint& paint) { 912ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com SkMeshIndices idx; 92d6176b0dcacb124539e0cfd051e6d93a9782f020rmistry@google.com 932ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com if (idx.init(bitmap.width(), bitmap.height(), rows, cols)) { 942ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com SkPaint p(paint); 952ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com p.setShader(SkShader::CreateBitmapShader(bitmap, 962ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com SkShader::kClamp_TileMode, 972ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com SkShader::kClamp_TileMode))->unref(); 982ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 992ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com rows * cols, verts, idx.tex(), colors, NULL, 1002ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com idx.indices(), idx.indexCount(), p); 1012ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com } 1022ee7c640150a863f2859eb0aaf4dfe7ad7836f34reed@android.com} 103