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- /*
- * Copyright 2017 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkCanvas.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkVertices.h"
- #include "tests/Test.h"
- #include "tools/ToolUtils.h"
- static bool equal(const SkVertices* v0, const SkVertices* v1) {
- if (v0->mode() != v1->mode()) {
- return false;
- }
- if (v0->vertexCount() != v1->vertexCount()) {
- return false;
- }
- if (v0->indexCount() != v1->indexCount()) {
- return false;
- }
- if (!!v0->texCoords() != !!v1->texCoords()) {
- return false;
- }
- if (!!v0->colors() != !!v1->colors()) {
- return false;
- }
- for (int i = 0; i < v0->vertexCount(); ++i) {
- if (v0->positions()[i] != v1->positions()[i]) {
- return false;
- }
- if (v0->texCoords()) {
- if (v0->texCoords()[i] != v1->texCoords()[i]) {
- return false;
- }
- }
- if (v0->colors()) {
- if (v0->colors()[i] != v1->colors()[i]) {
- return false;
- }
- }
- }
- for (int i = 0; i < v0->indexCount(); ++i) {
- if (v0->indices()[i] != v1->indices()[i]) {
- return false;
- }
- }
- return true;
- }
- DEF_TEST(Vertices, reporter) {
- int vCount = 5;
- int iCount = 9; // odd value exercises padding logic in encode()
- const uint32_t texFlags[] = { 0, SkVertices::kHasTexCoords_BuilderFlag };
- const uint32_t colFlags[] = { 0, SkVertices::kHasColors_BuilderFlag };
- for (auto texF : texFlags) {
- for (auto colF : colFlags) {
- uint32_t flags = texF | colF;
- SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, vCount, iCount, flags);
- for (int i = 0; i < vCount; ++i) {
- float x = (float)i;
- builder.positions()[i].set(x, 1);
- if (builder.texCoords()) {
- builder.texCoords()[i].set(x, 2);
- }
- if (builder.colors()) {
- builder.colors()[i] = SkColorSetARGB(0xFF, i, 0x80, 0);
- }
- }
- for (int i = 0; i < builder.indexCount(); ++i) {
- builder.indices()[i] = i % vCount;
- }
- sk_sp<SkVertices> v0 = builder.detach();
- sk_sp<SkData> data = v0->encode();
- sk_sp<SkVertices> v1 = SkVertices::Decode(data->data(), data->size());
- REPORTER_ASSERT(reporter, v0->uniqueID() != 0);
- REPORTER_ASSERT(reporter, v1->uniqueID() != 0);
- REPORTER_ASSERT(reporter, v0->uniqueID() != v1->uniqueID());
- REPORTER_ASSERT(reporter, equal(v0.get(), v1.get()));
- }
- }
- {
- // This has the maximum number of vertices to be rewritten as indexed triangles without
- // overflowing a 16bit index.
- SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, UINT16_MAX + 1, 0,
- SkVertices::kHasColors_BuilderFlag);
- REPORTER_ASSERT(reporter, builder.isValid());
- }
- {
- // This has too many to be rewritten.
- SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, UINT16_MAX + 2, 0,
- SkVertices::kHasColors_BuilderFlag);
- REPORTER_ASSERT(reporter, !builder.isValid());
- }
- {
- // Only two vertices - can't be rewritten.
- SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, 2, 0,
- SkVertices::kHasColors_BuilderFlag);
- REPORTER_ASSERT(reporter, !builder.isValid());
- }
- {
- // Minimum number of indices to be rewritten.
- SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, 10, 3,
- SkVertices::kHasColors_BuilderFlag);
- REPORTER_ASSERT(reporter, builder.isValid());
- }
- {
- // Too few indices to be rewritten.
- SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, 10, 2,
- SkVertices::kHasColors_BuilderFlag);
- REPORTER_ASSERT(reporter, !builder.isValid());
- }
- }
- static void fill_triangle(SkCanvas* canvas, const SkPoint pts[], SkColor c) {
- SkColor colors[] = { c, c, c };
- auto verts = SkVertices::MakeCopy(SkVertices::kTriangles_VertexMode, 3, pts, nullptr, colors);
- canvas->drawVertices(verts, SkBlendMode::kSrc, SkPaint());
- }
- DEF_TEST(Vertices_clipping, reporter) {
- // A very large triangle has to be geometrically clipped (since its "fast" clipping is
- // normally done in after building SkFixed coordinates). Check that we handle this.
- // (and don't assert).
- auto surf = SkSurface::MakeRasterN32Premul(3, 3);
- SkPoint pts[] = { { -10, 1 }, { -10, 2 }, { 1e9f, 1.5f } };
- fill_triangle(surf->getCanvas(), pts, SK_ColorBLACK);
- ToolUtils::PixelIter iter(surf.get());
- SkIPoint loc;
- while (void* addr = iter.next(&loc)) {
- SkPMColor c = *(SkPMColor*)addr;
- if (loc.fY == 1) {
- REPORTER_ASSERT(reporter, c == 0xFF000000);
- } else {
- REPORTER_ASSERT(reporter, c == 0);
- }
- }
- }
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