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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 "SkCanvas.h"
#include "SkSurface.h"
#include "SkVertices.h"
#include "sk_pixel_iter.h"
#include "Test.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, SK_MaxU16 + 1, 0,
SkVertices::kHasColors_BuilderFlag);
REPORTER_ASSERT(reporter, builder.isValid());
}
{
// This has too many to be rewritten.
SkVertices::Builder builder(SkVertices::kTriangleFan_VertexMode, SK_MaxU16 + 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);
sk_tool_utils::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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