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#include <mbgl/test/util.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/tileset.hpp>
#include <mbgl/geometry/dem_data.hpp>
using namespace mbgl;
auto fakeImage = [](Size s) {
PremultipliedImage img = PremultipliedImage(s);
for (size_t i = 0; i < img.bytes(); i ++) {
img.data[i] = (i+1) % 4 == 0 ? 1 : std::rand() % 255;
}
return img;
};
TEST(DEMData, Constructor) {
PremultipliedImage image = fakeImage({16, 16});
DEMData demdata(image, Tileset::DEMEncoding::Mapbox);
EXPECT_EQ(demdata.dim, 16);
EXPECT_EQ(demdata.border, 8);
EXPECT_EQ(demdata.stride, 32);
EXPECT_EQ(demdata.getImage()->bytes(), size_t(32*32*4));
EXPECT_EQ(demdata.dim, 16);
EXPECT_EQ(demdata.border, 8);
};
TEST(DEMData, RoundTrip) {
PremultipliedImage image = fakeImage({16, 16});
DEMData demdata(image, Tileset::DEMEncoding::Mapbox);
demdata.set(4, 6, 255);
EXPECT_EQ(demdata.get(4, 6), 255);
}
TEST(DEMData, InitialBackfill) {
PremultipliedImage image1 = fakeImage({4, 4});
DEMData dem1(image1, Tileset::DEMEncoding::Mapbox);
bool nonempty = true;
// checking that a 1 px border around the fake image has been populated
// with a non-empty pixel value
for (int x = -1; x < 5; x++){
for (int y = -1; y < 5; y ++) {
if (dem1.get(x, y) == -65536) {
nonempty = false;
break;
}
}
}
EXPECT_TRUE(nonempty);
bool verticalBorderMatch = true;
int vertx[] = {-1, 4};
for (int x : vertx) {
for (int y = 0; y < 4; y++) {
if (dem1.get(x, y) != dem1.get(x < 0 ? x + 1 : x - 1, y)) {
verticalBorderMatch = false;
break;
}
}
}
// vertical border of DEM data is initially equal to next column of data
EXPECT_TRUE(verticalBorderMatch);
// horizontal borders empty
bool horizontalBorderMatch = true;
int horiz[] = {-1, 4};
for (int y : horiz) {
for (int x = 0; x < 4; x++) {
if (dem1.get(x, y) != dem1.get(x, y < 0 ? y + 1 : y - 1)) {
horizontalBorderMatch = false;
break;
}
}
}
//horizontal border of DEM data is initially equal to next row of data
EXPECT_TRUE(horizontalBorderMatch);
// -1, 1 corner initially equal to closest corner data
EXPECT_TRUE(dem1.get(-1, 4) == dem1.get(0, 3));
// 1, 1 corner initially equal to closest corner data
EXPECT_TRUE(dem1.get(4, 4) == dem1.get(3, 3));
// -1, -1 corner initially equal to closest corner data
EXPECT_TRUE(dem1.get(-1, -1) == dem1.get(0, 0));
// -1, 1 corner initially equal to closest corner data
EXPECT_TRUE(dem1.get(4, -1) == dem1.get(3, 0));
};
TEST(DEMData, BackfillNeighbor) {
PremultipliedImage image1 = fakeImage({4, 4});
DEMData dem0(image1, Tileset::DEMEncoding::Mapbox);
PremultipliedImage image2 = fakeImage({4, 4});
DEMData dem1(image2, Tileset::DEMEncoding::Mapbox);
dem0.backfillBorder(dem1, -1, 0);
for (int y = 0; y < 4; y++) {
// dx = -1, dy = 0, so the left edge of dem1 should equal the right edge of dem0
// backfills Left neighbor
EXPECT_TRUE(dem0.get(-1, y) == dem1.get(3, y));
}
dem0.backfillBorder(dem1, 0, -1);
// backfills TopCenter neighbor
for (int x = 0; x < 4; x++) {
EXPECT_TRUE(dem0.get(x, -1) == dem1.get(x, 3));
}
dem0.backfillBorder(dem1, 1, 0);
// backfills Right neighbor
for (int y = 0; y < 4; y++) {
EXPECT_TRUE(dem0.get(4, y) == dem1.get(0, y));
}
dem0.backfillBorder(dem1, 0, 1);
// backfills BottomCenter neighbor
for (int x = 0; x < 4; x++) {
EXPECT_TRUE(dem0.get(x, 4) == dem1.get(x, 0));
}
dem0.backfillBorder(dem1, -1, 1);
// backfulls TopRight neighbor
EXPECT_TRUE(dem0.get(-1, 4) == dem1.get(3, 0));
dem0.backfillBorder(dem1, 1, 1);
// backfulls BottomRight neighbor
EXPECT_TRUE(dem0.get(4, 4) == dem1.get(0, 0));
dem0.backfillBorder(dem1, -1, -1);
// backfulls TopLeft neighbor
EXPECT_TRUE(dem0.get(-1, -1) == dem1.get(3, 3));
dem0.backfillBorder(dem1, 1, -1);
// backfulls BottomLeft neighbor
EXPECT_TRUE(dem0.get(4, -1) == dem1.get(0, 3));
};
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