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image unit test - add copy (deep/shallow) + move tests

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This commit is contained in:
artemp 2015-09-16 11:37:46 +01:00
parent d7d3da6935
commit c1301fa142
1 changed files with 73 additions and 13 deletions
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86
test/unit/imaging/image.cpp
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@ -10,7 +10,7 @@
TEST_CASE("image class") {
SECTION("test gray16") {
const mapnik::image_gray16 im(4,4);
mapnik::image_gray16 im2(im);
mapnik::image_gray16 im3(5,5);
@ -20,11 +20,11 @@ SECTION("test gray16") {
CHECK_FALSE(im2 == im3);
CHECK(im < im3);
CHECK_FALSE(im < im2);
// Check that width is correct
CHECK(im.width() == 4);
CHECK(im2.width() == 4);
// Check that height is correct
CHECK(im.height() == 4);
CHECK(im2.height() == 4);
@ -40,11 +40,11 @@ SECTION("test gray16") {
// Check that size is correct
CHECK(im.size() == 32);
CHECK(im2.size() == 32);
// Check that row_size is correct
CHECK(im.row_size() == 8);
CHECK(im2.row_size() == 8);
// Check that get_premultiplied is correct
CHECK_FALSE(im.get_premultiplied());
CHECK_FALSE(im2.get_premultiplied());
@ -52,7 +52,7 @@ SECTION("test gray16") {
// Check that set premultiplied works
im2.set_premultiplied(true);
CHECK(im2.get_premultiplied());
// Check that painted is correct
CHECK_FALSE(im.painted());
CHECK_FALSE(im2.painted());
@ -64,15 +64,15 @@ SECTION("test gray16") {
// Check that offset is correct
CHECK(im.get_offset() == 0.0);
CHECK(im2.get_offset() == 0.0);
// Check that set offset works
im2.set_offset(2.3);
CHECK(im2.get_offset() == 2.3);
// Check that scaling is correct
CHECK(im.get_scaling() == 1.0);
CHECK(im2.get_scaling() == 1.0);
// Check that set scaling works
im2.set_scaling(1.1);
CHECK(im2.get_scaling() == 1.1);
@ -140,7 +140,7 @@ SECTION("test gray16") {
CHECK(im2(0,0) == 30);
CHECK(im2(0,1) == 514);
CHECK(im2(1,1) == 50);
} // END SECTION
SECTION("image_null")
@ -149,11 +149,11 @@ SECTION("image_null")
const mapnik::image_null im_null2(2,2); // Actually doesn't really set any size
mapnik::image_null im_null3(im_null2);
mapnik::image_null im_null4(std::move(im_null3));
// All nulls are equal
CHECK(im_null == im_null4);
CHECK(im_null == im_null2);
// No null is greater
CHECK_FALSE(im_null < im_null4);
CHECK_FALSE(im_null < im_null2);
@ -289,5 +289,65 @@ SECTION("Image Buffer")
} // END SECTION
} // END TEST CASE
SECTION("Image copy/move")
{
mapnik::detail::buffer buf(256 * 256 * 4); // large enough to hold 256*256 RGBA image
CHECK(buf.size() == 256 * 256 * 4);
mapnik::image_rgba8 im(256, 256, buf.data()); // shallow copy
// fill buffer with 0xff
std::fill(buf.data(), buf.data() + buf.size(), 0xff);
std::size_t count = 0;
for (auto const& pixel : im)
{
// expect rgba(255,255,255,1.0)
CHECK( sizeof(pixel) == sizeof(mapnik::image_rgba8::pixel_type));
CHECK( pixel == 0xffffffff);
++count;
}
CHECK( count == im.width() * im.height());
// mutate buffer
// fill buffer with 0x7f - semi-transparent grey
std::fill(buf.data(), buf.data() + buf.size(), 0x7f);
for (auto const& pixel : im)
{
// expect rgba(127,127,127,0.5)
CHECK( pixel == 0x7f7f7f7f);
}
// mutate image directly (mutates buf)
for (auto & pixel : im)
{
pixel = mapnik::color(0,255,0).rgba(); // green
}
// move
mapnik::image_rgba8 im2(std::move(im));
for (auto const& pixel : im2)
{
// expect `green`
CHECK( pixel == mapnik::color(0,255,0).rgba());
}
// deep copy
mapnik::image_rgba8 im3(im2); // allocates new internal buffer
for (auto & pixel : im3)
{
// expect `green`
CHECK( pixel == mapnik::color(0,255,0).rgba());
// mutate
pixel = mapnik::color(255,0,0).rgba(); //red
}
// original buffer (holds green pixels)
unsigned char* itr = buf.data();
unsigned char* end = itr + buf.size();
count = 0;
for ( ;itr!= end; ++itr)
{
CHECK( *itr == ((count % 2 == 0) ? 0 : 0xff)); // green
++count;
}
}
} // END TEST CASE