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[core] improve legibility of labels that follow lines

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port https://github.com/mapbox/mapbox-gl-js/pull/4781

This improves legibility of labels that follow lines in pitched views.
The previous approach used the limited information in the shader to
calculate put the glyph in approximatelyright place. The new approach
does this more accurately by doing it on the cpu where we have access to
the entire line geometry.
This commit is contained in:
Ansis Brammanis
2017-06-16 10:42:33 -04:00
parent 77734cfe1b
commit e514138b69
32 changed files with 726 additions and 740 deletions
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4
test/programs/symbol_program.test.cpp
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@@ -10,7 +10,6 @@ TEST(SymbolProgram, SymbolSizeBinder) {
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_zoom_constant>().t, true);
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_feature_constant>().t, true);
EXPECT_EQ(uniformValues.get<uniforms::u_size>().t, 12.0f);
EXPECT_EQ(uniformValues.get<uniforms::u_layout_size>().t, 12.0f);
binder = SymbolSizeBinder::create(1.0f, style::CameraFunction<float>(style::ExponentialStops<float>({
{0.0f, 8.0f},
@@ -20,7 +19,6 @@ TEST(SymbolProgram, SymbolSizeBinder) {
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_zoom_constant>().t, false);
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_feature_constant>().t, true);
EXPECT_EQ(uniformValues.get<uniforms::u_size>().t, 9.5f);
EXPECT_EQ(uniformValues.get<uniforms::u_layout_size>().t, 10.0f);
binder = SymbolSizeBinder::create(0.0f, style::CameraFunction<float>(style::ExponentialStops<float>({
{1.0f, 8.0f},
@@ -30,7 +28,6 @@ TEST(SymbolProgram, SymbolSizeBinder) {
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_zoom_constant>().t, false);
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_feature_constant>().t, true);
EXPECT_EQ(uniformValues.get<uniforms::u_size>().t, 8.0f);
EXPECT_EQ(uniformValues.get<uniforms::u_layout_size>().t, 8.0f);
binder = SymbolSizeBinder::create(12.0f, style::CameraFunction<float>(style::ExponentialStops<float>({
{1.0f, 8.0f},
@@ -40,7 +37,6 @@ TEST(SymbolProgram, SymbolSizeBinder) {
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_zoom_constant>().t, false);
EXPECT_EQ(uniformValues.get<uniforms::u_is_size_feature_constant>().t, true);
EXPECT_EQ(uniformValues.get<uniforms::u_size>().t, 18.0f);
EXPECT_EQ(uniformValues.get<uniforms::u_layout_size>().t, 18.0f);
binder = SymbolSizeBinder::create(0.0f, style::SourceFunction<float>("x", style::ExponentialStops<float>({
{1.0f, 8.0f},