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Text: rework Renderer tests. 

It was all just way too random and completely detached from real-world
cases. In particular, the mesh rectangle and the texture rectangle were
completely different, which just cannot happen, and was completely
disregarding presence of a glyph cache, making it impossible to adapt to
the upcoming AbstractLayouter / AbstractShaper rework.

It now also explicitly verifies behavior of various Alignment values
instead of just testing them at random, and there's also a new TODO
related to those.
pull/168/head
Vladimír Vondruš 3 years ago
parent
43efac8ed3
commit
00e58284e1
1 changed files with 290 additions and 175 deletions
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  1. 465
      src/Magnum/Text/Test/RendererGLTest.cpp

465
src/Magnum/Text/Test/RendererGLTest.cpp
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@ -32,6 +32,7 @@
#include "Magnum/GL/Extensions.h"
#include "Magnum/GL/OpenGLTester.h"
#include "Magnum/Text/AbstractFont.h"
#include "Magnum/Text/GlyphCache.h"
#include "Magnum/Text/Renderer.h"
namespace Magnum { namespace Text { namespace Test { namespace {
@ -47,117 +48,193 @@ struct RendererGLTest: GL::OpenGLTester {
void multiline();
};
const struct {
const char* name;
Alignment alignment;
Vector2 offset;
} RenderDataData[]{
/* Not testing all combinations, just making sure that each horizontal,
vertical and integer variant is covered */
{"line left", Alignment::LineLeft,
{}},
/** @todo for all these, the initial glyph offset is first subtracted and
only then the shift by either half or full size is performed, does that
make sense? why is not done for the LineLeft case, then? */
{"top left", Alignment::TopLeft,
{0.0f, -7.0f - 3.5f}},
{"top right", Alignment::TopRight,
{-10.0f - 2.5f, -7.0f - 3.5f}},
{"middle center", Alignment::MiddleCenter,
/* Half size of the bounds quad */
{-5.0f - 2.5f, -3.5f - 3.625f}},
{"middle center, integral", Alignment::MiddleCenterIntegral,
/* The X shift is rounded to whole units */
{-5.5f - 2.5f, -3.5f - 3.5f}},
};
RendererGLTest::RendererGLTest() {
addTests({&RendererGLTest::renderData,
&RendererGLTest::renderMesh,
addInstancedTests({&RendererGLTest::renderData},
Containers::arraySize(RenderDataData));
addTests({&RendererGLTest::renderMesh,
&RendererGLTest::renderMeshIndexType,
&RendererGLTest::mutableText,
&RendererGLTest::multiline});
}
class TestLayouter: public AbstractLayouter {
public:
explicit TestLayouter(Float size, std::size_t glyphCount): AbstractLayouter(glyphCount), _size(size) {}
private:
Containers::Triple<Range2D, Range2D, Vector2> doRenderGlyph(UnsignedInt i) override {
return {{{}, Vector2(3.0f, 2.0f)*((i+1)*_size)},
Range2D::fromSize({i*6.0f, 0.0f}, {6.0f, 10.0f}),
(Vector2::xAxis((i+1)*3.0f)+Vector2(1.0f, -1.0f))*_size};
}
struct TestLayouter: AbstractLayouter {
explicit TestLayouter(const AbstractGlyphCache& cache, UnsignedInt fontId, Float scale, UnsignedInt glyphCount): AbstractLayouter{glyphCount}, _cache(cache), _fontId{fontId}, _scale{scale} {}
Containers::Triple<Range2D, Range2D, Vector2> doRenderGlyph(UnsignedInt i) override {
/* It just rotates between the three glyphs */
UnsignedInt glyphId;
if(i % 3 == 0)
glyphId = 3;
else if(i % 3 == 1)
glyphId = 7;
else
glyphId = 9;
Containers::Triple<Vector2i, Int, Range2Di> glyph = _cache.glyph(_fontId, glyphId);
CORRADE_VERIFY(glyph.second() == 0);
/* Offset Y and advance X is getting larger with every glyph */
return {
Range2D::fromSize(Vector2{glyph.first() + Vector2i::yAxis(i + 1)}*_scale, Vector2{glyph.third().size()}*_scale),
Range2D{glyph.third()}.scaled(1.0f/Vector2{_cache.size().xy()}),
Vector2{Float(i + 1), i % 2 ? -0.5f : +0.5f}*_scale
};
}
Float _size;
const AbstractGlyphCache& _cache;
UnsignedInt _fontId;
Float _scale;
};
class TestFont: public AbstractFont {
FontFeatures doFeatures() const override { return FontFeature::OpenData; }
struct TestFont: AbstractFont {
FontFeatures doFeatures() const override { return {}; }
bool doIsOpened() const override { return _opened; }
void doClose() override { _opened = false; }
bool doIsOpened() const override { return true; }
void doClose() override {}
Properties doOpenFile(Containers::StringView, Float size) override {
_opened = true;
return {size, 0.45f, -0.25f, 0.75f, 10};
}
UnsignedInt doGlyphId(char32_t) override { return 0; }
Vector2 doGlyphSize(UnsignedInt) override { return {}; }
Vector2 doGlyphAdvance(UnsignedInt) override { return {}; }
Containers::Pointer<AbstractLayouter> doLayout(const AbstractGlyphCache&, Float size, Containers::StringView text) override {
return Containers::pointer<TestLayouter>(size, text.size());
Containers::Pointer<AbstractLayouter> doLayout(const AbstractGlyphCache& cache, Float size, Containers::StringView text) override {
/* The final rendered size should be a ratio of the font and layout
size */
return Containers::pointer<TestLayouter>(cache, *cache.findFont(this), size/this->size(), UnsignedInt(text.size()));
}
bool _opened = false;
};
/* *static_cast<GlyphCache*>(nullptr) makes Clang Analyzer grumpy */
char glyphCacheData;
GlyphCache& nullGlyphCache = *reinterpret_cast<GlyphCache*>(&glyphCacheData);
GlyphCache testGlyphCache(AbstractFont& font) {
GlyphCache cache{{20, 20}};
/* Add one more font to verify the right one gets picked */
cache.addFont(96);
UnsignedInt fontId = cache.addFont(font.glyphCount(), &font);
/* Three glyphs, covering bottom, top left and top right of the cache */
cache.addGlyph(fontId, 3, {5, 10}, {{}, {20, 10}});
cache.addGlyph(fontId, 7, {10, 5}, {{0, 10}, {10, 20}});
cache.addGlyph(fontId, 9, {5, 5}, {{10, 10}, {20, 20}});
return cache;
}
void RendererGLTest::renderData() {
auto&& data = RenderDataData[testCaseInstanceId()];
setTestCaseDescription(data.name);
TestFont font;
font.openFile({}, 0.5f);
GlyphCache cache = testGlyphCache(font);
/* Capture the correct function name */
CORRADE_VERIFY(true);
std::vector<Vector2> positions;
std::vector<Vector2> textureCoordinates;
std::vector<UnsignedInt> indices;
Range2D bounds;
std::tie(positions, textureCoordinates, indices, bounds) = AbstractRenderer::render(font, nullGlyphCache, 0.25f, "abc", Alignment::MiddleRightIntegral);
std::tie(positions, textureCoordinates, indices, bounds) = AbstractRenderer::render(font, cache, 0.25f, "abc", data.alignment);
/* Three glyphs, three quads -> 12 vertices, 18 indices */
CORRADE_COMPARE(positions.size(), 12);
CORRADE_COMPARE(textureCoordinates.size(), 12);
CORRADE_COMPARE(indices.size(), 18);
/* Alignment offset. Y would be -0.25f if it wasn't integral */
const Vector2 offset{-5.0f, 0.0f};
/* Vertex positions. Rectangles coming from the cache and offsets +
advances from the layouter are scaled by 0.5. First glyph is moved by
(scaled) 1 up and has advance of (scaled) {1, ±0.5}, every next glyph is
moved up and further distanced by (scaled) {1, ±0.5}. First glyph is
wide, the other two are square.
+-+
+-+ |c|
0---2 |b| +-+
| a | +-+
1---3 */
CORRADE_COMPARE_AS(positions, (std::vector<Vector2>{
/* Cursor is {0, 0}. Offset from the cache is {5, 10}, offset from the
renderer is {0, 1}, size is {20, 10}; all scaled by 0.5 */
Vector2{ 2.5f, 10.5f} + data.offset,
Vector2{ 2.5f, 5.5f} + data.offset,
Vector2{12.5f, 10.5f} + data.offset,
Vector2{12.5f, 5.5f} + data.offset,
/* Advance was {1, 0.5}, cursor is {1, 0.5}. Offset from the cache is
{10, 5}, offset from the renderer is {0, 2}, size is {10, 10}; all
scaled by 0.5 */
Vector2{ 5.5f, 8.75f} + data.offset,
Vector2{ 5.5f, 3.75f} + data.offset,
Vector2{10.5f, 8.75f} + data.offset,
Vector2{10.5f, 3.75f} + data.offset,
/* Advance was {2, -0.5}, cursor is {3, 0}. Offset from the cache is
{5, 5}, offset from the renderer is {0, 3}, size is {10, 10}; all
scaled by 0.5 */
Vector2{ 4.0f, 9.0f} + data.offset,
Vector2{ 4.0f, 4.0f} + data.offset,
Vector2{ 9.0f, 9.0f} + data.offset,
Vector2{ 9.0f, 4.0f} + data.offset
}), TestSuite::Compare::Container);
/* Bounds */
CORRADE_COMPARE(bounds, Range2D({0.0f, -0.5f}, {5.0f, 1.0f}).translated(offset));
CORRADE_COMPARE(bounds, (Range2D{{2.5f, 3.75f}, {12.5f, 10.5f}}.translated(data.offset)));
/* Vertex positions and texture coordinates
/* Texture coordinates. First glyph is bottom, second top left, third top
right.
+-+-+
|b|c|
0---2
| |
| |
| |
| a |
1---3 */
/* Vertex positions
+---+
+-+ | |
a |b| | c |
+-+ | |
+---+ */
CORRADE_COMPARE(positions, (std::vector<Vector2>{
Vector2{0.0f, 0.5f} + offset,
Vector2{0.0f, 0.0f} + offset,
Vector2{0.75f, 0.5f} + offset,
Vector2{0.75f, 0.0f} + offset,
Vector2{1.0f, 0.75f} + offset,
Vector2{1.0f, -0.25f} + offset,
Vector2{2.5f, 0.75f} + offset,
Vector2{2.5f, -0.25f} + offset,
Vector2{2.75f, 1.0f} + offset,
Vector2{2.75f, -0.5f} + offset,
Vector2{5.0f, 1.0f} + offset,
Vector2{5.0f, -0.5f} + offset
}));
/* Texture coordinates
+-+ +-+ +-+
|a| |b| |c|
+-+ +-+ +-+ */
CORRADE_COMPARE(textureCoordinates, (std::vector<Vector2>{
{0.0f, 10.0f},
{0.0f, 0.0f},
{6.0f, 10.0f},
{6.0f, 0.0f},
{ 6.0f, 10.0f},
{ 6.0f, 0.0f},
{12.0f, 10.0f},
{12.0f, 0.0f},
{12.0f, 10.0f},
{12.0f, 0.0f},
{18.0f, 10.0f},
{18.0f, 0.0f}
}));
CORRADE_COMPARE_AS(textureCoordinates, (std::vector<Vector2>{
{0.0f, 0.5f},
{0.0f, 0.0f},
{1.0f, 0.5f},
{1.0f, 0.0f},
{0.0f, 1.0f},
{0.0f, 0.5f},
{0.5f, 1.0f},
{0.5f, 0.5f},
{0.5f, 1.0f},
{0.5f, 0.5f},
{1.0f, 1.0f},
{1.0f, 0.5f}
}), TestSuite::Compare::Container);
/* Indices
0---2 0---2 5
@ -165,50 +242,59 @@ void RendererGLTest::renderData() {
| | | / / |
| | |/ / |
1---3 1 3---4 */
CORRADE_COMPARE(indices, (std::vector<UnsignedInt>{
CORRADE_COMPARE_AS(indices, (std::vector<UnsignedInt>{
0, 1, 2, 1, 3, 2,
4, 5, 6, 5, 7, 6,
8, 9, 10, 9, 11, 10
}));
}), TestSuite::Compare::Container);
}
void RendererGLTest::renderMesh() {
/* Like render(middle center), but with a mesh output instead of data */
TestFont font;
font.openFile({}, 0.5f);
GlyphCache cache = testGlyphCache(font);
/* Capture the correct function name */
CORRADE_VERIFY(true);
GL::Mesh mesh{NoCreate};
GL::Buffer vertexBuffer{GL::Buffer::TargetHint::Array},
indexBuffer{GL::Buffer::TargetHint::ElementArray};
Range2D bounds;
std::tie(mesh, bounds) = Renderer3D::render(font, nullGlyphCache,
0.25f, "abc", vertexBuffer, indexBuffer, GL::BufferUsage::StaticDraw, Alignment::TopCenter);
std::tie(mesh, bounds) = Renderer3D::render(font, cache,
0.25f, "abc", vertexBuffer, indexBuffer, GL::BufferUsage::StaticDraw, Alignment::MiddleCenter);
MAGNUM_VERIFY_NO_GL_ERROR();
/* Alignment offset */
const Vector2 offset{-2.5f, -1.0f};
/** @todo same as in render(), figure out if the initial offset makes
sense or not */
const Vector2 offset{-5.0f - 2.5f, -3.5f - 3.625f};
/* Bounds */
CORRADE_COMPARE(bounds, Range2D({0.0f, -0.5f}, {5.0f, 1.0f}).translated(offset));
CORRADE_COMPARE(bounds, (Range2D{{2.5f, 3.75f}, {12.5f, 10.5f}}.translated(offset)));
/** @todo How to verify this on ES? */
#ifndef MAGNUM_TARGET_GLES
/* Vertex buffer contents */
Containers::Array<char> vertices = vertexBuffer.data();
CORRADE_COMPARE_AS(Containers::arrayCast<const Float>(vertices),
Containers::arrayView<Float>({
0.0f + offset.x(), 0.5f + offset.y(), 0.0f, 10.0f,
0.0f + offset.x(), 0.0f + offset.y(), 0.0f, 0.0f,
0.75f + offset.x(), 0.5f + offset.y(), 6.0f, 10.0f,
0.75f + offset.x(), 0.0f + offset.y(), 6.0f, 0.0f,
1.0f + offset.x(), 0.75f + offset.y(), 6.0f, 10.0f,
1.0f + offset.x(), -0.25f + offset.y(), 6.0f, 0.0f,
2.5f + offset.x(), 0.75f + offset.y(), 12.0f, 10.0f,
2.5f + offset.x(), -0.25f + offset.y(), 12.0f, 0.0f,
2.75f + offset.x(), 1.0f + offset.y(), 12.0f, 10.0f,
2.75f + offset.x(), -0.5f + offset.y(), 12.0f, 0.0f,
5.0f + offset.x(), 1.0f + offset.y(), 18.0f, 10.0f,
5.0f + offset.x(), -0.5f + offset.y(), 18.0f, 0.0f
}), TestSuite::Compare::Container);
CORRADE_COMPARE_AS(Containers::arrayCast<const Vector2>(vertices), Containers::arrayView<Vector2>({
Vector2{ 2.5f, 10.5f} + offset, {0.0f, 0.5f},
Vector2{ 2.5f, 5.5f} + offset, {0.0f, 0.0f},
Vector2{12.5f, 10.5f} + offset, {1.0f, 0.5f},
Vector2{12.5f, 5.5f} + offset, {1.0f, 0.0f},
Vector2{ 5.5f, 8.75f} + offset, {0.0f, 1.0f},
Vector2{ 5.5f, 3.75f} + offset, {0.0f, 0.5f},
Vector2{10.5f, 8.75f} + offset, {0.5f, 1.0f},
Vector2{10.5f, 3.75f} + offset, {0.5f, 0.5f},
Vector2{ 4.0f, 9.0f} + offset, {0.5f, 1.0f},
Vector2{ 4.0f, 4.0f} + offset, {0.5f, 0.5f},
Vector2{ 9.0f, 9.0f} + offset, {1.0f, 1.0f},
Vector2{ 9.0f, 4.0f} + offset, {1.0f, 0.5f},
}), TestSuite::Compare::Container);
Containers::Array<char> indices = indexBuffer.data();
CORRADE_COMPARE_AS(Containers::arrayCast<const UnsignedByte>(indices),
@ -223,6 +309,12 @@ void RendererGLTest::renderMesh() {
void RendererGLTest::renderMeshIndexType() {
#ifndef MAGNUM_TARGET_GLES
TestFont font;
font.openFile({}, 0.5f);
GlyphCache cache = testGlyphCache(font);
/* Capture the correct function name */
CORRADE_VERIFY(true);
GL::Mesh mesh{NoCreate};
GL::Buffer vertexBuffer, indexBuffer;
@ -230,7 +322,7 @@ void RendererGLTest::renderMeshIndexType() {
texture coordinates, each float is four bytes; six indices per glyph. */
/* 8-bit indices (exactly 256 vertices) */
std::tie(mesh, std::ignore) = Renderer3D::render(font, nullGlyphCache,
std::tie(mesh, std::ignore) = Renderer3D::render(font, cache,
1.0f, std::string(64, 'a'), vertexBuffer, indexBuffer, GL::BufferUsage::StaticDraw);
MAGNUM_VERIFY_NO_GL_ERROR();
Containers::Array<char> indicesByte = indexBuffer.data();
@ -244,7 +336,7 @@ void RendererGLTest::renderMeshIndexType() {
}), TestSuite::Compare::Container);
/* 16-bit indices (260 vertices) */
std::tie(mesh, std::ignore) = Renderer3D::render(font, nullGlyphCache,
std::tie(mesh, std::ignore) = Renderer3D::render(font, cache,
1.0f, std::string(65, 'a'), vertexBuffer, indexBuffer, GL::BufferUsage::StaticDraw);
MAGNUM_VERIFY_NO_GL_ERROR();
Containers::Array<char> indicesShort = indexBuffer.data();
@ -271,8 +363,13 @@ void RendererGLTest::mutableText() {
CORRADE_SKIP("No required extension is supported");
#endif
/* Like render(middle center) and renderMesh(), but modifying an instance
instead of rendering once */
TestFont font;
Renderer2D renderer(font, nullGlyphCache, 0.25f);
font.openFile({}, 0.5f);
GlyphCache cache = testGlyphCache(font);
Renderer2D renderer(font, cache, 0.25f, Alignment::MiddleCenter);
MAGNUM_VERIFY_NO_GL_ERROR();
CORRADE_COMPARE(renderer.capacity(), 0);
CORRADE_COMPARE(renderer.fontSize(), 0.25f);
@ -298,87 +395,103 @@ void RendererGLTest::mutableText() {
renderer.render("abc");
MAGNUM_VERIFY_NO_GL_ERROR();
/* Updated bounds */
CORRADE_COMPARE(renderer.rectangle(), Range2D({0.0f, -0.5f}, {5.0f, 1.0f}));
/* Alignment offset */
/** @todo same as in render(), figure out if the initial offset makes
sense or not */
const Vector2 offset{-5.0f - 2.5f, -3.5f - 3.625f};
/* Aligned to line/left, no offset needed */
/* Updated bounds and mesh vertex count */
CORRADE_COMPARE(renderer.rectangle(), (Range2D{{2.5f, 3.75f}, {12.5f, 10.5f} }.translated(offset)));
CORRADE_COMPARE(renderer.mesh().count(), 3*6);
/** @todo How to verify this on ES? */
#ifndef MAGNUM_TARGET_GLES
Containers::Array<char> vertices = renderer.vertexBuffer().data();
CORRADE_COMPARE_AS(Containers::arrayCast<const Float>(vertices).prefix(48),
Containers::arrayView<Float>({
0.0f, 0.5f, 0.0f, 10.0f,
0.0f, 0.0f, 0.0f, 0.0f,
0.75f, 0.5f, 6.0f, 10.0f,
0.75f, 0.0f, 6.0f, 0.0f,
1.0f, 0.75f, 6.0f, 10.0f,
1.0f, -0.25f, 6.0f, 0.0f,
2.5f, 0.75f, 12.0f, 10.0f,
2.5f, -0.25f, 12.0f, 0.0f,
2.75f, 1.0f, 12.0f, 10.0f,
2.75f, -0.5f, 12.0f, 0.0f,
5.0f, 1.0f, 18.0f, 10.0f,
5.0f, -0.5f, 18.0f, 0.0f
}), TestSuite::Compare::Container);
CORRADE_COMPARE_AS(Containers::arrayCast<const Vector2>(vertices).prefix(2*4*3), Containers::arrayView<Vector2>({
Vector2{ 2.5f, 10.5f} + offset, {0.0f, 0.5f},
Vector2{ 2.5f, 5.5f} + offset, {0.0f, 0.0f},
Vector2{12.5f, 10.5f} + offset, {1.0f, 0.5f},
Vector2{12.5f, 5.5f} + offset, {1.0f, 0.0f},
Vector2{ 5.5f, 8.75f} + offset, {0.0f, 1.0f},
Vector2{ 5.5f, 3.75f} + offset, {0.0f, 0.5f},
Vector2{10.5f, 8.75f} + offset, {0.5f, 1.0f},
Vector2{10.5f, 3.75f} + offset, {0.5f, 0.5f},
Vector2{ 4.0f, 9.0f} + offset, {0.5f, 1.0f},
Vector2{ 4.0f, 4.0f} + offset, {0.5f, 0.5f},
Vector2{ 9.0f, 9.0f} + offset, {1.0f, 1.0f},
Vector2{ 9.0f, 4.0f} + offset, {1.0f, 0.5f},
}), TestSuite::Compare::Container);
#endif
}
void RendererGLTest::multiline() {
class Layouter: public AbstractLayouter {
public:
explicit Layouter(UnsignedInt glyphCount): AbstractLayouter(glyphCount) {}
private:
Containers::Triple<Range2D, Range2D, Vector2> doRenderGlyph(UnsignedInt) override {
return {{{}, Vector2(1.0f)},
Range2D({}, Vector2(1.0f)),
Vector2::xAxis(2.0f)};
}
struct Layouter: AbstractLayouter {
explicit Layouter(const AbstractGlyphCache& cache, UnsignedInt fontId, Float scale, UnsignedInt glyphCount): AbstractLayouter{glyphCount}, _cache(cache), _fontId{fontId}, _scale{scale} {}
Containers::Triple<Range2D, Range2D, Vector2> doRenderGlyph(UnsignedInt) override {
Containers::Triple<Vector2i, Int, Range2Di> glyph = _cache.glyph(_fontId, 0);
CORRADE_VERIFY(glyph.second() == 0);
return {
Range2D::fromSize(Vector2{glyph.first()}*_scale,
Vector2{glyph.third().size()}*_scale),
Range2D{glyph.third()}.scaled(1.0f/Vector2{_cache.size().xy()}),
Vector2::xAxis(4.0f)*_scale
};
}
const AbstractGlyphCache& _cache;
UnsignedInt _fontId;
Float _scale;
};
class Font: public AbstractFont {
public:
explicit Font(): _opened(false) {}
struct: AbstractFont {
FontFeatures doFeatures() const override { return {}; }
private:
FontFeatures doFeatures() const override { return {}; }
bool doIsOpened() const override { return _opened; }
void doClose() override { _opened = false; }
bool doIsOpened() const override { return _opened; }
void doClose() override { _opened = false; }
Properties doOpenFile(Containers::StringView, Float size) override {
_opened = true;
/* The ascent and descent values shouldn't be used for anything
here and so can be completely arbitrary */
return {size, -10000.0f, 1000.0f, 6.0f, 10};
}
Properties doOpenFile(Containers::StringView, Float) override {
_opened = true;
return {0.5f, 0.45f, -0.25f, 0.75f, 1};
}
UnsignedInt doGlyphId(char32_t) override { return 0; }
Vector2 doGlyphSize(UnsignedInt) override { return {}; }
Vector2 doGlyphAdvance(UnsignedInt) override { return {}; }
UnsignedInt doGlyphId(char32_t) override { return 0; }
Vector2 doGlyphSize(UnsignedInt) override { return {}; }
Vector2 doGlyphAdvance(UnsignedInt) override { return {}; }
Containers::Pointer<AbstractLayouter> doLayout(const AbstractGlyphCache& cache, Float size, Containers::StringView text) override {
/* The final rendered size should be a ratio of the font and layout
size */
return Containers::pointer<Layouter>(cache, *cache.findFont(this), size/this->size(), UnsignedInt(text.size()));
}
Containers::Pointer<AbstractLayouter> doLayout(const AbstractGlyphCache&, Float, Containers::StringView text) override {
return Containers::pointer<Layouter>(UnsignedInt(text.size()));
}
bool _opened = false;
} font;
font.openFile({}, 0.5f);
bool _opened;
};
/* Just a single glyph that scales to {1, 1} in the end */
GlyphCache cache{{20, 20}};
UnsignedInt fontId = cache.addFont(1, &font);
cache.addGlyph(fontId, 0, {}, {{}, {2, 2}});
/* Capture the correct function name */
CORRADE_VERIFY(true);
Font font;
font.openFile({}, 0.0f);
Range2D rectangle;
std::vector<UnsignedInt> indices;
std::vector<Vector2> positions, textureCoordinates;
std::tie(positions, textureCoordinates, indices, rectangle) = Renderer2D::render(font,
nullGlyphCache, 2.0f, "abcd\nef\n\nghi", Alignment::MiddleCenter);
cache, 0.25f, "abcd\nef\n\nghi", Alignment::MiddleCenter);
/* We're rendering text at 2.0f size and the font is scaled to 0.3f, so the
line advance should be 0.75f*2.0f/0.5f = 3.0f */
/* We're rendering text at 0.25f size and the font is scaled to 0.5f, so
the line advance should be 6.0f*0.25f/0.5f = 3.0f */
CORRADE_COMPARE(font.size(), 0.5f);
CORRADE_COMPARE(font.ascent(), 0.45f);
CORRADE_COMPARE(font.descent(), -0.25f);
CORRADE_COMPARE(font.lineHeight(), 0.75f);
CORRADE_COMPARE(font.lineHeight(), 6.0f);
/* Bounds */
CORRADE_COMPARE(rectangle, Range2D({-3.5f, -5.0f}, {3.5f, 5.0f}));
@ -389,32 +502,34 @@ void RendererGLTest::multiline() {
[g] [h] [i] */
CORRADE_COMPARE_AS(positions, (std::vector<Vector2>{
Vector2{-3.5f, 5.0f}, Vector2{-3.5f, 4.0f}, /* a */
Vector2{-2.5f, 5.0f}, Vector2{-2.5f, 4.0f},
{-3.5f, 5.0f}, {-3.5f, 4.0f}, /* a */
{-2.5f, 5.0f}, {-2.5f, 4.0f},
{-1.5f, 5.0f}, {-1.5f, 4.0f}, /* b */
{-0.5f, 5.0f}, {-0.5f, 4.0f},
Vector2{-1.5f, 5.0f}, Vector2{-1.5f, 4.0f}, /* b */
Vector2{-0.5f, 5.0f}, Vector2{-0.5f, 4.0f},
{ 0.5f, 5.0f}, { 0.5f, 4.0f}, /* c */
{ 1.5f, 5.0f}, { 1.5f, 4.0f},
Vector2{ 0.5f, 5.0f}, Vector2{ 0.5f, 4.0f}, /* c */
Vector2{ 1.5f, 5.0f}, Vector2{ 1.5f, 4.0f},
{ 2.5f, 5.0f}, { 2.5f, 4.0f}, /* d */
{ 3.5f, 5.0f}, { 3.5f, 4.0f},
Vector2{ 2.5f, 5.0f}, Vector2{ 2.5f, 4.0f}, /* d */
Vector2{ 3.5f, 5.0f}, Vector2{ 3.5f, 4.0f},
{-1.5f, 2.0f}, {-1.5f, 1.0f}, /* e */
{-0.5f, 2.0f}, {-0.5f, 1.0f},
Vector2{-1.5f, 2.0f}, Vector2{-1.5f, 1.0f}, /* e */
Vector2{-0.5f, 2.0f}, Vector2{-0.5f, 1.0f},
{ 0.5f, 2.0f}, { 0.5f, 1.0f}, /* f */
{ 1.5f, 2.0f}, { 1.5f, 1.0f},
Vector2{ 0.5f, 2.0f}, Vector2{ 0.5f, 1.0f}, /* f */
Vector2{ 1.5f, 2.0f}, Vector2{ 1.5f, 1.0f},
/* Two linebreaks here */
Vector2{-2.5f, -4.0f}, Vector2{-2.5f, -5.0f}, /* g */
Vector2{-1.5f, -4.0f}, Vector2{-1.5f, -5.0f},
{-2.5f, -4.0f}, {-2.5f, -5.0f}, /* g */
{-1.5f, -4.0f}, {-1.5f, -5.0f},
Vector2{-0.5f, -4.0f}, Vector2{-0.5f, -5.0f}, /* h */
Vector2{ 0.5f, -4.0f}, Vector2{ 0.5f, -5.0f},
{-0.5f, -4.0f}, {-0.5f, -5.0f}, /* h */
{ 0.5f, -4.0f}, { 0.5f, -5.0f},
Vector2{ 1.5f, -4.0f}, Vector2{ 1.5f, -5.0f}, /* i */
Vector2{ 2.5f, -4.0f}, Vector2{ 2.5f, -5.0f},
{ 1.5f, -4.0f}, { 1.5f, -5.0f}, /* i */
{ 2.5f, -4.0f}, { 2.5f, -5.0f},
}), TestSuite::Compare::Container);
/* Indices

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