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arielmarielm
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Drawing2dText: Surrounding text in place
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6 files changed

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6 files changed

+225
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lines changed

‎sketches/Drawing2dText/CMakeLists.txt

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cmake_minimum_required (VERSION 3.2.2)
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project(Drawing2dText)
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set(INCLUDE_DIRS
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$ENV{CODE_PATH}
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)
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set(SRC_FILES
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"src/Sketch.cpp"
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"$ENV{CODE_PATH}/common/xf/Font.cpp"
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"$ENV{CODE_PATH}/common/xf/FontManager.cpp"
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"$ENV{CODE_PATH}/common/xf/FontSequence.cpp"
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"$ENV{CODE_PATH}/common/quad/QuadBatch.cpp"
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)
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#
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# For Mojave and up
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#
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add_compile_definitions(
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GL_SILENCE_DEPRECATION
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)
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include("$ENV{CROSS_PATH}/core/cmake/sketch.cmake")
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include("$ENV{CROSS_PATH}/core/cmake/test.cmake")

‎sketches/Drawing2dText/CTestConfig.cmake

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set(CTEST_PROJECT_NAME Drawing2dText)
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set(CTEST_CONFIGURATION_TYPE Release)
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if (PLATFORM MATCHES osx|linux)
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set(ARGS
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-DRUN=EXE
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)
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elseif (PLATFORM MATCHES emscripten)
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set(ARGS
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-DRUN=BROWSER
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)
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endif()
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include("$ENV{CROSS_PATH}/core/cmake/platforms.cmake")

‎sketches/Drawing2dText/res/Helvetica_Regular_64.fnt

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‎sketches/Drawing2dText/src/Sketch.cpp

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#include "Sketch.h"
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using namespace std;
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using namespace chr;
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using namespace gl;
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constexpr float PADDING = 20;
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void Sketch::setup()
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{
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font1 = fontManager.getFont(InputSource::resource("Helvetica_Regular_64.fnt"), XFont::Properties2d());
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font1->setShader(textureAlphaShader);
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font1->setSize(20);
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font1->setColor(0, 0, 0, 1);
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strokeBatch
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.setPrimitive(GL_LINES)
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.setShader(colorShader)
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.setShaderColor(0, 0, 0, 0.25f);
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// ---
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glDisable(GL_DEPTH_TEST);
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glDepthMask(GL_FALSE);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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void Sketch::resize()
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{
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strokeBatch.clear();
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drawGuides();
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drawText1();
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}
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void Sketch::draw()
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{
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glClearColor(1, 1, 1, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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// ---
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auto projectionMatrix = glm::ortho(0.0f, windowInfo.width, 0.0f, windowInfo.height);
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Matrix modelViewMatrix;
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modelViewMatrix
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.translate(0, windowInfo.height)
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.scale(1, -1);
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gl::State()
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.setShaderMatrix(modelViewMatrix * projectionMatrix)
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.apply();
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// ---
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strokeBatch.flush();
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font1->replaySequence(sequence1);
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}
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void Sketch::drawGuides()
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{
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float width = windowInfo.width;
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float height = windowInfo.height;
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strokeBatch.addVertices(glm::vec2(PADDING, 0), glm::vec2(PADDING, height));
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strokeBatch.addVertices(glm::vec2(width - PADDING, 0), glm::vec2(width - PADDING, height));
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strokeBatch.addVertices(glm::vec2(0, PADDING), glm::vec2(width, PADDING));
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strokeBatch.addVertices(glm::vec2(0, height - PADDING), glm::vec2(width, height - PADDING));
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}
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void Sketch::drawText1()
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{
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font1->beginSequence(sequence1);
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drawText(*font1, u"bottom-left", PADDING, windowInfo.height - PADDING);
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drawAlignedText(*font1, u"top-left", glm::vec2(PADDING, PADDING), XFont::ALIGN_LEFT, XFont::ALIGN_TOP);
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drawAlignedText(*font1, u"top-right", glm::vec2(windowInfo.width - PADDING, PADDING), XFont::ALIGN_RIGHT, XFont::ALIGN_TOP);
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drawAlignedText(*font1, u"bottom-right", glm::vec2(windowInfo.width - PADDING, windowInfo.height - PADDING), XFont::ALIGN_RIGHT, XFont::ALIGN_BASELINE);
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drawAlignedText(*font1, u"top-middle", glm::vec2(windowInfo.width / 2, PADDING), XFont::ALIGN_MIDDLE, XFont::ALIGN_TOP);
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drawAlignedText(*font1, u"bottom-middle", glm::vec2(windowInfo.width / 2, windowInfo.height - PADDING), XFont::ALIGN_MIDDLE, XFont::ALIGN_BASELINE);
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Matrix matrix;
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matrix
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.translate(PADDING, windowInfo.height / 2)
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.rotateZ(-HALF_PI);
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drawAlignedText(*font1, u"middle-left", matrix, XFont::ALIGN_MIDDLE, XFont::ALIGN_TOP);
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matrix
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.setTranslate(windowInfo.width - PADDING, windowInfo.height / 2)
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.rotateZ(HALF_PI);
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drawAlignedText(*font1, u"middle-right", matrix, XFont::ALIGN_MIDDLE, XFont::ALIGN_TOP);
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font1->endSequence();
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}
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void Sketch::drawText(XFont &font, const u16string &text, float x, float y)
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{
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for (auto c : text)
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{
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auto glyphIndex = font.getGlyphIndex(c);
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font.addGlyph(glyphIndex, x, y);
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x += font.getGlyphAdvance(glyphIndex);
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}
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}
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void Sketch::drawAlignedText(XFont &font, const u16string &text, const glm::vec2 &position, XFont::Alignment alignX, XFont::Alignment alignY)
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{
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auto center = position + font.getOffset(text, alignX, alignY);
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drawText(font, text, center.x, center.y);
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}
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void Sketch::drawAlignedText(XFont &font, const u16string &text, Matrix &matrix, XFont::Alignment alignX, XFont::Alignment alignY)
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{
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auto offset = font.getOffset(text, alignX, alignY);
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for (auto c : text)
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{
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auto glyphIndex = font.getGlyphIndex(c);
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font.addGlyph(matrix, glyphIndex, offset.x, offset.y);
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offset.x += font.getGlyphAdvance(glyphIndex);
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}
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}

‎sketches/Drawing2dText/src/Sketch.h

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#pragma once
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#include "chr/cross/Context.h"
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#include "chr/gl/Batch.h"
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#include "chr/gl/shaders/ColorShader.h"
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#include "chr/gl/shaders/TextureAlphaShader.h"
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#include "common/xf/FontManager.h"
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class Sketch : public chr::CrossSketch
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{
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public:
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void setup() final;
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void resize();
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void draw() final;
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protected:
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chr::gl::VertexBatch<chr::gl::XYZ> strokeBatch;
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chr::gl::shaders::ColorShader colorShader;
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chr::xf::FontManager fontManager;
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std::shared_ptr<chr::XFont> font1;
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chr::xf::FontSequence sequence1;
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chr::gl::shaders::TextureAlphaShader textureAlphaShader;
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void drawGuides();
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void drawText1();
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static void drawText(chr::XFont &font, const std::u16string &text, float x, float y);
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static void drawAlignedText(chr::XFont &font, const std::u16string &text, const glm::vec2 &position, chr::XFont::Alignment alignX, chr::XFont::Alignment alignY);
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static void drawAlignedText(chr::XFont &font, const std::u16string &text, chr::gl::Matrix &matrix, chr::XFont::Alignment alignX, chr::XFont::Alignment alignY);
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};

‎sketches/Drawing2dText/src/main.cpp

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#include "Sketch.h"
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namespace chr
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{
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CrossSketch* createSketch()
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{
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return new Sketch();
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}
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}
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#if defined(CHR_PLATFORM_DESKTOP)
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int main(int argc, char** argv)
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{
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chr::CrossSketch::run(1200, 900, 4);
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return 0;
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}
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#elif defined(CHR_PLATFORM_EMSCRIPTEN)
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int main(int argc, char** argv)
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{
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chr::CrossSketch::run(4);
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return 0;
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}
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#endif

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