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Text alignment and point size

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This commit is contained in:
Dan Paulat 2021-08-07 08:12:14 -05:00
parent ee0f3b35bf
commit 89ca94eda8
4 changed files with 42 additions and 9 deletions
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24
scwx-qt/source/scwx/qt/gl/text_shader.cpp
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@ -55,11 +55,12 @@ bool TextShader::Initialize()
void TextShader::RenderText(const std::string& text,
float x,
float y,
float scale,
float pointSize,
const glm::mat4& projection,
const boost::gil::rgba8_pixel_t& color,
std::shared_ptr<util::Font> font,
GLuint textureId)
GLuint textureId,
TextAlign align)
{
OpenGLFunctions& gl = p->gl_;
@ -74,9 +75,26 @@ void TextShader::RenderText(const std::string& text,
gl.glActiveTexture(GL_TEXTURE0);
gl.glBindTexture(GL_TEXTURE_2D, textureId);
switch (align)
{
case TextAlign::Left:
// Do nothing
break;
case TextAlign::Center:
// X position is the center of text, subtract half length
x -= font->TextLength(text, pointSize) * 0.5f;
break;
case TextAlign::Right:
// X position is the end of text, subtract length
x -= font->TextLength(text, pointSize);
break;
}
std::shared_ptr<util::FontBuffer> buffer =
std::make_shared<util::FontBuffer>();
font->BufferText(buffer, text, x, y, scale, color);
font->BufferText(buffer, text, x, y, pointSize, color);
buffer->Render(gl);
}

10
scwx-qt/source/scwx/qt/gl/text_shader.hpp
View file

@ -15,6 +15,13 @@ namespace qt
namespace gl
{
enum class TextAlign
{
Left,
Center,
Right
};
class TextShaderImpl;
class TextShader : public ShaderProgram
@ -37,7 +44,8 @@ public:
const glm::mat4& projection,
const boost::gil::rgba8_pixel_t& color,
std::shared_ptr<util::Font> font,
GLuint textureId);
GLuint textureId,
TextAlign align = TextAlign::Left);
void SetProjection(const glm::mat4& projection);
private: