jgrogan/stuff-from-scratch
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Add Keyboard input and enter support for text editor.

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This commit is contained in:
James Grogan 2022-11-17 13:13:01 +00:00
parent cf9bace272
commit 9301769d58
23 changed files with 315 additions and 121 deletions
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64
src/graphics/opengl/OpenGlTextPainter.cpp
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@ -44,13 +44,16 @@ void OpenGlTextPainter::initializeShader()
void OpenGlTextPainter::initializeTextures(const TextData& textData, DrawingContext* context)
{
for (auto c : textData.mContent)
for (auto line : textData.mLines)
{
if (auto iter = mFontTextures.find(c); iter == mFontTextures.end())
for (auto c : line)
{
auto glyph = context->getFontsManager()->getGlyph(textData.mFont.getFaceName(), textData.mFont.getSize(), c);
auto new_texture = std::make_unique<OpenGlFontTexture>(glyph);
mFontTextures[c] = std::move(new_texture);
if (auto iter = mFontTextures.find(c); iter == mFontTextures.end())
{
auto glyph = context->getFontsManager()->getGlyph(textData.mFont.getFaceName(), textData.mFont.getSize(), c);
auto new_texture = std::make_unique<OpenGlFontTexture>(glyph);
mFontTextures[c] = std::move(new_texture);
}
}
}
}
@ -104,36 +107,43 @@ void OpenGlTextPainter::paint(SceneText* text, DrawingContext* context)
auto transform = text->getTransform();
float x = transform.getLocation().getX();
const float y = height - transform.getLocation().getY();
for (auto c : text_data.mContent)
float line_delta = 20;
float line_offset = 0;
for (auto line : text_data.mLines)
{
auto texture = mFontTextures[c].get();
float x = transform.getLocation().getX();
const float y = height - line_offset - transform.getLocation().getY();
for (auto c : line)
{
auto texture = mFontTextures[c].get();
float xpos = x + texture->getGlyph()->getBearingX();
float ypos = y - (texture->getGlyph()->getHeight() - texture->getGlyph()->getBearingY());
float xpos = x + texture->getGlyph()->getBearingX();
float ypos = y - (texture->getGlyph()->getHeight() - texture->getGlyph()->getBearingY());
float w = texture->getGlyph()->getWidth();
float h = texture->getGlyph()->getHeight();
float vertices[6][4] = {
{ xpos, ypos + h, 0.0f, 0.0f },
{ xpos, ypos, 0.0f, 1.0f },
{ xpos + w, ypos, 1.0f, 1.0f },
float w = texture->getGlyph()->getWidth();
float h = texture->getGlyph()->getHeight();
float vertices[6][4] = {
{ xpos, ypos + h, 0.0f, 0.0f },
{ xpos, ypos, 0.0f, 1.0f },
{ xpos + w, ypos, 1.0f, 1.0f },
{ xpos, ypos + h, 0.0f, 0.0f },
{ xpos + w, ypos, 1.0f, 1.0f },
{ xpos + w, ypos + h, 1.0f, 0.0f }
};
{ xpos, ypos + h, 0.0f, 0.0f },
{ xpos + w, ypos, 1.0f, 1.0f },
{ xpos + w, ypos + h, 1.0f, 0.0f }
};
glBindTexture(GL_TEXTURE_2D, texture->getHandle());
glBindTexture(GL_TEXTURE_2D, texture->getHandle());
glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glDrawArrays(GL_TRIANGLES, 0, 6);
glDrawArrays(GL_TRIANGLES, 0, 6);
x += (texture->getGlyph()->getAdvanceX() >> 6); // bitshift by 6 to get value in pixels (2^6 = 64)
x += (texture->getGlyph()->getAdvanceX() >> 6); // bitshift by 6 to get value in pixels (2^6 = 64)
}
line_offset += line_delta;
}
glBindVertexArray(0);