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Use an OpenGL array object to draw the cursor

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This commit is contained in:
Josh Holtrop 2016-08-27 17:36:31 -04:00
parent 33a190c495
commit 01bf455e68
2 changed files with 16 additions and 9 deletions
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23
src/gui/Window.cc
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@ -123,8 +123,12 @@ bool Window::create(std::shared_ptr<Buffer> buffer)
m_font.get_advance(), 0,
m_font.get_advance(), m_font.get_line_height(),
0, m_font.get_line_height()};
m_cursor_array = glcxx::Array::create();
m_cursor_array->bind();
m_cursor_buffer = glcxx::Buffer::create(GL_ARRAY_BUFFER, GL_STATIC_DRAW,
cursor_bounds, sizeof(cursor_bounds));
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_INT, GL_FALSE, 0, 0);
m_buffer = buffer;
m_cursor = m_buffer->piece_table->add_cursor();
@ -276,15 +280,7 @@ void Window::redraw()
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glBindVertexArray(0);
m_shaders.flat->use();
m_shaders.flat->set_color(1.0, 0.2, 1.0, 1.0);
m_shaders.flat->set_position(0, m_height - m_font.get_line_height());
m_cursor_buffer->bind();
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_INT, GL_FALSE, 0, 0);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
draw_cursor();
m_shaders.text->use();
int advance = m_font.get_advance();
@ -324,3 +320,12 @@ void Window::redraw()
SDL_GL_SwapWindow(m_window);
}
void Window::draw_cursor()
{
m_cursor_array->bind();
m_shaders.flat->use();
m_shaders.flat->set_color(1.0, 0.2, 1.0, 1.0);
m_shaders.flat->set_position(0, m_height - m_font.get_line_height());
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}

2
src/gui/Window.h
View File

@ -17,6 +17,7 @@ public:
protected:
void resize();
void redraw();
void draw_cursor();
void handle_event(SDL_Event & event);
void handle_key(uint32_t scancode, uint32_t mod);
void scroll_down();
@ -38,6 +39,7 @@ protected:
std::shared_ptr<Buffer> m_buffer;
std::shared_ptr<glcxx::Array> m_cursor_array;
std::shared_ptr<glcxx::Buffer> m_cursor_buffer;
std::shared_ptr<PieceTable::Cursor> m_cursor;