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#include "Painter.h"
#include "FrameBufferSDL.h"
#include "Widget.h"
#include "Font.h"
#include <AK/Assertions.h>
#include <SDL.h>
Painter::Painter(Widget& widget)
: m_widget(widget)
, m_font(Font::defaultFont())
{
}
Painter::~Painter()
{
int rc = SDL_UpdateWindowSurface(FrameBufferSDL::the().window());
ASSERT(rc == 0);
}
static dword* scanline(int y)
{
auto& surface = *FrameBufferSDL::the().surface();
return (dword*)(((byte*)surface.pixels) + (y * surface.pitch));
}
void Painter::fillRect(const Rect& rect, Color color)
{
Rect r = rect;
r.moveBy(m_widget.x(), m_widget.y());
for (int y = r.top(); y < r.bottom(); ++y) {
dword* bits = scanline(y);
for (int x = r.left(); x < r.right(); ++x) {
bits[x] = color.value();
}
}
}
void Painter::drawRect(const Rect& rect, Color color)
{
Rect r = rect;
r.moveBy(m_widget.x(), m_widget.y());
for (int y = r.top(); y < r.bottom(); ++y) {
dword* bits = scanline(y);
if (y == r.top() || y == (r.bottom() - 1)) {
for (int x = r.left(); x < r.right(); ++x) {
bits[x] = color.value();
}
} else {
bits[r.left()] = color.value();
bits[r.right() - 1] = color.value();
}
}
}
void Painter::drawText(const Rect& rect, const String& text, TextAlignment alignment, const Color& color)
{
Point point;
if (alignment == TextAlignment::TopLeft) {
point = rect.location();
point.moveBy(m_widget.x(), m_widget.y());
} else if (alignment == TextAlignment::Center) {
int textWidth = text.length() * m_font.glyphWidth();
point = rect.center();
point.moveBy(-(textWidth / 2), -(m_font.glyphWidth() / 2));
point.moveBy(m_widget.x(), m_widget.y());
} else {
ASSERT_NOT_REACHED();
}
for (int row = 0; row < m_font.glyphHeight(); ++row) {
int y = point.y() + row;
dword* bits = scanline(y);
for (unsigned i = 0; i < text.length(); ++i) {
byte ch = text[i];
if (ch == ' ')
continue;
const char* glyph = m_font.glyph(ch);
if (!glyph) {
printf("Font doesn't have 0x%02x ('%c')\n", ch, ch);
ASSERT_NOT_REACHED();
}
int x = point.x() + i * m_font.glyphWidth();
for (int j = 0; j < m_font.glyphWidth(); ++j) {
char fc = glyph[row * m_font.glyphWidth() + j];
if (fc == '#')
bits[x + j] = color.value();
}
}
}
}
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