Initial optimized version LCD display emulation.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

1 files changed, 52 insertions, 0 deletions

diff --git a/qtmips_gui/lcddisplayview.cpp b/qtmips_gui/lcddisplayview.cpp
new file mode 100644
index 0000000..450e7d4
--- /dev/null
+++ b/qtmips_gui/lcddisplayview.cpp
@@ -0,0 +1,52 @@
+#include <QPainter>
+#include <QStyle>
+#include "lcddisplay.h"
+#include "lcddisplayview.h"
+
+LcdDisplayView::LcdDisplayView(QWidget *parent) : Super(parent) {
+    setMinimumSize(100, 100);
+    fb_pixels = nullptr;
+}
+
+LcdDisplayView::~LcdDisplayView() {
+    if (fb_pixels != nullptr)
+        delete fb_pixels;
+}
+
+void LcdDisplayView::setup(machine::LcdDisplay *lcd_display) {
+    if (lcd_display == nullptr)
+        return;
+    connect(lcd_display, SIGNAL(pixel_update(uint,uint,uint,uint,uint)),
+            this, SLOT(pixel_update(uint,uint,uint,uint,uint)));
+    if (fb_pixels != nullptr)
+        delete fb_pixels;
+    fb_pixels = nullptr;
+    fb_pixels = new QImage(lcd_display->height(),
+                           lcd_display->width(), QImage::Format_RGB32);
+    fb_pixels->fill(qRgb(0, 0, 0));
+    update();
+}
+
+void LcdDisplayView::pixel_update(uint x, uint y, uint r, uint g, uint b) {
+    if (fb_pixels != nullptr) {
+        fb_pixels->setPixel(x, y, qRgb(r, g, b));
+        update();
+    }
+}
+
+void LcdDisplayView::paintEvent(QPaintEvent *event) {
+    if (fb_pixels == nullptr)
+        return Super::paintEvent(event);
+    if (fb_pixels->width() == 0)
+        return Super::paintEvent(event);
+
+    QPainter painter(this);
+    QSize widgetSize = rect().size();
+    const auto newHeight = widgetSize.width() * fb_pixels->height() / fb_pixels->width();
+    if(newHeight <= widgetSize.height())
+        widgetSize.setHeight(newHeight);
+    else
+       widgetSize.setWidth(widgetSize.height() * fb_pixels->width() / fb_pixels->height());
+    painter.drawImage(rect(), fb_pixels->scaled(widgetSize));
+}
+