[home] Added support for a wallpaper in a special format (.obm)

escher/src/background_view.cpp

@@ -0,0 +1,65 @@
+#include <escher/background_view.h>
+#include <ion.h>
+#include <kandinsky/ion_context.h>
+#include <escher/palette.h>//AND THIS
+#include "apps/home/controller.h"
+#ifdef HOME_DISPLAY_EXTERNALS
+#include "apps/external/external_icon.h"
+#include "apps/external/archive.h"
+#include <string.h>
+#endif
+
+//To store the Omega backgrounds, we use a specific file in the "OmegaBitMap" format.
+//Here is its header
+struct OBMHeader
+{
+  uint32_t signature; //Normally it is 32145
+  int32_t width;
+  int32_t height;
+  const KDColor image_data;
+};
+
+BackgroundView::BackgroundView():
+  m_data(nullptr),
+  m_isDataValid(false),
+  m_defaultColor(Palette::BackgroundHard)
+{
+
+}
+
+void BackgroundView::setBackgroundImage(const uint8_t * data) {
+  m_data = data;
+  updateDataValidity();
+  markRectAsDirty(bounds());
+}
+
+void BackgroundView::setDefaultColor(KDColor defaultColor) {
+  m_defaultColor = defaultColor;
+}
+
+void BackgroundView::drawRect(KDContext * ctx, KDRect rect) const {
+  if(!m_isDataValid) {
+    ctx->fillRect(rect, m_defaultColor);
+    return;
+  }
+
+  OBMHeader* h = (OBMHeader*)m_data;
+  
+  int yrectToImage = ctx->origin().y() - m_frame.y();
+  int xrectToImage = ctx->origin().x() - m_frame.x();
+
+  for (int line = rect.y(); line <= rect.bottom(); line++) {
+    int offset = ((line + yrectToImage) * h->width) + (rect.x() + xrectToImage);
+    ctx->fillRectWithPixels(KDRect(rect.x(), line, rect.width(), 1), &(h->image_data) + offset, nullptr);
+  }
+}
+
+void BackgroundView::updateDataValidity() {
+  if(m_data == nullptr || KDIonContext::sharedContext()->gammaEnabled) {
+    m_isDataValid = false;
+    return;
+  }
+  
+  OBMHeader* h = (OBMHeader*)m_data;
+  m_isDataValid = h->signature==466512775 && h->height==m_frame.height() && h->width==m_frame.width();
+}