*shower* :-)

[lectures/dfb-slides.git] / render.c

diff --git a/render.c b/render.c
new file mode 100644 (file)
index 0000000..883693a
--- /dev/null
+++ b/render.c
@@ -0,0 +1,230 @@
+/* DirectFB presentation app
+ *
+ * Copyright (C) 2001  convergence integrated media
+ * Authors: Sven Neumann <sven@convergence.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <directfb.h>
+
+#include <glib-object.h>
+
+#include "apptypes.h"
+
+#include "action.h"
+#include "context.h"
+#include "header.h"
+#include "image.h"
+#include "listitem.h"
+#include "render.h"
+#include "resources.h"
+#include "slides.h"
+#include "slide.h"
+#include "text.h"
+#include "video.h"
+
+
+static void render_bullet (Context *context,
+                           gint    *offx,
+                           gint     offy);
+
+void
+render_bg (Context *context)
+{
+  guchar *color;
+  
+  color = context_get_bgcolor (context);
+  context->surface->SetColor (context->surface, 
+                              color[0], color[1], color[2], color[3]);
+  context->surface->FillRectangle (context->surface, 
+                                   0, 0, context->w, context->h);
+}
+
+void
+render_bgimage (Context *context)
+{
+  gchar *image;
+
+  image = context_get_bgimage (context);
+  if (image)
+    {
+      IDirectFBSurface *src;
+      gint w, h;
+
+      src = resources_get_surface (image);
+      if (!src)
+        return;
+
+      src->GetSize (src, &w, &h);
+          
+      if (w == context->w && h == context->h)
+        {
+          context->surface->Blit (context->surface, src, NULL, 0, 0);
+        }     
+      else
+        {
+          DFBRectangle rect = { 0, 0, context->w, context->h };
+          
+          context->surface->StretchBlit (context->surface, 
+                                         src, NULL, &rect);
+        }
+      
+      resources_release_surface (image);
+    }
+}
+
+void
+render_image (Context *context,
+              Image   *image)
+{
+  Item                  *item;
+  IDirectFBSurface      *src; 
+  DFBRectangle           rect;
+  DFBSurfacePixelFormat  format;
+  gint w, h, ratio;
+
+  if (IS_VIDEO (image))
+    {
+      Video *video;
+
+      video = (Video *) image;
+      video->dest_surface = context->surface;
+
+      return;
+    }
+
+  src = resources_get_surface (ITEM (image)->value);
+
+  if (!src)
+    return;
+
+  src->GetSize (src, &w, &h);
+  src->GetPixelFormat (src, &format);
+
+  if (format == DSPF_ARGB)
+    context->surface->SetBlittingFlags (context->surface, 
+                                        DSBLIT_BLEND_ALPHACHANNEL);
+
+  ratio = (w * 1024) / h;
+  item = (Item *) image;
+  
+  rect.w = item->flags & WIDTH ? 
+    item->width : (item->flags & HEIGHT ? (item->height * ratio) / 1024 : w);
+  rect.h = item->flags & HEIGHT ? 
+    item->height : (item->flags & WIDTH ? (item->width * 1024) / ratio : h);
+
+  rect.x = item->flags & XOFFSET ? item->x : 0;
+  rect.y = item->flags & YOFFSET ? item->y : 0;
+  
+  if (format == DSPF_ARGB)
+    context->surface->SetBlittingFlags (context->surface, 
+                                        DSBLIT_BLEND_ALPHACHANNEL);
+
+  if (w == rect.w || h == rect.h)
+    context->surface->Blit (context->surface, src, NULL, rect.x, rect.y);
+  else
+    context->surface->StretchBlit (context->surface, src, NULL, &rect);
+
+  context->surface->SetBlittingFlags (context->surface, DSBLIT_NOFX);
+
+  resources_release_surface (ITEM (image)->value);
+}
+
+void
+render_text (Context *context,
+             Text    *text,
+             gint    *offy)
+{
+  guchar        *color;
+  gchar         *face;
+  gint           size;
+  gint           offx;
+  IDirectFBFont *font;
+
+  context_push (context, (Item *) text);
+
+  color = context_get_fgcolor (context);
+  context->surface->SetColor (context->surface, 
+                              color[0], color[1], color[2], color[3]);
+
+  face = context_get_face (context);
+  size = context_get_size (context);
+
+  g_return_if_fail (face != NULL);
+  g_return_if_fail (size > 0);
+
+  offx = 10;
+
+  if (IS_HEADER (text))
+    size = (size * 64) / 52;
+  else if (IS_LISTITEM (text))
+    size = (size * 48) / 64;
+  else
+    offx+=40;
+
+  font = resources_get_font (face, size);
+  
+  if (IS_LISTITEM (text))
+    {
+      gint asc;
+
+      font->GetAscender (font, &asc);
+      render_bullet (context, &offx, *offy + asc);
+    }
+
+  context->surface->SetFont (context->surface, font);
+  context->surface->DrawString (context->surface, 
+                                ITEM (text)->value, -1,
+                                offx, *offy, DSTF_TOPLEFT);
+
+  *offy += (size * 64) / 48;
+
+  context_pop (context, (Item *) text);
+}
+
+static void
+render_bullet (Context *context,
+               gint    *offx,
+               gint     offy)
+{
+  IDirectFBSurface *src;
+  gchar            *image;
+  gint              w, h;
+
+  image = context_get_bullet (context);
+  if (image)
+    {
+      src = resources_get_surface (image);
+      if (!src)
+        return;
+
+      src->GetSize (src, &w, &h);
+
+      context->surface->SetBlittingFlags (context->surface, 
+                                          DSBLIT_BLEND_ALPHACHANNEL);
+      context->surface->Blit (context->surface, 
+                              src, NULL, *offx + 20, offy - h);
+      context->surface->SetBlittingFlags (context->surface, DSBLIT_NOFX);
+
+      resources_release_surface (image);
+
+      *offx += w + 24;
+    }
+}