1 files changed, 92 insertions, 0 deletions

diff --git a/libraries/evas/src/modules/engines/software_ddraw/evas_ddraw_buffer.c b/libraries/evas/src/modules/engines/software_ddraw/evas_ddraw_buffer.c
new file mode 100644
index 0000000..7ef9211
--- /dev/null
+++ b/libraries/evas/src/modules/engines/software_ddraw/evas_ddraw_buffer.c
@@ -0,0 +1,92 @@
+#include <string.h>
+
+#include "evas_common.h"
+#include "evas_engine.h"
+
+
+DD_Output_Buffer *
+evas_software_ddraw_output_buffer_new(int   depth,
+                                      int   width,
+                                      int   height,
+                                      void *data)
+{
+   DD_Output_Buffer *ddob;
+
+   ddob = calloc(1, sizeof(DD_Output_Buffer));
+   if (!ddob) return NULL;
+
+   ddob->data = data;
+   ddob->depth = depth;
+   ddob->width = width;
+   ddob->height = height;
+   ddob->pitch = width * depth / 8;
+   ddob->psize = ddob->pitch * height;
+
+   if (!ddob->data)
+     {
+        ddob->data = malloc(ddob->pitch * height);
+        if (!ddob->data)
+          {
+            free(ddob);
+            return NULL;
+          }
+     }
+
+   return ddob;
+}
+
+void
+evas_software_ddraw_output_buffer_free(DD_Output_Buffer *ddob)
+{
+   if (ddob->data) free(ddob->data);
+   free(ddob);
+}
+
+void
+evas_software_ddraw_output_buffer_paste(DD_Output_Buffer *ddob,
+                                        void             *ddraw_data,
+                                        int               ddraw_width,
+                                        int               ddraw_height,
+                                        int               ddraw_pitch,
+                                        int               ddraw_depth,
+                                        int               x,
+                                        int               y)
+{
+   DATA8 *dd_data;
+   DATA8 *evas_data;
+   int    width;
+   int    height;
+   int    pitch;
+   int    j;
+
+   if ((x >= ddraw_width) || (y >= ddraw_height))
+     return;
+
+   /* compute the size of the data to copy on the back surface */
+   width = ((x + ddob->width) > ddraw_width)
+     ? ddraw_width - x
+     : ddob->width;
+   height = ((y + ddob->height) > ddraw_height)
+     ? ddraw_height - y
+     : ddob->height;
+   pitch = width * ddob->depth / 8;
+
+   dd_data = (DATA8 *)ddraw_data + y * ddraw_pitch + x * ddraw_depth;
+   evas_data = (unsigned char *)ddob->data;
+   for (j = 0; j < height; j++, evas_data += ddob->pitch, dd_data += ddraw_pitch)
+     memcpy(dd_data, evas_data, pitch);
+}
+
+DATA8 *
+evas_software_ddraw_output_buffer_data(DD_Output_Buffer *ddob,
+                                       int              *bytes_per_line_ret)
+{
+   if (bytes_per_line_ret) *bytes_per_line_ret = ddob->pitch;
+   return ddob->data;
+}
+
+int
+evas_software_ddraw_output_buffer_depth(DD_Output_Buffer *ddob)
+{
+   return ddob->depth;
+}