gralloc: RGB565 framebuffer format

Change-Id: I17dcc28b8bb78a74f227d5e1edcf82e6f69ba242
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

1 files changed, 36 insertions, 1 deletions

diff --git a/modules/gralloc/framebuffer.cpp b/modules/gralloc/framebuffer.cpp
index 326f2ae..4de1145 100644
--- a/modules/gralloc/framebuffer.cpp
+++ b/modules/gralloc/framebuffer.cpp
@@ -43,7 +43,7 @@
 /*****************************************************************************/
 
 // numbers of buffers for page flipping
-#define NUM_BUFFERS 2
+#define NUM_BUFFERS 1
 
 
 enum {
@@ -132,6 +132,39 @@ static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
 
 /*****************************************************************************/
 
+void configFrameBuffer(int fd)
+{
+	struct fb_var_screeninfo info;
+
+	if (ioctl(fd, FBIOGET_VSCREENINFO, &info) < 0) {
+		ALOGE("failed to get fb info");
+		return;
+	}
+
+	info.xoffset = 0;
+	info.yoffset = 0;
+
+	info.xres_virtual = info.xres;
+	info.yres_virtual = info.yres;
+
+	info.nonstd = 0;
+
+	info.red.offset = 0;
+	info.red.length = 5;
+	info.green.offset = 5;
+	info.green.length = 6;
+	info.blue.offset = 11;
+	info.blue.length = 5;
+	info.transp.offset = 0;
+	info.transp.length = 0;
+	info.bits_per_pixel = 16;
+
+	if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) < 0) {
+		ALOGE("failed to put fb info");
+		return;
+	}
+}
+
 int mapFrameBufferLocked(struct private_module_t* module)
 {
     // already initialized...
@@ -156,6 +189,8 @@ int mapFrameBufferLocked(struct private_module_t* module)
     if (fd < 0)
         return -errno;
 
+    configFrameBuffer(fd);
+
     struct fb_fix_screeninfo finfo;
     if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
         return -errno;