From 9584b01c03c63db9b918b6493c9a3c41287ad99c Mon Sep 17 00:00:00 2001
From: Chris Michael <cp.michael@samsung.com>
Date: Thu, 2 Jan 2014 08:00:00 +0000
Subject: [PATCH] Add ecore_drm_fb file for framebuffer functions

Signed-off-by: Chris Michael <cp.michael@samsung.com>
---
 src/lib/ecore_drm/ecore_drm_fb.c | 83 ++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/lib/ecore_drm/ecore_drm_fb.c

diff --git a/src/lib/ecore_drm/ecore_drm_fb.c b/src/lib/ecore_drm/ecore_drm_fb.c
new file mode 100644
index 0000000000..fb96c13767
--- /dev/null
+++ b/src/lib/ecore_drm/ecore_drm_fb.c
@@ -0,0 +1,83 @@
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "ecore_drm_private.h"
+
+Ecore_Drm_Fb *
+_ecore_drm_fb_create(Ecore_Drm_Device *dev, int width, int height)
+{
+   Ecore_Drm_Fb *fb;
+   struct drm_mode_create_dumb carg;
+   struct drm_mode_destroy_dumb darg;
+   struct drm_mode_map_dumb marg;
+
+   if (!(fb = calloc(1, sizeof(Ecore_Drm_Fb)))) return NULL;
+
+   memset(&carg, 0, sizeof(struct drm_mode_create_dumb));
+
+   carg.bpp = 32; // FIXME: Hard-coded depth
+   carg.width = width;
+   carg.height = height;
+
+   if (drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &carg))
+     {
+        ERR("Could not create dumb framebuffer: %m");
+        goto create_err;
+     }
+
+   fb->hdl = carg.handle;
+   fb->stride = carg.pitch;
+   fb->size = carg.size;
+   fb->fd = dev->drm.fd;
+
+   if (drmModeAddFB(dev->drm.fd, width, height, 24, 32, 
+                    fb->stride, fb->hdl, &fb->id))
+     {
+        ERR("Could not add framebuffer: %m");
+        goto add_err;
+     }
+
+   memset(&marg, 0, sizeof(struct drm_mode_map_dumb));
+   marg.handle = fb->hdl;
+   if (drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_MAP_DUMB, &marg))
+     {
+        ERR("Could not map framebuffer: %m");
+        goto map_err;
+     }
+
+   fb->mmap = 
+     mmap(0, fb->size, PROT_WRITE, MAP_SHARED, dev->drm.fd, marg.offset);
+   if (fb->mmap == MAP_FAILED)
+     {
+        ERR("Could not mmap framebuffer space: %m");
+        goto map_err;
+     }
+
+   return fb;
+
+map_err:
+   drmModeRmFB(fb->fd, fb->id);
+add_err:
+   memset(&darg, 0, sizeof(struct drm_mode_destroy_dumb));
+   darg.handle = fb->hdl;
+   drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &darg);
+create_err:
+   free(fb);
+   return NULL;
+}
+
+void 
+_ecore_drm_fb_destroy(Ecore_Drm_Fb *fb)
+{
+   struct drm_mode_destroy_dumb darg;
+
+   if ((!fb) || (!fb->mmap)) return;
+
+   if (fb->id) drmModeRmFB(fb->fd, fb->id);
+   munmap(fb->mmap, fb->size);
+   memset(&darg, 0, sizeof(struct drm_mode_destroy_dumb));
+   darg.handle = fb->hdl;
+   drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &darg);
+   free(fb);
+}