[Mesa-dev] [PATCH 7/8] android: support creating texture from gralloc buffer

[Wu Zhen]

From: WuZhen <wuzhen at jidemail.com>

Change-Id: Ifabf40fe94007f73171a89b23545002707817053
Reviewed-by: Mauro Rossi <issor.oruam at gmail.com>
Reviewed-by: Chih-Wei Huang <cwhuang at linux.org.tw>
---
 src/gallium/targets/dri/Android.mk        |  1 +
 src/gallium/winsys/sw/dri/dri_sw_winsys.c | 65 +++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/src/gallium/targets/dri/Android.mk b/src/gallium/targets/dri/Android.mk
index 5a71867381..02b3f76f09 100644
--- a/src/gallium/targets/dri/Android.mk
+++ b/src/gallium/targets/dri/Android.mk
@@ -43,6 +43,7 @@ LOCAL_SHARED_LIBRARIES := \
 	liblog \
 	libglapi \
 	libexpat \
+	libhardware \
 
 ifneq ($(filter freedreno,$(MESA_GPU_DRIVERS)),)
 LOCAL_CFLAGS += -DGALLIUM_FREEDRENO
diff --git a/src/gallium/winsys/sw/dri/dri_sw_winsys.c b/src/gallium/winsys/sw/dri/dri_sw_winsys.c
index 94d5092405..bbc7f08f5a 100644
--- a/src/gallium/winsys/sw/dri/dri_sw_winsys.c
+++ b/src/gallium/winsys/sw/dri/dri_sw_winsys.c
@@ -34,8 +34,15 @@
 #include "util/u_memory.h"
 
 #include "state_tracker/sw_winsys.h"
+#include "state_tracker/drm_driver.h"
 #include "dri_sw_winsys.h"
 
+#ifdef HAVE_ANDROID_PLATFORM
+#include <system/graphics.h>
+#include <system/window.h>
+#include <hardware/gralloc.h>
+#endif
+
 
 struct dri_sw_displaytarget
 {
@@ -45,11 +52,31 @@ struct dri_sw_displaytarget
    unsigned stride;
 
    unsigned map_flags;
+#ifdef HAVE_ANDROID_PLATFORM
+   struct ANativeWindowBuffer *androidBuffer;
+#endif
    void *data;
    void *mapped;
    const void *front_private;
 };
 
+#ifdef HAVE_ANDROID_PLATFORM
+const struct gralloc_module_t* get_gralloc()
+{
+   static const struct gralloc_module_t* gr_module = NULL;
+   const hw_module_t *mod;
+   int err;
+
+   if (!gr_module) {
+      err =  hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &mod);
+      if (!err) {
+         gr_module = (gralloc_module_t *) mod;
+      }
+   }
+   return gr_module;
+}
+#endif
+
 struct dri_sw_winsys
 {
    struct sw_winsys base;
@@ -125,6 +152,12 @@ dri_sw_displaytarget_destroy(struct sw_winsys *ws,
 {
    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 
+#ifdef HAVE_ANDROID_PLATFORM
+   if (dri_sw_dt->androidBuffer) {
+      dri_sw_dt->androidBuffer->common.decRef(&dri_sw_dt->androidBuffer->common);
+   }
+#endif
+
    align_free(dri_sw_dt->data);
 
    FREE(dri_sw_dt);
@@ -136,6 +169,17 @@ dri_sw_displaytarget_map(struct sw_winsys *ws,
                          unsigned flags)
 {
    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
+#ifdef HAVE_ANDROID_PLATFORM
+   if (dri_sw_dt->androidBuffer) {
+      if (!get_gralloc()->lock(get_gralloc(), dri_sw_dt->androidBuffer->handle,
+                              GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
+                              0, 0, dri_sw_dt->androidBuffer->width, dri_sw_dt->androidBuffer->height,
+                              (void**)&dri_sw_dt->mapped)) {
+         dri_sw_dt->map_flags = flags;
+         return dri_sw_dt->mapped;
+      }
+   }
+#endif
    dri_sw_dt->mapped = dri_sw_dt->data;
 
    if (dri_sw_dt->front_private && (flags & PIPE_TRANSFER_READ)) {
@@ -156,6 +200,11 @@ dri_sw_displaytarget_unmap(struct sw_winsys *ws,
       dri_sw_ws->lf->put_image2((void *)dri_sw_dt->front_private, dri_sw_dt->data, 0, 0, dri_sw_dt->width, dri_sw_dt->height, dri_sw_dt->stride);
    }
    dri_sw_dt->map_flags = 0;
+#ifdef HAVE_ANDROID_PLATFORM
+   if (dri_sw_dt->androidBuffer) {
+      get_gralloc()->unlock(get_gralloc(), dri_sw_dt->androidBuffer->handle);
+   }
+#endif
    dri_sw_dt->mapped = NULL;
 }
 
@@ -165,6 +214,22 @@ dri_sw_displaytarget_from_handle(struct sw_winsys *winsys,
                                  struct winsys_handle *whandle,
                                  unsigned *stride)
 {
+#ifdef HAVE_ANDROID_PLATFORM
+   struct dri_sw_displaytarget *dri_sw_dt;
+
+   if (whandle->type == DRM_API_HANDLE_TYPE_BUFFER) {
+      dri_sw_dt = CALLOC_STRUCT(dri_sw_displaytarget);
+      dri_sw_dt->width = templ->width0;
+      dri_sw_dt->height = templ->height0;
+      dri_sw_dt->androidBuffer = whandle->external_buffer;
+      dri_sw_dt->stride = whandle->stride;
+
+      dri_sw_dt->androidBuffer->common.incRef(&dri_sw_dt->androidBuffer->common);
+      *stride = dri_sw_dt->stride;
+
+      return dri_sw_dt;
+   }
+#endif
    assert(0);
    return NULL;
 }
-- 
2.11.0