Brooklyn/userland/interface/khronos/ext/egl_khr_lock_surface_client.c

/*
Copyright (c) 2012, Broadcom Europe Ltd
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#define EGL_EGLEXT_PROTOTYPES /* we want the prototypes so the compiler will check that the signatures match */

#include "interface/khronos/common/khrn_client_mangle.h"

#include "interface/khronos/common/khrn_int_common.h"
#include "interface/khronos/include/EGL/egl.h"
#include "interface/khronos/include/EGL/eglext.h"
#include "interface/khronos/common/khrn_client.h"
#include "interface/khronos/common/khrn_client_rpc.h"
#include "interface/khronos/egl/egl_client_config.h"
#ifdef RPC_DIRECT
#include "interface/khronos/egl/egl_int_impl.h"
#endif
#include <assert.h>

static bool lock_surface_check_attribs(const EGLint *attrib_list, bool *preserve_pixels, uint32_t *lock_usage_hint)
{
   if (!attrib_list)
      return EGL_TRUE;

   while (1) {
      int name = *attrib_list++;
      if (name == EGL_NONE)
         return EGL_TRUE;
      else {
         int value = *attrib_list++;
         switch (name) {
         case EGL_MAP_PRESERVE_PIXELS_KHR:
            *preserve_pixels = value ? true : false;
            break;
         case EGL_LOCK_USAGE_HINT_KHR:
            if (value & ~(EGL_READ_SURFACE_BIT_KHR | EGL_WRITE_SURFACE_BIT_KHR))
               return EGL_FALSE;

            *lock_usage_hint = value;
            break;
         default:
            return EGL_FALSE;
         }
      }
   }
}

EGLAPI EGLBoolean EGLAPIENTRY eglLockSurfaceKHR (EGLDisplay dpy, EGLSurface surf, const EGLint *attrib_list)
{
   CLIENT_THREAD_STATE_T *thread = CLIENT_GET_THREAD_STATE();
   EGLBoolean result;

   CLIENT_LOCK();

   {
      CLIENT_PROCESS_STATE_T *process = client_egl_get_process_state(thread, dpy, EGL_TRUE);

      if (!process)
         result = 0;
      else {
         EGL_SURFACE_T *surface = client_egl_get_surface(thread, process, surf);

         if (surface) {
            bool preserve_pixels = false;
            uint32_t lock_usage_hint = EGL_READ_SURFACE_BIT_KHR | EGL_WRITE_SURFACE_BIT_KHR;   /* we completely ignore this */

            assert(!surface->is_locked);

            if (!lock_surface_check_attribs(attrib_list, &preserve_pixels, &lock_usage_hint)) {
               thread->error = EGL_BAD_ATTRIBUTE;
               result = EGL_FALSE;
            } else if (!egl_config_is_lockable((int)(intptr_t)surface->config - 1)) {
               /* Only lockable surfaces can be locked (obviously) */
               thread->error = EGL_BAD_ACCESS;
               result = EGL_FALSE;
            } else if (surface->context_binding_count) {
               /* Cannot lock a surface if it is bound to a context */
               thread->error = EGL_BAD_ACCESS;
               result = EGL_FALSE;
            } else if (preserve_pixels) {
               /* TODO: we don't need to support this. What error should we return? */
               thread->error = EGL_BAD_ATTRIBUTE;
               return EGL_FALSE;
            } else {
               /* Don't allocate the buffer here. This happens during "mapping", in eglQuerySurface. */
               surface->mapped_buffer = 0;
               surface->is_locked = true;
               thread->error = EGL_SUCCESS;
               result = EGL_TRUE;
            }
         } else
            result = EGL_FALSE;
      }
   }

   CLIENT_UNLOCK();
   return result;
}

EGLAPI EGLBoolean EGLAPIENTRY eglUnlockSurfaceKHR (EGLDisplay dpy, EGLSurface surf)
{
   CLIENT_THREAD_STATE_T *thread = CLIENT_GET_THREAD_STATE();
   EGLBoolean result;

   CLIENT_LOCK();

   {
      CLIENT_PROCESS_STATE_T *process = client_egl_get_process_state(thread, dpy, EGL_TRUE);

      if (!process)
         result = 0;
      else {
         EGL_SURFACE_T *surface = client_egl_get_locked_surface(thread, process, surf);

         if (!surface) {
            result = EGL_FALSE;
         } else if (!surface->is_locked) {
            thread->error = EGL_BAD_ACCESS;
            result = EGL_FALSE;
         } else {
            assert(surface->is_locked);
            if (surface->mapped_buffer) {
               KHRN_IMAGE_FORMAT_T format = egl_config_get_mapped_format((int)(intptr_t)surface->config - 1);
               uint32_t stride = khrn_image_get_stride(format, surface->width);
               int lines, offset, height;

               lines = KHDISPATCH_WORKSPACE_SIZE / stride;
               offset = 0;
               height = surface->height;

               while (height > 0) {
                  int batch = _min(lines, height);
#ifndef RPC_DIRECT
                  uint32_t len = batch * stride;
#endif

                  RPC_CALL7_IN_BULK(eglIntSetColorData_impl,
                     thread,
                     EGLINTSETCOLORDATA_ID,
                     surface->serverbuffer,
                     format,
                     surface->width,
                     batch,
                     stride,
                     offset,
                     (const char *)surface->mapped_buffer + offset * stride,
                     len);

                  offset += batch;
                  height -= batch;
               }

               khrn_platform_free(surface->mapped_buffer);
            }

            surface->mapped_buffer = 0;
            surface->is_locked = false;
            thread->error = EGL_SUCCESS;
            result = EGL_TRUE;
         }
      }
   }

   CLIENT_UNLOCK();
   return result;
}