gralloc/format_chooser.cpp

   1 /*
   2  * Copyright (C) 2014 ARM Limited. All rights reserved.
   3  *
   4  * Copyright (C) 2008 The Android Open Source Project
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *        http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 #include <stdlib.h>
  19 #include <hardware/hardware.h>
  20 #include <cutils/log.h>
  21 #include <cutils/properties.h>
  22 #include <hardware/gralloc.h>
  23 #include "format_chooser.h"
  24
  25 #define FBT (GRALLOC_USAGE_HW_FB | GRALLOC_USAGE_HW_RENDER | GRALLOC_USAGE_HW_COMPOSER)
  26 #define GENERAL_UI (GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_HW_COMPOSER)
  27
  28 /* It's for compression check format, width, usage*/
  29 int check_for_compression(int w, int h, int format, int usage)
  30 {
  31         char value[256];
  32         int afbc_prop;
  33
  34         property_get("ddk.set.afbc", value, "0");
  35         afbc_prop = atoi(value);
  36
  37         switch(format)
  38         {
  39                 case HAL_PIXEL_FORMAT_RGBA_8888:
  40                 case HAL_PIXEL_FORMAT_BGRA_8888:
  41                 case HAL_PIXEL_FORMAT_RGB_888:
  42                 case HAL_PIXEL_FORMAT_RGBX_8888:
  43                 case HAL_PIXEL_FORMAT_RGB_565:
  44                 case HAL_PIXEL_FORMAT_YV12:
  45                 {
  46                         if(afbc_prop == 0)
  47                                 return 0;
  48                         if (w % 16 != 0) /* width isn't 16 pixel alignment */
  49                                 return 0;
  50                         if ((w <= 144) || (h <= 144)) /* min restriction for performance */
  51                                 return 0;
  52                         if ((usage & GRALLOC_USAGE_SW_READ_MASK) == GRALLOC_USAGE_SW_READ_OFTEN)
  53                                 return 0;
  54                         if ((usage & FBT) || (usage & GENERAL_UI)) /*only support FBT and General UI */
  55                                 return 1;
  56                         else
  57                                 return 0;
  58
  59                         break;
  60                 }
  61                 default:
  62                         return 0;
  63         }
  64
  65 }
  66
  67 uint64_t gralloc_select_format(int req_format, int usage, int is_compressible)
  68 {
  69         uint64_t new_format = req_format;
  70
  71         if( req_format == 0 )
  72         {
  73                 return 0;
  74         }
  75
  76         if( (usage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK)) != 0 ||
  77              usage == 0 )
  78         {
  79                 return new_format;
  80         }
  81
  82         if( is_compressible == 0)
  83         {
  84                 return new_format;
  85         }
  86 #if 0
  87         /* This is currently a limitation with the display and will be removed eventually
  88          *  We can't allocate fbdev framebuffer buffers in AFBC format */
  89         if( usage & GRALLOC_USAGE_HW_FB )
  90         {
  91                 return new_format;
  92         }
  93 #endif
  94         new_format |= GRALLOC_ARM_INTFMT_AFBC;
  95
  96         ALOGD("Returned iterated format: 0x%llX", new_format);
  97
  98         return new_format;
  99 }