+++ /dev/null
-# This file is part of NIT (http://www.nitlanguage.org).
-#
-# Copyright 2012-2014 Alexis Laferrière <alexis.laf@xymus.net>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Implements the `mnit::assets` services with a wraper around the filesystem
-# API provided by the Android ndk.
-#
-# This module relies heavily on 3 C libraries:
-# * The Android ndk
-# * zlib (which is included in the Android ndk)
-# * libpng which must be provided by the Nit compilation framework
-module android_assets is ldflags "-lz"
-
-import mnit
-import android_app
-
-in "C header" `{
- #include <png.h>
- #include <zlib.h>
-`}
-
-in "C" `{
- void mnit_android_png_read_data(png_structp png_ptr,
- png_bytep data, png_size_t length)
- {
- struct AAsset *self = png_get_io_ptr(png_ptr);
- int read = AAsset_read(self, data, length);
- }
- void mnit_android_png_error_fn(png_structp png_ptr,
- png_const_charp error_msg)
- {
- LOGW("libpng error: %s", error_msg);
- }
- void mnit_android_png_warning_fn(png_structp png_ptr,
- png_const_charp warning_msg)
- {
- LOGW("libpng warning: %s", warning_msg);
- }
-`}
-
-extern class AndroidAsset in "C" `{struct AAsset*`}
-
- fun read(count: Int): nullable String import String.as nullable, NativeString.to_s `{
- char *buffer = malloc(sizeof(char) * (count+1));
- int read = AAsset_read(self, buffer, count);
- if (read != count)
- return null_String();
- else
- {
- buffer[count] = '\0';
- return String_as_nullable(NativeString_to_s(buffer));
- }
- `}
-
- fun length: Int `{
- return AAsset_getLength(self);
- `}
-
- fun to_fd: Int `{
- off_t start;
- off_t length;
- int fd = AAsset_openFileDescriptor(self, &start, &length);
- return fd;
- `}
-
- fun close `{
- AAsset_close(self);
- `}
-end
-
-redef class App
- redef fun try_loading_asset(path)
- do
- var a = load_asset_from_apk(path)
- if a != null then
- if path.file_extension == "png" then
- var png = new Opengles1Image.from_android_asset(a)
- a.close
- return png
- else if path.file_extension == "txt" then
- var len = a.length
- var txt = a.read(len)
- return txt
- end
- else
- print "didn't get asset {path}"
- end
-
- return null
- end
-
- protected fun load_asset_from_apk(path: String): nullable AndroidAsset import String.to_cstring, AndroidAsset.as nullable, native_app_glue `{
- struct android_app *native_app_glue = App_native_app_glue(self);
- struct AAsset* a = AAssetManager_open(native_app_glue->activity->assetManager, String_to_cstring(path), AASSET_MODE_BUFFER);
- if (a == NULL)
- {
- LOGW("nit d g a");
- return null_AndroidAsset();
- }
- else
- {
- return AndroidAsset_as_nullable(a);
- }
- `}
-end
-
-redef class Opengles1Image
- # Read a png from a zipped stream
- new from_android_asset(asset: AndroidAsset) import Int.next_pow `{
- struct mnit_opengles_Texture *self = NULL;
-
- png_structp png_ptr = NULL;
- png_infop info_ptr = NULL;
-
- png_uint_32 width, height;
- int depth, color_type;
- int has_alpha;
-
- unsigned int row_bytes;
- png_bytepp row_pointers = NULL;
- unsigned char *pixels = NULL;
- unsigned int i;
-
- png_uint_32 width_pow2, height_pow2;
- unsigned int row_bytes_pow2;
-
- unsigned char sig[8];
- int sig_read = AAsset_read(asset, sig, 8);
- if (png_sig_cmp(sig, 0, sig_read)) {
- LOGW("invalide png signature");
- return NULL;
- }
-
- png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (png_ptr == NULL) {
- LOGW("png_create_read_struct failed");
- goto close_stream;
- }
- png_set_error_fn(png_ptr, NULL, mnit_android_png_error_fn, mnit_android_png_warning_fn);
-
- info_ptr = png_create_info_struct(png_ptr);
- if (info_ptr == NULL) {
- LOGW("png_create_info_struct failed");
- goto close_png_ptr;
- }
-
- if (setjmp(png_jmpbuf(png_ptr))) {
- LOGW("reading png file failed");
- goto close_png_ptr;
- }
-
- png_set_read_fn(png_ptr, (void*)asset, mnit_android_png_read_data);
-
- png_set_sig_bytes(png_ptr, sig_read);
-
- png_read_info(png_ptr, info_ptr);
-
- png_get_IHDR( png_ptr, info_ptr, &width, &height,
- &depth, &color_type, NULL, NULL, NULL);
- has_alpha = color_type & PNG_COLOR_MASK_ALPHA;
-
- // If we get gray and alpha only, standardize the format of the pixels.
- // GA is not supported by OpenGL ES 1.
- if (!(color_type & PNG_COLOR_MASK_COLOR)) {
- png_set_gray_to_rgb(png_ptr);
- png_set_palette_to_rgb(png_ptr);
- png_read_update_info(png_ptr, info_ptr);
- }
-
- width_pow2 = Int_next_pow(width, 2);
- height_pow2 = Int_next_pow(height, 2);
-
- LOGW("Loading image of w: %i, h: %i, w2: %d, h2: %d",
- width, height, width_pow2, height_pow2);
-
- row_bytes = png_get_rowbytes(png_ptr, info_ptr);
- row_bytes_pow2 = row_bytes * width_pow2 / width;
- pixels = malloc(row_bytes_pow2 * height_pow2);
- row_pointers = (png_bytep*)malloc(sizeof(png_bytep) * height_pow2);
-
- for (i=0; i<height; i++)
- row_pointers[i] = (png_byte*) malloc(row_bytes);
-
- png_read_image(png_ptr, row_pointers);
-
- for (i = 0; i < height; i++)
- memcpy(pixels + (row_bytes_pow2*i), row_pointers[i], row_bytes);
-
- self = mnit_opengles_load_image((const uint_least32_t *)pixels,
- width, height, width_pow2, height_pow2, has_alpha);
-
- // Calculate the size of the client-side memory allocated and freed
- float size = ((float)row_bytes_pow2) * height_pow2/1024.0/1024.0;
- static float total_size = 0;
- total_size += size;
- LOGI("Loaded OK %fmb out of %fmb", size, total_size);
-
- close_png_ptr:
- if (info_ptr != NULL)
- png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
- else
- png_destroy_read_struct(&png_ptr, NULL, NULL);
-
- if (pixels != NULL)
- free(pixels);
-
- if (row_pointers != NULL) {
- for (i=0; i<height; i++)
- free(row_pointers[i]);
- free(row_pointers);
- }
-
- close_stream:
- return self;
- `}
-end
-
-redef universal Int
- # The first power of `exp` greater or equal to `self`
- private fun next_pow(exp: Int): Int
- do
- var p = 1
- while p < self do p = p*exp
- return p
- end
-end
nitlanguage / nit.git / blobdiff