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add android-specific tweaks to vary the amount of tmp ram allocated

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git-svn-id: http://skia.googlecode.com/svn/trunk@390 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@android.com 2009-10-19 15:51:15 +00:00
parent 878999965b
commit 12d1625e27
1 changed files with 27 additions and 0 deletions
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27
src/images/SkImageDecoder_libjpeg.cpp
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@ -29,6 +29,13 @@ extern "C" {
#include "jerror.h"
}
#ifdef ANDROID
#include <cutils/properties.h>
// Key to lookup the size of memory buffer set in system property
static const char KEY_MEM_CAP[] = "ro.media.dec.jpeg.memcap";
#endif
// this enables timing code to report milliseconds for an encode
//#define TIME_ENCODE
//#define TIME_DECODE
@ -191,6 +198,22 @@ static boolean skmem_resync_to_restart(j_decompress_ptr cinfo, int desired) {
static void skmem_term_source(j_decompress_ptr /*cinfo*/) {}
#ifdef ANDROID
/* Check if the memory cap property is set.
If so, use the memory size for jpeg decode.
*/
static void overwrite_mem_buffer_size(j_decompress_ptr cinfo) {
int len = 0;
char value[PROPERTY_VALUE_MAX];
int memCap;
len = property_get(KEY_MEM_CAP, value, "");
if (len > 0 && sscanf(value, "%d", &memCap) == 1) {
cinfo->mem->max_memory_to_use = memCap;
}
}
#endif
///////////////////////////////////////////////////////////////////////////////
sk_source_mgr::sk_source_mgr(SkStream* stream, SkImageDecoder* decoder) : fStream(stream) {
@ -286,6 +309,10 @@ bool SkJPEGImageDecoder::onDecode(SkStream* stream, SkBitmap* bm,
jpeg_create_decompress(&cinfo);
autoClean.set(&cinfo);
#ifdef ANDROID
overwrite_mem_buffer_size(&cinfo);
#endif
//jpeg_stdio_src(&cinfo, file);
cinfo.src = &sk_stream;