RemoteDrawingEngine: Reduce RP_READ_BITMAP result timeout.

[haiku.git] / src / kits / tracker / Bitmaps.cpp

/*
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this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
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of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY,
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Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
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All rights reserved.
*/

#include "Bitmaps.h"
#include "Utilities.h"

#include <Autolock.h>
#include <Bitmap.h>
#include <Debug.h>
#include <DataIO.h>
#include <File.h>
#include <IconUtils.h>
#include <String.h>
#include <SupportDefs.h>


//      #pragma mark - BImageResources


BImageResources::BImageResources(void* memAddr)
{
        image_id image = find_image(memAddr);
        image_info info;
        if (get_image_info(image, &info) == B_OK) {
#if _SUPPORTS_RESOURCES
                BFile file(&info.name[0], B_READ_ONLY);
#else
                BString name(&info.name[0]);
                name += ".rsrc";
                BFile file(name.String(), B_READ_ONLY);
#endif
                if (file.InitCheck() == B_OK)
                        fResources.SetTo(&file);
        }
}


BImageResources::~BImageResources()
{
}


const BResources*
BImageResources::ViewResources() const
{
        if (fLock.Lock() != B_OK)
                return NULL;

        return &fResources;
}


BResources*
BImageResources::ViewResources()
{
        if (fLock.Lock() != B_OK)
                return NULL;

        return &fResources;
}


status_t
BImageResources::FinishResources(BResources* res) const
{
        ASSERT(res == &fResources);
        if (res != &fResources)
                return B_BAD_VALUE;

        fLock.Unlock();

        return B_OK;
}


const void*
BImageResources::LoadResource(type_code type, int32 id,
        size_t* out_size) const
{
        // Serialize execution.
        // Looks like BResources is not really thread safe. We should
        // clean that up in the future and remove the locking from here.
        BAutolock lock(fLock);
        if (!lock.IsLocked())
                return 0;

        // Return the resource.  Because we never change the BResources
        // object, the returned data will not change until TTracker is
        // destroyed.
        return const_cast<BResources*>(&fResources)->LoadResource(type, id,
                out_size);
}


const void*
BImageResources::LoadResource(type_code type, const char* name,
        size_t* out_size) const
{
        // Serialize execution.
        BAutolock lock(fLock);
        if (!lock.IsLocked())
                return NULL;

        // Return the resource.  Because we never change the BResources
        // object, the returned data will not change until TTracker is
        // destroyed.
        return const_cast<BResources*>(&fResources)->LoadResource(type, name,
                out_size);
}


status_t
BImageResources::GetIconResource(int32 id, icon_size size,
        BBitmap* dest) const
{
        size_t length = 0;
        const void* data;

        // try to load vector icon
        data = LoadResource(B_VECTOR_ICON_TYPE, id, &length);
        if (data != NULL
                && BIconUtils::GetVectorIcon((uint8*)data, length, dest) == B_OK) {
                return B_OK;
        }

        // fall back to R5 icon
        if (size != B_LARGE_ICON && size != B_MINI_ICON)
                return B_ERROR;

        length = 0;
        data = LoadResource(size == B_LARGE_ICON ? 'ICON' : 'MICN', id, &length);

        if (data == NULL
                || length != (size_t)(size == B_LARGE_ICON ? 1024 : 256)) {
                TRESPASS();
                return B_ERROR;
        }

        if (dest->ColorSpace() != B_CMAP8) {
                return BIconUtils::ConvertFromCMAP8((uint8*)data, size, size,
                        size, dest);
        }

        dest->SetBits(data, (int32)length, 0, B_CMAP8);
        return B_OK;
}


status_t
BImageResources::GetIconResource(int32 id, const uint8** iconData,
        size_t* iconSize) const
{
        // try to load vector icon data from resources
        size_t length = 0;
        const void* data = LoadResource(B_VECTOR_ICON_TYPE, id, &length);
        if (data == NULL)
                return B_ERROR;

        *iconData = (const uint8*)data;
        *iconSize = length;

        return B_OK;
}


image_id
BImageResources::find_image(void* memAddr) const
{
        image_info info;
        int32 cookie = 0;
        while (get_next_image_info(0, &cookie, &info) == B_OK) {
                if ((info.text <= memAddr
                        && (((uint8*)info.text)+info.text_size) > memAddr)
                                || (info.data <= memAddr
                                && (((uint8*)info.data)+info.data_size) > memAddr)) {
                        // Found the image.
                        return info.id;
                }
        }

        return -1;
}


status_t
BImageResources::GetBitmapResource(type_code type, int32 id,
        BBitmap** out) const
{
        *out = NULL;

        size_t len = 0;
        const void* data = LoadResource(type, id, &len);

        if (data == NULL) {
                TRESPASS();
                return B_ERROR;
        }

        BMemoryIO stream(data, len);

        // Try to read as an archived bitmap.
        stream.Seek(0, SEEK_SET);
        BMessage archive;
        status_t result = archive.Unflatten(&stream);
        if (result != B_OK)
                return result;

        *out = new BBitmap(&archive);
        if (*out == NULL)
                return B_ERROR;

        result = (*out)->InitCheck();
        if (result != B_OK) {
                delete *out;
                *out = NULL;
        }

        return result;
}


static BLocker resLock;
static BImageResources* resources = NULL;

// This class is used as a static instance to delete the resources
// global object when the image is getting unloaded.
class _TTrackerCleanupResources {
public:
        _TTrackerCleanupResources()
        {
        }

        ~_TTrackerCleanupResources()
        {
                delete resources;
                resources = NULL;
        }
};


namespace BPrivate {

static _TTrackerCleanupResources CleanupResources;

BImageResources* GetTrackerResources()
{
        if (!resources) {
                BAutolock lock(&resLock);
                resources = new BImageResources(&resources);
        }

        return resources;
}

} // namespace BPrivate