EmscriptenAsyncTextureLoad.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "IAsyncTextureLoad.h"
#include "Helpers.h"
#include "Types.h"
#include "GLHelpers.h"
#include "ICallback.h"
#include "AsyncTexturing.h"
#include <string>
#include <vector>

namespace Eegeo
{
    namespace Emscripten
    {
        class EmscriptenAsyncTextureLoad : public Rendering::AsyncTexturing::IAsyncTextureLoad
        {
            const Helpers::ICallback1<const Eegeo::Rendering::AsyncTexturing::AsyncTextureLoadResult>& m_completionCallback;
            std::string m_fileExtension;
            const std::vector<Byte>* m_pResourceBuffer;
            void* m_pUserData;
            bool m_mipmap;
            bool m_use565Format;
            bool m_flipVertically;
            GLuint m_textureId;
            bool m_cancelled;
            bool m_started;
            int m_mapId;
            bool m_mapExists;

            EmscriptenAsyncTextureLoad(
                Helpers::ITextureFileLoader& textureLoader,
                const Helpers::ICallback1<const Eegeo::Rendering::AsyncTexturing::AsyncTextureLoadResult>& completionCallback,
                const std::string& fileExtension,
                const std::vector<Byte>* pResourceBuffer,
                void* pUserData,
                bool mipmap,
                bool use565Format,
                bool flipVertically,
                int mapId);

            ~EmscriptenAsyncTextureLoad();

            void BeginAsyncTextureDecode();

        public:

            static EmscriptenAsyncTextureLoad& Build(
                Helpers::ITextureFileLoader& textureLoader,
                const Helpers::ICallback1<const Eegeo::Rendering::AsyncTexturing::AsyncTextureLoadResult>& completionCallback,
                const std::string& fileExtension,
                const std::vector<Byte>& resourceBuffer,
                void* pUserData,
                bool mipmap,
                bool use565Format,
                bool flipVertically,
                int mapId);

            virtual void Begin();

            virtual void Cancel();

            void HandleTextureDecodingComplete(GLuint textureId, bool success, int width, int height, bool mapWasRemoved);
        };
    }
}