GLESImage.h

/*--------------------------------------------------------------------------------------------
Copyright (c) 2019, NDEVR LLC
tyler.parke@ndevr.org
  __    __   ____     _____ __     __  _______
 |  \  |  | |  __ \  |  ___|\ \   / / |   __  \
 |   \ |  | | |  \ \ | |___  \ \ / /  |  |__)  |
 |  . \|  | | |__/ / | |___   \ V /   |   _   /
 |  |\    |_|_____/__|_____|___\_/____|  | \  \
 |__| \__________________________________|  \__\
 
Subject to the terms of the Enterprise+ Agreement, NDEVR hereby grants
Licensee a limited, non-exclusive, non-transferable, royalty-free license
(without the right to sublicense) to use the API solely for the purpose of
Licensee's internal development efforts to develop applications for which
the API was provided.
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
 
Library: Graphics
File: VulkanImage
Included in API: True
Author(s): Tyler Parke
 *-----------------------------------------------------------------------------------------**/
#pragma once
#include "DLLInfo.h"
#include "GLBuffer.h"
#include "GLESShader.h"
#include "GLESGraphicsDevice.h"
#include <NDEVR/ImageFactory.h>
#include <NDEVR/Image.h>
#include <NDEVR/Pointer.h>
#include <NDEVR/File.h>
#include <NDEVR/RGBColor.h>
#include <NDEVR/Dictionary.h>
#include <NDEVR/Buffer.h>
 
typedef uint32_t VkImageUsageFlags;
typedef uint32_t VkMemoryPropertyFlags;
namespace NDEVR
{
    class File;
    class VulkanInstance;
    class VulkanBuffer;
    class GLESImageData : public Image
    {
    public:
        GLESImageData(const DynamicPointer<GLESGraphicsDevice>& device, const StringView& image_id)
            : m_image(image_id)
        {
 
            update(device);
        }

        void destroy(const DynamicPointer<GLESGraphicsDevice>& instance)
        {
            if (IsValid(m_gles_image))
                instance->glDeleteTextures(1, &m_gles_image);
            m_gles_image = Constant<uint04>::Invalid;
        }

        void update(const DynamicPointer<GLESGraphicsDevice>& instance)
        {
            destroy(instance);
            bool has_image = ImageFactory::DefaultFactory().hasImage(m_image);
            lib_assert(has_image, "Invalid GLES image");
            if (!has_image)
                return;
            instance->glGenTextures(1, &m_gles_image);
            instance->glBindTexture(GL_TEXTURE_2D, m_gles_image);
            // set the texture wrapping/filtering options (on the currently bound texture object)
            instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
            instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
            instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
            instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
            //instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            //instance->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            // load and generate the texture
            {
                ImageReadPointer img = ImageFactory::DefaultFactory().getUncompressed(m_image);
                lib_assert(!img.isNull(), "Bad image");
                if (!img.isNull())
                {
                    m_size = img->size;
                    uint04 max_size = m_size.dimensionalValue<MAX>();
 
                    m_modified_time = img->modified_time;
                    if (max_size > cast<uint04>(instance->capabilities().max_texture_size))
                    {
                        max_size = cast<uint04>(instance->capabilities().max_texture_size);
                        Vector<2, uint04> new_size = (max_size * m_size) / m_size;
                        Buffer<uint01> resized;
                        ImageFactory::Resize(img->decompressed_data, m_size, new_size, resized);
                        instance->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, new_size[X], new_size[Y], 0, GL_RGBA, GL_UNSIGNED_BYTE, resized.begin());
                    }
                    else
                    {
                        instance->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_size[X], m_size[Y], 0, GL_RGBA, GL_UNSIGNED_BYTE, img->decompressed_data.begin());
                    }
                }
            }
            instance->glGenerateMipmap(GL_TEXTURE_2D);
            instance->glBindTexture(GL_TEXTURE_2D, 0);
        }

        void setUniformVariables(uint04 bind_position, const DynamicPointer<GLESGraphicsDevice>& instance) const
        {
            instance->glActiveTexture(GL_TEXTURE0 + bind_position);
            instance->glBindTexture(GL_TEXTURE_2D, m_gles_image);
        }

        bool hasAlpha() const
        {
            return m_has_alpha;
        }

        bool needsUpdate() const
        {
            return m_modified_time < ImageFactory().modifiedTime(m_image);
        }
    private:
        String m_image;                                                  
        Time m_modified_time = Time(0);                                  
        GLuint m_gles_image = Constant<uint04>::Invalid;                 
        Vector<2, uint04> m_size = Constant<Vector<2, uint04>>::Invalid; 
        bool m_has_alpha = false;                                        
    };

    class GLESImageManager
    {
    public:
        GLESImageManager(const DynamicPointer<GLESGraphicsDevice>& instance)
            : m_device(instance)
        {
 
        }

        ~GLESImageManager()
        {
            for (auto& iter : m_file_map)
                iter.second->destroy(m_device);
        }

        bool updateImages()
        {
            bool updated = false;
            for (auto& iter : m_file_map)
            {
                if (iter.second->needsUpdate())
                {
                    iter.second->update(m_device);
                    updated = true;
                }
            }
            return updated;
        }

        bool needsImageUpdate() const
        {
            for (auto& iter : m_file_map)
            {
                if (iter.second->needsUpdate())
                    return true;
            }
            return false;
        }

        ConstPointer<GLESImageData> getImage(const StringView& id)
        {
            auto iter = m_file_map.find(id);
            if (iter == m_file_map.end())
            {
                DynamicPointer<GLESImageData> image = new GLESImageData(m_device, id);
                if (image->size().magnitudeSquared() > 0 && IsValid(image->size()))
                    m_file_map[String(id)] = image;
                return image;
            }
            return iter.value();
        }
 
        Dictionary<String, DynamicPointer<GLESImageData>> m_file_map; 
        DynamicPointer<GLESGraphicsDevice> m_device;                 
    };
}