Add an asynchronous version of Texture2D::sub_image

[libs/gl.git] / source / backends / opengl / texture2d_backend.cpp

diff --git a/source/backends/opengl/texture2d_backend.cpp b/source/backends/opengl/texture2d_backend.cpp
index 54c82280e5b1a0e3e30b0e51bc7a1da6abf28ff6..ab0c6d8cfb48ccf484da7d596fe8adf84ec07cf1 100644 (file)
--- a/source/backends/opengl/texture2d_backend.cpp
+++ b/source/backends/opengl/texture2d_backend.cpp
@@ -50,20 +50,20 @@ void OpenGLTexture2D::allocate()
        if(ARB_texture_storage)
        {
                if(ARB_direct_state_access)
-                       glTextureStorage2D(id, self.levels, gl_fmt, self.width, self.height);
+                       glTextureStorage2D(id, n_levels, gl_fmt, self.width, self.height);
                else
                {
                        bind_scratch();
-                       glTexStorage2D(target, self.levels, gl_fmt, self.width, self.height);
+                       glTexStorage2D(target, n_levels, gl_fmt, self.width, self.height);
                }
        }
        else
        {
                bind_scratch();
-               glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, self.levels-1);
+               glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, n_levels-1);
                GLenum comp = get_gl_components(get_components(storage_fmt));
                GLenum type = get_gl_type(get_component_type(storage_fmt));
-               for(unsigned i=0; i<self.levels; ++i)
+               for(unsigned i=0; i<n_levels; ++i)
                {
                        auto lv_size = self.get_level_size(i);
                        glTexImage2D(target, i, gl_fmt, lv_size.x, lv_size.y, 0, comp, type, 0);
@@ -107,7 +107,7 @@ uint64_t OpenGLTexture2D::get_data_size() const
 
        size_t level_size = self.width*self.height*get_pixel_size(format);
        size_t total_size = level_size;
-       for(unsigned i=0; i<self.levels; ++i, level_size>>=2)
+       for(unsigned i=0; i<n_levels; ++i, level_size>>=2)
                total_size += level_size;
        return total_size;
 }
@@ -119,6 +119,47 @@ void OpenGLTexture2D::unload()
 }
 
 
+OpenGLTexture2D::AsyncTransfer::AsyncTransfer(AsyncTransfer &&other):
+       pixel_buffer(other.pixel_buffer)
+{
+       other.pixel_buffer = 0;
+}
+
+OpenGLTexture2D::AsyncTransfer &OpenGLTexture2D::AsyncTransfer::operator=(AsyncTransfer &&other)
+{
+       delete pixel_buffer;
+       pixel_buffer = other.pixel_buffer;
+       other.pixel_buffer = 0;
+
+       return *this;
+}
+
+OpenGLTexture2D::AsyncTransfer::~AsyncTransfer()
+{
+       delete pixel_buffer;
+}
+
+void *OpenGLTexture2D::AsyncTransfer::allocate()
+{
+       const Texture2D::AsyncTransfer &self = *static_cast<const Texture2D::AsyncTransfer *>(this);
+
+       pixel_buffer = new Buffer;
+       pixel_buffer->storage(self.data_size, STREAMING);
+       return pixel_buffer->map();
+}
+
+void OpenGLTexture2D::AsyncTransfer::finalize()
+{
+       const Texture2D::AsyncTransfer &self = *static_cast<const Texture2D::AsyncTransfer *>(this);
+
+       pixel_buffer->unmap();
+
+       glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pixel_buffer->id);
+       self.texture->OpenGLTexture2D::sub_image(self.level, self.x, self.y, self.width, self.height, 0);
+       glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
+}
+
+
 OpenGLTexture2D::AsyncLoader::AsyncLoader(Texture2D &t, IO::Seekable &i):
        texture(t),
        io(i)