Method uploadLayer

src/main/java/field/graphics/Texture.java:336–381

(ByteBuffer upload, boolean stream, int z)

            Log.log("texture.trace",
                    () -> "upload, part 1, for texture " + this + " " + s + " " + upload.capacity() + " ");

            if (s == null) return;
            s.x0 = 0;
            s.x1 = specification.width;
            s.y0 = 0;
            s.y1 = specification.height;
            s.z = z;
            glBindBuffer(GL_PIXEL_UNPACK_BUFFER, isDoubleBuffered ? (stream ? s.pboA : s.pboB) : s.pbo);
            glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
            glPixelStorei(GL_UNPACK_ROW_LENGTH, specification.width);

            int start = 0;
            int end = specification.elementSize * specification.width*specification.height;
            s.old = glMapBufferRange(GL21.GL_PIXEL_UNPACK_BUFFER, start, end - start,
                    GL30.GL_MAP_WRITE_BIT | GL30.GL_MAP_INVALIDATE_RANGE_BIT | GL30.GL_MAP_UNSYNCHRONIZED_BIT,
                    s.old);

            s.old.position(0);
            upload.clear();
            s.old.limit(end - start);
            upload.limit(end - start);

            s.old.put(upload);

            upload.clear();
            upload.rewind();
            s.old.clear();
            s.old.rewind();

            bytesUploaded += s.old.limit();

            GL15.glUnmapBuffer(GL21.GL_PIXEL_UNPACK_BUFFER);
            GL15.glBindBuffer(GL21.GL_PIXEL_UNPACK_BUFFER, 0);
            Log.log("graphics.trace", () -> "uploaded part 1");
            s.mod++;
        }, -2)/*.setOnceOnly()*/.setAllContextsFor(this));
    }

    public int getPendingUploads() {
        return pendingUploads.get();
    }

    protected boolean perform0() {

        State s = GraphicsContext.get(this);

        Log.log("graphics.trace", () -> "activating texture :" + specification.unit + " = " + s.name);

        glActiveTexture(GL_TEXTURE0 + specification.unit);